1
|
Tuliozi B, Mantovani R, Schoepf I, Tsuruta S, Mancin E, Sartori C. Genetic correlations of direct and indirect genetic components of social dominance with fitness and morphology traits in cattle. Genet Sel Evol 2023; 55:84. [PMID: 38037008 PMCID: PMC10687847 DOI: 10.1186/s12711-023-00845-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 10/02/2023] [Indexed: 12/02/2023] Open
Abstract
BACKGROUND Within the same species, individuals show marked variation in their social dominance. Studies on a handful of populations have indicated heritable genetic variation for this trait, which is determined by both the genetic background of the individual (direct genetic effect) and of its opponent (indirect genetic effect). However, the evolutionary consequences of selection for this trait are largely speculative, as it is not a usual target of selection in livestock populations. Moreover, studying social dominance presents the challenge of working with a phenotype with a mean value that cannot change in the population, as for every winner of an agonistic interaction there will necessarily be a loser. Thus, to investigate what could be the evolutionary response to selection for social dominance, it is necessary to focus on traits that might be correlated with it. This study investigated the genetic correlations of social dominance, both direct and indirect, with several morphology and fitness traits. We used a dataset of agonistic contests involving cattle (Bos taurus): during these contests, pairs of cows compete in ritualized interactions to assess social dominance. The outcomes of 37,996 dominance interactions performed by 8789 cows over 20 years were combined with individual data for fertility, mammary health, milk yield and morphology and analysed using bivariate animal models including indirect genetic effects. RESULTS We found that winning agonistic interactions has a positive genetic correlation with more developed frontal muscle mass, lower fertility, and poorer udder health. We also discovered that the trends of changes in the estimated breeding values of social dominance, udder health and more developed muscle mass were consistent with selection for social dominance in the population. CONCLUSIONS We present evidence that social dominance is genetically correlated with fitness traits, as well as empirical evidence of the possible evolutionary trade-offs between these traits. We show that it is feasible to estimate genetic correlations involving dyadic social traits.
Collapse
Affiliation(s)
- Beniamino Tuliozi
- Department of Biology, Duke University, Durham, NC, 27708, USA.
- Department of Agronomy, Food, Natural Resources, Animals and Environment, University of Padova, Viale Dell'Università 16, 35020, Legnaro, Italy.
| | - Roberto Mantovani
- Department of Agronomy, Food, Natural Resources, Animals and Environment, University of Padova, Viale Dell'Università 16, 35020, Legnaro, Italy
| | - Ivana Schoepf
- Department of Sciences, Augustana Campus, University of Alberta, 4901 46 Ave, Camrose, AB, T4V 2R3, Canada
| | - Shogo Tsuruta
- Department of Animal and Dairy Science, University of Georgia, Athens, GA, 30602, USA
| | - Enrico Mancin
- Department of Agronomy, Food, Natural Resources, Animals and Environment, University of Padova, Viale Dell'Università 16, 35020, Legnaro, Italy
| | - Cristina Sartori
- Department of Agronomy, Food, Natural Resources, Animals and Environment, University of Padova, Viale Dell'Università 16, 35020, Legnaro, Italy
| |
Collapse
|
2
|
Gauzere J, Pemberton JM, Kruuk LEB, Morris A, Morris S, Walling CA. Maternal effects do not resolve the paradox of stasis in birth weight in a wild red deer populaton. Evolution 2022; 76:2605-2617. [PMID: 36111977 PMCID: PMC9828841 DOI: 10.1111/evo.14622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 08/14/2022] [Indexed: 01/22/2023]
Abstract
In natural populations, quantitative traits seldom show short-term evolution at the rate predicted by evolutionary models. Resolving this "paradox of stasis" is a key goal in evolutionary biology, as it directly challenges our capacity to predict evolutionary change. One particularly promising hypothesis to explain the lack of evolutionary responses in a key offspring trait, body weight, is that positive selection on juveniles is counterbalanced by selection against maternal investment in offspring growth, given that reproduction is costly for the mothers. Here, we used data from one of the longest individual-based studies of a wild mammal population to test this hypothesis. We first showed that despite positive directional selection on birth weight, and heritable variation for this trait, no genetic change has been observed for birth weight over the past 47 years in the study population. Contrarily to our expectation, we found no evidence of selection against maternal investment in birth weight-if anything, selection favors mothers that produce large calves. Accordingly, we show that genetic change in birth weight over the study period is actually lower than that predicted from models including selection on maternal performance; ultimately our analysis here only deepens rather than resolves the paradox of stasis.
Collapse
Affiliation(s)
- Julie Gauzere
- Institute of Evolutionary Biology, School of Biological SciencesUniversity of EdinburghEdinburghEH9 3FLUK
| | - Josephine M. Pemberton
- Institute of Evolutionary Biology, School of Biological SciencesUniversity of EdinburghEdinburghEH9 3FLUK
| | - Loeske E. B. Kruuk
- Institute of Evolutionary Biology, School of Biological SciencesUniversity of EdinburghEdinburghEH9 3FLUK,Research School of BiologyThe Australian National UniversityCanberraACT 0200Australia
| | - Alison Morris
- Institute of Evolutionary Biology, School of Biological SciencesUniversity of EdinburghEdinburghEH9 3FLUK
| | - Sean Morris
- Institute of Evolutionary Biology, School of Biological SciencesUniversity of EdinburghEdinburghEH9 3FLUK
| | - Craig A. Walling
- Institute of Evolutionary Biology, School of Biological SciencesUniversity of EdinburghEdinburghEH9 3FLUK
| |
Collapse
|
3
|
Gutiérrez F, Peri JM, Baillès E, Sureda B, Gárriz M, Vall G, Cavero M, Mallorquí A, Ruiz Rodríguez J. A Double-Track Pathway to Fast Strategy in Humans and Its Personality Correlates. Front Psychol 2022; 13:889730. [PMID: 35756215 PMCID: PMC9218359 DOI: 10.3389/fpsyg.2022.889730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 05/19/2022] [Indexed: 11/13/2022] Open
Abstract
The fast-slow paradigm of life history (LH) focuses on how individuals grow, mate, and reproduce at different paces. This paradigm can contribute substantially to the field of personality and individual differences provided that it is more strictly based on evolutionary biology than it has been so far. Our study tested the existence of a fast-slow continuum underlying indicators of reproductive effort-offspring output, age at first reproduction, number and stability of sexual partners-in 1,043 outpatients with healthy to severely disordered personalities. Two axes emerged reflecting a double-track pathway to fast strategy, based on restricted and unrestricted sociosexual strategies. When rotated, the fast-slow and sociosexuality axes turned out to be independent. Contrary to expectations, neither somatic effort-investment in status, material resources, social capital, and maintenance/survival-was aligned with reproductive effort, nor a clear tradeoff between current and future reproduction was evident. Finally, we examined the association of LH axes with seven high-order personality pathology traits: negative emotionality, impulsivity, antagonism, persistence-compulsivity, subordination, and psychoticism. Persistent and disinhibited subjects appeared as fast-restricted and fast-unrestricted strategists, respectively, whereas asocial subjects were slow strategists. Associations of LH traits with each other and with personality are far more complex than usually assumed in evolutionary psychology.
Collapse
Affiliation(s)
- Fernando Gutiérrez
- Institute of Neuroscience, Hospital Clínic de Barcelona, Barcelona, Spain.,Institut d'Investigacións Biomèdiques August Pi Sunyer (IDIBAPS), Barcelona, Spain
| | - Josep M Peri
- Institute of Neuroscience, Hospital Clínic de Barcelona, Barcelona, Spain
| | - Eva Baillès
- Department of Experimental and Health Sciences, Pompeu Fabra University, Barcelona, Spain
| | - Bárbara Sureda
- Institute of Neuroscience, Hospital Clínic de Barcelona, Barcelona, Spain
| | - Miguel Gárriz
- Institut de Neuropsiquiatria i Addiccions (INAD), Parc de Salut Mar, Barcelona, Spain
| | - Gemma Vall
- Department of Psychiatry, Mental Health, and Addiction, GSS-Hospital Santa Maria, Lleida, Spain.,Lleida Institute for Biomedical Research Dr. Pifarré Foundation, Lleida, Spain
| | - Myriam Cavero
- Institute of Neuroscience, Hospital Clínic de Barcelona, Barcelona, Spain
| | - Aida Mallorquí
- Institute of Neuroscience, Hospital Clínic de Barcelona, Barcelona, Spain
| | - José Ruiz Rodríguez
- Department of Clinical Psychology and Psychobiology, Personality, Evaluation and Psychological Treatment Section, Institute of Neurosciences, University of Barcelona, Barcelona, Spain
| |
Collapse
|
4
|
Bangura PB, Tiira K, Niemelä PT, Erkinaro J, Liljeström P, Toikkanen A, Primmer CR. Linking vgll3 genotype and aggressive behaviour in juvenile Atlantic salmon (Salmo salar). JOURNAL OF FISH BIOLOGY 2022; 100:1264-1271. [PMID: 35289932 PMCID: PMC9311142 DOI: 10.1111/jfb.15040] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 03/11/2022] [Indexed: 06/14/2023]
Abstract
We tested the possibility that vgll3, a gene linked with maturation age in Atlantic salmon (Salmo salar), may be associated with behaviour by measuring aggressiveness and feeding activity in 380 juveniles with different vgll3 genotypes. Contrary to our prediction, individuals with the genotype associated with later maturation (vgll3*LL) were significantly more aggressive than individuals with the genotype associated with earlier maturation (vgll3*EE). Individuals with higher aggression were also significantly lighter in colour and had higher feeding activity. Although higher aggression was associated with higher feeding activity, there was no association between feeding activity and vgll3 genotype. Increased aggression of vgll3*LL individuals was independent of their sex and size, and genotypes did not differ in their condition factor. These results imply that aggressive behaviour may have an energetic cost impairing growth and condition, especially when food cannot be monopolized. This may have implications for individual fitness and aquaculture practices.
Collapse
Affiliation(s)
- Paul Bai Bangura
- Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental SciencesUniversity of HelsinkiHelsinkiFinland
- Lammi Biological StationUniversity of HelsinkiLammiFinland
| | - Katriina Tiira
- Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental SciencesUniversity of HelsinkiHelsinkiFinland
| | - Petri T. Niemelä
- Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental SciencesUniversity of HelsinkiHelsinkiFinland
| | | | - Petra Liljeström
- Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental SciencesUniversity of HelsinkiHelsinkiFinland
- Lammi Biological StationUniversity of HelsinkiLammiFinland
| | - Anna Toikkanen
- Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental SciencesUniversity of HelsinkiHelsinkiFinland
| | - Craig R. Primmer
- Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental SciencesUniversity of HelsinkiHelsinkiFinland
- Institute of BiotechnologyHelsinki Institute of Life Science (HiLIFE)HelsinkiFinland
| |
Collapse
|
5
|
Class B, Dingemanse NJ. A variance partitioning perspective of assortative mating: Proximate mechanisms and evolutionary implications. J Evol Biol 2022; 35:483-490. [PMID: 35304800 DOI: 10.1111/jeb.13998] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 02/28/2022] [Accepted: 03/03/2022] [Indexed: 12/20/2022]
Abstract
Assortative mating occurs when paired individuals of the same population are more similar than expected by chance. This form of non-random assortment has long been predicted to play a role in many evolutionary processes because assortatively mated individuals are assumed to be genetically similar. However, this assumption may always hold for labile traits, or traits that are measured with error. For such traits, there is a variety of proximate mechanisms that can drive phenotypic resemblance between mated partners that, notably, have very different evolutionary repercussions. Bettering our understanding of the role of assortative mating in evolution will thus require insight into its proximate causes. To date, empirical research remains sparse, especially when for labile traits. This special issue aims to stimulate such research while promoting the usage and development of statistical approaches allowing the quantification of the relative roles of alternative proximate mechanisms causing assortative mating. To this end, we first describe how the phenotypic covariance between mated partners can be usefully partitioned into components that capture one or several of five distinct mechanisms. We then demonstrate why the importance of mechanisms causing genetic covariance between the traits of partners may often be overestimated. Finally, we detail how the evolutionary causes and consequences of the diverse mechanisms may be identified.
Collapse
Affiliation(s)
- Barbara Class
- Global Change Ecology Research Group, University of the Sunshine Coast, Sippy Downs, Australia
| | - Niels J Dingemanse
- Behavioural Ecology, Department of Biology, Ludwig Maximilians University of Munich, Sippy Downs, Germany
| |
Collapse
|
6
|
McGlothlin JW, Fisher DN. Social Selection and the Evolution of Maladaptation. J Hered 2021; 113:61-68. [PMID: 34850889 DOI: 10.1093/jhered/esab061] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 10/07/2021] [Indexed: 11/15/2022] Open
Abstract
Evolution by natural selection is often viewed as a process that inevitably leads to adaptation or an increase in population fitness over time. However, maladaptation, an evolved decrease in fitness, may also occur in response to natural selection under some conditions. Social selection, which arises from the effects of social partners on fitness, has been identified as a potential cause of maladaptation, but we lack a general rule identifying when social selection should lead to a decrease in population mean fitness. Here we use a quantitative genetic model to develop such a rule. We show that maladaptation is most likely to occur when social selection is strong relative to nonsocial selection and acts in an opposing direction. In this scenario, the evolution of traits that impose fitness costs on others may outweigh evolved gains in fitness for the individual, leading to a net decrease in population mean fitness. Furthermore, we find that maladaptation may also sometimes occur when phenotypes of interacting individuals negatively covary. We outline the biological situations where maladaptation in response to social selection can be expected, provide both quantitative genetic and phenotypic versions of our derived result, and suggest what empirical work would be needed to test it. We also consider the effect of social selection on inclusive fitness and support previous work showing that inclusive fitness cannot suffer an evolutionary decrease. Taken together, our results show that social selection may decrease population mean fitness when it opposes individual-level selection, even as inclusive fitness increases.
Collapse
Affiliation(s)
- Joel W McGlothlin
- Department of Biological Sciences, Virginia Tech, Derring Hall Room 2125, 926 West Campus Drive (MC 0406), Blacksburg, VA 24061, USA
| | - David N Fisher
- School of Biological Sciences, University of Aberdeen, King's College, Aberdeen AB24 3FX, UK
| |
Collapse
|
7
|
Libourel C, Baron E, Lenglet J, Amsellem L, Roby D, Roux F. The Genomic Architecture of Competitive Response of Arabidopsis thaliana Is Highly Flexible Among Plurispecific Neighborhoods. FRONTIERS IN PLANT SCIENCE 2021; 12:741122. [PMID: 34899774 PMCID: PMC8656689 DOI: 10.3389/fpls.2021.741122] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 10/11/2021] [Indexed: 06/14/2023]
Abstract
Plants are daily challenged by multiple abiotic and biotic stresses. A major biotic constraint corresponds to competition with other plant species. Although plants simultaneously interact with multiple neighboring species throughout their life cycle, there is still very limited information about the genetics of the competitive response in the context of plurispecific interactions. Using a local mapping population of Arabidopsis thaliana, we set up a genome wide association study (GWAS) to estimate the extent of genetic variation of competitive response in 12 plant species assemblages, based on three competitor species (Poa annua, Stellaria media, and Veronica arvensis). Based on five phenotypic traits, we detected strong crossing reaction norms not only between the three bispecific neighborhoods but also among the plurispecific neighborhoods. The genetic architecture of competitive response was highly dependent on the identity and the relative abundance of the neighboring species. In addition, most of the enriched biological processes underlying competitive responses largely differ among neighborhoods. While the RNA related processes might confer a broad range response toolkit for multiple traits in diverse neighborhoods, some processes, such as signaling and transport, might play a specific role in particular assemblages. Altogether, our results suggest that plants can integrate and respond to different species assemblages depending on the identity and number of each neighboring species, through a large range of candidate genes associated with diverse and unexpected processes leading to developmental and stress responses.
Collapse
Affiliation(s)
- Cyril Libourel
- Laboratoire des Interactions Plantes-Microbes-Environnement, Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, CNRS, Université de Toulouse, Castanet-Tolosan, France
| | - Etienne Baron
- Laboratoire des Interactions Plantes-Microbes-Environnement, Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, CNRS, Université de Toulouse, Castanet-Tolosan, France
- Laboratoire Evolution, Ecologie et Paléontologie, UMR CNRS 8198, Université de Lille, Villeneuve d’Ascq Cedex, France
| | - Juliana Lenglet
- Laboratoire Evolution, Ecologie et Paléontologie, UMR CNRS 8198, Université de Lille, Villeneuve d’Ascq Cedex, France
| | - Laurent Amsellem
- Laboratoire Evolution, Ecologie et Paléontologie, UMR CNRS 8198, Université de Lille, Villeneuve d’Ascq Cedex, France
| | - Dominique Roby
- Laboratoire des Interactions Plantes-Microbes-Environnement, Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, CNRS, Université de Toulouse, Castanet-Tolosan, France
| | - Fabrice Roux
- Laboratoire des Interactions Plantes-Microbes-Environnement, Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, CNRS, Université de Toulouse, Castanet-Tolosan, France
- Laboratoire Evolution, Ecologie et Paléontologie, UMR CNRS 8198, Université de Lille, Villeneuve d’Ascq Cedex, France
| |
Collapse
|
8
|
McAdam AG, Webber QMR, Dantzer B, Lane JE, Boutin S. Social Effects on Annual Fitness in Red Squirrels. J Hered 2021; 113:69-78. [PMID: 34679173 DOI: 10.1093/jhered/esab051] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 09/01/2021] [Indexed: 11/12/2022] Open
Abstract
When resources are limited, mean fitness is constrained and competition can cause genes and phenotypes to enhance an individual's own fitness while reducing the fitness of their competitors. Negative social effects on fitness have the potential to constrain adaptation, but the interplay between ecological opportunity and social constraints on adaptation remains poorly studied in nature. Here, we tested for evidence of phenotypic social effects on annual fitness (survival and reproductive success) in a long-term study of wild North American red squirrels (Tamiasciurus hudsonicus) under conditions of both resource limitation and super-abundant food resources. When resources were limited, populations remained stable or declined, and there were strong negative social effects on annual survival and reproductive success. That is, mean fitness was constrained and individuals had lower fitness when other nearby individuals had higher fitness. In contrast, when food resources were super-abundant, populations grew and social constraints on reproductive success were greatly reduced or eliminated. Unlike reproductive success, social constraints on survival were not significantly reduced when food resources were super-abundant. These findings suggest resource-dependent social constraints on a component of fitness, which have important potential implications for evolution and adaptation.
Collapse
Affiliation(s)
- Andrew G McAdam
- Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, Boulder, Colorado, USA
| | - Quinn M R Webber
- Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, Boulder, Colorado, USA
| | - Ben Dantzer
- Department of Psychology, University of Michigan, Ann Arbor, Michigan, USA.,Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, USA
| | - Jeffrey E Lane
- Department of Biology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Stan Boutin
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| |
Collapse
|
9
|
Bond MN, Piertney SB, Benton TG, Cameron TC. Plasticity is a locally adapted trait with consequences for ecological dynamics in novel environments. Ecol Evol 2021; 11:10868-10879. [PMID: 34429886 PMCID: PMC8366859 DOI: 10.1002/ece3.7813] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 05/28/2021] [Indexed: 11/17/2022] Open
Abstract
Phenotypic plasticity is predicted to evolve in more variable environments, conferring an advantage on individual lifetime fitness. It is less clear what the potential consequences of that plasticity will have on ecological population dynamics. Here, we use an invertebrate model system to examine the effects of environmental variation (resource availability) on the evolution of phenotypic plasticity in two life history traits-age and size at maturation-in long-running, experimental density-dependent environments. Specifically, we then explore the feedback from evolution of life history plasticity to subsequent ecological dynamics in novel conditions. Plasticity in both traits initially declined in all microcosm environments, but then evolved increased plasticity for age-at-maturation, significantly so in more environmentally variable environments. We also demonstrate how plasticity affects ecological dynamics by creating founder populations of different plastic phenotypes into new microcosms that had either familiar or novel environments. Populations originating from periodically variable environments that had evolved greatest plasticity had lowest variability in population size when introduced to novel environments than those from constant or random environments. This suggests that while plasticity may be costly it can confer benefits by reducing the likelihood that offspring will experience low survival through competitive bottlenecks in variable environments. In this study, we demonstrate how plasticity evolves in response to environmental variation and can alter population dynamics-demonstrating an eco-evolutionary feedback loop in a complex animal moderated by plasticity in growth.
Collapse
Affiliation(s)
| | | | - Tim G. Benton
- Faculty of Biological SciencesUniversity of LeedsLeedsUK
| | | |
Collapse
|
10
|
Fokkema RW, Korsten P, Schmoll T, Wilson AJ. Social competition as a driver of phenotype-environment correlations: implications for ecology and evolution. Biol Rev Camb Philos Soc 2021; 96:2561-2572. [PMID: 34145714 PMCID: PMC9290562 DOI: 10.1111/brv.12768] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Revised: 06/09/2021] [Accepted: 06/11/2021] [Indexed: 12/27/2022]
Abstract
While it is universally recognised that environmental factors can cause phenotypic trait variation via phenotypic plasticity, the extent to which causal processes operate in the reverse direction has received less consideration. In fact individuals are often active agents in determining the environments, and hence the selective regimes, they experience. There are several important mechanisms by which this can occur, including habitat selection and niche construction, that are expected to result in phenotype–environment correlations (i.e. non‐random assortment of phenotypes across heterogeneous environments). Here we highlight an additional mechanism – intraspecific competition for preferred environments – that may be widespread, and has implications for phenotypic evolution that are currently underappreciated. Under this mechanism, variation among individuals in traits determining their competitive ability leads to phenotype–environment correlation; more competitive phenotypes are able to acquire better patches. Based on a concise review of the empirical evidence we argue that competition‐induced phenotype–environment correlations are likely to be common in natural populations before highlighting the major implications of this for studies of natural selection and microevolution. We focus particularly on two central issues. First, competition‐induced phenotype–environment correlation leads to the expectation that positive feedback loops will amplify phenotypic and fitness variation among competing individuals. As a result of being able to acquire a better environment, winners gain more resources and even better phenotypes – at the expense of losers. The distinction between individual quality and environmental quality that is commonly made by researchers in evolutionary ecology thus becomes untenable. Second, if differences among individuals in competitive ability are underpinned by heritable traits, competition results in both genotype–environment correlations and an expectation of indirect genetic effects (IGEs) on resource‐dependent life‐history traits. Theory tells us that these IGEs will act as (partial) constraints, reducing the amount of genetic variance available to facilitate evolutionary adaptation. Failure to recognise this will lead to systematic overestimation of the adaptive potential of populations. To understand the importance of these issues for ecological and evolutionary processes in natural populations we therefore need to identify and quantify competition‐induced phenotype–environment correlations in our study systems. We conclude that both fundamental and applied research will benefit from an improved understanding of when and how social competition causes non‐random distribution of phenotypes, and genotypes, across heterogeneous environments.
Collapse
Affiliation(s)
- Rienk W Fokkema
- Department of Animal Behaviour, Bielefeld University, Konsequenz 45, Bielefeld, 33615, Germany.,Evolutionary Biology, Bielefeld University, Konsequenz 45, Bielefeld, 33615, Germany.,Conservation Ecology Group, Groningen Institute for Evolutionary Life Sciences (GELIFES), University of Groningen, Nijenborgh 7, Groningen, 9747AG, The Netherlands
| | - Peter Korsten
- Department of Animal Behaviour, Bielefeld University, Konsequenz 45, Bielefeld, 33615, Germany
| | - Tim Schmoll
- Evolutionary Biology, Bielefeld University, Konsequenz 45, Bielefeld, 33615, Germany
| | - Alastair J Wilson
- Centre for Ecology and Conservation, University of Exeter (Penryn Campus), Penryn, Cornwall, TR10 9FE, United Kingdom
| |
Collapse
|
11
|
Santostefano F, Allegue H, Garant D, Bergeron P, Réale D. Indirect genetic and environmental effects on behaviors, morphology, and life-history traits in a wild Eastern chipmunk population. Evolution 2021; 75:1492-1512. [PMID: 33855713 DOI: 10.1111/evo.14232] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 03/18/2021] [Accepted: 03/22/2021] [Indexed: 12/24/2022]
Abstract
Additive genetic variance in a trait reflects its potential to respond to selection, which is key for adaptive evolution in the wild. Social interactions contribute to this genetic variation through indirect genetic effects-the effect of an individual's genotype on the expression of a trait in a conspecific. However, our understanding of the evolutionary importance of indirect genetic effects in the wild and of their strength relative to direct genetic effects is limited. In this study, we assessed how indirect genetic effects contribute to genetic variation of behavioral, morphological, and life-history traits in a wild Eastern chipmunk population. We also compared the contribution of direct and indirect genetic effects to traits evolvabilities and related these effects to selection strength across traits. We implemented a novel approach integrating the spatial structure of social interactions in quantitative genetic analyses, and supported the reliability of our results with power analyses. We found indirect genetic effects for trappability and relative fecundity, little direct genetic effects in all traits and a large role for direct and indirect permanent environmental effects. Our study highlights the potential evolutionary role of social permanent environmental effects in shaping phenotypes of conspecifics through adaptive phenotypic plasticity.
Collapse
Affiliation(s)
- Francesca Santostefano
- Département des Sciences Biologiques, Université du Québec à Montréal, Montréal, Québec, Canada
| | - Hassen Allegue
- Département des Sciences Biologiques, Université du Québec à Montréal, Montréal, Québec, Canada
| | - Dany Garant
- Département de Biologie, Faculté des Sciences, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Patrick Bergeron
- Department of Biological Sciences, Bishop's University, Sherbrooke, Québec, Canada
| | - Denis Réale
- Département des Sciences Biologiques, Université du Québec à Montréal, Montréal, Québec, Canada
| |
Collapse
|
12
|
Roth-Monzón AJ, Belk MC, Zúñiga-Vega JJ, Johnson JB. What Drives Life-History Variation in the Livebearing Fish Poeciliopsis prolifica? An Assessment of Multiple Putative Selective Agents. Front Ecol Evol 2021. [DOI: 10.3389/fevo.2020.608046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Life-history traits are directly linked to fitness, and therefore, can be highly adaptive. Livebearers have been used as models for understanding the evolution of life histories due to their wide diversity in these traits. Several different selective pressures, including population density, predation, and resource levels, can shape life-history traits. However, these selective pressures are usually considered independently in livebearers and we lack a clear understanding of how they interact in shaping life-history evolution. Furthermore, selective pressures such as interspecific competition are rarely considered as drivers of life-history evolution in poeciliids. Here we test the simultaneous effects of several potential selective pressures on life-history traits in the livebearing fish Poeciliopsis prolifica. We employ a multi-model inference approach. We focus on four known agents of selection: resource availability, stream velocity, population density, and interspecific competition, and their effect on four life-history traits: reproductive allocation, superfetation, number of embryos, and individual embryo size. We found that models with population density and interspecific competition alone were strongly supported in our data and, hence, indicated that these two factors are the most important selective agents for most life-history traits, except for embryo size. When population density and interspecific competition increase there is an increase in each of the three life-history traits (reproductive allocation, superfetation, and number of embryos). For individual embryo size, we found that all single-agent models were equivalent and it was unclear which selective agent best explained variation. We also found that models that included population density and interspecific competition as direct effects were better supported than those that included them as indirect effects through their influence on resource availability. Our study underscores the importance of interspecific competitive interactions on shaping life-history traits and suggests that these interactions should be considered in future life-history studies.
Collapse
|
13
|
|
14
|
Abstract
Demonstrating asymmetric competition in natural systems is difficult, as the effect of large individuals on small ones has to be measured, and vice versa. Numerous experiments have quantified one side of the interaction, typically the effect of large individuals on small ones. Here, we demonstrate, using a long-term study of guppies, that an individual’s performance depends on its relative size, with large individuals being competitively dominant. Accurate prediction of both the mean and variance in body size was possible by using models incorporating asymmetric competition, whereas in models where individuals are competitively equivalent, the predictions were poor. Biotic interactions are central to both ecological and evolutionary dynamics. In the vast majority of empirical studies, the strength of intraspecific interactions is estimated by using simple measures of population size. Biologists have long known that these are crude metrics, with experiments and theory suggesting that interactions between individuals should depend on traits, such as body size. Despite this, it has been difficult to estimate the impact of traits on competitive ability from ecological field data, and this explains why the strength of biotic interactions has empirically been treated in a simplistic manner. Using long-term observational data from four different populations, we show that large Trinidadian guppies impose a significantly larger competitive pressure on conspecifics than individuals that are smaller; in other words, competition is asymmetric. When we incorporate this asymmetry into integral projection models, the predicted size structure is much closer to what we see in the field compared with models where competition is independent of body size. This difference in size structure translates into a twofold difference in reproductive output. This demonstrates how the nature of ecological interactions drives the size structure, which, in turn, will have important implications for both the ecological and evolutionary dynamics.
Collapse
|
15
|
Garant D. Natural and human-induced environmental changes and their effects on adaptive potential of wild animal populations. Evol Appl 2020; 13:1117-1127. [PMID: 32684950 PMCID: PMC7359845 DOI: 10.1111/eva.12928] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 01/23/2020] [Accepted: 01/24/2020] [Indexed: 12/26/2022] Open
Abstract
A major challenge of evolutionary ecology over the next decades is to understand and predict the consequences of the current rapid and important environmental changes on wild populations. Extinction risk of species is linked to populations' evolutionary potential and to their ability to express adaptive phenotypic plasticity. There is thus a vital need to quantify how selective pressures, quantitative genetics parameters, and phenotypic plasticity, for multiple traits in wild animal populations, may vary with changes in the environment. Here I review our previous research that integrated ecological and evolutionary theories with molecular ecology, quantitative genetics, and long-term monitoring of individually marked wild animals. Our results showed that assessing evolutionary and plastic changes over time and space, using multi-trait approaches, under a realistic range of environmental conditions are crucial steps toward improving our understanding of the evolution and adaptation of natural populations. Our current and future work focusses on assessing the limits of adaptive potential by determining the factors constraining the evolvability of plasticity, those generating covariation among genetic variance and selection, as well as indirect genetic effects, which can affect population's capacity to adjust to environmental changes. In doing so, we aim to provide an improved assessment of the spatial and temporal scale of evolutionary processes in wild animal populations.
Collapse
Affiliation(s)
- Dany Garant
- Département de biologieFaculté des SciencesUniversité de SherbrookeSherbrookeQCCanada
| |
Collapse
|
16
|
Lane SM, Wilson AJ, Briffa M. Analysis of direct and indirect genetic effects in fighting sea anemones. Behav Ecol 2020; 31:540-547. [PMID: 32210526 PMCID: PMC7083097 DOI: 10.1093/beheco/arz217] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 12/05/2019] [Accepted: 12/19/2019] [Indexed: 12/14/2022] Open
Abstract
Theoretical models of animal contests such as the Hawk-Dove game predict that variation in fighting behavior will persist due to mixed evolutionarily stable strategies (ESS) under certain conditions. However, the genetic basis for this variation is poorly understood and a mixed ESS for fighting can be interpreted in more than one way. Specifically, we do not know whether variation in aggression within a population arises from among-individual differences in fixed strategy (determined by an individual's genotype-direct genetic effects [DGEs]), or from within-individual variation in strategy across contests. Furthermore, as suggested by developments of the original Hawk-Dove model, within-individual variation in strategy may be dependent on the phenotype and thus genotype of the opponent (indirect genetic effects-IGEs). Here we test for the effect of DGEs and IGEs during fights in the beadlet sea anemone Actinia equina. By exploiting the unusual reproductive system of sea anemones, combined with new molecular data, we investigate the role of both additive (DGE + IGE) and non-additive (DGE × IGE) genetic effects on fighting parameters, the latter of which have been hypothesized but never tested for explicitly. We find evidence for heritable variation in fighting ability and that fight duration increases with relatedness. Fighting success is influenced additively by DGEs and IGEs but we found no evidence for non-additive IGEs. These results indicate that variation in fighting behavior is driven by additive indirect genetic effects (DGE + IGE), and support a core assumption of contest theory that strategies are fixed by DGEs.
Collapse
Affiliation(s)
- Sarah M Lane
- School of Biological and Marine Sciences, Animal Behaviour Research Group, University of Plymouth, Plymouth, Devon, UK
| | - Alastair J Wilson
- Centre for Ecology and Conservation, University of Exeter (Penryn Campus), Cornwall, UK
| | - Mark Briffa
- School of Biological and Marine Sciences, Animal Behaviour Research Group, University of Plymouth, Plymouth, Devon, UK
| |
Collapse
|
17
|
Trubenová B, Hager R. Green beards in the light of indirect genetic effects. Ecol Evol 2019; 9:9597-9608. [PMID: 31534678 PMCID: PMC6745669 DOI: 10.1002/ece3.5484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 06/26/2019] [Accepted: 07/02/2019] [Indexed: 11/14/2022] Open
Abstract
The green-beard effect is one proposed mechanism predicted to underpin the evolution of altruistic behavior. It relies on the recognition and the selective help of altruists to each other in order to promote and sustain altruistic behavior. However, this mechanism has often been dismissed as unlikely or uncommon, as it is assumed that both the signaling trait and altruistic trait need to be encoded by the same gene or through tightly linked genes. Here, we use models of indirect genetic effects (IGEs) to find the minimum correlation between the signaling and altruistic trait required for the evolution of the latter. We show that this correlation threshold depends on the strength of the interaction (influence of the green beard on the expression of the altruistic trait), as well as the costs and benefits of the altruistic behavior. We further show that this correlation does not necessarily have to be high and support our analytical results by simulations.
Collapse
Affiliation(s)
| | - Reinmar Hager
- Evolution and Genomic Systems, School of Biological Sciences, Manchester Academic Health Science Center, Faculty of Biology, Medicine and HealthThe University of ManchesterManchesterUK
- Present address:
Computational and Evolutionary Biology, Faculty of Life SciencesMichael Smith BuildingManchesterUK
| |
Collapse
|
18
|
Fisher DN, Wilson AJ, Boutin S, Dantzer B, Lane JE, Coltman DW, Gorrell JC, McAdam AG. Social effects of territorial neighbours on the timing of spring breeding in North American red squirrels. J Evol Biol 2019; 32:559-571. [DOI: 10.1111/jeb.13437] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 02/25/2019] [Accepted: 03/01/2019] [Indexed: 02/06/2023]
Affiliation(s)
- David N. Fisher
- Department for Integrative Biology University of Guelph Guelph Ontario Canada
- Department of Psychology, Neuroscience & Behaviour McMaster University Hamilton Ontario Canada
| | - Alastair J. Wilson
- Centre for Ecology and Conservation University of Exeter Penryn Cornwall UK
| | - Stan Boutin
- Department of Biological Sciences University of Alberta Edmonton Alberta Canada
| | - Ben Dantzer
- Department of Psychology University of Michigan Ann Arbour Michigan
- Department of Ecology and Evolutionary Biology University of Michigan Ann Arbour Michigan
| | - Jeffrey E. Lane
- Department of Biology University of Saskatchewan Saskatoon Saskatchewan Canada
| | - David W. Coltman
- Department of Biological Sciences University of Alberta Edmonton Alberta Canada
| | - Jamie C. Gorrell
- Biology Department University of Vancouver Island Nanaimo British Columbia Canada
| | - Andrew G. McAdam
- Department for Integrative Biology University of Guelph Guelph Ontario Canada
| |
Collapse
|
19
|
Fisher DN, Pruitt JN. Opposite responses to selection and where to find them. J Evol Biol 2019; 32:505-518. [PMID: 30807674 DOI: 10.1111/jeb.13432] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 02/17/2019] [Accepted: 02/22/2019] [Indexed: 01/22/2023]
Abstract
We generally expect traits to evolve in the same direction as selection. However, many organisms possess traits that appear to be costly for individuals, while plant and animal breeding experiments reveal that selection may lead to no response or even negative responses to selection. We formalize both of these instances as cases of "opposite responses to selection." Using quantitative genetic models for the response to selection, we outline when opposite responses to selection should be expected. These typically occur when social selection opposes direct selection, when individuals interact with others less related to them than a random member of the population, and if the genetic covariance between direct and indirect effects is negative. We discuss the likelihood of each of these occurring in nature and therefore summarize how frequent opposite responses to selection are likely to be. This links several evolutionary phenomena within a single framework.
Collapse
Affiliation(s)
- David N Fisher
- Department of Psychology, Neuroscience & Behaviour, McMaster University, Hamilton, Ontario, Canada
| | - Jonathan N Pruitt
- Department of Psychology, Neuroscience & Behaviour, McMaster University, Hamilton, Ontario, Canada
| |
Collapse
|
20
|
Carter MJ, Wilson AJ, Moore AJ, Royle NJ. The role of indirect genetic effects in the evolution of interacting reproductive behaviors in the burying beetle, Nicrophorus vespilloides. Ecol Evol 2019; 9:998-1009. [PMID: 30805136 PMCID: PMC6374716 DOI: 10.1002/ece3.4731] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 10/22/2018] [Accepted: 10/24/2018] [Indexed: 11/07/2022] Open
Abstract
Social interactions can give rise to indirect genetic effects (IGEs), which occur when genes expressed in one individual affect the phenotype of another individual. The evolutionary dynamics of traits can be altered when there are IGEs. Sex often involves indirect effects arising from first-order (current) or second-order (prior) social interactions, yet IGEs are infrequently quantified for reproductive behaviors. Here, we use experimental populations of burying beetles that have experienced bidirectional selection on mating rate to test for social plasticity and IGEs associated with focal males mating with a female either without (first-order effect) or with (second-order effect) prior exposure to a competitor, and resource defense behavior (first-order effect). Additive IGEs were detected for mating rate arising from (first-order) interactions with females. For resource defense behavior, a standard variance partitioning analysis provided no evidence of additive genetic variance-either direct or indirect. However, behavior was predicted by focal size relative to that of the competitor, and size is also heritable. Assuming that behavior is causally dependent on relative size, this implies that both DGEs and IGEs do occur (and may potentially interact). The relative contribution of IGEs may differ among social behaviors related to mating which has consequences for the evolutionary trajectories of multivariate traits.
Collapse
Affiliation(s)
- Mauricio J. Carter
- Centre for Ecology and ConservationUniversity of ExeterPenrynUK
- Present address:
Departamento de Ecología y Biodiversidad, Facultad de Ciencias de la VidaUniversidad Andrés BelloRepública 440SantiagoChile
| | | | - Allen J. Moore
- Centre for Ecology and ConservationUniversity of ExeterPenrynUK
- Present address:
Department of EntomologyCollege of Agricultural and Environmental SciencesUniversity of GeorgiaAthensGA30602‐7503USA
| | - Nick J. Royle
- Centre for Ecology and ConservationUniversity of ExeterPenrynUK
| |
Collapse
|
21
|
Fisher DN, McAdam AG. Indirect genetic effects clarify how traits can evolve even when fitness does not. Evol Lett 2019. [DOI: 10.1002/evl3.98] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Affiliation(s)
- David N. Fisher
- Department of Integrative Biology; University of Guelph; 50 Stone Road East, Guelph Ontario N1G 2W1 Canada
- Current Address: Department of Psychology, Neuroscience & Behaviour; McMaster University; 1280 Main Street West Hamilton Ontario L8S 4K1 Canada
| | - Andrew G. McAdam
- Department of Integrative Biology; University of Guelph; 50 Stone Road East, Guelph Ontario N1G 2W1 Canada
| |
Collapse
|
22
|
Han CS, Tuni C, Ulcik J, Dingemanse NJ. Increased developmental density decreases the magnitude of indirect genetic effects expressed during agonistic interactions in an insect. Evolution 2018; 72:2435-2448. [PMID: 30221347 DOI: 10.1111/evo.13600] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 08/07/2018] [Accepted: 08/28/2018] [Indexed: 12/19/2022]
Abstract
The expression of aggression depends not only on the direct genetic effects (DGEs) of an individual's genes on its own behavior, but also on indirect genetic effects (IGEs) caused by heritable phenotypes expressed by social partners. IGEs can affect the amount of heritable variance on which selection can act. Despite the important roles of IGEs in the evolutionary process, it remains largely unknown whether the strength of IGEs varies across life stages or competitive regimes. Based on manipulations of nymphal densities and > 3000 pair-wise aggression tests across multiple life stages, we experimentally demonstrate that IGEs on aggression are stronger in field crickets (Gryllus bimaculatus) that develop at lower densities than in those that develop at higher densities, and that these effects persist with age. The existence of density-dependent IGEs implies that social interactions strongly determine the plastic expression of aggression when competition for resources is relaxed. A more competitive (higher density) rearing environment may fail to provide crickets with sufficient resources to develop social cognition required for strong IGEs. The contribution of IGEs to evolutionary responses was greater at lower densities. Our study thereby demonstrates the importance of considering IGEs in density-dependent ecological and evolutionary processes.
Collapse
Affiliation(s)
- Chang S Han
- Behavioural Ecology, Department of Biology, Ludwig-Maximilians University of Munich, Planegg-Martinsried, Germany.,Current Address: School of Biological Sciences, Seoul National University, Seoul, Korea
| | - Cristina Tuni
- Behavioural Ecology, Department of Biology, Ludwig-Maximilians University of Munich, Planegg-Martinsried, Germany
| | - Jakob Ulcik
- Behavioural Ecology, Department of Biology, Ludwig-Maximilians University of Munich, Planegg-Martinsried, Germany
| | - Niels J Dingemanse
- Behavioural Ecology, Department of Biology, Ludwig-Maximilians University of Munich, Planegg-Martinsried, Germany
| |
Collapse
|
23
|
Fokkema RW, Ubels R, Both C, de Felici L, Tinbergen JM. Reproductive effort and future parental competitive ability: A nest box removal experiment. Ecol Evol 2018; 8:8865-8879. [PMID: 30271551 PMCID: PMC6157679 DOI: 10.1002/ece3.4342] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 06/05/2018] [Accepted: 06/13/2018] [Indexed: 11/08/2022] Open
Abstract
The life history trade-off between current and future reproduction is a theoretically well-established concept. However, empirical evidence for the occurrence of a fitness cost of reproduction is mixed. Evidence indicates that parents only pay a cost of reproduction when local competition is high. In line with this, recent experimental work on a small passerine bird, the Great tit (Parus major) showed that reproductive effort negatively affected the competitive ability of parents, estimated through competition for high quality breeding sites in spring. In the current study, we further investigate the negative causal relationship between reproductive effort and future parental competitive ability, with the aim to quantify the consequences for parental fitness, when breeding sites are scarce. To this end, we (a) manipulated the family size of Great tit parents and (b) induced severe competition for nest boxes among the parents just before the following breeding season by means of a large-scale nest box removal experiment. Parents increased their feeding effort in response to our family size manipulation and we successfully induced competition among the parents the following spring. Against our expectation, we found no effect of last season's family size on the ability of parents to secure a scarce nest box for breeding. In previous years, if detected, the survival cost of reproduction was always paid after midwinter. In this year, parents did pay a survival cost of reproduction before midwinter and thus before the onset of the experiment in early spring. Winter food availability during our study year was exceptionally low, and thus, competition in early winter may have been extraordinarily high. We hypothesize that differences in parental competitive ability due to their previous reproductive effort might have played a role, but before the onset of our experiment and resulted in the payment of the survival cost of reproduction.
Collapse
Affiliation(s)
- Rienk W. Fokkema
- Conservation Ecology GroupGroningen Institute for Evolutionary Life Sciences (GELIFES)University of GroningenGroningenThe Netherlands
- Evolutionary BiologyBielefeld UniversityBielefeldGermany
- Department of Animal BehaviourBielefeld UniversityBielefeldGermany
| | - Richard Ubels
- Conservation Ecology GroupGroningen Institute for Evolutionary Life Sciences (GELIFES)University of GroningenGroningenThe Netherlands
| | - Christiaan Both
- Conservation Ecology GroupGroningen Institute for Evolutionary Life Sciences (GELIFES)University of GroningenGroningenThe Netherlands
| | - Livia de Felici
- Conservation Ecology GroupGroningen Institute for Evolutionary Life Sciences (GELIFES)University of GroningenGroningenThe Netherlands
| | - Joost M. Tinbergen
- Conservation Ecology GroupGroningen Institute for Evolutionary Life Sciences (GELIFES)University of GroningenGroningenThe Netherlands
| |
Collapse
|
24
|
Pujol B, Blanchet S, Charmantier A, Danchin E, Facon B, Marrot P, Roux F, Scotti I, Teplitsky C, Thomson CE, Winney I. The Missing Response to Selection in the Wild. Trends Ecol Evol 2018; 33:337-346. [PMID: 29628266 PMCID: PMC5937857 DOI: 10.1016/j.tree.2018.02.007] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 02/26/2018] [Accepted: 02/28/2018] [Indexed: 01/28/2023]
Abstract
Although there are many examples of contemporary directional selection, evidence for responses to selection that match predictions are often missing in quantitative genetic studies of wild populations. This is despite the presence of genetic variation and selection pressures – theoretical prerequisites for the response to selection. This conundrum can be explained by statistical issues with accurate parameter estimation, and by biological mechanisms that interfere with the response to selection. These biological mechanisms can accelerate or constrain this response. These mechanisms are generally studied independently but might act simultaneously. We therefore integrated these mechanisms to explore their potential combined effect. This has implications for explaining the apparent evolutionary stasis of wild populations and the conservation of wildlife. Recent discoveries at the intersection of quantitative genetics and evolutionary ecology are challenging our views on the potential of wild populations to respond to selection. Multiple biological mechanisms can disconnect genetic variation from the response to selection in the wild. We highlight areas for future research. We provide an integrative framework that can be used to qualitatively assess the combined influence of these mechanisms on the response to selection.
Collapse
Affiliation(s)
- Benoit Pujol
- Laboratoire Évolution & Diversité Biologique (EDB UMR 5174), Université Fédérale de Toulouse Midi-Pyrénées, CNRS, IRD, UPS, 31062 Toulouse, France; Groupement de Recherche de l'Institut Ecologie et Environnement 6448, Génétique Quantitative dans les Populations Naturelles (GQPN), c/o EDB, 31062 Toulouse, France.
| | - Simon Blanchet
- Laboratoire Évolution & Diversité Biologique (EDB UMR 5174), Université Fédérale de Toulouse Midi-Pyrénées, CNRS, IRD, UPS, 31062 Toulouse, France; Station d'Ecologie Théorique Expérimentale (SETE), CNRS UMR 5321, Université Paul Sabatier, 09200 Moulis, France; Groupement de Recherche de l'Institut Ecologie et Environnement 6448, Génétique Quantitative dans les Populations Naturelles (GQPN), c/o EDB, 31062 Toulouse, France
| | - Anne Charmantier
- Centre d'Ecologie Fonctionnelle et Evolutive (CEFE), CNRS UMR 5175, 34293 Montpellier, France; Département des Sciences Biologiques, Université du Québec à Montréal, CP 888 Succursale Centre-Ville, H3P 3P8 QC, Canada; Groupement de Recherche de l'Institut Ecologie et Environnement 6448, Génétique Quantitative dans les Populations Naturelles (GQPN), c/o EDB, 31062 Toulouse, France
| | - Etienne Danchin
- Laboratoire Évolution & Diversité Biologique (EDB UMR 5174), Université Fédérale de Toulouse Midi-Pyrénées, CNRS, IRD, UPS, 31062 Toulouse, France; Groupement de Recherche de l'Institut Ecologie et Environnement 6448, Génétique Quantitative dans les Populations Naturelles (GQPN), c/o EDB, 31062 Toulouse, France
| | - Benoit Facon
- UMR Peuplements Végétaux et Bioagresseurs en Milieu Tropical (PVBMT), Institut National de la Recherche Agronomique (INRA), Saint Pierre, Réunion, France; Groupement de Recherche de l'Institut Ecologie et Environnement 6448, Génétique Quantitative dans les Populations Naturelles (GQPN), c/o EDB, 31062 Toulouse, France
| | - Pascal Marrot
- Laboratoire Évolution & Diversité Biologique (EDB UMR 5174), Université Fédérale de Toulouse Midi-Pyrénées, CNRS, IRD, UPS, 31062 Toulouse, France; Groupement de Recherche de l'Institut Ecologie et Environnement 6448, Génétique Quantitative dans les Populations Naturelles (GQPN), c/o EDB, 31062 Toulouse, France
| | - Fabrice Roux
- Laboratoire des Interactions Plantes-Microorganismes (LIPM), INRA, CNRS, Université de Toulouse, 31326 Castanet-Tolosan, France; Groupement de Recherche de l'Institut Ecologie et Environnement 6448, Génétique Quantitative dans les Populations Naturelles (GQPN), c/o EDB, 31062 Toulouse, France
| | - Ivan Scotti
- INRA Unité de Recherche 0629 Ecologie des Forêts Méditerranéennes, 84914 Avignon, France; Groupement de Recherche de l'Institut Ecologie et Environnement 6448, Génétique Quantitative dans les Populations Naturelles (GQPN), c/o EDB, 31062 Toulouse, France
| | - Céline Teplitsky
- Centre d'Ecologie Fonctionnelle et Evolutive (CEFE), CNRS UMR 5175, 34293 Montpellier, France; Muséum National d'Histoire Naturelle, CNRS UMR 7204 Centre d'Écologie et des Sciences de la Conservation (CESCO), 75005 Paris, France; Groupement de Recherche de l'Institut Ecologie et Environnement 6448, Génétique Quantitative dans les Populations Naturelles (GQPN), c/o EDB, 31062 Toulouse, France
| | - Caroline E Thomson
- Laboratoire Évolution & Diversité Biologique (EDB UMR 5174), Université Fédérale de Toulouse Midi-Pyrénées, CNRS, IRD, UPS, 31062 Toulouse, France; Groupement de Recherche de l'Institut Ecologie et Environnement 6448, Génétique Quantitative dans les Populations Naturelles (GQPN), c/o EDB, 31062 Toulouse, France
| | - Isabel Winney
- Laboratoire Évolution & Diversité Biologique (EDB UMR 5174), Université Fédérale de Toulouse Midi-Pyrénées, CNRS, IRD, UPS, 31062 Toulouse, France; Groupement de Recherche de l'Institut Ecologie et Environnement 6448, Génétique Quantitative dans les Populations Naturelles (GQPN), c/o EDB, 31062 Toulouse, France
| |
Collapse
|
25
|
Hastings KK, Jemison LA, Pendleton GW. Survival of adult Steller sea lions in Alaska: senescence, annual variation and covariation with male reproductive success. ROYAL SOCIETY OPEN SCIENCE 2018; 5:170665. [PMID: 29410794 PMCID: PMC5792871 DOI: 10.1098/rsos.170665] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 12/01/2017] [Indexed: 06/07/2023]
Abstract
Population dynamics of long-lived vertebrates depend critically on adult survival, yet factors affecting survival and covariation between survival and other vital rates in adults remain poorly examined for many taxonomic groups of long-lived mammals (e.g. actuarial senescence has been examined for only 9 of 34 extant pinniped species using longitudinal data). We used mark-recapture models and data from 2795 Steller sea lion (Eumetopias jubatus) pups individually marked at four of five rookeries in southeastern Alaska (SEAK) and resighted for 21 years to examine senescence, annual variability and covariation among life-history traits in this long-lived, sexually dimorphic pinniped. Sexes differed in age of onset (approx. 16-17 and approx. 8-9 years for females and males, respectively), but not rate (-0.047 and -0.046/year of age for females and males) of senescence. Survival of adult males from northern SEAK had greatest annual variability (approx. ±0.30 among years), whereas survival of adult females ranged approximately ±0.10 annually. Positive covariation between male survival and reproductive success was observed. Survival of territorial males was 0.20 higher than that of non-territorial males, resulting in the majority of males alive at oldest ages being territorial.
Collapse
Affiliation(s)
- Kelly K. Hastings
- Alaska Department of Fish and Game, Division of Wildlife Conservation, PO Box 115526, Juneau, AK 99811, USA
| | | | | |
Collapse
|
26
|
Kruuk LEB, Wilson AJ. The challenge of estimating indirect genetic effects on behavior: a comment on Bailey et al. Behav Ecol 2017. [DOI: 10.1093/beheco/arx162] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
27
|
Boulton K, Walling CA, Grimmer AJ, Rosenthal GG, Wilson AJ. Phenotypic and genetic integration of personality and growth under competition in the sheepshead swordtail, Xiphophorus birchmanni. Evolution 2017; 72:187-201. [PMID: 29148573 PMCID: PMC5814916 DOI: 10.1111/evo.13398] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 10/31/2017] [Accepted: 11/01/2017] [Indexed: 01/11/2023]
Abstract
Competition for resources including food, physical space, and potential mates is a fundamental ecological process shaping variation in individual phenotype and fitness. The evolution of competitive ability, in particular social dominance, depends on genetic (co)variation among traits causal (e.g., behavior) or consequent (e.g., growth) to competitive outcomes. If dominance is heritable, it will generate both direct and indirect genetic effects (IGE) on resource‐dependent traits. The latter are expected to impose evolutionary constraint because winners necessarily gain resources at the expense of losers. We varied competition in a population of sheepshead swordtails, Xiphophorus birchmanni, to investigate effects on behavior, size, growth, and survival. We then applied quantitative genetic analyses to determine (i) whether competition leads to phenotypic and/or genetic integration of behavior with life history and (ii) the potential for IGE to constrain life history evolution. Size, growth, and survival were reduced at high competition. Male dominance was repeatable and dominant individuals show higher growth and survival. Additive genetic contributions to phenotypic covariance were significant, with the G matrix largely recapitulating phenotypic relationships. Social dominance has a low but significant heritability and is strongly genetically correlated with size and growth. Assuming causal dependence of growth on dominance, hidden IGE will therefore reduce evolutionary potential.
Collapse
Affiliation(s)
- Kay Boulton
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian EH25 9RG, United Kingdom
| | - Craig A Walling
- Institute of Evolutionary Biology, University of Edinburgh, Ashworth Laboratories, Edinburgh EH9 3FL, United Kingdom
| | - Andrew J Grimmer
- Marine Biology and Ecology Research Centre, School of Biology and Marine Sciences, Plymouth University, Drake Circus, Plymouth, Devon PL48AA, United Kingdom
| | - Gil G Rosenthal
- Department of Biology, Texas A&M University, 3258 TAMU, College Station, Texas 77843.,Centro de Investigaciones Científicas de las Huastecas "Aguazarca,", Calnali, Hidalgo, Mexico
| | - Alastair J Wilson
- Centre for Ecology and Conservation, Biosciences, College of Life and Environmental Sciences, University of Exeter, Cornwall Campus, Penryn, Cornwall TR10 9EZ, United Kingdom
| |
Collapse
|
28
|
Fisher DN, McAdam AG. Social traits, social networks and evolutionary biology. J Evol Biol 2017; 30:2088-2103. [DOI: 10.1111/jeb.13195] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 10/08/2017] [Accepted: 10/12/2017] [Indexed: 01/20/2023]
Affiliation(s)
- D. N. Fisher
- Department for Integrative Biology; University of Guelph; Guelph Ontario Canada
| | - A. G. McAdam
- Department for Integrative Biology; University of Guelph; Guelph Ontario Canada
| |
Collapse
|
29
|
Winney IS, Schroeder J, Nakagawa S, Hsu YH, Simons MJP, Sánchez-Tójar A, Mannarelli ME, Burke T. Heritability and social brood effects on personality in juvenile and adult life-history stages in a wild passerine. J Evol Biol 2017; 31:75-87. [PMID: 29044885 DOI: 10.1111/jeb.13197] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 10/11/2017] [Indexed: 11/30/2022]
Abstract
How has evolution led to the variation in behavioural phenotypes (personalities) in a population? Knowledge of whether personality is heritable, and to what degree it is influenced by the social environment, is crucial to understanding its evolutionary significance, yet few estimates are available from natural populations. We tracked three behavioural traits during different life-history stages in a pedigreed population of wild house sparrows. Using a quantitative genetic approach, we demonstrated heritability in adult exploration, and in nestling activity after accounting for fixed effects, but not in adult boldness. We did not detect maternal effects on any traits, but we did detect a social brood effect on nestling activity. Boldness, exploration and nestling activity in this population did not form a behavioural syndrome, suggesting that selection could act independently on these behavioural traits in this species, although we found no consistent support for phenotypic selection on these traits. Our work shows that repeatable behaviours can vary in their heritability and that social context influences personality traits. Future efforts could separate whether personality traits differ in heritability because they have served specific functional roles in the evolution of the phenotype or because our concept of personality and the stability of behaviour needs to be revised.
Collapse
Affiliation(s)
- I S Winney
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield, UK
| | - J Schroeder
- Evolutionary Biology, Max Planck Institute for Ornithology, Seewiesen, Germany
| | - S Nakagawa
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield, UK.,Department of Zoology, University of Otago, Dunedin, New Zealand.,Evolution & Ecology Research Centre and School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, Australia
| | - Y-H Hsu
- Department of Zoology, University of Otago, Dunedin, New Zealand
| | - M J P Simons
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield, UK
| | - A Sánchez-Tójar
- Evolutionary Biology, Max Planck Institute for Ornithology, Seewiesen, Germany
| | - M-E Mannarelli
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield, UK
| | - T Burke
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield, UK
| |
Collapse
|
30
|
Lodjak J, Mänd R, Mägi M. Insulin‐like growth factor 1 and life‐history evolution of passerine birds. Funct Ecol 2017. [DOI: 10.1111/1365-2435.12993] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jaanis Lodjak
- Department of ZoologyInstitute of Ecology and Earth SciencesUniversity of Tartu Tartu Estonia
| | - Raivo Mänd
- Department of ZoologyInstitute of Ecology and Earth SciencesUniversity of Tartu Tartu Estonia
| | - Marko Mägi
- Department of ZoologyInstitute of Ecology and Earth SciencesUniversity of Tartu Tartu Estonia
| |
Collapse
|
31
|
Chapuis E, Lamy T, Pointier JP, Juillet N, Ségard A, Jarne P, David P. Bioinvasion Triggers Rapid Evolution of Life Histories in Freshwater Snails. Am Nat 2017; 190:694-706. [PMID: 29053358 DOI: 10.1086/693854] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Biological invasions offer interesting situations for observing how novel interactions between closely related, formerly allopatric species may trigger phenotypic evolution in situ. Assuming that successful invaders are usually filtered to be competitively dominant, invasive and native species may follow different trajectories. Natives may evolve traits that minimize the negative impact of competition, while trait shifts in invasives should mostly reflect expansion dynamics, through selection for colonization ability and transiently enhanced mutation load at the colonization front. These ideas were tested through a large-scale common-garden experiment measuring life-history traits in two closely related snail species, one invasive and one native, co-occurring in a network of freshwater ponds in Guadeloupe. We looked for evidence of recent evolution by comparing uninvaded or recently invaded sites with long-invaded ones. The native species adopted a life history favoring rapid population growth (i.e., increased fecundity, earlier reproduction, and increased juvenile survival) that may increase its prospects of coexistence with the more competitive invader. We discuss why these effects are more likely to result from genetic change than from maternal effects. The invader exhibited slightly decreased overall performances in recently colonized sites, consistent with a moderate expansion load resulting from local founder effects. Our study highlights a rare example of rapid life-history evolution following invasion.
Collapse
|
32
|
Indirect genetic effects: a key component of the genetic architecture of behaviour. Sci Rep 2017; 7:10235. [PMID: 28860450 PMCID: PMC5578976 DOI: 10.1038/s41598-017-08258-6] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Accepted: 07/10/2017] [Indexed: 11/22/2022] Open
Abstract
Behavioural ecology research increasingly focuses on why genetic behavioural variation can persist despite selection. Evolutionary theory predicts that directional selection leads to evolutionary change while depleting standing genetic variation. Nevertheless, evolutionary stasis may occur for traits involved in social interactions. This requires tight negative genetic correlations between direct genetic effects (DGEs) of an individual’s genes on its own phenotype and the indirect genetic effects (IGEs) it has on conspecifics, as this could diminish the amount of genetic variation available to selection to act upon. We tested this prediction using a pedigreed laboratory population of Mediterranean field crickets (Gryllus bimaculatus), in which both exploratory tendency and aggression are heritable. We found that genotypes predisposed to be aggressive (due to DGEs) strongly decreased aggressiveness in opponents (due to IGEs). As a consequence, the variance in total breeding values was reduced to almost zero, implying that IGEs indeed greatly contribute to the occurrence of evolutionary stasis. IGEs were further associated with genetic variation in a non-social behaviour: explorative genotypes elicited most aggression in opponents. These key findings imply that IGEs indeed represent an important overlooked mechanism that can impact evolutionary dynamics of traits under selection.
Collapse
|
33
|
Genetic-based interactions among tree neighbors: identification of the most influential neighbors, and estimation of correlations among direct and indirect genetic effects for leaf disease and growth in Eucalyptus globulus. Heredity (Edinb) 2017; 119:125-135. [PMID: 28561806 DOI: 10.1038/hdy.2017.25] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 03/10/2017] [Accepted: 04/09/2017] [Indexed: 11/08/2022] Open
Abstract
An individual's genes may influence the phenotype of neighboring conspecifics. Such indirect genetic effects (IGEs) are important as they can affect the apparent total heritable variance in a population, and thus the response to selection. We studied these effects in a large, pedigreed population of Eucalyptus globulus using variance component analyses of Mycosphearella leaf disease, diameter growth at age 2 years, and post-infection diameter growth at ages 4 and 8 years. In a novel approach, we initially modeled IGEs using a factor analytic (FA) structure to identify the most influential neighbor positions, with the FA loadings being position-specific regressions on the IGEs. This involved sequentially comparing FA models for the variance-covariance matrices of the direct and indirect effects of each neighbor. We then modeled IGEs as a distance-based, combined effect of the most influential neighbors. This often increased the magnitude and significance of indirect genetic variance estimates relative to using all neighbors. The extension of a univariate IGEs model to bivariate analyses also provided insights into the genetic architecture of this population, revealing that: (1) IGEs arising from increased probability of neighbor infection were not associated with reduced growth of neighbors, despite adverse fitness effects being evident at the direct genetic level; and (2) the strong, genetic-based competitive interactions for growth, established early in stand development, were highly positively correlated over time. Our results highlight the complexities of genetic-based interactions at the multi-trait level due to (co)variances associated with IGEs, and the marked discrepancy occurring between direct and total heritable variances.
Collapse
|
34
|
Schulenburg H, Félix MA. The Natural Biotic Environment of Caenorhabditis elegans. Genetics 2017; 206:55-86. [PMID: 28476862 PMCID: PMC5419493 DOI: 10.1534/genetics.116.195511] [Citation(s) in RCA: 245] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 02/28/2017] [Indexed: 01/05/2023] Open
Abstract
Organisms evolve in response to their natural environment. Consideration of natural ecological parameters are thus of key importance for our understanding of an organism's biology. Curiously, the natural ecology of the model species Caenorhabditis elegans has long been neglected, even though this nematode has become one of the most intensively studied models in biological research. This lack of interest changed ∼10 yr ago. Since then, an increasing number of studies have focused on the nematode's natural ecology. Yet many unknowns still remain. Here, we provide an overview of the currently available information on the natural environment of C. elegans We focus on the biotic environment, which is usually less predictable and thus can create high selective constraints that are likely to have had a strong impact on C. elegans evolution. This nematode is particularly abundant in microbe-rich environments, especially rotting plant matter such as decomposing fruits and stems. In this environment, it is part of a complex interaction network, which is particularly shaped by a species-rich microbial community. These microbes can be food, part of a beneficial gut microbiome, parasites and pathogens, and possibly competitors. C. elegans is additionally confronted with predators; it interacts with vector organisms that facilitate dispersal to new habitats, and also with competitors for similar food environments, including competitors from congeneric and also the same species. Full appreciation of this nematode's biology warrants further exploration of its natural environment and subsequent integration of this information into the well-established laboratory-based research approaches.
Collapse
Affiliation(s)
- Hinrich Schulenburg
- Zoological Institute, Christian-Albrechts Universitaet zu Kiel, 24098 Kiel, Germany
| | - Marie-Anne Félix
- Institut de Biologie de l'Ecole Normale Supérieure, Centre National de la Recherche Scientifique, Institut National de la Santé et de la Recherche Médicale, École Normale Supérieure, L'université de Recherche Paris Sciences et Lettres, 75005, France
| |
Collapse
|
35
|
Zajitschek F, Connallon T. Partitioning of resources: the evolutionary genetics of sexual conflict over resource acquisition and allocation. J Evol Biol 2017; 30:826-838. [DOI: 10.1111/jeb.13051] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 01/15/2017] [Accepted: 01/27/2017] [Indexed: 01/20/2023]
Affiliation(s)
- F. Zajitschek
- Department of Biological Sciences Monash University Clayton Vic. Australia
| | - T. Connallon
- Department of Biological Sciences Monash University Clayton Vic. Australia
| |
Collapse
|
36
|
Fokkema RW, Ubels R, Tinbergen JM. Is parental competitive ability in winter negatively affected by previous springs' family size? Ecol Evol 2017; 7:1410-1420. [PMID: 28261453 PMCID: PMC5330910 DOI: 10.1002/ece3.2752] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 12/19/2016] [Accepted: 12/22/2016] [Indexed: 11/26/2022] Open
Abstract
Reproductive behavior cannot be understood without taking the local level of competition into account. Experimental work in great tits (Parus major) showed that (1) a survival cost of reproduction was paid in environments with high levels of competition during the winter period and (2) experimentally manipulated family size negatively affected the ability of parents to compete for preferred breeding boxes in the next spring. The fact that survival was affected in winter suggests that the competitive ability of parents in winter may also be affected by previous reproductive effort. In this study, we aim to investigate whether (1) such carryover effects of family size on the ability of parents to compete for resources in the winter period occurred and (2) this could explain the occurrence of a survival cost of reproduction under increased competition. During two study years, we manipulated the size of in total 168 great tit broods. Next, in winter, we induced competition among the parents by drastically reducing the availability of roosting boxes in their local environment for one week. Contrary to our expectation, we found no negative effect of family size manipulation on the probability of parents to obtain a roosting box. In line with previous work, we did find that a survival cost of reproduction was paid only in plots in which competition for roosting boxes was shortly increased. Our findings thus add to the scarce experimental evidence that survival cost of reproduction are paid under higher levels of local competition but this could not be linked to a reduced competitive ability of parents in winter.
Collapse
Affiliation(s)
- Rienk W Fokkema
- Conservation Ecology Group Groningen Institute for Evolutionary Life Sciences University of Groningen Groningen The Netherlands
| | - Richard Ubels
- Conservation Ecology Group Groningen Institute for Evolutionary Life Sciences University of Groningen Groningen The Netherlands
| | - Joost M Tinbergen
- Conservation Ecology Group Groningen Institute for Evolutionary Life Sciences University of Groningen Groningen The Netherlands
| |
Collapse
|
37
|
Bentz AB, Becker DJ, Navara KJ. Evolutionary implications of interspecific variation in a maternal effect: a meta-analysis of yolk testosterone response to competition. ROYAL SOCIETY OPEN SCIENCE 2016; 3:160499. [PMID: 28018636 PMCID: PMC5180134 DOI: 10.1098/rsos.160499] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 11/02/2016] [Indexed: 05/02/2023]
Abstract
Competition between conspecifics during the breeding season can result in behavioural and physiological programming of offspring via maternal effects. For birds, in which maternal effects are best studied, it has been claimed that exposure to increased competition causes greater deposition of testosterone into egg yolks, which creates faster growing, more aggressive offspring; such traits are thought to be beneficial for high-competition environments. Nevertheless, not all species show a positive relationship between competitive interactions and yolk testosterone, and an explanation for this interspecific variation is lacking. We here test if the magnitude and direction of maternal testosterone allocated to eggs in response to competition can be explained by life-history traits while accounting for phylogenetic relationships. We performed a meta-analysis relating effect size of yolk testosterone response to competition with species coloniality, nest type, parental effort and mating type. We found that effect size was moderated by coloniality and nest type; colonial species and those with open nests allocate less testosterone to eggs when in more competitive environments. Applying a life-history perspective helps contextualize studies showing little or negative responses of yolk testosterone to competition and improves our understanding of how variation in this maternal effect may have evolved.
Collapse
Affiliation(s)
- Alexandra B. Bentz
- Poultry Science Department, University of Georgia, 203 Poultry Science Building, Athens, GA 30602, USA
| | - Daniel J. Becker
- Odum School of Ecology, University of Georgia, 140 E. Green Street, Athens, GA 30602, USA
| | - Kristen J. Navara
- Poultry Science Department, University of Georgia, 203 Poultry Science Building, Athens, GA 30602, USA
| |
Collapse
|
38
|
Germain RR, Wolak ME, Arcese P, Losdat S, Reid JM. Direct and indirect genetic and fine-scale location effects on breeding date in song sparrows. J Anim Ecol 2016; 85:1613-1624. [PMID: 27448623 DOI: 10.1111/1365-2656.12575] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Accepted: 07/14/2016] [Indexed: 11/30/2022]
Abstract
Quantifying direct and indirect genetic effects of interacting females and males on variation in jointly expressed life-history traits is central to predicting microevolutionary dynamics. However, accurately estimating sex-specific additive genetic variances in such traits remains difficult in wild populations, especially if related individuals inhabit similar fine-scale environments. Breeding date is a key life-history trait that responds to environmental phenology and mediates individual and population responses to environmental change. However, no studies have estimated female (direct) and male (indirect) additive genetic and inbreeding effects on breeding date, and estimated the cross-sex genetic correlation, while simultaneously accounting for fine-scale environmental effects of breeding locations, impeding prediction of microevolutionary dynamics. We fitted animal models to 38 years of song sparrow (Melospiza melodia) phenology and pedigree data to estimate sex-specific additive genetic variances in breeding date, and the cross-sex genetic correlation, thereby estimating the total additive genetic variance while simultaneously estimating sex-specific inbreeding depression. We further fitted three forms of spatial animal model to explicitly estimate variance in breeding date attributable to breeding location, overlap among breeding locations and spatial autocorrelation. We thereby quantified fine-scale location variances in breeding date and quantified the degree to which estimating such variances affected the estimated additive genetic variances. The non-spatial animal model estimated nonzero female and male additive genetic variances in breeding date (sex-specific heritabilities: 0·07 and 0·02, respectively) and a strong, positive cross-sex genetic correlation (0·99), creating substantial total additive genetic variance (0·18). Breeding date varied with female, but not male inbreeding coefficient, revealing direct, but not indirect, inbreeding depression. All three spatial animal models estimated small location variance in breeding date, but because relatedness and breeding location were virtually uncorrelated, modelling location variance did not alter the estimated additive genetic variances. Our results show that sex-specific additive genetic effects on breeding date can be strongly positively correlated, which would affect any predicted rates of microevolutionary change in response to sexually antagonistic or congruent selection. Further, we show that inbreeding effects on breeding date can also be sex specific and that genetic effects can exceed phenotypic variation stemming from fine-scale location-based variation within a wild population.
Collapse
Affiliation(s)
- Ryan R Germain
- Department of Forest and Conservation Sciences, University of British Columbia, 2424 Main Mall, Vancouver, BC, V6T 1Z4, Canada. .,Institute of Biological and Environmental Sciences, School of Biological Sciences, Zoology Building, University of Aberdeen, Tillydrone Avenue, Aberdeen, AB24 2TZ, UK.
| | - Matthew E Wolak
- Institute of Biological and Environmental Sciences, School of Biological Sciences, Zoology Building, University of Aberdeen, Tillydrone Avenue, Aberdeen, AB24 2TZ, UK
| | - Peter Arcese
- Department of Forest and Conservation Sciences, University of British Columbia, 2424 Main Mall, Vancouver, BC, V6T 1Z4, Canada
| | - Sylvain Losdat
- Institute of Biological and Environmental Sciences, School of Biological Sciences, Zoology Building, University of Aberdeen, Tillydrone Avenue, Aberdeen, AB24 2TZ, UK
| | - Jane M Reid
- Institute of Biological and Environmental Sciences, School of Biological Sciences, Zoology Building, University of Aberdeen, Tillydrone Avenue, Aberdeen, AB24 2TZ, UK
| |
Collapse
|
39
|
Araya-Ajoy YG, Kuhn S, Mathot KJ, Mouchet A, Mutzel A, Nicolaus M, Wijmenga JJ, Kempenaers B, Dingemanse NJ. Sources of (co)variation in alternative siring routes available to male great tits (Parus major). Evolution 2016; 70:2308-2321. [PMID: 27470488 DOI: 10.1111/evo.13024] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 06/26/2016] [Accepted: 07/05/2016] [Indexed: 11/29/2022]
Abstract
Males of socially monogamous species can increase their siring success via within-pair and extra-pair fertilizations. In this study, we focused on the different sources of (co)variation between these siring routes, and asked how each contributes to total siring success. We quantified the fertilization routes to siring success, as well as behaviors that have been hypothesized to affect siring success, over a five-year period for a wild population of great tits Parus major. We considered siring success and its fertilization routes as "interactive phenotypes" arising from phenotypic contributions of both members of the social pair. We show that siring success is strongly affected by the fecundity of the social (female) partner. We also demonstrate that a strong positive correlation between extra-pair fertilization success and paternity loss likely constrains the evolution of these two routes. Moreover, we show that more explorative and aggressive males had less extra-pair fertilizations, whereas more explorative females laid larger clutches. This study thus demonstrates that (co)variation in siring routes is caused by multiple factors not necessarily related to characteristics of males. We thereby highlight the importance of acknowledging the multilevel structure of male fertilization routes when studying the evolution of male mating strategies.
Collapse
Affiliation(s)
- Yimen G Araya-Ajoy
- Research Group Evolutionary Ecology of Variation, Max Planck Institute for Ornithology, Seewiesen, Germany. .,Department of Behavioral Ecology and Evolutionary Genetics, Max Planck Institute for Ornithology, Seewiesen, Germany. .,Current Address: Center for Biodiversity Dynamics, Norwegian University of Science and Technology, Trondheim, Norway.
| | - Sylvia Kuhn
- Department of Behavioral Ecology and Evolutionary Genetics, Max Planck Institute for Ornithology, Seewiesen, Germany
| | - Kimberley J Mathot
- Research Group Evolutionary Ecology of Variation, Max Planck Institute for Ornithology, Seewiesen, Germany.,Current Address: Royal Netherlands Institute for Sea Research (NIOZ), Department of Coastal Studies (COS), Utrecht University, Den Burg, Texel, the Netherlands
| | - Alexia Mouchet
- Research Group Evolutionary Ecology of Variation, Max Planck Institute for Ornithology, Seewiesen, Germany
| | - Ariane Mutzel
- Research Group Evolutionary Ecology of Variation, Max Planck Institute for Ornithology, Seewiesen, Germany.,Current Address: Department of Biology, University of Kentucky, Lexington, Kentucky
| | - Marion Nicolaus
- Research Group Evolutionary Ecology of Variation, Max Planck Institute for Ornithology, Seewiesen, Germany.,Current Address: Conservation Ecology Group, Groningen Institute for Evolutionary Life Sciences (GELIFES), University of Groningen, Groningen, the Netherlands
| | - Jan J Wijmenga
- Research Group Evolutionary Ecology of Variation, Max Planck Institute for Ornithology, Seewiesen, Germany
| | - Bart Kempenaers
- Department of Behavioral Ecology and Evolutionary Genetics, Max Planck Institute for Ornithology, Seewiesen, Germany
| | - Niels J Dingemanse
- Research Group Evolutionary Ecology of Variation, Max Planck Institute for Ornithology, Seewiesen, Germany.,Behavioural Ecology, Department of Biology, Ludwig-Maximilians University of Munich, Planegg-Martinsried, Germany
| |
Collapse
|
40
|
Fiegna F, Scheuerl T, Moreno-Letelier A, Bell T, Barraclough TG. Saturating effects of species diversity on life-history evolution in bacteria. Proc Biol Sci 2016; 282:rspb.2015.1794. [PMID: 26378213 PMCID: PMC4614762 DOI: 10.1098/rspb.2015.1794] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Species interactions can play a major role in shaping evolution in new environments. In theory, species interactions can either stimulate evolution by promoting coevolution or inhibit evolution by constraining ecological opportunity. The relative strength of these effects should vary as species richness increases, and yet there has been little evidence for evolution of component species in communities. We evolved bacterial microcosms containing between 1 and 12 species in three different environments. Growth rates and yields of isolates that evolved in communities were lower than those that evolved in monocultures, consistent with recent theory that competition constrains species to specialize on narrower sets of resources. This effect saturated or reversed at higher levels of richness, consistent with theory that directional effects of species interactions should weaken in more diverse communities. Species varied considerably, however, in their responses to both environment and richness levels. Mechanistic models and experiments are now needed to understand and predict joint evolutionary dynamics of species in diverse communities.
Collapse
Affiliation(s)
- Francesca Fiegna
- Department of Life Sciences, Imperial College London, Silwood Park Campus, Ascot, Berkshire SL5 7PY, UK
| | - Thomas Scheuerl
- Department of Life Sciences, Imperial College London, Silwood Park Campus, Ascot, Berkshire SL5 7PY, UK
| | - Alejandra Moreno-Letelier
- Department of Life Sciences, Imperial College London, Silwood Park Campus, Ascot, Berkshire SL5 7PY, UK
| | - Thomas Bell
- Department of Life Sciences, Imperial College London, Silwood Park Campus, Ascot, Berkshire SL5 7PY, UK
| | - Timothy G Barraclough
- Department of Life Sciences, Imperial College London, Silwood Park Campus, Ascot, Berkshire SL5 7PY, UK
| |
Collapse
|
41
|
Fokkema RW, Ubels R, Tinbergen JM. Great tits trade off future competitive advantage for current reproduction. Behav Ecol 2016. [DOI: 10.1093/beheco/arw097] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
42
|
Teunissen AJP, Paffen TFE, Ercolani G, de Greef TFA, Meijer EW. Regulating Competing Supramolecular Interactions Using Ligand Concentration. J Am Chem Soc 2016; 138:6852-60. [DOI: 10.1021/jacs.6b03421] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
| | | | - Gianfranco Ercolani
- Dipartimento
di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, Via della Ricerca Scientifica, 00133 Roma, Italy
| | | | | |
Collapse
|
43
|
Deitloff J, Floyd C, Graham SP. Examining Head-shape Differences and Ecology in Morphologically Similar Salamanders at Their Zone of Contact. COPEIA 2016. [DOI: 10.1643/ce-15-319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
44
|
Boulton K, Rosenthal GG, Grimmer AJ, Walling CA, Wilson AJ. Sex-specific plasticity and genotype × sex interactions for age and size of maturity in the sheepshead swordtail, Xiphophorus birchmanni. J Evol Biol 2016; 29:645-56. [PMID: 26688295 PMCID: PMC5102681 DOI: 10.1111/jeb.12814] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 11/27/2015] [Accepted: 12/10/2015] [Indexed: 11/29/2022]
Abstract
Responses to sexually antagonistic selection are thought to be constrained by the shared genetic architecture of homologous male and female traits. Accordingly, adaptive sexual dimorphism depends on mechanisms such as genotype-by-sex interaction (G×S) and sex-specific plasticity to alleviate this constraint. We tested these mechanisms in a population of Xiphophorus birchmanni (sheepshead swordtail), where the intensity of male competition is expected to mediate intersexual conflict over age and size at maturity. Combining quantitative genetics with density manipulations and analysis of sex ratio variation, we confirm that maturation traits are dimorphic and heritable, but also subject to large G×S. Although cross-sex genetic correlations are close to zero, suggesting sex-linked genes with important effects on growth and maturation are likely segregating in this population, we found less evidence of sex-specific adaptive plasticity. At high density, there was a weak trend towards later and smaller maturation in both sexes. Effects of sex ratio were stronger and putatively adaptive in males but not in females. Males delay maturation in the presence of mature rivals, resulting in larger adult size with subsequent benefit to competitive ability. However, females also delay maturation in male-biased groups, incurring a loss of reproductive lifespan without apparent benefit. Thus, in highly competitive environments, female fitness may be limited by the lack of sex-specific plasticity. More generally, assuming that selection does act antagonistically on male and female maturation traits in the wild, our results demonstrate that genetic architecture of homologous traits can ease a major constraint on the evolution of adaptive dimorphism.
Collapse
Affiliation(s)
- K Boulton
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, UK
| | - G G Rosenthal
- Department of Biology, Texas A&M University, College Station, TX, USA.,Centro de Investigaciones Científicas de las Huastecas 'Aguazarca', Calnali, Hidalgo, Mexico
| | - A J Grimmer
- Centre for Ecology and Conservation, Biosciences, College of Life and Environmental Sciences, University of Exeter, Penryn, Cornwall, UK
| | - C A Walling
- Institute of Evolutionary Biology, University of Edinburgh, Edinburgh, UK
| | - A J Wilson
- Centre for Ecology and Conservation, Biosciences, College of Life and Environmental Sciences, University of Exeter, Penryn, Cornwall, UK
| |
Collapse
|
45
|
White S, Kells T, Wilson A. Metabolism, personality and pace of life in the Trinidadian guppy, Poecilia reticulata. BEHAVIOUR 2016. [DOI: 10.1163/1568539x-00003375] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
While among-individual variation in behaviour, or personality, is common across taxa, its mechanistic underpinnings are poorly understood. The Pace of Life syndrome (POLS) provides one possible explanation for maintenance of personality differences. POLS predicts that metabolic differences will covary with behavioural variation, with high metabolism associated with risk prone behaviour and ‘faster’ life histories (e.g., high growth, early maturation). We used a repeated measures approach, assaying metabolic traits (rate and scope), behaviour and growth to test these predictions in the Trinidadian guppy, Poecilia reticulata. We found that while individuals varied significantly in their behaviour and growth rate, more risk prone individuals did not grow significantly faster. Furthermore, after accounting for body size there was no support for among-individual variation in metabolic traits. Thus, while personality differences are clearly present in this population, they do not covary with metabolism and the POLS framework is not supported.
Collapse
Affiliation(s)
- S.J. White
- Centre for Ecology and Conservation, University of Exeter (Penryn Campus), Treliever Road, Penryn, Cornwall TR10 9FE, UK
| | - T.J. Kells
- Centre for Ecology and Conservation, University of Exeter (Penryn Campus), Treliever Road, Penryn, Cornwall TR10 9FE, UK
| | - A.J. Wilson
- Centre for Ecology and Conservation, University of Exeter (Penryn Campus), Treliever Road, Penryn, Cornwall TR10 9FE, UK
| |
Collapse
|
46
|
Macagno ALM, Beckers OM, Moczek AP. Differentiation of ovarian development and the evolution of fecundity in rapidly diverging exotic beetle populations. JOURNAL OF EXPERIMENTAL ZOOLOGY. PART A, ECOLOGICAL GENETICS AND PHYSIOLOGY 2015; 323:679-88. [PMID: 26300520 DOI: 10.1002/jez.1959] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 07/01/2015] [Accepted: 07/15/2015] [Indexed: 11/06/2022]
Abstract
Fecundity is a fundamental determinant of fitness, yet the proximate developmental and physiological mechanisms that enable its often rapid evolution in natural populations are poorly understood. Here, we investigated two populations of the dung beetle Onthophagus taurus that were established in exotic ranges in the early 1970s. These populations are subject to drastically different levels of resource competition in the field, and have diverged dramatically in female fecundity. Specifically, Western Australian O. taurus experience high levels of resource competition, and exhibit greatly elevated reproductive output compared to beetles from the Eastern US, where resource competition is minimal and female fecundity is low. We compared patterns of ovarian maturation, relative investment into and timing of egg production, and potential trade-offs between ovarian investment and the duration of larval development and adult body size between populations representative of both exotic ranges. We found that the rapid divergence in fecundity between exotic populations is associated with striking differences in several aspects of ovarian development: (1) Western Australian females exhibit accelerated ovarian development, (2) produce more eggs, (3) bigger eggs, and (4) start laying eggs earlier compared to their Eastern US counterparts. At the same time, divergence in ovarian maturation patterns occurred alongside changes in (5) larval developmental time, and (6) adult body size, and (7) mass. Western Australian females take longer to complete larval development and, surprisingly, emerge into smaller yet heavier adults than size-matched Eastern US females. We discuss our results in the context of the evolutionary developmental biology of fecundity in exotic populations.
Collapse
Affiliation(s)
| | - Oliver M Beckers
- Department of Biology, Indiana University, Bloomington, Indiana.,Department of Biological Sciences, Murray State University, Murray, Kentucky
| | - Armin P Moczek
- Department of Biology, Indiana University, Bloomington, Indiana
| |
Collapse
|
47
|
Thornton A, Wilson A. In search of the Darwinian Holy Trinity in cognitive evolution: a comment on Croston et al. Behav Ecol 2015. [DOI: 10.1093/beheco/arv119] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
48
|
Weis AE, Turner KM, Petro B, Austen EJ, Wadgymar SM. Hard and soft selection on phenology through seasonal shifts in the general and social environments: A study on plant emergence time. Evolution 2015; 69:1361-1374. [PMID: 25929822 DOI: 10.1111/evo.12677] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Accepted: 04/14/2015] [Indexed: 11/27/2022]
Abstract
The timing of transition out of one life-history phase determines where in the seasonal succession of environments the next phase is spent. Shifts in the general environment (e.g., seasonal climate) affect the expected fitness for particular transition dates. Variation in transition date also leads to temporal variation in the social environment. For instance, early transition may confer a competitive advantage over later individuals. If so, the social environment will impose frequency- and density-dependent selection components. In effect, the general environment imposes hard selection, whereas the social environment imposes soft selection on phenology. We examined hard and soft selection on seedling emergence time in an experiment on Brassica rapa. In monoculture (uniform social environment), early emergence results in up to a 1.5-fold increase in seed production. In bicultures (heterogeneous social environment), early-emerging plants capitalized on their head start, suppressing their late neighbors and increasing their fitness advantage to as much as 38-fold, depending on density. We devised a novel adaptation of contextual analysis to partition total selection (i.e., cov(ω, z)) into the hard and soft components. Hard and soft components had similar strengths at low density, whereas soft selection was five times stronger than hard at high density.
Collapse
Affiliation(s)
- Arthur E Weis
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario, Canada.,Koffler Scientific Reserve at Jokers Hill, University of Toronto, King Township, Ontario, Canada
| | - Kyle M Turner
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario, Canada.,Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, Massachusetts
| | - Bergita Petro
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario, Canada
| | - Emily J Austen
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario, Canada
| | - Susana M Wadgymar
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario, Canada
| |
Collapse
|
49
|
Niemelä PT, Santostefano F. Social carry-over effects on non-social behavioral variation: mechanisms and consequences. Front Ecol Evol 2015. [DOI: 10.3389/fevo.2015.00049] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
|
50
|
Cornette R, Tresset A, Houssin C, Pascal M, Herrel A. Does bite force provide a competitive advantage in shrews? The case of the greater white-toothed shrew. Biol J Linn Soc Lond 2015. [DOI: 10.1111/bij.12423] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Raphaël Cornette
- UMR 7205 CNRS/MNHN/UPMC/EPHE; ‘Institut de Systématique, Evolution, Biodiversité’, (ISYEB); 45 rue Buffon 75005 Paris France
- UMS CNRS/MNHN 2700; ‘Outils et Méthodes de la Systématique Intégrative’; Muséum National d'Histoire Naturelle; Plate-forme de morphométrie 45 Rue Buffon 75005 Paris France
| | - Anne Tresset
- UMR CNRS/MNHN 7209; ‘Archéozoologie, Archéobotanique: sociétés, pratiques et environnements’; Muséum National d'Histoire Naturelle; 55 rue Buffon case postale 56 75005 Paris France
| | - Céline Houssin
- UMR 7205 CNRS/MNHN/UPMC/EPHE; ‘Institut de Systématique, Evolution, Biodiversité’, (ISYEB); 45 rue Buffon 75005 Paris France
| | - Michel Pascal
- UMR CNRS/INRA - Agrocampus ESE; ‘Écologie et Santé des Écosystèmes, Équipe des Invasions Biologiques’; Campus de Beaulieu - Bâtiment 16A CS 84215 35042 Rennes France
| | - Anthony Herrel
- UMR CNRS/MNHN 7179; ‘Mécanismes adaptatifs: des organismes aux communautés’; Muséum National d'Histoire Naturelle; 57 Rue Cuvier 75231 Paris cedex 05 France
- Evolutionary Morphology of Vertebrates; Ghent University; K.L. Ledeganckstraat 35 B-9000 Gent Belgium
| |
Collapse
|