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Woldemelak WA. Inbreeding effects on different lineages of Thrips tabaci (Thysanoptera: Thripidae). JOURNAL OF INSECT SCIENCE (ONLINE) 2024; 24:6. [PMID: 38484108 PMCID: PMC10939166 DOI: 10.1093/jisesa/ieae017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 01/25/2024] [Accepted: 02/13/2024] [Indexed: 03/17/2024]
Abstract
Inbreeding can have detrimental effects on reproductive fitness, but the extent of lineage-specific variation in these effects remains poorly understood. This study investigated the effects of brother and sister inbreeding on reproductive fitness in 2 lineages (L1 and T) of T. tabaci. Inbred females from both lineages exhibited a significant reduction in longevity compared with the control group. The L1 lineage experienced a 27% and 43% decrease in longevity in the F2 and F3 generations, respectively, while the T lineage showed a similar trend with a 30% and 44% decrease. The T lineage consistently displayed slightly longer lifespans than the L1 lineage across all generations. Brother and sister inbreeding also led to a decrease in fecundity rates in both lineages. In the F3 generation, the number of eggs laid decreased by 59% compared with the F2 generation. The T lineage consistently exhibited slightly lower fecundity rates compared with the L1 lineage. Egg hatchability rates declined with subsequent inbreeding, with the F3 generation showing lower rates compared with the F2 generation. However, the T lineage did not exhibit a significant difference in inbreeding depression for egg hatchability rates, while the L1 lineage demonstrated a noticeable decrease. Deformities observed in male L1 lineage resulting from inbreeding were consistent with disruptions in normal developmental processes, affecting various body parts such as legs, antennae, and wings. Continued inbreeding increased susceptibility to inbreeding depression in terms of longevity, fecundity, and egg hatchability.
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Affiliation(s)
- Wondimagegn Atilaw Woldemelak
- Department of Horticulture Science, College of Agriculture and Natural Resource Science, Debreberhan University, Debreberhan, Ethiopia
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2
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Patterson C, Pilakouta N. Effects of Parental Care on the Magnitude of Inbreeding Depression: A Meta-Analysis in Fishes. Am Nat 2024; 203:E50-E62. [PMID: 38306289 DOI: 10.1086/728001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2024]
Abstract
AbstractInbreeding results from matings between relatives and often leads to a reduction in the fitness of inbred offspring, known as inbreeding depression. There is substantial variation in the magnitude of inbreeding depression among and within species, driven by differences in the biotic and abiotic environment. Recent studies in three species found that parental care has the potential to buffer against inbreeding depression in the offspring, but the generality of this pattern is still unknown. Here, we performed a meta-analysis to test whether variation in the magnitude of inbreeding depression is related to among-species differences in parental care in fishes. We synthesized 536 effect sizes across 56 studies and 18 species, spanning 47 years of research. We found that inbred offspring suffer a smaller reduction in fitness in species that provide biparental care than in species with uniparental or no care. By using a comparative approach, this study provides novel insights into the capacity of parental care to moderate inbreeding depression and suggests that these effects may currently be underappreciated. Considering the potential effects of parental care on inbreeding depression can help us understand why some species avoid inbreeding, whereas others tolerate or even prefer inbreeding, which has important implications for the maintenance of genetic variation within populations.
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Lewandowski V, Sary C, Casetta J, De Souza FP, De Castro PL, Goes ESDR, De Oliveira CAL, Ribeiro RP, Vargas L. GENETIC VARIABILITY AND REPRODUCTIVE CHARACTERISTICS OF ZEBRAFISH (Cyprinidae Danio rerio) STOCKS. ACTA BIOLÓGICA COLOMBIANA 2021. [DOI: 10.15446/abc.v27n2.87739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Specimens of cultured zebrafish acquired from different fish farms in Brazil may show genetic variability and alteration in allele frequency due to genetic drift and selective pressure in a captive environment, resulting in the differentiation of productive and reproductive characteristics. The aim of this study was to evaluate the genetic variability and reproductive characteristics of 180 zebrafish specimens from six Brazilian fish farms. A deviation from the Hardy-Weinberg equilibrium was observed in all evaluated stocks. Differentiation among stocks was observed in the amount of genetic variability with respect to observed heterozygosity and the inbreeding coefficient (FIS). Genetic distance between stocks was determined through the Fst index, and the formation of four distinct groups was observed by plotting the dendrogram based on Nei’s genetic distance. Differences were observed among reproductive parameters, such as the average number of eggs per female and hatchability. This second parameter proved to be related to the level of inbreeding of the population, whereas this effect was not observed for spawning frequency. We conclude that zebrafish stocks from the 6 different Brazilian fish farms present significant genetic and phenotypic variability. The genetic structure affects fecundity and should be considered when carrying out work where reproductive rates are evaluated.
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Vitt S, Bakker TCM, Rick IP. Differential investment in pre- and post-mating male sexual traits in response to prolonged exposure to ambient UVB radiation in a fish. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 712:136341. [PMID: 31931223 DOI: 10.1016/j.scitotenv.2019.136341] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 12/12/2019] [Accepted: 12/24/2019] [Indexed: 06/10/2023]
Abstract
Increasing UVB radiation (UVB) reaching earth's surface following stratospheric ozone depletion is linked to serious consequences for organisms. While studies have focused on direct cytocidal and immunomodulatory effects of UVB, indirect consequences for fitness-related life-history traits are largely unexplored, although knowledge is needed to understand organismal responses to climate change. The present study investigates the effects of developmental exposure to enhanced, but ecologically relevant, ambient UVB levels on growth (body size), parental behavior (nest-building), fitness-enhancing traits of pre-mating (sexual ornamentation) and post-mating (sperm traits) sexual selection as well as their interrelationships in male three-spined sticklebacks (Gasterosteus aculeatus). Moreover, potentially underlying direct UVB effects, testicular antioxidant capacity (TAC) and testes and skin melanization were quantified. Juvenile full-siblings were split into two groups and raised until adulthood in a semi-natural set-up under light conditions including either natural (UVBnormal) or elevated UVB levels (UVBenhanced). When becoming reproductive, males were kept individually before data collection took place at their reproductive peak. The results showed that males from the UVBenhanced-group were smaller than their brothers from the UVBnormal-treatment, whereas no treatment differences were observed for sexual ornamentation, sperm traits and TAC. Moreover, UVB-stressed males built their nests faster and the relationship between body size and nest size was negative for UVBenhanced-males while being positive for UVBnormal-males. These results demonstrate that, depending on physical state, UVB-stressed males adjusted their behavior to some extent. Additionally, a trade-off between the investment in pre- and post-mating traits was found for UVBenhanced-males, i.e. the intensity of their breeding coloration was negatively correlated with sperm number whereas this relationship was reversed for UVBnormal-males, thus showing an interaction between pre- and post-mating traits regarding exposure treatment. The interaction provides first experimental evidence that differential allocation to energetically demanding pre- and post-mating components of male fitness is triggered by a key environmental stressor of climate change.
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Affiliation(s)
- Simon Vitt
- Institute for Evolutionary Biology and Ecology, University of Bonn, An der Immenburg 1, D-53121 Bonn, Germany.
| | - Theo C M Bakker
- Institute for Evolutionary Biology and Ecology, University of Bonn, An der Immenburg 1, D-53121 Bonn, Germany
| | - Ingolf P Rick
- Institute for Evolutionary Biology and Ecology, University of Bonn, An der Immenburg 1, D-53121 Bonn, Germany
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5
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Carballo L, Battistotti A, Teltscher K, Lierz M, Bublat A, Valcu M, Kempenaers B. Sperm morphology and evidence for sperm competition among parrots. J Evol Biol 2019; 32:856-867. [PMID: 31245887 PMCID: PMC6852422 DOI: 10.1111/jeb.13487] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 05/10/2019] [Accepted: 05/13/2019] [Indexed: 11/28/2022]
Abstract
Sperm competition is an important component of post‐copulatory sexual selection that has shaped the evolution of sperm morphology. Previous studies have reported that sperm competition has a concurrently directional and stabilizing effect on sperm size. For example, bird species that show higher levels of extrapair paternity and larger testes (proxies for the intensity of sperm competition) have longer sperm and lower coefficients of variation in sperm length, both within and between males. For this reason, these sperm traits have been proposed as indexes to estimate the level of sperm competition in species for which other measures are not available. The relationship between sperm competition and sperm morphology has been explored mostly for bird species that breed in temperate zones, with the main focus on passerine birds. We measured sperm morphology in 62 parrot species that breed mainly in the tropics and related variation in sperm length to life‐history traits potentially indicative of the level of sperm competition. We showed that sperm length negatively correlated with the within‐male coefficient of variation in sperm length and positively with testes mass. We also showed that sperm is longer in sexually dichromatic and in gregarious species. Our results support the general validity of the hypothesis that sperm competition drives variation in sperm morphology. Our analyses suggest that post‐copulatory sexual selection is also important in tropical species, with more intense sperm competition among sexually dichromatic species and among species that breed at higher densities.
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Affiliation(s)
- Luisana Carballo
- Department of Behavioural Ecology and Evolutionary Genetics, Max Planck Institute for Ornithology, Seewiesen, Germany
| | - Alessandra Battistotti
- Department of Behavioural Ecology and Evolutionary Genetics, Max Planck Institute for Ornithology, Seewiesen, Germany.,Department of Biology, University of Padua, Padova, Italy
| | - Kim Teltscher
- Department of Behavioural Ecology and Evolutionary Genetics, Max Planck Institute for Ornithology, Seewiesen, Germany
| | - Michael Lierz
- Clinic for Birds, Reptiles, Amphibians and Fish, Justus-Liebig University, Giessen, Germany
| | - Andreas Bublat
- Clinic for Birds, Reptiles, Amphibians and Fish, Justus-Liebig University, Giessen, Germany
| | - Mihai Valcu
- Department of Behavioural Ecology and Evolutionary Genetics, Max Planck Institute for Ornithology, Seewiesen, Germany
| | - Bart Kempenaers
- Department of Behavioural Ecology and Evolutionary Genetics, Max Planck Institute for Ornithology, Seewiesen, Germany
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Vitt S, Mehlis-Rick M, Bakker TCM, Rick IP. Enhanced ambient UVB radiation affects post-mating, but not pre-mating sexual traits in a fish. Oecologia 2019; 190:355-366. [PMID: 31134331 DOI: 10.1007/s00442-019-04422-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Accepted: 05/19/2019] [Indexed: 12/11/2022]
Abstract
Organisms inhabiting shallow aquatic habitats currently experience increasing levels of solar ultraviolet B radiation (UVB). UVB causes damage on cellular and molecular levels and can affect associated life-history traits either through direct exposure or indirectly through oxidative stress generation. We examined UVB effects on pre- and post-mating sexual traits in three-spined stickleback fish (Gasterosteus aculeatus). Adult, reproductively non-active males were assigned to two exposure treatments under semi-natural conditions in an outdoor experiment; one group received natural radiation (UVBnormal) whilst the other group received additional UVB (UVBenhanced). After two months, colour metrics were used to quantify male breeding colouration as pre-mating trait. At the post-mating stage, sperm morphology, number and movement as well as testes mass were determined. Males did not significantly differ in sexual ornamentation between treatments, but UVBenhanced fish had smaller testes as well as fewer and shorter sperm than UVBnormal fish. Sperm movement was not significantly different between treatments. However, in UVBenhanced males, linear and progressive movement of sperm was positively correlated with sperm morphology (head-to-tail length ratio), whereas in UVBnormal males this relationship was negative (but not significant). Additionally, there was a significant treatment by body condition interaction concerning head-to-tail length ratio, i.e. head-to-tail length ratio increased with condition in UVBnormal males whereas there was no relationship in UVBenhanced fish. Our findings reveal that increased UVB levels influence post-mating fitness-relevant traits in males whilst having no significant impact on pre-mating sexual traits, suggesting selective UVB-effects at the gamete level with consequences for reproductive performance.
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Affiliation(s)
- Simon Vitt
- Institute for Evolutionary Biology and Ecology, University of Bonn, An der Immenburg 1, 53121, Bonn, Germany.
| | - Marion Mehlis-Rick
- Institute for Evolutionary Biology and Ecology, University of Bonn, An der Immenburg 1, 53121, Bonn, Germany
| | - Theo C M Bakker
- Institute for Evolutionary Biology and Ecology, University of Bonn, An der Immenburg 1, 53121, Bonn, Germany
| | - Ingolf P Rick
- Institute for Evolutionary Biology and Ecology, University of Bonn, An der Immenburg 1, 53121, Bonn, Germany
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7
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Delmore JL, Brennan PLR, Orr TJ. Reproductive melanization may protect sperm from harmful solar radiation. Evol Ecol 2018. [DOI: 10.1007/s10682-018-9932-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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8
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Langen K, Bakker TCM, Baldauf SA, Shrestha J, Thünken T. Effects of ageing and inbreeding on the reproductive traits in a cichlid fish I: the male perspective. Biol J Linn Soc Lond 2017. [DOI: 10.1093/biolinnean/blw002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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9
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Vega‐Trejo R, Head ML, Keogh JS, Jennions MD. Experimental evidence for sexual selection against inbred males. J Anim Ecol 2017; 86:394-404. [DOI: 10.1111/1365-2656.12615] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 11/24/2016] [Indexed: 11/28/2022]
Affiliation(s)
- Regina Vega‐Trejo
- Division of Ecology and Evolution, Research School of Biology The Australian National University, Acton Canberra ACT 2601 Australia
| | - Megan L. Head
- Division of Ecology and Evolution, Research School of Biology The Australian National University, Acton Canberra ACT 2601 Australia
| | - J. Scott Keogh
- Division of Ecology and Evolution, Research School of Biology The Australian National University, Acton Canberra ACT 2601 Australia
| | - Michael D. Jennions
- Division of Ecology and Evolution, Research School of Biology The Australian National University, Acton Canberra ACT 2601 Australia
- Wissenschaftskolleg zu Berlin Wallotstraße 19 14193 Berlin Germany
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10
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Joseph PN, Sasson DA, Allen PE, Somjee U, Miller CW. Adult nutrition, but not inbreeding, affects male primary sexual traits in the leaf-footed cactus bug Narnia femorata (Hemiptera: Coreidae). Ecol Evol 2016; 6:4792-9. [PMID: 27547313 PMCID: PMC4979707 DOI: 10.1002/ece3.2246] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 05/16/2016] [Accepted: 05/18/2016] [Indexed: 01/27/2023] Open
Abstract
Adverse conditions may be the norm rather than the exception in natural populations. Many populations experience poor nutrition on a seasonal basis. Further, brief interludes of inbreeding can be common as population density fluctuates and because of habitat fragmentation. Here, we investigated the effects of poor nutrition and inbreeding on traits that can be very important to reproductive success and fitness in males: testes mass, sperm concentration, and sperm viability. Our study species was Narnia femorata, a species introduced to north-central Florida in the 1950s. This species encounters regular, seasonal changes in diet that can have profound phenotypic effects on morphology and behavior. We generated inbred and outbred individuals through a single generation of full-sibling mating or outcrossing, respectively. All juveniles were provided a natural, high-quality diet of Opuntia humifusa cactus cladode with fruit until they reached adulthood. New adult males were put on a high- or low-quality diet for at least 21 days before measurements were taken. As expected, the low-quality diet led to significantly decreased testes mass in both inbred and outbred males, although there were surprisingly no detectable effects on sperm traits. We did not find evidence that inbreeding affected testes mass, sperm concentration, and sperm viability. Our results highlight the immediate and overwhelming effects of nutrition on testes mass, while suggesting that a single generation of inbreeding might not be detrimental for primary sexual traits in this particular population.
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Affiliation(s)
- Paul N Joseph
- Entomology and Nematology Department University of Florida 1881 Natural Area Drive Gainesville Florida 32608
| | - Daniel A Sasson
- Whitney Laboratory for Marine Bioscience University of Florida 9505 Ocean Shore Blvd St. Augustine Florida 32080
| | - Pablo E Allen
- Entomology and Nematology Department University of Florida 1881 Natural Area Drive Gainesville Florida 32608
| | - Ummat Somjee
- Entomology and Nematology Department University of Florida 1881 Natural Area Drive Gainesville Florida 32608
| | - Christine W Miller
- Entomology and Nematology Department University of Florida 1881 Natural Area Drive Gainesville Florida 32608
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11
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Opatová P, Ihle M, Albrechtová J, Tomášek O, Kempenaers B, Forstmeier W, Albrecht T. Inbreeding depression of sperm traits in the zebra finch Taeniopygia guttata. Ecol Evol 2015; 6:295-304. [PMID: 26811793 PMCID: PMC4716522 DOI: 10.1002/ece3.1868] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 11/05/2015] [Accepted: 11/06/2015] [Indexed: 11/08/2022] Open
Abstract
Inbreeding depression, or the reduction in fitness due to mating between close relatives, is a key issue in biology today. Inbreeding negatively affects many fitness‐related traits, including survival and reproductive success. Despite this, very few studies have quantified the effects of inbreeding on vertebrate gamete traits under controlled breeding conditions using a full‐sib mating approach. Here, we provide comprehensive evidence for the negative effect of inbreeding on sperm traits in a bird, the zebra finch Taeniopygia guttata. We compared sperm characteristics of both inbred (pedigree F = 0.25) and outbred (pedigree F = 0) individuals from two captive populations, one domesticated and one recently wild‐derived, raised under standardized conditions. As normal spermatozoa morphology did not differ consistently between inbred and outbred individuals, our study confirms the hypothesis that sperm morphology is not particularly susceptible to inbreeding depression. Inbreeding did, however, lead to significantly lower sperm motility and a substantially higher percentage of abnormal spermatozoa in ejaculate. These results were consistent across both study populations, confirming the generality and reliability of our findings.
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Affiliation(s)
- Pavlína Opatová
- Institute of Vertebrate Biology Academy of Sciences of the Czech Republic v.v.i. Květná 8CZ-603 65 Brno Czech Republic; Department of Botany and Zoology Faculty of Science Masaryk University Kotlářská 267/2CZ-61137 Brno Czech Republic
| | - Malika Ihle
- Department of Behavioural Ecology and Evolutionary Genetics Max Planck Institute for Ornithology Eberhard-Gwinner-Strasse 7 82319 Seewiesen Germany
| | - Jana Albrechtová
- Institute of Vertebrate Biology Academy of Sciences of the Czech Republic v.v.i. Květná 8CZ-603 65 Brno Czech Republic; Charles University in Prague Faculty of Sciences Department of Zoology Viničná 7CZ-12844 Prague Czech Republic
| | - Oldřich Tomášek
- Institute of Vertebrate Biology Academy of Sciences of the Czech Republic v.v.i. Květná 8CZ-603 65 Brno Czech Republic; Charles University in Prague Faculty of Sciences Department of Zoology Viničná 7CZ-12844 Prague Czech Republic
| | - Bart Kempenaers
- Department of Behavioural Ecology and Evolutionary Genetics Max Planck Institute for Ornithology Eberhard-Gwinner-Strasse 7 82319 Seewiesen Germany
| | - Wolfgang Forstmeier
- Department of Behavioural Ecology and Evolutionary Genetics Max Planck Institute for Ornithology Eberhard-Gwinner-Strasse 7 82319 Seewiesen Germany
| | - Tomáš Albrecht
- Institute of Vertebrate Biology Academy of Sciences of the Czech Republic v.v.i. Květná 8CZ-603 65 Brno Czech Republic; Charles University in Prague Faculty of Sciences Department of Zoology Viničná 7CZ-12844 Prague Czech Republic
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12
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Mehlis M, Rahn AK, Bakker TCM. Sperm quality but not relatedness predicts sperm competition success in threespine sticklebacks (Gasterosteus aculeatus). BMC Evol Biol 2015; 15:74. [PMID: 25928309 PMCID: PMC4415302 DOI: 10.1186/s12862-015-0353-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 04/15/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Mating between close relatives often leads to a reduction of an individual's fitness, due to an increased expression of deleterious alleles. Thus, in many animal taxa pre- as well as postcopulatory inbreeding avoidance mechanisms have evolved. An increased risk of inbreeding and hence a loss of genetic variation may occur during founder events as in most cases only few individuals establish a new population. The threespine stickleback (Gasterosteus aculeatus) is a small externally fertilizing fish species subject to strong sperm competition. Sticklebacks inhabit both marine and freshwater environments and anadromous populations have repeatedly established new genetically less diverse freshwater populations. Previous studies showed that anadromous sticklebacks strongly suffer from inbreeding depression and when given the choice females prefer to mate with unrelated males. RESULTS The present study aimed to address whether there exists a postcopulatory inbreeding avoidance mechanism solely based on sperm-egg interactions in sperm competition experiments. We used F1 individuals that originated either from a large, genetically heterogeneous anadromous population or from a small, genetically less diverse freshwater population. For each population, eggs of two different females were in vitro fertilized by the same two males' sperm in a paired study design. In the main experiment one male was the female's full-sib brother and in the control experiment all individuals were unrelated. The results revealed that fertilization success was independent of relatedness in both populations suggesting a general lack of a postcopulatory inbreeding avoidance mechanism. Instead, male quality (i.e. sperm morphology) predicted paternity success during competitive fertilization trials. CONCLUSION In sticklebacks, there is no evidence for postcopulatory inbreeding avoidance. Sperm morphology predicted paternity instead, thus sperm quality traits are under strong sexual selection, presumably driven by the high risk of sperm competition under natural conditions.
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Affiliation(s)
- Marion Mehlis
- Institute for Evolutionary Biology and Ecology, University of Bonn, An der Immenburg 1, D-53121, Bonn, Germany.
| | - Anna K Rahn
- Institute for Evolutionary Biology and Ecology, University of Bonn, An der Immenburg 1, D-53121, Bonn, Germany.
| | - Theo C M Bakker
- Institute for Evolutionary Biology and Ecology, University of Bonn, An der Immenburg 1, D-53121, Bonn, Germany.
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13
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Losdat S, Chang SM, Reid JM. Inbreeding depression in male gametic performance. J Evol Biol 2014; 27:992-1011. [DOI: 10.1111/jeb.12403] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Revised: 04/01/2014] [Accepted: 04/02/2014] [Indexed: 12/23/2022]
Affiliation(s)
- S. Losdat
- Institute of Biological and Environmental Sciences; School of Biological Sciences; University of Aberdeen; Aberdeen UK
| | - S.-M. Chang
- Plant Biology Department; University of Georgia; Athens GA USA
| | - J. M. Reid
- Institute of Biological and Environmental Sciences; School of Biological Sciences; University of Aberdeen; Aberdeen UK
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14
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The influence of ambient water temperature on sperm performance and fertilization success in three-spined sticklebacks (Gasterosteus aculeatus). Evol Ecol 2014. [DOI: 10.1007/s10682-014-9707-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Dubey S, Roulin A. Evolutionary and biomedical consequences of internal melanins. Pigment Cell Melanoma Res 2014; 27:327-38. [DOI: 10.1111/pcmr.12231] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Sylvain Dubey
- Department of Ecology and Evolution; University of Lausanne; Biophore Lausanne Switzerland
| | - Alexandre Roulin
- Department of Ecology and Evolution; University of Lausanne; Biophore Lausanne Switzerland
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16
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Ramm SA, Schärer L. The evolutionary ecology of testicular function: size isn't everything. Biol Rev Camb Philos Soc 2014; 89:874-88. [DOI: 10.1111/brv.12084] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Revised: 12/23/2013] [Accepted: 01/12/2014] [Indexed: 12/22/2022]
Affiliation(s)
- Steven A. Ramm
- Evolutionary Biology; Bielefeld University; Morgenbreede 45 33615 Bielefeld Germany
| | - Lukas Schärer
- Evolutionary Biology; Zoological Institute, University of Basel; Vesalgasse 1 4051 Basel Switzerland
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17
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Bakker TCM, Hollmann M, Mehlis M, Zbinden M. Functional variation of sperm morphology in sticklebacks. Behav Ecol Sociobiol 2014. [DOI: 10.1007/s00265-013-1676-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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18
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Rick IP, Mehlis M, Eßer E, Bakker TCM. The influence of ambient ultraviolet light on sperm quality and sexual ornamentation in three-spined sticklebacks (Gasterosteus aculeatus). Oecologia 2013; 174:393-402. [DOI: 10.1007/s00442-013-2773-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Accepted: 09/03/2013] [Indexed: 11/28/2022]
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19
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Meunier J, Kölliker M. Inbreeding depression in an insect with maternal care: influences of family interactions, life stage and offspring sex. J Evol Biol 2013; 26:2209-20. [DOI: 10.1111/jeb.12217] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Accepted: 06/16/2013] [Indexed: 01/19/2023]
Affiliation(s)
- J. Meunier
- Zoological Institute; Evolutionary Biology; Johannes Gutenberg University Mainz; Mainz Germany
| | - M. Kölliker
- Department of Environmental Sciences; Zoology and Evolution; University of Basel; Basel Switzerland
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Ala-Honkola O, Hosken DJ, Manier MK, Lüpold S, Droge-Young EM, Berben KS, Collins WF, Belote JM, Pitnick S. Inbreeding reveals mode of past selection on male reproductive characters in Drosophila melanogaster. Ecol Evol 2013; 3:2089-102. [PMID: 23919154 PMCID: PMC3728949 DOI: 10.1002/ece3.625] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Revised: 05/03/2013] [Accepted: 05/06/2013] [Indexed: 01/22/2023] Open
Abstract
Directional dominance is a prerequisite of inbreeding depression. Directionality arises when selection drives alleles that increase fitness to fixation and eliminates dominant deleterious alleles, while deleterious recessives are hidden from it and maintained at low frequencies. Traits under directional selection (i.e., fitness traits) are expected to show directional dominance and therefore an increased susceptibility to inbreeding depression. In contrast, traits under stabilizing selection or weakly linked to fitness are predicted to exhibit little-to-no inbreeding depression. Here, we quantify the extent of inbreeding depression in a range of male reproductive characters and then infer the mode of past selection on them. The use of transgenic populations of Drosophila melanogaster with red or green fluorescent-tagged sperm heads permitted in vivo discrimination of sperm from competing males and quantification of characteristics of ejaculate composition, performance, and fate. We found that male attractiveness (mating latency) and competitive fertilization success (P2) both show some inbreeding depression, suggesting they may have been under directional selection, whereas sperm length showed no inbreeding depression suggesting a history of stabilizing selection. However, despite having measured several sperm quality and quantity traits, our data did not allow us to discern the mechanism underlying the lowered competitive fertilization success of inbred (f = 0.50) males.
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Affiliation(s)
- Outi Ala-Honkola
- Department of Biology, Syracuse University Syracuse, New York ; Department of Biological and Environmental Science, University of Jyväskylä PO Box 35, 40014, Finland
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Mehlis M, Bakker TC. Male reproductive traits of full-sibs of different age classes in three-spined sticklebacks (Gasterosteus aculeatus). SPRINGERPLUS 2013; 2:175. [PMID: 23667819 PMCID: PMC3650239 DOI: 10.1186/2193-1801-2-175] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Accepted: 04/04/2013] [Indexed: 12/20/2022]
Abstract
The process of ageing is associated with negative effects of mutations acting late in life, which range from those affecting cells to those affecting the whole organism. In many animal taxa, the deterioration of the phenotype with age also affects traits such as males’ primary and secondary sexual characteristics. In three-spined sticklebacks (Gasterosteus aculeatus), males usually reproduce at one or two years of age. To see whether sexual selection has the potential to differ between young and old males, full-sib brothers of different age classes were compared, which were bred and raised under standardised laboratory conditions. During two simulated, successive breeding seasons males were allowed to build their nest in single tanks either in the first (“young males”) or in the second (“old males”) breeding season. A comparison of reproductively active brothers of the first and second breeding season showed that older males produce more but smaller sperm, which might be of lower quality. The fact that older males stored more sperm is size dependent as the results show that larger males possess a greater absolute testis mass, which is inextricably linked to sperm number. However, independent of body size, old males had a lower intensity of red/orange and UV breeding coloration as well as a reduced testis melanisation, which might have consequences in female mate choice and sperm competition.
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Affiliation(s)
- Marion Mehlis
- Institute for Evolutionary Biology and Ecology, University of Bonn, An der Immenburg 1, D-53121 Bonn, Germany
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