Ultraviolet signaling in a butterfly is preferred by females and conveys male genetic quality

Evolution, Journal Year: 2024, Volume and Issue: 78(8), P. 1372 - 1381

Published: May 22, 2024

Abstract Indicator models of sexual selection posit that females choose males on the basis traits reveal male genetic quality and thereby enjoy increased offspring production. Here, we report butterfly Eurema hecabe receive indirect benefits from choosing based their ultraviolet (UV) wing coloration, a heritable condition-dependent trait in this species. We first used large laboratory-bred pedigree to demonstrate per-family association between inbreeding UV value. Females exerted choice for UV-bright within protocol, average value over six consecutive generations, presumably due such despite an increasing rate pedigree-wide inbreeding. then experimentally imposed standard strength upon lines divergent values. Inbreeding depressed siring performance low treatment more severely resulted marginal reduction brightness, which rebounded sharply following subsequent outcrossing. These findings are consistent with ornament-based signaling as function underlying individual-level mutational load.

Language: Английский

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Prediction of individual differences in non-iridescent structural plumage colour from nanostructural periodicity and regularity

Royal Society Open Science, Journal Year: 2024, Volume and Issue: 11(6)

Published: June 1, 2024

Non-iridescent structural plumage reflectance is a sexually selected indicator of individual quality in several bird species. However, the basis differences remains unclear. In particular, dominant periodicity quasi-ordered feather barb nanostructure key importance colour generation, but no study has successfully traced back parameters, and particularly hue, to nanostructural periodicity, although this would be deciphering information content variation. We used matrix small-angle X-ray scattering measurements intact, stacked samples from blue tit crown estimate sex-dependence variation its effects on light reflectance. Measures predicted brightness, ultraviolet chroma also with statistically similar two sexes. we observed lack overall effect inhomogeneity chromaticity, sex-dependent accuracy hue prediction strong position estimation error. suggest that attributes are modified by other structures sex-specific manner, within-individual parameters exists within or among feathers confounds interpretation structure–reflectance relationships at area level.

Language: Английский

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Male Adaptive Plasticity Can Explain the Evolution of Sexual Perception Costs

The American Naturalist, Journal Year: 2022, Volume and Issue: 200(3), P. E110 - E123

Published: April 13, 2022

AbstractSensory perception of environmental cues has been shown to trigger plastic responses that can induce important fitness costs, including the dramatic modulation aging across distant taxa. For example, male Drosophila melanogaster suffer a marked decrease in fitness, characterized by faster reproductive and actuarial aging, if they perceive female but fail mate shortly after (aging via sexual perception). While this breakthrough for our understanding mechanisms it raises question why such evolved. Here, we used D. ask whether costs may be by-product adaptive cues. We found (a) short-term (1 day) before mating opportunities increases relative lifetime success competitive environment, (b) medium-term (3-7 days) is neutral, (c) long-term (15 leads costs. then ran mathematical simulations under wide range sociosexual demographic scenarios show whenever rates fluctuate within experienced other insects wild, suggesting widespread strategy nature. Finally, that, because benefits will acquired mostly high-quality males while paid low-quality males, significantly magnify selection (15%-27% average increase opportunity selection).

Language: Английский

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Ecology and the evolution of sex chromosomes

Journal of Evolutionary Biology, Journal Year: 2022, Volume and Issue: 35(12), P. 1601 - 1618

Published: Aug. 11, 2022

Abstract Sex chromosomes are common features of animal genomes, often carrying a sex determination gene responsible for initiating the development sexually dimorphic traits. The specific chromosome that serves as differs across taxa result fusions between and autosomes, along with turnover—autosomes becoming ‘reverting’ back to autosomes. In addition, types genes on frequently differ from evolve faster than autosomal genes. Sex‐specific selection pressures, such sexual antagonism selection, hypothesized be turnovers, unique content accelerated evolutionary rates chromosomes. has pronounced effects because their sex‐biased inheritance can tilt balance in favour one sex. Despite general consensus sex‐specific affects evolution, most population genetic models agnostic sources these many details about remain unresolved. Here, I review evidence ecological factors, including variable heterogeneous environments conflicts natural important determinants pressures shape evolution. also explain how studying ecology evolution help us understand unresolved aspects both selection.

Language: Английский

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Mating environments mediate the evolution of behavioral isolation during ecological speciation

Evolution Letters, Journal Year: 2024, Volume and Issue: 8(3), P. 448 - 454

Published: Jan. 27, 2024

The evolution of behavioral isolation is often the first step toward speciation. While past studies show that will sometimes evolve as a by-product divergent ecological selection, we lack more nuanced understanding factors may promote or hamper its evolution. environment in which mating occurs be important mediating whether evolves for two reasons. Ecological speciation could occur direct outcome different sexual interactions being favored environments. Alternatively, environments vary constraint they impose on traits underlying interactions, such populations evolving "constraining" would less likely to than constraining environment. In latter, not cause but rather permits only if other drivers are present. We test these ideas with set 28 experimental fly populations, each evolved under one and larval Counter prediction by environment, was maximal between Nonetheless, an factor among from other. Though conducive isolation, it sufficient: assortative adapting different-larval within indicating role Intriguingly, promoted characterized conflict compared Our results suggest play key via axes selection.

Language: Английский

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The impact of geographic isolation and host shifts on population divergence of the rare cicada Subpsaltria yangi

Molecular Phylogenetics and Evolution, Journal Year: 2024, Volume and Issue: 199, P. 108146 - 108146

Published: July 8, 2024

Language: Английский

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Evolutionary lability of sexual selection and its implications for speciation and macroevolution

The American Naturalist, Journal Year: 2024, Volume and Issue: unknown, P. 000 - 000

Published: Dec. 17, 2024

AbstractSexual selection is widely hypothesized to facilitate speciation and phenotypic evolution, but evidence from comparative studies has been mixed. Many previous have relied on proxy variables quantify the intensity of sexual selection, raising possibility that inconclusive results may reflect, in part, imperfect measurement this evolutionary process. Here, we test relationship between phylogenetic rates indices opportunity for drawn populations 82 vertebrate taxa. These provide a much more direct assessment than traits allow straightforward comparisons among distantly related clades. We find no correlation rate, result consistent across many complementary analyses. In addition, used variables-sexual dimorphism dichromatism-are not correlated with employed here. Moreover, low signal intraspecific variability species approaches range variation observed all vertebrates as whole. Our potentially reconcile major paradox biology at interface microevolution macroevolution: can be important speciation, yet lability process over deeper timescales restricts its impact broad-scale patterns biodiversity.

Language: Английский

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Sexually selected male weapon increases the risk of population extinction under environmental change: an experimental evidence

Evolution, Journal Year: 2023, Volume and Issue: 77(10), P. 2291 - 2300

Published: July 27, 2023

Exaggerated sexually selected traits (SSTs), occurring more commonly in males, help individuals to increase reproductive success but are costly produce and maintain. These costs on the one hand may improve population fitness by intensifying selection against maladapted other hand, risk of extinction under environmental challenges. However, impact SSTs has not been investigated experimentally. We used replicate populations a male-dimorphic mite, Rhizoglyphus robini, test if prevalence weapon affected temperature (TI) (2°C per each three consecutive generations). In two independent experiments that utilized either inbred lines or mass for establish experimental differing weapon, we found with high were likely go extinct. Extinctions occurred despite partial suppression expression at increased explained male mortality. Our results provide first, our knowledge, evidence demonstrating dramatic effect elaborated sexual

Language: Английский

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Polygamy and purifying selection in birds

Evolution, Journal Year: 2022, Volume and Issue: 77(1), P. 276 - 288

Published: Dec. 8, 2022

Good genes theories of sexual selection predict that polygamy will be associated with more efficient removal deleterious alleles (purifying selection), due to the alignment natural selection. On other hand, runaway expect no such and selection, may instead less purifying in polygamous species higher reproductive variance. In an analysis polymorphism data extracted from 150-bird genome assemblies, we show carry significantly fewer nonsynonymous polymorphisms, relative synonymous than monogamous bird (p = .0005). We also this effect is independent effective population size, consistent "good genes" Further analyses found impact on genetic diversity, while females (polyandry) had a marginally significant .045). recapitulate previous findings smaller body mass greater geographic range size are intense GC-biased gene conversion, diversity.

Language: Английский

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Sexual conflict over phenological traits: selection for protandry can lock populations into temporally mismatched reproduction

Evolution, Journal Year: 2022, Volume and Issue: 77(3), P. 789 - 800

Published: Dec. 14, 2022

Abstract In seasonal environments, competition among males can drive to emerge before females. Females, simultaneously, should avoid emerging at times after sufficient male availability. We show that the consequent sexual conflict over timing traits produce arms races toward ever earlier emergence, if low mate-search efficiency or sperm limitation elevate latter risk for reality, however, cannot proceed indefinitely as this ignores relevant ecological context phenology: temporal niche of resource availability offspring development. model interaction natural and selection predict load, i.e., loss population fitness caused by conflict. matelessness exacerbate another problem maladaptation: a mismatch between organism (e.g., insect) its host plant). Load frequently associates with protandry mate multiply, yet lack multiple mating does not imply zero load. A still evolve, where both sexes suboptimally early respect peak, because monogamy guarantee every individual finds one mate, favors individuals in mate-finding contexts.

Language: Английский

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