The definition of sexual selection

Behavioral Ecology, Год журнала: 2021, Номер 32(5), С. 781 - 794

Опубликована: Май 11, 2021

Sexual selection is a key component of evolutionary biology. However, from the very formulation sexual by Darwin, nature and extent have been controversial. Recently, such controversy has led back to fundamental question just what is. This included how we incorporate female-female reproductive competition into or natural selection. In this review, do four things. First, examine want definition do. Second, define selection:

Язык: Английский

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Fertilization mode drives sperm length evolution across the animal tree of life

Nature Ecology & Evolution, Год журнала: 2021, Номер 5(8), С. 1153 - 1164

Опубликована: Июнь 21, 2021

Язык: Английский

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The evolution of female genitalia

Journal of Evolutionary Biology, Год журнала: 2019, Номер 32(9), С. 882 - 899

Опубликована: Июль 3, 2019

Female genitalia have been largely neglected in studies of genital evolution, perhaps due to the long-standing belief that they are relatively invariable and therefore taxonomically evolutionarily uninformative comparison with male genitalia. Contemporary evolution begun dispute this view, demonstrate female can be highly diverse covary males. Here, we examine evidence for three mechanisms females: species isolating 'lock-and-key' cryptic choice sexual conflict. Lock-and-key has thought unimportant; however, present cases show how isolation may well play a role Much support via conflict comes from both invertebrate vertebrate species; effects difficult distinguish models focus on putative benefits females. We offer potential solutions alleviate issue. Finally, directions future order expand refine our knowledge surrounding evolution.

Язык: Английский

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Post‐ejaculatory modifications to sperm (PEMS)

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Год журнала: 2019, Номер 95(2), С. 365 - 392

Опубликована: Ноя. 18, 2019

ABSTRACT Mammalian sperm must spend a minimum period of time within female reproductive tract to achieve the capacity fertilize oocytes. This phenomenon, termed ‘capacitation’, was discovered nearly seven decades ago and opened window into complexities sperm–female interaction. Capacitation is most commonly used refer specific combination processes that are believed be widespread in mammals includes modifications plasma membrane, elevation intracellular cyclic AMP levels, induction protein tyrosine phosphorylation, increased Ca 2+ hyperactivation motility, and, eventually, acrosome reaction. only one example post‐ejaculatory (PEMS) throughout animal kingdom. Although PEMS less well studied non‐mammalian taxa, they likely represent rule rather than exception species with internal fertilization. These diverse form collectively outcome selection fashioning complex maturational trajectories include multiple, sequential phenotypes specialized for stage‐specific functionality female. In many cases, critical migrate successfully through tract, survive protracted storage, reach site fertilization and/or eggs. We predict will exhibit phenotypic plasticity mediated by interactions. The successful execution thus has important implications variation fitness operation post‐copulatory sexual selection. Furthermore, it may provide mechanism isolation maintenance boundaries. Despite their possible ubiquity importance, investigation been largely descriptive, lacking any phylogenetic consideration regard divergence, there have no theoretical or empirical investigations evolutionary significance. Here, we ( i ) clarify PEMS‐related nomenclature; ii address origin, divergence context life history complex, selective environment tract; iii describe taxonomically types PEMS: activation, chemotaxis dissociation conjugates; iv review occurence kingdom; v consider alternative hypotheses adaptive value PEMS; vi speculate on genomic architecture, selection, isolation; vii suggest fruitful directions future functional analyses PEMS.

Язык: Английский

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When Ecology Fails: How Reproductive Interactions Promote Species Coexistence

Trends in Ecology & Evolution, Год журнала: 2021, Номер 36(7), С. 610 - 622

Опубликована: Март 27, 2021

Язык: Английский

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How Important Is Sexual Isolation to Speciation?

Cold Spring Harbor Perspectives in Biology, Год журнала: 2024, Номер unknown, С. a041427 - a041427

Опубликована: Фев. 12, 2024

A central role for sexual isolation in the formation of new species and establishment boundaries has been noticed since Darwin is frequently emphasized modern literature on speciation. However, an objective evaluation when how plays a speciation carried out few taxa. We discuss three approaches assessing importance relative to other reproductive barriers, including evolutionary rate trait differentiation, strength sympatry, long-term persistence diverging forms. First, we evaluate evidence as whether evolves faster than barriers during early stages divergence. Second, available strong or stronger between closely related sympatric species. Finally, consider effect persistence, barriers. highlight challenges our knowledge opportunities improve upon understanding from different phases process.

Язык: Английский

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Plasticity, symbionts and niche construction interact in shaping dung beetle development and evolution

Journal of Experimental Biology, Год журнала: 2024, Номер 227(Suppl_1)

Опубликована: Март 7, 2024

ABSTRACT Developmental plasticity is an important product of evolutionary processes, allowing organisms to maintain high fitness in the face environmental perturbations. Once evolved, also has potential influence subsequent outcomes, for example, by shaping phenotypic variation visible selection and facilitating emergence novel trait variants. Furthermore, may not just respond conditions through but actively modify abiotic (sym)biotic environments which they themselves respond, causing interact complex ways with niche construction. Here, we explore developmental mechanisms consequences horned dung beetles. First, discuss how post-invasion evolution introduced Onthophagus species facilitated rapid range expansion concurrent local adaptation life history morphology climatic conditions. Second, how, addition plastically responding nutritional conditions, beetles engage behaviors that environment during later development. We document these environment-modifying mask heritable traits within populations, thereby shielding genetic variants from selection. Such cryptic be released become selectable when are compromised. Together, this work documents interactions between plasticity, symbionts construction, highlights usefulness integrative Eco–Evo–Devo framework study varied development evolution.

Язык: Английский

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How female × male and male × male interactions influence competitive fertilization inDrosophila melanogaster

Evolution Letters, Год журнала: 2020, Номер 4(5), С. 416 - 429

Опубликована: Сен. 5, 2020

How males and females contribute to joint reproductive success has been a long-standing question in sexual selection. Under postcopulatory selection, paternity is predicted derive from complex interactions among engaging cryptic female choice sperm competition. Such have identified as potential sources of genetic variation sexually selected traits but are also expected inhibit trait diversification. To date, studies between competing focused almost exclusively on genotypes not phenotypic traits. Here, we characterize within- between-sex Drosophila melanogaster using isogenic lines with heritable both male known influence competitive fertilization. We confirmed, expanded on, previously reported genotypic within the sexes, showed that several events, including transfer, ejection, storage, were explained by two- three-way sex-specific phenotypes. documented lengths males' seminal receptacle, which experienced rapid female-male co-diversification. Our results highlight nonindependence competition demonstrate sexes do limit ability multivariate systems respond directional

Язык: Английский

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Fertilization mode differentially impacts the evolution of vertebrate sperm components

Nature Communications, Год журнала: 2022, Номер 13(1)

Опубликована: Ноя. 10, 2022

Abstract Environmental change frequently drives morphological diversification, including at the cellular level. Transitions in environment where fertilization occurs (i.e., mode) are hypothesized to be a driver of extreme diversity sperm morphology observed animals. Yet how mode impacts evolution components—head, midpiece, and flagellum—each with different functional roles that must act as an integrated unit remains unclear. Here, we test this hypothesis by examining component lengths across 1103 species vertebrates varying (external vs. internal fertilization). Sperm length is explained part vertebrates, but influences varies among components vertebrate clades. We also identify evolutionary responses not influenced mode: midpieces evolve rapidly both external fertilizers. Fertilization thus through complex component- clade-specific responses.

Язык: Английский

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The coevolutionary dynamics of cryptic female choice

Evolution Letters, Год журнала: 2023, Номер 7(4), С. 191 - 202

Опубликована: Июнь 7, 2023

In contrast to sexual selection on traits that affect interactions between the sexes before mating, little theoretical research has focused coevolution of postmating via cryptic female choice (when females bias fertilization toward specific males). We used simulation models ask (a) whether and, if so, how nondirectional (female-by-male in success) causes deviations from focus exclusively male-mediated processes, and (b) risk sperm competition, strength choice, tradeoffs number interact influence coevolutionary dynamics traits. found incorporating can result males investing much less their ejaculates than predicted by with competition only. also resulted evolution genetic correlations traits, even when was weak, low. This suggests may be important systems low multiple mating. These increased as increased. When high, extreme codivergence preference occurred trait traded off number. male lagged behind traits; this lag decreased increasing competition. Overall, our results suggest deserves more attention theoretically driving ways just beginning explored.

Язык: Английский

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