Journal of Evolutionary Biology最新文献

Parental age effects on offspring fitness in a wild population of a short-lived reptile. 一种短命爬行动物野生种群中亲代年龄对后代适应性的影响。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-10-17 DOI: 10.1093/jeb/voaf128

C Ashlyn Crain, Tyler N Wittman, Rachana S Bhave, Heidi A Seears, Aaron M Reedy, Ariel F Kahrl, Daniel A Warner, Robert M Cox

{"title":"Parental age effects on offspring fitness in a wild population of a short-lived reptile.","authors":"C Ashlyn Crain, Tyler N Wittman, Rachana S Bhave, Heidi A Seears, Aaron M Reedy, Ariel F Kahrl, Daniel A Warner, Robert M Cox","doi":"10.1093/jeb/voaf128","DOIUrl":"https://doi.org/10.1093/jeb/voaf128","url":null,"abstract":"As organisms age, the fitness of the offspring they produce can decline, which is often attributed to parental senescence. However, few studies have tested for effects of parental age on offspring fitness in wild populations or in short-lived vertebrates, and only recently have studies begun to examine such effects in male and female offspring independently. Here, we use five generations of mark-recapture and genetic parentage data from an island population of a short-lived lizard, the brown anole (Anolis sagrei), to test for effects of maternal and paternal age on the survival to adulthood, first-year reproductive success, longevity, and lifetime fitness of their offspring. When comparing parents of different ages within the same offspring cohort, survival to adulthood increased with paternal age in sons, but we found no effects of maternal or paternal age on any component of fitness in daughters and no evidence that parental age effects differed based on the sex of the parent or the offspring. When considering repeated measures of individual parents sampled at multiple ages, we found that first-year reproductive success of sons decreased with paternal age, but longevity of sons increased with maternal age. However, when pooling sons and daughters, we found no overall effects of parental age on any component of offspring fitness, and little evidence that parental age effects differed between sons and daughters. Our study adds to the growing literature suggesting that negative effects of parental age on offspring fitness may not be as prevalent as once thought, particularly in wild populations.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145309759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The genetical evolution of social preferences: where the categorical imperatives of Hamilton, Kant and Nash meet. 社会偏好的遗传进化：汉密尔顿、康德和纳什的绝对命令在哪里相遇。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-10-16 DOI: 10.1093/jeb/voaf120

Laurent Lehmann

{"title":"The genetical evolution of social preferences: where the categorical imperatives of Hamilton, Kant and Nash meet.","authors":"Laurent Lehmann","doi":"10.1093/jeb/voaf120","DOIUrl":"https://doi.org/10.1093/jeb/voaf120","url":null,"abstract":"This paper models the genetical evolution of individual behavioral rules that guide the choice of strategies in pairwise assortative interactions under incomplete information. Building on results at the crossroads of evolutionary theory and game theory, it is first shown that in an uninvadable population state of behavioral rule evolution, individuals are compelled to use strategies that are Nash equilibria of a lineage fitness game. Thus, choice behavior evolves to be representable as the maximization of a utility function, as if each individual holds a personal preference that orders both their own and their interaction partner's strategies. Second, the paper contrasts two representations of personal utility that are found to be uninvadable. The first is semi-Kantian in form. This preference averages a fitness self-interest with a relatedness weighted Kantian interest. The latter interest evaluates the consequence of own behavior for own fitness, assuming the interaction partner adopts the same behavior as self. The second preference is a personal inclusive fitness. This preference combines a self-regarding interest with a relatedness weighted other-regarding interest. Each such interest takes the form of an average effect, which evaluates the consequence of expressing own behavior, instead of average population behavior, on a statistical average fitness to self and the interaction partner.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145304189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Maintenance and loss of microbe-mediated protection in the absence of pathogens. 在没有病原体的情况下微生物介导的保护的维持和丧失。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-10-15 DOI: 10.1093/jeb/voaf090

Melinda Kemlein, Lena Peters, Hinrich Schulenburg, Nancy Obeng

{"title":"Maintenance and loss of microbe-mediated protection in the absence of pathogens.","authors":"Melinda Kemlein, Lena Peters, Hinrich Schulenburg, Nancy Obeng","doi":"10.1093/jeb/voaf090","DOIUrl":"10.1093/jeb/voaf090","url":null,"abstract":"Protective microbes are known for their service to hosts. While they allow hosts to survive infection, microbes, too, benefit from successful inhibition of incoming pathogens. Under constant pathogen exposure, protective symbionts should thus be selected for. Yet, it is less clear if, and how, microbe-mediated protection is maintained in symbionts in the absence of pathogen pressure. Addressing the stability of protective symbiosis during bacterial adaptation to healthy hosts, we studied microbe-mediated protection of Pseudomonas lurida MYb11 against pathogenic Bacillus thuringiensis Bt247 in its natural host Caenorhabditis elegans MY316. Specifically, we assessed host protection and in vitro inhibition of the pathogen for a collection of derived MYb11 isolates, which were previously evolved during serial passaging in healthy C. elegans hosts. We found that all evolved MYb11 isolates continued to inhibit the pathogen in vitro, while most, albeit not all, continued to protect hosts. We focused on two of these isolates, MT5 and MT11, one with and one without protection, and found that intact protection is associated with high symbiont colonization and resulting lower pathogen proportions. In sum, our study dissects the stability of a natural protective symbiosis and suggests that high colonization ability ensures microbe-mediated protection, even if microbes adapt to host association in the absence of pathogen selection.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"1387-1395"},"PeriodicalIF":2.3,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144676380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A path analysis disentangling determinants of natal dispersal in a cooperatively breeding bird. 合作繁殖鸟类出生分散决定因素的通径分析。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-10-15 DOI: 10.1093/jeb/voaf084

Mirjam J Borger, Kiran G L Lee, Franz J Weissing, David S Richardson, Hannah L Dugdale, Terry Burke, Ido Pen, Jan Komdeur

{"title":"A path analysis disentangling determinants of natal dispersal in a cooperatively breeding bird.","authors":"Mirjam J Borger, Kiran G L Lee, Franz J Weissing, David S Richardson, Hannah L Dugdale, Terry Burke, Ido Pen, Jan Komdeur","doi":"10.1093/jeb/voaf084","DOIUrl":"10.1093/jeb/voaf084","url":null,"abstract":"Delayed offspring dispersal, the prolonged residence in the natal territory after reaching independence and before dispersing to breed elsewhere, is an important aspect of the evolution of cooperative breeding. By applying a path analysis approach to the long-term Seychelles warbler (Acrocephalus sechellensis) dataset, we studied whether and how delayed dispersal is affected by territory quality, the presence of helpers and non-helping subordinates, maternal breeding status, age and fecundity, and offspring sex ratio. We found that offspring are more likely to disperse when their genetic mothers are co-breeders, helpers are absent, and territory quality is high, highlighting that a complex interplay of ecological and social factors shapes dispersal decisions. In contrast to earlier findings, our analysis does not support the idea that the offspring sex ratio is affected by territory quality and helper presence. Collectively, this study underscores the importance of considering proximate factors in understanding cooperative breeding dynamics, and it shows that path analyses offer valuable insights into dissecting the intricate relationships influencing dispersal in wild populations.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"1347-1358"},"PeriodicalIF":2.3,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144499046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Noise pollution and artificial light at night alter selection pressures on sexual signals in an urban adapter. 噪音污染和夜间人造光改变了城市适配器中性信号的选择压力。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-10-15 DOI: 10.1093/jeb/voaf092

Andrew D Cronin, Rotem Zilber, Paul Jerem, Wouter Halfwerk

{"title":"Noise pollution and artificial light at night alter selection pressures on sexual signals in an urban adapter.","authors":"Andrew D Cronin, Rotem Zilber, Paul Jerem, Wouter Halfwerk","doi":"10.1093/jeb/voaf092","DOIUrl":"10.1093/jeb/voaf092","url":null,"abstract":"Human-induced environmental changes can have major impacts on how individuals communicate. Species using sexual signals may experience especially rapid shifts in their interactions with both intended receivers (mates) and eavesdroppers (predators). Artificial light at night and anthropogenic noise represent 2 major environmental features of human-dominated habitats which may alter selection pressures imposed on sexual signalers. In this study, we used a full factorial design to investigate individual and combined effects of experimentally added light and noise pollution on the attraction of female frogs and bat predators to speakers broadcasting male túngara frog (Engystomops pustulosus) calls. We conducted 2-choice tests in the field to examine whether predatory and mating preferences for signals differing in conspicuousness change in response to noise and light pollution. Light pollution reduced the number of approaches from predators and mates attracted to our playbacks. The addition of noise pollution enhanced this effect on predators but decreased it for female frogs. Light also lowered female frog preference for conspicuous calls, but this effect was counteracted when noise pollution was added. Reduced numbers of predators and female frogs found under lit conditions suggest light pollution can both reduce natural selection and increase sexual selection pressures on male signals. These findings indicate that light pollution could be responsible for the reduced numbers of predatory bats and female frogs found in urban environments, providing a causal explanation for more conspicuous and attractive sexual signalling in males from urban populations.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"1410-1420"},"PeriodicalIF":2.3,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144638590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Metagenomic spaces: a framework to study the effect of microbiome variation on animal ecology and evolution. 宏基因组空间：研究微生物组变异对动物生态和进化影响的框架。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-10-15 DOI: 10.1093/jeb/voaf063

Antton Alberdi, Morten T Limborg, Mathieu Groussin, Ostaizka Aizpurua, M Thomas P Gilbert

{"title":"Metagenomic spaces: a framework to study the effect of microbiome variation on animal ecology and evolution.","authors":"Antton Alberdi, Morten T Limborg, Mathieu Groussin, Ostaizka Aizpurua, M Thomas P Gilbert","doi":"10.1093/jeb/voaf063","DOIUrl":"10.1093/jeb/voaf063","url":null,"abstract":"Microorganisms are essential for the normal functioning of most vertebrates. Hence, identifying and measuring the factors that shape host-associated microbial communities is necessary to understand the ecological and evolutionary implications of host-microbiota associations. We propose a framework, built on the so-called \"metagenomic space\" concept, which incorporates multiple definitions and quantifiable features relating to the variation of microbial communities that are associated with vertebrate hosts. By drawing on diverse theories and concepts developed in different fields of biology, our framework sets a conceptual landscape that transcends the mere characterization of microbial communities. This provides the basis to study more complex attributes, such as \"potential metagenomic space\" and \"fundamental metagenomic space,\" \"metagenomic plasticity,\" and \"metagenomic evolvability,\" which we argue are essential for understanding the microbial contribution to vertebrate host ecology and evolution-and hold considerable promise for advancing applied research and innovation. In doing so, we hope to contribute to an improved understanding of the impact of spatiotemporal variation of vertebrate host-microbiota associations, and inspire new approaches to address testable hypotheses related to ecological, evolutionary, and applied processes.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"1285-1298"},"PeriodicalIF":2.3,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144129272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanisms of colour-production modulate the link between extra-pair paternity and avian sexual dichromatism. 颜色产生的机制调节了额外对父权和鸟类性别二色性之间的联系。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-10-15 DOI: 10.1093/jeb/voaf085

Cristina-Maria Valcu, Mihai Valcu, Kaspar Delhey, Bart Kempenaers

{"title":"Mechanisms of colour-production modulate the link between extra-pair paternity and avian sexual dichromatism.","authors":"Cristina-Maria Valcu, Mihai Valcu, Kaspar Delhey, Bart Kempenaers","doi":"10.1093/jeb/voaf085","DOIUrl":"10.1093/jeb/voaf085","url":null,"abstract":"Most birds are socially monogamous, but extra-pair paternity (EPP) is widespread. EPP can increase variance in male reproductive success and the opportunity for sexual selection, potentially leading to sexual dichromatism. While the link between EPP and sexual dichromatism is well established, over two decades ago, Owens and Hartley suggested that this relationship is mainly driven by structural colours, that is, colours that are created by the interaction between light and the feather microstructure, presumably because of their role in active sexual displays. However, this conclusion was based on a small sample of species. Here, we expand these analyses investigating the relationship between EPP and male and female colouration produced by three colour-producing mechanisms-melanin-based, carotenoid-based, and structural colouration-across over 400 bird species. Our results reveal that EPP relates to colouration across all three mechanisms. In species with high EPP levels, males tend to have more black and less light brown, whereas females are often more cryptically coloured, with less red and blue. Species with high EPP levels also exhibited more colour-producing mechanisms. Our study suggests that EPP can enhance sexual dichromatism by favouring conspicuous male and cryptic female colouration.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"1359-1372"},"PeriodicalIF":2.3,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144530783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A test of specific adaptation to symbiont-conferred host resistance in natural populations of a parasitoid wasp. 寄生蜂自然种群对共生体赋予的寄主抗性的特异性适应试验。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-10-15 DOI: 10.1093/jeb/voaf083

Youn Henry, Maxime Dahirel, Jesper Wallisch, Sandro Ginesi, Christoph Vorburger

{"title":"A test of specific adaptation to symbiont-conferred host resistance in natural populations of a parasitoid wasp.","authors":"Youn Henry, Maxime Dahirel, Jesper Wallisch, Sandro Ginesi, Christoph Vorburger","doi":"10.1093/jeb/voaf083","DOIUrl":"10.1093/jeb/voaf083","url":null,"abstract":"Parasitoids are important natural enemies of insects, imposing strong selection for the evolution of resistance. In aphids, the heritable endosymbiont Hamiltonella defensa is a key determinant of resistance, making symbiont-conferred defence a potential target for specific adaptation by parasitoids. We tested this hypothesis in the aphid parasitoid Lysiphlebus fabarum and four of its host species, Aphis fabae fabae, A. hederae, A. urticata, and A. ruborum. The parasitoids show host-associated genetic differentiation indicative of host specialization, and each of these aphid species harbours their own 1-3 distinct strains of H. defensa. We introduced eight H. defensa strains from all four aphid species into a common host background (a laboratory strain of symbiont-free A. fabae fabae) and then tested the ability of 35 field-collected L. fabarum lines from the same four hosts to parasitize the H. defensa-carrying aphids. The origin of symbionts affected parasitism success, with strains from A. fabae fabae and A. hederae conferring strong protection, and strains from A. urticata and A. ruborum providing virtually no protection. For one strain each from A. fabae fabae and A. hederae, we found a signature of specific adaptation by parasitoids, as parasitoids able to overcome their protection mostly came from the same hosts as the symbiont strains. Two other strains were so strongly protective that they permitted very little parasitism independent of where parasitoids came from. While not fully conclusive, these results are consistent with specialized parasitoids adapting to certain defensive symbionts of their host species, supporting the notion of symbiont-mediated coevolution.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"1335-1346"},"PeriodicalIF":2.3,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144499047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Independent evolution of atypical sperm morphology in a passerine bird. 雀形目鸟类非典型精子形态的独立进化。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-10-15 DOI: 10.1093/jeb/voaf087

Melissah Rowe, Daniel M Hooper, Antje Hofgaard, Laura L Hurley, Callum S McDiarmid, Ioanna Pataraia, Jan T Lifjeld, Simon C Griffith

{"title":"Independent evolution of atypical sperm morphology in a passerine bird.","authors":"Melissah Rowe, Daniel M Hooper, Antje Hofgaard, Laura L Hurley, Callum S McDiarmid, Ioanna Pataraia, Jan T Lifjeld, Simon C Griffith","doi":"10.1093/jeb/voaf087","DOIUrl":"10.1093/jeb/voaf087","url":null,"abstract":"Spermatozoa exhibit striking morphological variation across the animal kingdom. In passerine birds, sperm exhibit considerable variation in size, yet the basic sperm phenotype is highly conserved; sperm are filiform, the head is corkscrew-shaped, and the midpiece is elongated and twisted around the flagellum. A significant departure from this typical sperm morphology has been reported in the sister species, the Eurasian bullfinch (Pyrrhula pyrrhula) and Azores bullfinch (P. murina). Here, we report a second evolutionary shift in passerine sperm phenotype in the nominate subspecies of the red-browed finch (Neochmia temporalis temporalis); sperm are nonfiliform, with an ellipsoid head and an extremely short midpiece restricted to the nuclear-axoneme junction. Additionally, we show that the sperm phenotype of the red-browed finch is similar to the putatively neotenous sperm described in the two bullfinch species. Using whole-genome data, we found no evidence that the unusual sperm phenotype of the red-browed finch is associated with reduced genetic variation or a population bottleneck. In contrast, using data on relative testes size, we find some support for the hypothesis that relaxed postcopulatory sexual selection, via a lack of sperm competition, may, at least in part, explain the unusual sperm of the red-browed finch. We also discuss the possible roles of mutation, genetic drift, and genetic hitchhiking in the evolutionary origins and maintenance of neotenous sperm phenotypes. Finally, we suggest that these dramatic evolutionary shifts in sperm phenotype warrant further investigation and highlight the need for a greater understanding of the developmental and genomic basis of sperm phenotype.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"1373-1386"},"PeriodicalIF":2.3,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144561824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dispersal and the evolution of sex differences in cooperation in cooperatively breeding birds and mammals. 鸟类和哺乳动物在合作繁殖中的分散和性别差异的进化。

IF 2.3 3区生物学

Journal of Evolutionary Biology Pub Date : 2025-10-15 DOI: 10.1093/jeb/voaf080

Patrick Fenner, Thomas E Currie, Andrew J Young

{"title":"Dispersal and the evolution of sex differences in cooperation in cooperatively breeding birds and mammals.","authors":"Patrick Fenner, Thomas E Currie, Andrew J Young","doi":"10.1093/jeb/voaf080","DOIUrl":"10.1093/jeb/voaf080","url":null,"abstract":"Sex differences in cooperation are widespread, but their evolution remains poorly understood. Here, we use comparative analyses of the cooperatively breeding birds and mammals to formally test the leading Dispersal Hypothesis for the evolution of sex differences in cooperation. The Dispersal Hypothesis predicts that, where both sexes delay dispersal from their natal group, individuals of the more dispersive sex should contribute to natal cooperation at lower rates (either because leaving the natal group earlier reduces the downstream direct benefit from natal cooperation or because dispersal activities trade-off against natal cooperation). Our comparative analyses reveal support for the Dispersal Hypothesis; sex biases in dispersal predict sex biases in helper contributions to cooperative care within the natal group across cooperative birds and mammals. Strikingly, in every species that showed significant sex biases in both dispersal and natal helping, the direction of sex bias in dispersal predicted that in natal helping in the manner predicted by the Dispersal Hypothesis. Our analyses also suggest that these patterns cannot be readily attributed instead to alternative hypothesized drivers of sex differences in cooperation (kin selection, heterogamety, paternity uncertainty, patterns of parental care, or differences between birds and mammals). These findings help to clarify the evolutionary drivers of sex differences in cooperation and highlight the need for single-species studies to tease apart whether sex differences in dispersal predict sex differences in natal cooperation because dispersal impacts the direct benefits of natal cooperation (as is often proposed) or because activities that promote dispersal trade off against natal cooperation.","PeriodicalId":50198,"journal":{"name":"Journal of Evolutionary Biology","volume":" ","pages":"1299-1311"},"PeriodicalIF":2.3,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144545885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0