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Data from: Extra-group mating increases inbreeding risk in a cooperatively breeding bird
- 负责人：
- DOI：
- doi:10.5061/dryad.v8q6c
- 摘要：
- In many cooperatively-breeding species females mate extra-group, the adaptive value of which remains poorly understood. One hypothesis posits that females employ extra-group mating to access mates whose genotypes are more dissimilar to their own than their social mates’, so as to increase offspring heterozygosity. We test this hypothesis using life-history and genetic data from 36 cooperatively-breeding white-browed sparrow weaver (Plocepasser mahali) groups. Contrary to prediction, a dominant female’s relatedness to her social mate did not drive extra-group mating decisions and, moreover, extra-group mating females were significantly more related to their extra-group sires than their social mates. Instead, dominant females were substantially more likely to mate extra-group when paired to a dominant male of low heterozygosity, and their extra-group mates (typically dominants themselves) were significantly more heterozygous than the males they cuckolded. The combined effects of mating with extra-group males of closer relatedness but higher heterozygosity resulted in extra-group-sired offspring that were no more heterozygous than their within-group-sired half-siblings. Our findings are consistent with a role for male-male competition in driving extra-group mating and suggest that the local kin structure typical of cooperative breeders could counter potential benefits to females of mating extra-group by exposing them to a risk of inbreeding.
Data from: We happy few: using structured population models to identify the decisive events in the lives of exceptional individuals
- 负责人：
- DOI：
- doi:10.5061/dryad.3b56d
- 摘要：
- (such as Cedrela and Ordosica), it is also a matter of growing fast. We focus on reproductive skew, but our methods are broadly applicable and can be use
Data from: Post-copulatory sexual selection allows females to alleviate the fitness costs incurred when mating with senescing males
- 负责人：
- DOI：
- doi:10.5061/dryad.47fd240
- 摘要：
- e reproductive bout, post-copulatory sexual selection that operates either through sperm competition or cryptic female choice might allow females to skew
Data from: Visual obstruction and vigilance: a natural experiment
- 负责人：
- DOI：
- doi:10.5061/dryad.51p67
- 摘要：
- obstructions can also skew the perception of group size and inter-individual distances and impair the detection of alarm signals by conspecifics. These change
Data from: Feed-backs among inbreeding, inbreeding depression in sperm traits and sperm competition can drive evolution of costly polyandry
- 负责人：
- DOI：
- doi:10.5061/dryad.03v7p
- 摘要：
- ll due to compound effects on the variances in sex-specific reproductive success and paternity skew. Purging of deleterious mutations did not eliminate
Data from: Age-graded dominance hierarchies and social tolerance in packs of free-ranging dogs
- 负责人：
- 关键词：
- social tolerance;Canis lupus familiaris;Body Size;dominance;Domestic dogs;Canis lupus;age;wolves
- DOI：
- doi:10.5061/dryad.34k42
- 摘要：
- reproductive skew than wolves, possibly because access to easily available human-derived food may have relaxed within-group competition. We investigated
Data from: Stochastic evolutionary demography under a fluctuating optimum phenotype
- 负责人：
- DOI：
- doi:10.5061/dryad.101h0
- 摘要：
- - and individual-based simulations. The log population size is approximately reverse gamma distributed, with a negative skew causing an excess of low relative to high
Data from: Genetic parentage analysis confirms a polygynandrous breeding system in the European grayling (Thymallus thymallus)
- 负责人：
- DOI：
- doi:10.5061/dryad.0qr3g
- 摘要：
- in reproductive success and thus reproductive skew strongly impacts on the effective number of breeders and thus the long-term effective population size (Ne). Fishes
Data from: Mating patterns and determinants of individual reproductive success in brown trout (Salmo trutta) revealed by parentage analysis of an entire stream living population
- 负责人：
- DOI：
- doi:10.5061/dryad.1597
- 摘要：
- matings and large reproductive skew for both sexes, but particularly so in males. We found no impact of individual neutral genetic variation or bet
Data from: Polybrominated diphenyl ether (DE-71) exposure skews phenotypic sex ratio, and alters steroid hormone levels and steroidogenic enzyme activities in juvenile Silurana tropicalis
- 负责人：
- DOI：
- doi:10.5061/dryad.q4qd540
- 摘要：
- liver necrosis and abnormal ovary development; and reduced circulating and gonadal androgens resulting in a phenotypic skew in sex ratio toward the female sex
