Fitness costs of female choosiness in a socially monogamous songbird DOI Creative Commons
Wolfgang Forstmeier, Daiping Wang, Katrin Martin

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2021, Volume and Issue: unknown

Published: May 4, 2021

Abstract Female mate choice is thought to be responsible for the evolution of many extravagant male ornaments and displays, but costs being too selective may hinder choosiness. Selection against choosiness should strongest in socially monogamous mating systems, because females end up without a partner forego reproduction, especially when prefer same few partners (frequency-dependent selection). Here we quantify fitness having preferences that are difficult satisfy. We capitalise on recent discovery female zebra finches ( Taeniopygia guttata ) males familiar song dialect. measured captive breeding colonies which one third were given ample opportunity choose their preferred dialect (two thirds all males; ‘relaxed competition’), while two had compete over limited pool mates they (one ‘high competition’). As expected, social pairings strongly assortative with regard In high-competition group, 26% remained unpaired, yet still obtained relatively high by using brood parasitism as an alternative reproductive tactic. Another 31% paired disassortatively These showed increased levels extra-pair paternity, mostly same-dialect sires, suggesting not abolished after pairing. However, did have lower success. Overall, group reached equal those experienced relaxed competition. Our study suggests tactics such egg dumping can help overcome frequency-dependent highly system, thereby facilitating

Language: Английский

The role of genetic constraints and social environment in explaining female extra‐pair mating DOI Creative Commons
Daiping Wang, Wolfgang Forstmeier, Katrin Martin

et al.

Evolution, Journal Year: 2019, Volume and Issue: 74(3), P. 544 - 558

Published: Dec. 28, 2019

Why do females of socially monogamous species engage in extra-pair copulations? This long-standing question remains a puzzle, because the benefits female promiscuous behavior often not seem to outweigh costs. Genetic constraint models offer an answer by proposing that promiscuity emerges through selection favoring alleles are either beneficial for male reproductive success (intersexual pleiotropy hypothesis) or fecundity (intrasexual hypothesis). A previous quantitative genetic study on captive zebra finches, Taeniopygia guttata, reported support first, but second hypothesis. Here, we re-examine both hypotheses based data from lines selected high and low courtship rate. In contrast conclusions, our new analyses clearly reject hypothesis genetically homologous traits. We find some positive correlation between fecundity. also shows behavioral outcome courtships primarily depends individual-specific preferences "attractiveness" social mate. contrast, patterns paternity strongly influenced partner pair bond, presumably reflecting variation copulation behavior, fertility, sperm competitiveness.

Language: Английский

Citations

22
Offspring performance is well buffered against stress experienced by ancestors DOI Creative Commons
Yifan Pei, Wolfgang Forstmeier, Bart Kempenaers

et al.

Evolution, Journal Year: 2020, Volume and Issue: 74(7), P. 1525 - 1539

Published: May 28, 2020

Evolution should render individuals resistant to stress and particularly experienced by ancestors. However, many studies report negative effects of one generation on the performance subsequent generations. To assess strength such transgenerational we propose a strategy aimed at overcoming problem type I errors when testing multiple proxies in ancestors against offspring traits, apply it large observational dataset captive zebra finches (Taeniopygia guttata). We combine clear one-tailed hypotheses with steps validation, meta-analytic summary mean effect sizes, independent confirmatory testing. find that drastic differences early growth conditions (nestling body mass 8 days after hatching varied sevenfold between 1.7 12.4 g) had only moderate direct adult morphology (95% confidence interval [CI]: r = 0.19-0.27) small fitness traits (r 0.02-0.12). In contrast, found no indirect parental or grandparental condition -0.017 0.002; 138 sizes), mixed evidence for benefits matching environments parents offspring, as latter was not robust datasets. This study shows evolution has led remarkable robustness undernourishment. Our suggests are absent this species, because CIs exclude all biologically relevant sizes.

Language: Английский

Citations

8
Offspring performance is well buffered against stress experienced by ancestors DOI Creative Commons
Yifan Pei, Wolfgang Forstmeier, Bart Kempenaers

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2020, Volume and Issue: unknown

Published: Jan. 10, 2020

Abstract Evolution should render individuals resistant to stress and particularly experienced by ancestors. However, many studies report negative effects of one generation on the performance subsequent generations. To assess strength such transgenerational we used a strategy aimed at overcoming problem type I errors when testing multiple proxies in ancestors against offspring traits, applied it large observational data set captive zebra finches ( Taeniopygia guttata ). We combined clear one-tailed hypotheses with steps validation, meta-analytic summary mean effect sizes, independent confirmatory testing. With this approach what extent adulthood depends (1) direct own experiences during early development, (2) indirect condition-transfer environment parents grandparents, (3) beneficial match between environments its parents. Our study shows that drastic differences growth conditions (nestling body mass 8 days after hatching varied 7-fold 1.7 12.4 gram) had only moderate adult morphology (95%CI: r=0.19-0.27) small fitness traits (r=0.02-0.12). In contrast, found no parental or grandparental condition (r=-0.017-0.002; 138 sizes), mixed evidence for benefits matching environments, as latter was not robust sets. This evolution has led remarkable robustness undernourishment are absent. Author Summary How life your might influence life, an aspect epigenetic inheritance, become popular topic among evolutionary biologists sparked much interest general public. Many theoretical empirical have addressed question, leading theories adaptive programming transfer ideas genetic organization. Despite popularity topic, however, there is lack standard framework guide studies, which risk over-interpreting most significant emerge chance alone conducting number tests. study, long-term morphological life-history hundreds male female information both focal birds their grandparents. allows us comprehensively quantify magnitude developmental conditions. proposes standardized statistical future investigations, summarizes average size (in finches) indicates sample sizes needed pick up effect, provides counter statement growing faith ubiquity despite limited mechanistic plausibility.

Language: Английский

Citations

2
Fitness costs of female choosiness in a socially monogamous songbird DOI Creative Commons
Wolfgang Forstmeier, Daiping Wang, Katrin Martin

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2021, Volume and Issue: unknown

Published: May 4, 2021

Abstract Female mate choice is thought to be responsible for the evolution of many extravagant male ornaments and displays, but costs being too selective may hinder choosiness. Selection against choosiness should strongest in socially monogamous mating systems, because females end up without a partner forego reproduction, especially when prefer same few partners (frequency-dependent selection). Here we quantify fitness having preferences that are difficult satisfy. We capitalise on recent discovery female zebra finches ( Taeniopygia guttata ) males familiar song dialect. measured captive breeding colonies which one third were given ample opportunity choose their preferred dialect (two thirds all males; ‘relaxed competition’), while two had compete over limited pool mates they (one ‘high competition’). As expected, social pairings strongly assortative with regard In high-competition group, 26% remained unpaired, yet still obtained relatively high by using brood parasitism as an alternative reproductive tactic. Another 31% paired disassortatively These showed increased levels extra-pair paternity, mostly same-dialect sires, suggesting not abolished after pairing. However, did have lower success. Overall, group reached equal those experienced relaxed competition. Our study suggests tactics such egg dumping can help overcome frequency-dependent highly system, thereby facilitating

Language: Английский

Citations

1