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36 results for “pairing success”
Data from: Age-dependent trajectories differ between within-pair and extra-pair paternity success
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Data from: Beyond the alpha: Extra-pair paternities and male reproductive success in a primate multilevel society
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Data from: Are there indirect fitness benefits of female extra-pair reproduction? Lifetime reproductive success of within-pair and extra-pair offspring
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Data from: Female and male genetic effects on offspring paternity: additive genetic (co)variances in female extra-pair reproduction and male paternity success in song sparrows (Melospiza melodia)
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The evolutionary genetics of paternal care: how good genes and extra-pair copulation affect the trade-off between paternal care and mating success
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Data for: Experimentally advancing morning emergence time does not increase extra-pair siring success in blue tit males
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Data from: Variance in within-pair reproductive success influences the opportunity for selection annually and over the lifetimes of males in a multi-brooded songbird
<p>In socially monogamous species, male reproductive success consists of 'within-pair' offspring produced with their socially-paired mate(s), and 'extra-pair' offspring produced with additional females throughout the population. Both reproductive pathways offer distinct opportunities for selection in wild populations, as each is composed of separate components of mate attraction, female fecundity, and paternity allocation. Identifying key sources of variance and covariance among these components is a crucial step towards understanding the reproductive strategies that males use to maximize fitness both annually and over their lifetimes. We use 16 years of complete reproductive data from a population of black-throated blue warblers (<i>Setophaga caerulescens</i>) to partition variance in male annual and lifetime reproductive success, and thereby identify if the opportunity for selection varies over the lifetimes of individual males and what reproductive strategies likely favor maximum lifetime fitness. The majority of variance in male reproduction was attributable to within-pair success, but the specific effects of individual components of variance differed between total annual and total lifetime reproductive success. Positive overall lifetime covariance between within-pair and extra-pair components indicates that males able to maximize within-pair success, particularly with double-brooding females, likely achieve higher overall lifetime fitness via both within-pair and extra-pair reproductive pathways.</p>
Data from: Simulated hatching failure predicts female plasticity in extra-pair behavior over successive broods
While many studies have investigated the occurrence of extra-pair paternity (EPP) and its adaptive significance in wild population of birds, we still know surprising little about the plasticity in mating behavior of females at the individual level and how it affects the patterns of paternity. To address this question, we focused on the direct fertility benefit hypothesis for the function of EPP and studied if female birds react in extra-pair mating behavior after reproductive failures using a wild population of the Japanese great tit, Parus minor, a socially monogamous passerine with a moderate frequency of EPP and a high multiple brooding rate. We simulated hatching failure by replacing with artificial eggs during the egg laying period to investigate if females subsequently altered their mating behavior and became more promiscuous to improve reproductive success in their following clutches. The proportion of extra-pair offspring per clutches of both experimental and control pairs increased in the second clutches (replacement and repeat), but compared to the control pairs, the increase in the experimental pairs was significantly greater. The present study suggests that individual females appear to be making decisions based on specific cues and flexibly altering mating behavior in adaptive ways. Also, our results are compatible with one of the long-debated hypotheses for the evolutionary maintenance of EPP which predicts females gain direct fitness benefit through increased reproductive success from mating multiply.
Data from: Pair bonds, reproductive success and rise of alternate mating strategies in a social carnivore.
Monogamy is commonly observed across a wide variety of species and taxa and arises when young are altricial, parental investment in young is high, and mate monopolization is generally not possible. In such species, pairs may bond for multiple breeding seasons while successfully rearing young. Individuals, however, may attempt to bypass the dominant mating strategy particularly when breeding opportunities are limited. Currently, we do not know how pair bond duration affects the efficacy of alternative mating strategies in populations with a monogamous mating system. Additionally, inferences about pair bond effects on reproductive success (i.e., both clutch size and recruitment) are largely limited to long-lived birds and little is known about effects on mammalian cooperative breeders. I used genetic sampling and pedigrees to examine the effects of pair bond duration on reproductive success (i.e., litter size, recruitment) and mating strategies in a population of gray wolves (Canis lupus) in Idaho USA. There was a positive, marginally significant relationship between pair bond duration and apparent survival of offspring. Increased pair bond duration was also associated with a dampening in the prevalence of other alternative mating strategies such as sneaker males and polygamy. The selective advantage of alternative mating strategies are a combination of population, group (for applicable species), individual, and social influences such as pair bonds. The distribution of pair bonds in a monogamous population affects the selective advantage, and hence frequency, of various mating strategies observed.
The contribution of extra-pair paternity to the variation in lifetime and age-specific male reproductive success in a socially monogamous species
<p>In socially monogamous species, extra-pair paternity (EPP) is predicted to increase variance in male reproductive success beyond that resulting from genetic monogamy, thus increasing the 'opportunity for selection' (maximum strength of selection that can act on a trait). This prediction is challenging to investigate in wild populations because lifetime reproduction data are often incomplete. Moreover, age-specific variances in reproductive success have been rarely quantified. We analysed 21 years of near-complete social and genetic reproduction data from an insular population of Seychelles warblers (<em>Acrocephalus sechellensis</em>). We quantified the contribution of EPP to lifetime and age-specific opportunities for selection in males. We also compared the variance in male genetic reproductive success (RS) vs. social ('apparent') reproductive success (RSap) to assess if EPP increased the opportunity for selection over that resulting from genetic monogamy. EPP contributed substantially to the variance in lifetime RS, despite not causing a statistically significant excess of this over the variance in lifetime RSap. Partitioning the opportunity for selection into age-specific (co)variance components, showed that EPP provided a substantial contribution at most ages, varying with age. Therefore, in Seychelles warblers EPP likely provides an age-dependent contribution to the opportunity for selection, which can influence evolutionary processes in age-structured populations.</p>
Data from: Double decomposition: decomposing the variance in subcomponents of male extra-pair reproductive success
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Data from: Pair bonds, reproductive success and rise of alternate mating strategies in a social carnivore.
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The contribution of extra-pair paternity to the variation in lifetime and age-specific male reproductive success in a socially monogamous species
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Data from: Simulated hatching failure predicts female plasticity in extra-pair behavior over successive broods
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Data from: Variance in within-pair reproductive success influences the opportunity for selection annually and over the lifetimes of males in a multi-brooded songbird
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Data from: Decomposing variation in male reproductive success: age-specific variances and covariances through extra-pair and within-pair reproduction
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