Web1992). Thus, sex ratios observed during juvenile migration will likely be intermediate between pri-mary and adult sex ratios (e.g., Lehikoinen et al. 2008a, b). Large numbers of juveniles have been caught on their first southward migration at sev-eral sites in Europe. The timing of migration should not markedly differ between male and fe- Web6 aug. 2009 · This is an important advantage as sex ratio data are best expressed as proportions (sex ratio = males/ (males + females)) and deviations are expected to …

REVIEWS Recent developments in sex ratio studies - University of …

Webchange. Interestingly, we also found that the modified CTE explained up to 64% of variation in sex ratios in a Type II TSD species, suggesting that our modifications will be useful … Web10 sep. 2007 · Sex ratio studies have been very successful in behavioral and evolutionary ecology, providing an elegant test of theory (Charnov 1982; Godfray 1994; Hardy 2002; … birchmeier rex 15 battery backpack sprayer

The Sex Ratio: A Biological and Statistical Conundrum - Cell

WebRecent studies attempting to test evolutionary explanations of biased sex ratios in human populations are here critically reviewed. It is suggested that closer attention to a broad range of ecological and social factors that may affect differential investment in sons and daughters might contribute to better evolutionary understanding of the patterns observed. The … WebHuman sex ratios, either at birth or in the population as a whole, can be reported in any of four ways: the ratio of males to females, the ratio of females to males, the proportion of … Web2 dec. 2024 · Author summary The human sex ratio at birth (SRB), usually slightly greater than 1/2, have been reported to vary in response to a wide array of exogenous factors. In the literature, many such factors have been posited to be associated with higher or lower SRBs, but the studies conducted so far have focused on no more than a few factors at a … dallas industrial machinery injury attorney