Origins of music in credible signaling

Behavioral and Brain Sciences, Год журнала: 2020, Номер 44

Опубликована: Авг. 26, 2020

Abstract Music comprises a diverse category of cognitive phenomena that likely represent both the effects psychological adaptations are specific to music (e.g., rhythmic entrainment) and for non-musical functions auditory scene analysis). How did evolve? Here, we show prevailing views on evolution – is byproduct other evolved faculties, social bonding, or signal mate quality incomplete wrong. We argue instead as credible in at least two contexts: coalitional interactions infant care. Specifically, propose (1) production reception coordinated, entrained displays co-evolved system credibly signaling coalition strength, size, coordination ability; (2) infant-directed song parental attention secondarily altricial infants. These proposals, supported by interdisciplinary evidence, suggest basic features music, such melody rhythm, result from proper domain human music. The provide foundation cultural its actual domain, yielding diversity musical forms behaviors found worldwide.

Язык: Английский

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Sperm bauplan and function and underlying processes of sperm formation and selection

Physiological Reviews, Год журнала: 2021, Номер 102(1), С. 7 - 60

Опубликована: Апрель 21, 2021

The spermatozoon is a highly differentiated and polarized cell, with two main structures: the head, containing haploid nucleus acrosomal exocytotic granule, flagellum, which generates energy propels cell; both structures are connected by neck. sperm’s aim to participate in fertilization, thus activating development. Despite this common bauplan function, there an enormous diversity structure performance of sperm cells. For example, mammalian spermatozoa may exhibit several head patterns overall lengths ranging from ∼30 350 µm. Mechanisms transport female tract, preparation for recognition interaction oocyte also show considerable variation. There has been much interest understanding origin diversity, evolutionary terms relation mechanisms underlying differentiation testis. Here, relationships between function examined at levels: first, analyzing selective forces that drive changes physiology understand adaptive values variation impact on male reproductive success second, examining cellular molecular formation testis explain how can give rise such wide array forms functions.

Язык: Английский

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Speciation by sexual selection: 20 years of progress

Trends in Ecology & Evolution, Год журнала: 2021, Номер 36(12), С. 1153 - 1163

Опубликована: Окт. 1, 2021

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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Unifying quantification methods for sexual selection and assortative mating using information theory

Theoretical Population Biology, Год журнала: 2024, Номер 158, С. 206 - 215

Опубликована: Июнь 24, 2024

Sexual selection plays a crucial role in modern evolutionary theory, offering valuable insight into patterns and species diversity. Recently, comprehensive definition of sexual has been proposed, defining it as any that arises from fitness differences associated with nonrandom success the competition for access to gametes fertilization. Previous research on discrete traits demonstrated non-random mating can be effectively quantified using Jeffreys (or symmetrized Kullback-Leibler) divergence, capturing information acquired through influenced by mutual propensities instead random occurrences. This novel theoretical framework allows detecting assessing strength assortative mating. In this study, we aim achieve two primary objectives. Firstly, demonstrate seamless alignment previous development, rooted theory propensity, aforementioned selection. Secondly, extend encompass quantitative traits. Our findings reveal measuring gain relative pattern. The connection indices classical measures is established. Additionally, if are normally distributed, measure underlying function square correlation coefficient, taking values within non-negative real number set [0, +∞). It worth noting same divergence captures both interesting provides common context help simplify study patterns.

Язык: Английский

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When Older Males Sire More Offspring—Increased Attractiveness or Higher Fertility?

Behavioral Ecology and Sociobiology, Год журнала: 2022, Номер 76(5)

Опубликована: Апрель 23, 2022

In birds with extrapair mating, older males usually have higher fertilization success than younger males. Two hypotheses can potentially explain this pattern: 1) females prefer older, and often more ornamented males, or 2) invest in reproduction fertility Here we studied factors associated age-related male a population of barn swallows Hirundo rustica Canada. We document that increased gradually up to minimum age four-year old. The effect was especially strong for the number offspring obtained occurrence second brood. also an early start breeding spring. length elongated outermost tail feathers, postulated ornament preferred by females, (in both sexes), but it not significant predictor within classes. Male traits, testis size, sperm motility velocity, significantly across groups. Our results suggest is due their reproductive investments longer tails are adaptation arrival on grounds.The swallow socially monogamous passerine extensive mating. found become successful siring withinpair as they older. Their effort indicated larger testes, motile sperm, earlier outer feathers sexes, long did enhance among same age. Long probably rapid migration grounds. findings commonly observed increase better explained life history theory sexual selection theory.The online version contains supplementary material available at 10.1007/s00265-022-03170-0.

Язык: Английский

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Sex-specific assumptions and their importance in models of sexual selection

Trends in Ecology & Evolution, Год журнала: 2023, Номер 38(10), С. 927 - 935

Опубликована: Май 26, 2023

Sexual selection is a field coloured by tension and contrasting views. One contested claim the causal link from definition of sexes (anisogamy) to divergent on sexes. Does theory truly engage with this claim? We survey extent which makes sex-specific assumptions engages anisogamy, discuss these issues in broader context. The majority sexual does not While invalidate existing results, debates criticisms regarding force us think deeper about its logical foundations. ways strengthen foundations relaxing central assumptions.

Язык: Английский

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Is there a trade-off between sperm production and sexual weaponry in the Amazon River prawn Macrobrachium amazonicum (Heller, 1862)?

Zoology, Год журнала: 2022, Номер 153, С. 126029 - 126029

Опубликована: Июль 6, 2022

Язык: Английский

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Behavioral threat and appeasement signals take precedence over static colors in lizard contests

Behavioral Ecology, Год журнала: 2024, Номер 35(4)

Опубликована: Июнь 4, 2024

Abstract The interplay between morphological (structures) and behavioral (acts) signals in contest assessment is still poorly understood. During contests, males of the common wall lizard (Podarcis muralis) display both (i.e. static color patches) raised-body display, foot shakes) traits. We set out to evaluate role these putative determining outcome intensity contests by recording agonistic behavior ten mesocosm enclosures. find that are typically won with relatively more black coloration, which also aggressive. However, coloration does not seem play a rival assessment, traits stronger predictors winner aggression than prior experience, morphology, coloration. Contest mainly driven resource- self-assessment, probably using threat (raised-body displays) de-escalation (foot communicate their willingness engage/persist fight. Our results agree view used during associated mutual evaluation developmentally-fixed attributes, instead animals monitor each other ensure motivation matched rival. emphasize importance testing effect on receiver discuss social recognition territorial species may select receivers neglect potential conveying information sex, age, or intrinsic quality.

Язык: Английский

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

Royal Society Open Science, Год журнала: 2024, Номер 11(6)

Опубликована: Июнь 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.

Язык: Английский

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