WebFeb 20, 2002 · Sex ratio theory attempts to explain variation at all levels (species, population, individual, brood) in the proportion of offspring that are male (the sex ratio). … WebSex-biases in populations can have important implications for species’ social biology, population demography and mating systems. It has recently been suggested that in …
Operational sex ratio - Wikipedia
WebSep 19, 2024 · By using data from 188 bird species and phylogenetically controlled analyses, we show that cooperatively breeding species have more male-biased ASRs … WebNov 21, 2024 · To determine whether the adult sex ratio at birth was predictive of what the sex ratio would be when offspring begin to breed, we tested for temporal autocorrelation in adult sex ratio across years . … cheap mountain bike helmet
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WebJun 16, 2009 · Instantaneous estimates of the operational sex ratio (OSR) during the breeding season fail to distinguish between males who mate and males who do not, and overestimate the intensity of sexual selection that exists over the entire breeding season. Shown are two scenarios illustrating a hypothetical breeding season in which 5 females … WebUnequal breeding sex ratio can significantly reduce effective population size, allowing a rare neutral allele to jump to a high frequency through genetic drift. However, this one … WebApr 5, 2024 · The black dots show the sex ratios from each breeding pair at both 29.5 and 31.5 °C. The lines connecting the dots can be used to estimate a pivotal temperature (i.e. where the black lines cross the gray dotted line). The heavy blue line shows the average slope of all six lines from the breeding pairs. Letters A, B, and C are references for ... cheap mountain acreage for sale in tennessee