Male condition and group heterogeneity predict extra-group paternity in a Neotropical bat

Behavioral Ecology and Sociobiology, Journal Year: 2020, Volume and Issue: 74(11)

Published: Oct. 20, 2020

Language: Английский

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Ornaments indicate parasite load only if they are dynamic or parasites are contagious

Evolution Letters, Journal Year: 2023, Volume and Issue: 7(3), P. 176 - 190

Published: May 3, 2023

Choosing to mate with an infected partner has several potential fitness costs, including disease transmission and infection-induced reductions in fecundity parental care. By instead choosing a no, or few, parasites, animals avoid these costs may also obtain resistance genes for offspring. Within population, then, the quality of sexually selected ornaments on which choice is based should correlate negatively number parasites host ("parasite load"). However, hundreds tests this prediction yield positive, negative, no correlation between parasite load ornament quality. Here, we use phylogenetically controlled meta-analysis 424 correlations from 142 studies wide range taxa evaluate explanations ambiguity. We found that weakly correlated overall, but relationship more strongly negative among can dynamically change quality, such as behavioral displays skin pigmentation, thus accurately reflect current load. The was transmit during sex. Thus, direct benefit avoiding be key driver parasite-mediated sexual selection. No other moderators, methodological details whether males exhibit care, explained substantial heterogeneity our data set. hope stimulate research inclusively considers many varied ways selection, epidemiology intersect.

Language: Английский

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Meta‐analysis shows the evidence for context‐dependent mating behaviour is inconsistent or weak across animals

Ecology Letters, Journal Year: 2021, Volume and Issue: 24(4), P. 862 - 875

Published: Jan. 20, 2021

Abstract Animals often need to invest significantly in mating behaviour order successfully mate. However, the expression of can be costly, especially unfavourable environments, so animals are expected adjust their a context‐dependent way mitigate these costs. I systematically searched literature for studies measuring animal (sexual signalling, response sexual signals or strength mate choice) more than one environment, and used phylogenetically controlled meta‐analysis identify environmental factors influencing behaviours. Across 222 studies, choice was context‐dependent, most strongly influenced by population density, sex ratio predation risk. average effect sizes were typically small. The amount signalling not related environment. Overall, this suggests that evidence across is surprisingly weak.

Language: Английский

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Nesting strategy shapes territorial aggression but not testosterone: A comparative approach in female and male birds

Hormones and Behavior, Journal Year: 2021, Volume and Issue: 133, P. 104995 - 104995

Published: May 14, 2021

Language: Английский

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Plumage colour saturation predicts long-term, cross-seasonal social dominance in a mutually ornamented bird

Animal Behaviour, Journal Year: 2021, Volume and Issue: 182, P. 239 - 250

Published: Oct. 25, 2021

Language: Английский

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Genetic monogamy despite frequent extrapair copulations in “strictly monogamous” wild jackdaws

Behavioral Ecology, Journal Year: 2019, Volume and Issue: 31(1), P. 247 - 260

Published: Oct. 8, 2019

"Monogamy" refers to different components of pair exclusiveness: the social pair, sexual partners, and genetic outcome encounters. Avian monogamy is usually defined socially or genetically, whereas quantifications behavior remain scarce. Jackdaws (

Language: Английский

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Breeding clusters in birds: ecological selective contexts, mating systems and the role of extrapair fertilizations

Animal Behaviour, Journal Year: 2018, Volume and Issue: 143, P. 145 - 154

Published: March 2, 2018

Language: Английский

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The cuckoldry conundrum

Evolutionary Anthropology Issues News and Reviews, Journal Year: 2024, Volume and Issue: 33(3)

Published: Feb. 10, 2024

Abstract Concerns about cuckoldry are a dominant theme in evolutionary studies of mating, frequently used to explain sex differences reproductive strategies. However, nonhuman species have shown that can be associated with important benefits. These insights not been well integrated the human literature, which continues focus on anticuckoldry tactics and negative repercussions for men. I evaluate two key assumptions central models cuckoldry: (1) men being tricked into investing nonbiological offspring (2) investment is wasted. The ethnographic data fatherhood shows concepts pater genitor complex locally constructed ideas often include explicit knowledge extra‐pair paternity, countering idea nonpaternity results from trickery. Furthermore, rather than “waste,” paternity loss gains men, helping why invest offspring.

Language: Английский

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Social group composition modulates the role of last male sperm precedence in post-copulatory sexual selection

Journal of Evolutionary Biology, Journal Year: 2023, Volume and Issue: 36(8), P. 1102 - 1115

Published: June 21, 2023

In many species, the order in which males mate with a female explains much of variation paternity arising from post-copulatory sexual selection. Research Drosophila suggests that mating may account for majority variance male reproductive success. However, effects on bias might not be static but could potentially vary social or environmental factors. To test this idea, we used an existing dataset, collated experiment previously published (Morimoto et al., PLoS One, 11, 2016, e0154468), addition unpublished data same experiment. These previous experiments manipulated larval density melanogaster generated and body size, assembled groups individuals different sizes, measured success share focal males. The presented here provides information each male's frequency remated females ('repetitive matings'). We combined our reported to partition into repetitive matings across differed size composition females. found, as expected, explained considerable portion paternity. also found impact was influenced by groups. Specifically, tended last had greater advantage, displayed lower variance, containing heterogenous mixture sizes than single size. Repetitive only minor contribution all experiments. Overall, findings contribute growing research showing selection is subject socio-ecological influences.

Language: Английский

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High level of extrapair fertilization in individual Tibetan azure‐winged magpies and their adaptive responses

Journal of Avian Biology, Journal Year: 2018, Volume and Issue: 49(11)

Published: Sept. 24, 2018

Extrapair fertilizations (EPFs) occur widely in socially monogamous birds and result mixed parentage the brood. The response of an individual to these EPFs its social mate remains poorly investigated terms parental care for We addressed this question a cooperatively‐breeding corvid, azure‐winged magpie Cyanopica cyana . Parentage analysis indicated that 45% females 37% males engaged EPFs. There were 49% cooperative groups 36% bi‐parental nests with extrapair paternity (EPP) offspring, 22% 19% maternity (EPM) offspring. Based on identity we classified adults into four types: EPP offspring fathers/mothers, EPM cuckolded males/females, faithful males/females. A comparison provisioning rates among all types breeders showed 1) fathers had highest rate; 2) did not reduce care, compared fathers; 3) different differ their rates. Our findings suggest combination frequent opportunities, low costs cuckoldry, benefits establishing neighbourhood can explain why frequently Tibetan population magpie.

Language: Английский

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