Evolution最新文献_第2页

Exaggerated male hindlegs function as pure weapons of male-male combat in thorny devil stick insects. 夸张的雄性后肢在带刺的棍棒昆虫中作为雄性战斗的纯粹武器。

IF 2.6 2区环境科学与生态学

Evolution Pub Date : 2026-05-05 DOI: 10.1093/evolut/qpag079

Romain P Boisseau, Douglas J Emlen

{"title":"Exaggerated male hindlegs function as pure weapons of male-male combat in thorny devil stick insects.","authors":"Romain P Boisseau, Douglas J Emlen","doi":"10.1093/evolut/qpag079","DOIUrl":"https://doi.org/10.1093/evolut/qpag079","url":null,"abstract":"Sexually selected weapons can function as both combat tools and agonistic signals, depending on whether and how males assess rivals. We investigated the function of the enlarged male hindlegs in the New Guinean thorny devil stick insect, Eurycantha calcarata in male-male and male-female interactions. Field and laboratory observations showed that larger males with proportionally larger hindlegs were more likely to win fights and subsequently mate. Behavioral sequence analyses and contest cost predictors indicated that males likely use a mutual assessment strategy. Surprisingly, males did not appear to use their hindlegs as signals of fighting ability. Rather, rival assessment may be mediated by tactile and chemical cues, as suggested by frequent antennation observed during contests. Hindlegs were employed mainly to deliver powerful squeezes in rare, escalated fights. During copulation, males also used hindlegs to stabilize their position, but females did not appear to resist, providing no evidence for a coercive function. These findings suggest that enlarged male hindlegs in E. calcarata serve purely as force-delivering combat tools rather than signaling structures. These results highlight how understanding the specific functions and contexts of weapon use provides critical insight into the diversification of sexually selected traits.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147835563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Digest: Evolution of viral fitness is influenced by host genetic spatial structure. 摘要：病毒适应性的进化受到宿主遗传空间结构的影响。

IF 2.6 2区环境科学与生态学

Evolution Pub Date : 2026-04-30 DOI: 10.1093/evolut/qpag077

Ares Casas

引用次数: 0

From mating to sperm storage: density-dependent plasticity in pre- and post-copulatory shared mating traits. 从交配到精子储存：交配前和交配后共享交配特征的密度依赖性可塑性。

IF 2.6 2区环境科学与生态学

Evolution Pub Date : 2026-04-29 DOI: 10.1093/evolut/qpag076

Tuba Rizvi, Cristina Tuni, Klaus Reinhold

{"title":"From mating to sperm storage: density-dependent plasticity in pre- and post-copulatory shared mating traits.","authors":"Tuba Rizvi, Cristina Tuni, Klaus Reinhold","doi":"10.1093/evolut/qpag076","DOIUrl":"https://doi.org/10.1093/evolut/qpag076","url":null,"abstract":"Mating interactions depend on traits expressed jointly by males and females, yet the extent to which each sex controls variation in these shared mating traits remains unclear. Because the expression of such traits (like mating latency, copulation duration, and sperm transfer) depends on both partners, their evolution is constrained by intersexual correlations yet facilitated by behavioral plasticity that allows each sex to adjust trait expression across environments. In this study we investigated whether shared mating traits are determined by male or female control or whether the observed outcomes result from interactions of the developmental environment of both partners. Drawing from the well-known mating system of the banded cricket, Gryllodes sigillatus, we used a fully factorial mating design using combinations of male and female partners reared at high or low same-sex density and tested how they shape shared pre- and post-copulatory traits. We found that female developmental density affected mating latency, with low-density females exhibiting longer latencies, suggesting female control and mate choice. In contrast, male developmental density affected sperm transfer and subsequent sperm storage, with males from high-density treatments transferring significantly more sperm consistent with adaptive ejaculate adjustment to sperm competition risk, as well as contributing to higher sperm storage in females. Copulation duration varied with female body mass but not density, indicating plastic responses to partner quality rather than social context. By partitioning environmental effects between the sexes, our study highlights how developmental context can be used to examine sex-specific contributions to shared mating traits.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147766634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evolution of sexually dimorphic plumage patterns in estrildid finches. 雌鸟两性二态羽毛模式的进化。

IF 2.6 2区环境科学与生态学

Evolution Pub Date : 2026-04-29 DOI: 10.1093/evolut/qpag074

João Pacheco, Gonçalo C Cardoso, Michael D Sorenson, Ana Cristina R Gomes

{"title":"Evolution of sexually dimorphic plumage patterns in estrildid finches.","authors":"João Pacheco, Gonçalo C Cardoso, Michael D Sorenson, Ana Cristina R Gomes","doi":"10.1093/evolut/qpag074","DOIUrl":"https://doi.org/10.1093/evolut/qpag074","url":null,"abstract":"Pigmentation patterns aid in camouflage and may also serve for communication. To understand the evolution of different types of within-feather pigmentation patterns, we studied the bird family Estrildidae, in which barred and spotted feathers are common. We found that gains and losses of barred or spotted plumage generally occurred simultaneously in both sexes. Sexual dimorphism evolved mostly via sex-specific losses of pigmentation patterns, rather than sex-specific gains, especially for spotted plumage. These results are consistent with evolution by genetic correlation between the sexes, followed by evolution of sex-specific pathways for trait reduction. Evolution by genetic correlation may be common for pigmentation patterns because they are not conspicuous to distant predators, and expressing them should rarely be detrimental. Previous work found correlated evolution of courtship dance and the overall complexity of estrildid pigmentation patterns, but we did not find this association for the extent of pigmentation patterns. Perhaps other properties of pigmentation patterns, and not their extent, evolve together with dance. Furthermore, the extent of barred or spotted plumage was not associated with colour ornamentation, nor with socioecological traits indicating need for camouflage or sexual signalling. This may reflect different and/or multiple functions for these within-feather pigmentation patterns in different species.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147766606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Digest: Diet links cryptic genetic variation to growth-aging trade-offs. 《文摘》：饮食将隐性遗传变异与生长衰老权衡联系起来。

IF 2.6 2区环境科学与生态学

Evolution Pub Date : 2026-04-28 DOI: 10.1093/evolut/qpag072

Luna Canaj

引用次数: 0

Multivariate morphological divergence due to intraguild predation. 动物内部捕食引起的多元形态分化。

IF 2.6 2区环境科学与生态学

Evolution Pub Date : 2026-04-28 DOI: 10.1093/evolut/qpag073

Jonathan Fassora, Jordan S Martin, Blake Matthews

{"title":"Multivariate morphological divergence due to intraguild predation.","authors":"Jonathan Fassora, Jordan S Martin, Blake Matthews","doi":"10.1093/evolut/qpag073","DOIUrl":"https://doi.org/10.1093/evolut/qpag073","url":null,"abstract":"Intraguild predation, defined as predation between consumers of a shared resource, is widespread in nature and likely to be an important selective pressure shaping the evolution of defensive and foraging traits in many ecosystems. In many lakes of Southern Greenland, threespine stickleback (Gasterosteus aculeatus) can both compete with- and be preyed upon by Arctic charr (Salvelinus alpinus), meaning that stickleback trait evolution in this system may be influenced by intraguild predation. To test this, we analyse multivariate morphological variation within and across 36 stickleback populations, of which 18 sympatric with charr and 18 without charr. We find evidence of stickleback adaptation to intraguild predation particularly in defensive morphology, via longer spines and larger structural armour, though surprisingly not via more numerous lateral plates. Foraging morphology also responds to the presence of charr, with a shift towards littoral-adapted traits. These differences are revealed beyond single trait comparisons, as we discover diverging patterns of phenotypic (co)variance, with generally lower variation and dimensionality and stronger integration in populations with charr, indicative of selection for efficiency and erosion of variation. These findings corroborate the niche shift hypothesis for the evolutionary consequences of intraguild predation. Further, we find agreement between ecological theory of intraguild predation stability and our results on phenotypic change. Ultimately, our study provides a link between a multi-faceted ecological interaction-intraguild predation-and its high-dimensional evolutionary outcome-the multivariate phenotype-and showcases the power and importance of adopting a multivariate approach in evolutionary ecology studies.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147766573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Guarding versus self-guarding in innate immunity. 先天免疫中的防卫与自我防卫。

IF 2.6 2区环境科学与生态学

Evolution Pub Date : 2026-04-25 DOI: 10.1093/evolut/qpag075

Ben Ashby, Alyssa Anderson

{"title":"Guarding versus self-guarding in innate immunity.","authors":"Ben Ashby, Alyssa Anderson","doi":"10.1093/evolut/qpag075","DOIUrl":"https://doi.org/10.1093/evolut/qpag075","url":null,"abstract":"Hosts have evolved a variety of innate immune responses to pathogens. In many cases, hosts directly detect pathogen-associated molecular patterns (PAMPs) or pathogen effectors to trigger an immune response. However, hosts may also detect pathogens indirectly through 'guarding', whereby immune receptors ('guards') monitor the effects of pathogens (e.g., modification of target cells) rather than the pathogens themselves. Guarding poses a different evolutionary challenge for pathogens than direct recognition of PAMPs, as replication may necessitate the modification or disruption of guarded host proteins ('guardees'). Recently, self-guarding has been discovered, in which the host target functions as both guard and guardee. Self-guarding appears to present an intractable problem for pathogens: modification of the host target may benefit replication, but also triggers an immune response. If self-guarding creates an apparently inescapable detection mechanism, why has self-guarding only recently been discovered? Here, we use mathematical models of within-host pathogen and immune dynamics to compare guarding and self-guarding architectures. We show that self-guarding leads to a more rapid immune response and faster pathogen suppression, but is also more prone to false-positive immune responses, likely imposing greater costs through autoimmunity. We therefore hypothesise that the greater potential for false-positive immune responses may limit the conditions under which self-guarding evolves.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147766564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Revisiting the Evolution of Wing Dimorphisms in the Genomics Era. 回顾基因组学时代翅膀二态性的进化。

IF 2.6 2区环境科学与生态学

Evolution Pub Date : 2026-04-24 DOI: 10.1093/evolut/qpag067

Lisa A Treidel, Colin D Meiklejohn, Kristi L Montooth

{"title":"Revisiting the Evolution of Wing Dimorphisms in the Genomics Era.","authors":"Lisa A Treidel, Colin D Meiklejohn, Kristi L Montooth","doi":"10.1093/evolut/qpag067","DOIUrl":"https://doi.org/10.1093/evolut/qpag067","url":null,"abstract":"Dispersal strategies are critical life history traits influencing bio-geographical, ecological, and evolutionary patterns and processes including range-expansion and contractions, abiotic and biotic interactions, and rates of speciation. Yet, dispersal strategies are challenging to study because they are complex suites of morphological, physiological, and behavioral traits. Thus, our understanding of how and why dispersal strategies evolve remains incomplete. Wing dimorphisms have evolved repeatedly within nearly every major insect order and are characterized by the co-occurrence of fully winged dispersing and short- or wingless non-dispersing morphs within species or populations, making them ideal model systems for studying the evolution of alternative dispersal strategies. Forty years ago, Derek Roff proposed that wing dimorphisms are a threshold trait which evolves as an intermediate step on the trajectory toward complete loss of flight, driven by the high physiological and life history costs of dispersal. Here, we synthesize recent mechanistic studies of wing-morph determination along with new phylogenetic reconstructions of wing dimorphism in the well-developed model Gryllus field crickets to update and refine our evolutionary hypotheses and identify critical areas for future inquiry.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147766640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Geographic isolation after admixture generates a distinct lineage in an Atlantic Forest bird. 混合后的地理隔离在大西洋森林鸟中产生了独特的谱系。

IF 2.6 2区环境科学与生态学

Evolution Pub Date : 2026-04-24 DOI: 10.1093/evolut/qpag069

Rafael D Lima, Fernanda Bocalini, Vitor Gomes, Emily N Ostrow, Therese A Catanach, Jason D Weckstein, Luís Fábio Silveira, Vítor Q Piacentini

{"title":"Geographic isolation after admixture generates a distinct lineage in an Atlantic Forest bird.","authors":"Rafael D Lima, Fernanda Bocalini, Vitor Gomes, Emily N Ostrow, Therese A Catanach, Jason D Weckstein, Luís Fábio Silveira, Vítor Q Piacentini","doi":"10.1093/evolut/qpag069","DOIUrl":"https://doi.org/10.1093/evolut/qpag069","url":null,"abstract":"Although traditionally viewed as opposing divergence, hybridization can have diverse evolutionary outcomes. Yet its role in lineage divergence remains unclear. To investigate this process, we examined the evolutionary history of the Black-cheeked Gnateater (Conopophaga melanops) from the Atlantic Forest of eastern Brazil. The central subspecies, C. m. perspicillata, exhibits plumage traits intermediate to northern and southern populations, raising the question of whether this pattern reflects isolation-by-distance, recent hybridization, or past admixture. Using genome-wide markers from sequencing of ultraconserved elements along with phenotypic data, we assessed genetic structure and trait variation across the species' range. Our analyses reveal four population genetic clusters, with the two central clusters exhibiting clear signatures of historical admixture. Despite this admixture, central populations are genetically differentiated from northern and southern lineages and sing a distinct song, suggesting divergence following admixture or transgressive segregation. We propose that past hybridization followed by geographic isolation contributed to the formation of a divergent, reticulate lineage within the Black-cheeked Gnateater. This system provides an opportunity to investigate how gene flow and allopatric divergence interact to shape lineage diversity and offers a natural framework for testing the conditions under which reticulate lineages may emerge, persist, and diverge.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147766593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The functional significance of striping in rodents. 啮齿动物条纹的功能意义。

IF 2.6 2区环境科学与生态学

Evolution Pub Date : 2026-04-24 DOI: 10.1093/evolut/qpag070

Tim Caro, Lauren Gellately, Natasha Howell, Joseph N Keating, Catherine Sheard

引用次数: 0