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Sanmartín-Villar I, Yu X, Cordero-Rivera A. Direct and cross-generational effects of reproduction on fitness and behavioral variability in male-biased environments. Curr Zool 2022. [DOI: 10.1093/cz/zoac045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Population structure determines individuals’ interactions and trade-offs with evolutionary consequences. Male-biased populations increase intrasexual competition and intersexual harassment, reducing female resource acquisition, and thus, resources availability for the following generation. We analyzed direct and cross-generational effects of male harassment in two generations of damselflies (Odonata). We exposed adult females to treatments with different sex-ratio and density (balanced and male-biased) to modify the male harassment level. We analyzed female fecundity, fertility, and number of faecal deposits as an indirect measure of resources acquisition. We studied female flight performance after repeated exposures to males. We analyzed survivorship, development, exploration, thigmotaxis, and feeding latency of larvae produced by the experimental females. In both generations, we analyzed four metrics of behavior: mean value, interindividual differences in plasticity, intra-individual unpredictability, and repeatability. Mating duration increased in male-biased treatment, whereas female resources acquisition and fertility decreased. Females that mated longer showed higher fecundity when they were exposed to balanced treatment, but not if they were exposed to male-biased treatment. Females from the male-biased treatment showed interindividual differences in plasticity and no repeatability in flight performance. Offspring showed balanced sex-ratio and similar survivorship, development, and feeding latency independently of the parental treatment; however, females exposed to male-biased treatment produced offspring with higher differences in exploration plasticity and daughters less explorative and with higher unpredictable thigmotaxis. We propose prolonged copulation as courtship at balanced sex-ratio but a cost to females under male-biased sex-ratio. Cross-generational effects in behavioral variability may be a mechanism to cope with predicted future environments.
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Affiliation(s)
- Iago Sanmartín-Villar
- Universidade de Vigo, ECOEVO Lab, Escola de Enxeñaría Forestal, Campus Universitario A Xunqueira , 36005 Pontevedra, Galiza , Spain
| | - Xin Yu
- Universidade de Vigo, ECOEVO Lab, Escola de Enxeñaría Forestal, Campus Universitario A Xunqueira , 36005 Pontevedra, Galiza , Spain
- College of Life Sciences, Chongqing Normal University , Daxuecheng Middle Rd, Shapingba District, Chongqing 401333 , China
| | - Adolfo Cordero-Rivera
- Universidade de Vigo, ECOEVO Lab, Escola de Enxeñaría Forestal, Campus Universitario A Xunqueira , 36005 Pontevedra, Galiza , Spain
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Viitaniemi HM, Leder EH, Suhonen J. Influence of Interspecific Interference Competition on the Genetic Structure of Calopteryx splendens Populations. ANN ZOOL FENN 2021. [DOI: 10.5735/086.059.0104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
| | - Erica H. Leder
- Department of Biology, FI-20014 University of Turku, Finland
| | - Jukka Suhonen
- Department of Biology, FI-20014 University of Turku, Finland
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Pena-Firme P, Guillermo-Ferreira R. Females of the red damselfly Mnesarete pudica are attracted to more ornamented males and attract rival males. Sci Rep 2020; 10:14320. [PMID: 32868843 PMCID: PMC7458925 DOI: 10.1038/s41598-020-71057-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 08/05/2020] [Indexed: 11/09/2022] Open
Abstract
Male calopterygid damselflies often exhibit colourful wings used during aggressive contests and courtship displays. Evidence suggests that male wing coloration is a secondary sexual character assessed by males and females to identify male quality. In some species, males adopt a lekking strategy, where females visit exhibition arenas and choose the best mate. Here, we addressed whether the behaviour of Mnesarete pudica males is influenced by female visitation when gathering in leks. We hypothesized that female visitation would increase male investment in courtship and fighting, while reducing patrolling flights and harassment attempts. Moreover, we tested the hypothesis that more ornamented males attract more females to the territory, following the hotshot model of lek evolution. Our results suggest that, indeed, males with more pigmented wings attract more visiting females, independently of male size. Our results also show that the number of females in a territory attracts more males and elicits male contest behaviour, reducing male harassment. We conclude that male ornament and male clustering is a good predictor of female visitation rates, suggesting that females may exert mate choice.
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Affiliation(s)
- Paloma Pena-Firme
- LESTES Lab, Hydrobiology Department, Federal University of São Carlos, São Paulo, Brazil
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5
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Jigisha, Iglesias-Carrasco M, Vincent A, Head ML. Disentangling the costs of mating and harassment across different environments. Anim Behav 2020. [DOI: 10.1016/j.anbehav.2020.05.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Córdoba-Aguilar A, Rocha-Ortega M. Damselfly (Odonata: Calopterygidae) Population Decline in an Urbanizing Watershed. JOURNAL OF INSECT SCIENCE (ONLINE) 2019; 19:5523070. [PMID: 31253984 PMCID: PMC6599065 DOI: 10.1093/jisesa/iez063] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Indexed: 06/09/2023]
Abstract
Reduction of terrestrial vegetation and degradation of water quality are among the factors driving insect population decline in growing cities. In this study, we investigated the extent of habitat deterioration, behavioral and physiological responses, and fitness of a damselfly [Hetaerina americana (F.)] population in a semitropical region in central Mexico. The study population was located in a riverine area that crosses a small urban area (Tehuixtla city). We related two habitat variables (tree/shrub covered area and numbers of wastewater outlets) to presumable damselfly responses (larval and adult abundance, duration of adults exposed directly to sunlight, lipid content and muscle mass, and egg survival) over the years 2002 and 2016. We detected a reduction in terrestrial vegetation cover, an increase in wastewater outlets, and a decrease in larval and adult abundance. Adults were more exposed to sunlight in 2016 than in 2002 and showed a reduced lipid content and muscle mass in 2016. Egg survival also decreased. Although correlative, these results suggest impairment of damselfly condition (via lipid and muscle reduction) and fitness as urbanization increases.
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Affiliation(s)
- Alex Córdoba-Aguilar
- Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Apdo. P. 70–275, Circuito Exterior, Ciudad Universitaria, Coyoacán, Distrito Federal, Mexico
| | - Maya Rocha-Ortega
- Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Apdo. P. 70–275, Circuito Exterior, Ciudad Universitaria, Coyoacán, Distrito Federal, Mexico
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7
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Cordero-Rivera A. Sexual conflict and the evolution of genitalia: male damselflies remove more sperm when mating with a heterospecific female. Sci Rep 2017; 7:7844. [PMID: 28798399 PMCID: PMC5552684 DOI: 10.1038/s41598-017-08390-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Accepted: 07/12/2017] [Indexed: 11/09/2022] Open
Abstract
In Calopteryx damselflies, males remove rivals’ sperm stored by the female, thereby reducing sperm competition. This behaviour may create a sexual conflict, because females could lose the sperm stored in the spermatheca, used for long-term storage. Comparative evidence suggested antagonistic coevolution between sexes, which might prompt the evolution of narrow spermathecal ducts, or longer spermathecae, hindering sperm removal. Calopteryx haemorrhoidalis and C. splendens coexist and sometimes hybridize. Therefore, here I predicted that if females coevolve with conspecific males, heterospecific males should have an advantage when interspecific matings occur because females will show less resistance to them than to conspecific males. By hand-pairing females to males of both species, I found that in intraspecific and interspecific matings, sperm was almost completely removed from the bursa (97–100%), but only partially from the spermathecae, with more spermathecal removal in interspecific (63–71%) than intraspecific matings (14–33%). This suggests that heterospecific males are more efficient in sperm removal as predicted by a sexually-antagonistic coevolutionary scenario. Furthermore, in most cases, only the left spermatheca was emptied, suggesting that the evolution of more than one spermatheca might also be a female counter-adaptation to regain control over fertilization.
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Affiliation(s)
- Adolfo Cordero-Rivera
- ECOEVO Lab, Escola de Enxeñaría Forestal, Universidade de Vigo, Campus Universitario, 36005, Pontevedra, Galiza, Spain.
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Phillips A, Reichard M, Smith C. Sex differences in the responses to oviposition site cues by a fish revealed by tests with an artificial host. Anim Behav 2017. [DOI: 10.1016/j.anbehav.2017.02.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Rapkin J, Jensen K, Lane SM, House CM, Sakaluk SK, Hunt J. Macronutrient intake regulates sexual conflict in decorated crickets. J Evol Biol 2015; 29:395-406. [PMID: 26563682 DOI: 10.1111/jeb.12794] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Accepted: 11/06/2015] [Indexed: 11/30/2022]
Abstract
Sexual conflict results in a diversity of sex-specific adaptations, including chemical additions to ejaculates. Male decorated crickets (Gryllodes sigillatus) produce a gelatinous nuptial gift (the spermatophylax) that varies in size and free amino acid composition, which influences a female's willingness to fully consume this gift. Complete consumption of this gift maximizes sperm transfer through increased retention of the sperm-containing ampulla, but hinders post-copulatory mate choice. Here, we examine the effects of protein (P) and carbohydrate (C) intake on the weight and amino acid composition of the spermatophylax that describes its gustatory appeal to the female, as well as the ability of this gift to regulate sexual conflict via ampulla attachment time. Nutrient intake had similar effects on the expression of these traits with each maximized at a high intake of nutrients with a P : C ratio of 1 : 1.3. Under dietary choice, males actively regulated their nutrient intake but this regulation did not coincide with the peak of the nutritional landscape for any trait. Our results therefore demonstrate that a balanced intake of nutrients is central to regulating sexual conflict in G. sigillatus, but males are constrained from reaching the optima needed to bias the outcome of this conflict in their favour.
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Affiliation(s)
- J Rapkin
- Centre for Ecology and Conservation, College of Life and Environmental Science, University of Exeter, Penryn, UK
| | - K Jensen
- Centre for Ecology and Conservation, College of Life and Environmental Science, University of Exeter, Penryn, UK.,Department of Entomology, North Carolina State University, Raleigh, NC, USA
| | - S M Lane
- Centre for Ecology and Conservation, College of Life and Environmental Science, University of Exeter, Penryn, UK
| | - C M House
- Centre for Ecology and Conservation, College of Life and Environmental Science, University of Exeter, Penryn, UK
| | - S K Sakaluk
- Centre for Ecology and Conservation, College of Life and Environmental Science, University of Exeter, Penryn, UK.,Behavior, Ecology, Evolution & Systematics Section, School of Biological Sciences, Illinois State University, Normal, IL, USA
| | - J Hunt
- Centre for Ecology and Conservation, College of Life and Environmental Science, University of Exeter, Penryn, UK
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Beatty CD, Andrés JA, Sherratt TN. Conspicuous Coloration in Males of the Damselfly Nehalennia irene (Zygoptera: Coenagrionidae): Do Males Signal Their Unprofitability to Other Males? PLoS One 2015; 10:e0142684. [PMID: 26587979 PMCID: PMC4654565 DOI: 10.1371/journal.pone.0142684] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Accepted: 10/26/2015] [Indexed: 11/19/2022] Open
Abstract
In damselflies, sexual colour dimorphism is commonly explained as a consequence of selection on traits that increase male attractiveness to females. However, while many species in the damselfly family Coenagrionidae (Insecta: Odonata) are sexually dimorphic, the males do not engage in displays, and male competition for mates resembles a “scramble”. An alternative explanation for the sexual differences in coloration within these species is that sexual dimorphism has evolved as a sex-related warning signal, with males signalling their uprofitability as mates to other males, thereby avoiding harassment from conspecifics. We evaluated an underlying assumption of the theory that male-male harassment rate is influenced by colour by comparing harassment of males of the species Nehalennia irene that had been painted to make them appear: (i) similar to an unaltered male (blue), (ii) different from a male (orange) and (iii) more similar to a female (black). When caged together we found that blue-painted males experienced significantly lower harassment than black-painted males. When unpainted males were caged with each type of painted male we found that blue-painted males and the unpainted males housed in the same cages experienced lower rates of harassment than males housed in cages where some males were painted black, suggesting that a single, reliable signal of unprofitability may benefit the individuals that carry it. While our results do not in themselves demonstrate that sexual colour dimorphism originally evolved as an intra-specific warning signal, they do show that harassment is influenced by coloration, and that such selection could conceivably maintain male coloration as a warning signal.
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Affiliation(s)
- Christopher D. Beatty
- Department of Biology, Santa Clara University, 500 El Camino Real, Santa Clara, CA, 95053–0268, United States of America
- Department of Ecology & Evolutionary Biology, Cornell University, E149 Corson Hall, 215 Tower Road, Ithaca, NY, 08053, United States of America
- * E-mail:
| | - José A. Andrés
- Department of Biology, University of Saskatchewan, Saskatoon, Saskatechewan, S7N 0W0, Canada
| | - Thomas N. Sherratt
- Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, ON, K1S 5B6, Canada
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Hassall C, Sherratt TN, Watts PC, Thompson DJ. Live fast, die old: no evidence of reproductive senescence or costs of mating in a damselfly (Odonata: Zygoptera). J Anim Ecol 2015; 84:1542-54. [PMID: 26179139 DOI: 10.1111/1365-2656.12407] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Accepted: 05/18/2015] [Indexed: 11/28/2022]
Abstract
Recent examples of actuarial senescence in wild insect populations have challenged the long-held assumption that the brevity of wild insect life spans precludes senescence. We investigate age-related patterns in mating behaviour in adults of a short-lived damselfly, Coenagrion puella and the implications of this mating. Using capture histories for 1033 individuals over two field seasons, we conduct both pooled and stratified analyses of variations in breeding activity. Pooled analyses suggest that there is strong age-related variation in the probability of being present at the mating rendezvous. However, no age-related variation was observed in the probability of mating. Stratified approaches confirmed a general pattern of age-related declines in survival probability, but provided only equivocal evidence of an effect of age on transition between temporary breeding states. Mating males and females showed greater survival than non-mating individuals, possibly as a consequence of higher body condition. Older males that were not currently breeding were less likely to commence breeding on the next day, but showed no patterns in breeding cessation. Overall, transitions between both breeding states declined with age, suggesting that males that breed tend to continue breeding while those that do not breed continue to be unsuccessful. Female mating rates were consistently high across all ages with no age-related decline apparent. While previous research has demonstrated actuarial senescence in this population, as does this study, we find little evidence of either age-related declines in reproductive behaviour or breeding-related declines in survival, which might indicate functional senescence or costs of mating, respectively. Indeed, the greater survival in mating individuals of both sexes suggests that variations in individual quality may mediate both reproductive success and longevity. Contrary to recent studies, we found no compelling evidence for reproductive senescence or a cost of mating in an important and well-studied model odonate. The possible link between condition and ageing suggests that individual quality needs to be taken into account when studying senescence. We recommend the use of multistrata models for the future investigation of these phenomena.
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Affiliation(s)
| | - Thomas N Sherratt
- Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, K1S 5B6, Canada
| | - Phillip C Watts
- Institute of Integrative Biology, University of Liverpool, Crown Street, Liverpool, L69 7ZB, UK
| | - David J Thompson
- Institute of Integrative Biology, University of Liverpool, Crown Street, Liverpool, L69 7ZB, UK
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Bots J, Iserbyt A, Van Gossum H, Hammers M, Sherratt TN. Frequency-dependent selection on female morphs driven by premating interactions with males. Am Nat 2015; 186:141-50. [PMID: 26098345 DOI: 10.1086/681005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Species showing color polymorphisms-the presence of two or more genetically determined color morphs within a single population-are excellent systems for studying the selective forces driving the maintenance of genetic diversity. Despite a shortage of empirical evidence, it is often suggested that negative frequency-dependent mate preference by males (or diet choice by predators) results in fitness benefits for the rare female morph (or prey type). Moreover, most studies have focused on the male (or predator) behavior in these systems and largely overlooked the importance of female (or prey) resistance behavior. Here, we provide the first explicit test of the role of frequency-dependent and frequency-independent intersexual interactions in female polymorphic damselflies. We identify the stage of the mating sequence when frequency-dependent selection is likely to act by comparing indexes of male mate preference when the female has little (females presented on sticks), moderate (females in cages), and high (females free to fly in the field) ability to avoid male mating attempts. Frequency-dependent male preferences were found only in those experiments where females had little ability to resist male harassment, indicating that premating interactions most likely drive negative frequency-dependent selection in this system. In addition, by separating frequency-dependent male mating preference from the baseline frequency-independent component, we reconcile the seemingly contradictory results of previous studies and highlight the roles of both forms of selection in maintaining the polymorphism at a given equilibrium. We conclude that considering interactions among all players-here, males and females-is crucial to fully understanding the mechanisms underlying the maintenance of genetic polymorphisms in the wild.
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Affiliation(s)
- Jessica Bots
- Evolutionary Ecology Group, University of Antwerp, Antwerp, Belgium
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13
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A mismatch between the perceived fighting signal and fighting ability reveals survival and physiological costs for bearers. PLoS One 2014; 9:e84571. [PMID: 24409304 PMCID: PMC3883682 DOI: 10.1371/journal.pone.0084571] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Accepted: 11/22/2013] [Indexed: 11/25/2022] Open
Abstract
Signals of fighting indicate an animal's intention to attack and so they serve to prevent costly aggressive encounters. However, according to theory, a signal that is different in design (i.e. a novel signal) but that fails to inform fighting intentions will result in negative fitness consequences for the bearer. In the present study we used males of the territorial damselfly Hetaerina americana, which have a red wing spot during territory defense that has evolved as a signal of fighting ability. By producing a novel signal (covering the red spot with blue ink) in territory owners, we investigated: a) the behavioral responses by conspecific males; b) survival cost and c) three physiological mediators of impaired survival: muscular fat reserves, muscle mass and immune ability. We predicted that males with the novel signal would be attacked more often by conspecifics as the former would fail to convey fighting ability and intentions adequately. This will result in lower survival and physiological condition for the novel signal bearers. We found that, compared to control males (males whose red spot was not changed), experimental males had reduced survival, were less able to hold a territory, and had a reduced muscle mass. It seems that spot modified males were not able to effectively communicate their territory tenancy, which may explain why they lost their defended sites. Our results provide support for theoretical models that a novel signal that fails to informing fighting ability may lead to a fitness cost for bearers.
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15
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Wong-Muñoz J, Anderson CN, Munguía-Steyer R, Córdoba-Aguilar A. Body Size and Morph as Drivers of Copulation Duration in a Male Dimorphic Damselfly. Ethology 2013. [DOI: 10.1111/eth.12077] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jesus Wong-Muñoz
- Departamento de Ecología Evolutiva; Instituto de Ecología; Universidad Nacional Autónoma de México; Ciudad Universitaria; México D.F; México
| | | | - Roberto Munguía-Steyer
- Departamento de Ecología Evolutiva; Instituto de Ecología; Universidad Nacional Autónoma de México; Ciudad Universitaria; México D.F; México
| | - Alex Córdoba-Aguilar
- Departamento de Ecología Evolutiva; Instituto de Ecología; Universidad Nacional Autónoma de México; Ciudad Universitaria; México D.F; México
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González‐Tokman DM, González‐Santoyo I, Córdoba‐Aguilar A. Mating success and energetic condition effects driven by terminal investment in territorial males of a short‐lived invertebrate. Funct Ecol 2013. [DOI: 10.1111/1365-2435.12072] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daniel M. González‐Tokman
- Ecología Evolutiva, Instituto de Ecología Universidad Nacional Autónoma de México Apdo. Postal 70‐275, Ciudad Universitaria04510 México D. F México
| | - Isaac González‐Santoyo
- Ecología Evolutiva, Instituto de Ecología Universidad Nacional Autónoma de México Apdo. Postal 70‐275, Ciudad Universitaria04510 México D. F México
| | - Alex Córdoba‐Aguilar
- Ecología Evolutiva, Instituto de Ecología Universidad Nacional Autónoma de México Apdo. Postal 70‐275, Ciudad Universitaria04510 México D. F México
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Sánchez-Guillén RA, Martínez-Zamilpa SMJ, Jiménez-Cortés JG, Forbes MRL, Córdoba-Aguilar A. Maintenance of polymorphic females: do parasites play a role? Oecologia 2012; 171:105-13. [PMID: 22710614 DOI: 10.1007/s00442-012-2388-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2011] [Accepted: 05/24/2012] [Indexed: 10/28/2022]
Abstract
The role of parasites in explaining maintenance of polymorphism is an unexplored research avenue. In odonates, female-limited color polymorphism (one female morph mimicking the conspecific male and one or more gynochromatic morphs) is widespread. Here we investigated whether parasitism contributes to color polymorphism maintenance by studying six species of female dimorphic damselflies using large databases of field-collected animals. We predicted that androchrome females (male mimics) would be more intensively parasitized than gynochrome females which is, according to previous studies, counterbalanced by the advantages of the former when evading male harassment compared to gynochrome females. Here we show that in Ischnura denticollis and Enallagma novahispaniae, androchrome females suffer from a higher degree of parasitism than gynochromatic females, and contrary to prediction, than males. Thus, our study has detected a correlation between color polymorphism and parasitic burden in odonates. This leads us to hypothesize that natural selection, via parasite pressure, can explain in part how androchrome and gynochrome female color morphs can be maintained. Both morphs may cope with parasites in a different way: given that androchrome females are more heavily parasitized, they may pay a higher fecundity costs, in comparison to gynochrome females.
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Affiliation(s)
- R A Sánchez-Guillén
- Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad Universitaria, México, DF, Mexico.
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Jiménez-Cortés JG, Serrano-Meneses MA, Córdoba-Aguilar A. The effects of food shortage during larval development on adult body size, body mass, physiology and developmental time in a tropical damselfly. JOURNAL OF INSECT PHYSIOLOGY 2012; 58:318-326. [PMID: 22085821 DOI: 10.1016/j.jinsphys.2011.11.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Revised: 10/29/2011] [Accepted: 11/02/2011] [Indexed: 05/31/2023]
Abstract
Few studies have looked jointly at the effects of larval stressors on life history and physiology across metamorphosis, especially in tropical insects. Here we investigated how the variation of food availability during the larval stage of the tropical and territorial American rubyspot damselfly (Hetaerina americana) affects adult body size and body mass, and two physiological indicators of condition--phenoloxidase activity (an indicator of immune ability) and protein concentration. We also investigated whether larval developmental time is prolonged when food is scarce, an expected situation for tropical species whose larval time is less constrained, compared to temperate species. Second instar larvae were collected from their natural environments and reared in one of two diet regimes: (i) "rich" provided with five Artemia salina prey every day, and (ii) "poor" provided with two A. salina prey every day. In order to compare how distinct our treatments were from natural conditions, a second set of last-instar larvae were also collected and allowed to emerge. Only body size and phenoloxidase increased in the rich regime, possibly to prioritize investment on sexually selected traits (which increase mating opportunities), and immune ability, given pathogen pressure. The sexes did not differ in body size in relation to food regimes but they did differ in body mass and protein concentration; this can be explained on the basis of the energetically demanding territorial activities by males (for the case of body mass), and female allocation to egg production (for the case of protein). Finally, animals delayed larval development when food was scarce, which is coherent for tropical environments. These findings provide key insights in the role of food availability in a tropical species.
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Affiliation(s)
- J Guillermo Jiménez-Cortés
- Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad Universitaria, México D.F., Mexico
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Iserbyt A, Van Gossum H, Stoks R. Biogeographical survey identifies consistent alternative physiological optima and a minor role for environmental drivers in maintaining a polymorphism. PLoS One 2012; 7:e32648. [PMID: 22384278 PMCID: PMC3287987 DOI: 10.1371/journal.pone.0032648] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2011] [Accepted: 01/28/2012] [Indexed: 11/19/2022] Open
Abstract
The contribution of adaptive mechanisms in maintaining genetic polymorphisms is still debated in many systems. To understand the contribution of selective factors in maintaining polymorphism, we investigated large-scale (>1000 km) geographic variation in morph frequencies and fitness-related physiological traits in the damselfly Nehalennia irene. As fitness-related physiological traits, we investigated investment in immune function (phenoloxidase activity), energy storage and fecundity (abdomen protein and lipid content), and flight muscles (thorax protein content). In the first part of the study, our aim was to identify selective agents maintaining the large-scale spatial variation in morph frequencies. Morph frequencies varied considerably among populations, but, in contrast to expectation, in a geographically unstructured way. Furthermore, frequencies co-varied only weakly with the numerous investigated ecological parameters. This suggests that spatial frequency patterns are driven by stochastic processes, or alternatively, are consequence of highly variable and currently unidentified ecological conditions. In line with this, the investigated ecological parameters did not affect the fitness-related physiological traits differently in both morphs. In the second part of the study, we aimed at identifying trade-offs between fitness-related physiological traits that may contribute to the local maintenance of both colour morphs by defining alternative phenotypic optima, and test the spatial consistency of such trade-off patterns. The female morph with higher levels of phenoloxidase activity had a lower thorax protein content, and vice versa, suggesting a trade-off between investments in immune function and in flight muscles. This physiological trade-off was consistent across the geographical scale studied and supports widespread correlational selection, possibly driven by male harassment, favouring alternative trait combinations in both female morphs.
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Affiliation(s)
- Arne Iserbyt
- Evolutionary Ecology Group, Antwerp University, Antwerp, Belgium.
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Male and female interactions during courtship of the Neotropical damselfly Mnesarete pudica (Odonata: Calopterygidae). Acta Ethol 2012. [DOI: 10.1007/s10211-012-0122-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Gasparini C, Devigili A, Pilastro A. CROSS-GENERATIONAL EFFECTS OF SEXUAL HARASSMENT ON FEMALE FITNESS IN THE GUPPY. Evolution 2011; 66:532-43. [PMID: 22276546 DOI: 10.1111/j.1558-5646.2011.01455.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Clelia Gasparini
- Department of Biology, University of Padova, via U. Bassi 58/B, 35131 Padova, Italy.
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González-Tokman D, Córdoba-Aguilar A, González-Santoyo I, Lanz-Mendoza H. Infection effects on feeding and territorial behaviour in a predatory insect in the wild. Anim Behav 2011. [DOI: 10.1016/j.anbehav.2011.02.027] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Increased guarding duration reduces growth and offspring number in females of the skeleton shrimp Caprella penantis. Anim Behav 2011. [DOI: 10.1016/j.anbehav.2010.12.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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SHERRATT TN, HASSALL C, LAIRD RA, THOMPSON DJ, CORDERO-RIVERA A. A comparative analysis of senescence in adult damselflies and dragonflies (Odonata). J Evol Biol 2011; 24:810-22. [DOI: 10.1111/j.1420-9101.2010.02222.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Munguía-steyer R, Córdoba-aguilar A, Romo-beltrán A. Do individuals in better condition survive for longer? Field survival estimates according to male alternative reproductive tactics and sex. J Evol Biol 2010; 23:175-84. [PMID: 20069722 DOI: 10.1111/j.1420-9101.2009.01894.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
There is a gap in terms of the supposed survival differences recorded in the field according to individual condition. This is partly due to our inability to assess survival in the wild. Here we applied modern statistical techniques to field-gathered data in two damselfly species whose males practice alternative reproductive tactics (ARTs) and whose indicators of condition in both sexes are known. In Paraphlebia zoe, there are two ART: a larger black-winged (BW) male which defends mating territories and a smaller hyaline-winged (HW) male that usually acts as a satellite. In this species, condition in both morphs is correlated with body size. In Calopteryx haemorrhoidalis, males follow tactics according to their condition with males in better condition practicing a territorial ART. In addition, in this species, condition correlates positively with wing pigmentation in both sexes. Our prediction for both species was that males practicing the territorial tactic will survive less longer than males using a nonterritorial tactic, and larger or more pigmented animals will survive for longer. In P. zoe, BW males survived less than females but did not differ from HW males, and not necessarily larger individuals survived for longer. In fact, size affected survival but only when group identity was analysed, showing a positive relationship in females and a slightly negative relationship in both male morphs. For C. haemorrhoidalis, survival was larger for more pigmented males and females, but size was not a good survival predictor. Our results partially confirm assumptions based on the maintenance of ARTs. Our results also indicate that female pigmentation, correlates with a fitness component - survival - as proposed by recent sexual selection ideas applied to females.
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Affiliation(s)
- R Munguía-steyer
- Departamento de Ecologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, SP, Brazil
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Effects of extreme variation in female morph frequencies on the mating behaviour of male damselflies. Behav Ecol Sociobiol 2009. [DOI: 10.1007/s00265-009-0839-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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CÓRDOBA-AGUILAR ALEX. Seasonal variation in genital and body size, sperm displacement ability, female mating rate, and male harassment in two calopterygid damselflies (Odonata: Calopterygidae). Biol J Linn Soc Lond 2009. [DOI: 10.1111/j.1095-8312.2008.01164.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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