Here, the sex ratios of three residential, Icelandic duck populations (Eurasian Wigeon Anas penelope, Mallard A. platyrhynchos and Common Eider Somateria mollissima) were evaluated and compared with data from Western Europe. The sex ratio of Icelandic Eurasian Wigeon was even (1:1), in contrast ...
In the wake of the one-child policy of 1979, China experienced an unprecedented rise in the sex ratio at birth (ratio of male to female births). In cohorts... EJ Sharygin,AY Ebenstein - 《Social Science Electronic Publishing》 被引量: 146发表: 2009年 On the Relationship Between Country ...
Sex-role spillover is the carryover of gender-based roles into the work setting. It is exacerbated by having a highly skewed ratio of the sexes at work. The sex roles associated with the majority sex become incorporated into the work roles. In male-dominated jobs, activity, rationality, and...
The young/adult ratio of the sample was 1.60, which suggests that the hunting pressure has been relatively low in this area. Six percent of the animals were 5 years or older which compares to those taken in Hokkaido, but is higher than those in Europe and North America. The sex ratio ...
Sex-ratio at birth in families with previous girls is worse than those with a boy. Our aim was to prospectively study in a large maternal and child unit sex-ratio against previous birth sex and use of traditional medicines for sex selection. Sex-ratio among mothers in families with a previo...
Trivers and Willard (1973) hypothesized that under assumptions valid for many polygynous animals, females should be capable of varying the sex ratio of their offspring according to their own condition. In the absence of any additional constraints the predicted variation is even greater than Trivers ...
Here, in a coastal seabird, the European shag (Phalacrocorax aristotelis), we studied the influence of climate (North Atlantic Oscillation, NAO; Sea Surface Temperature, SST) on two sex-related population parameters: fledgling sex ratio and sex-specific dispersal. We found that fledgling sex ...
The sex ratio of Indias population has been on the declining course during the last one century currently indicating a massive deficit of females. Sex ratio trends vary considerably across the regions of India consistent with the degree of gender inequalities in education employment and empowerment in...
We investigated the sex ratio of children of pesticide workers who produced the biocide trichlorophenol and the herbicide 2,4,5-trichlorophenoxy acetic acid from 1961 to 1988 in the city of Ufa, Bashkortostan, Russia. We measured exposure of the two related cohorts to 2,3,7,8-tetrachlorodibenz...
In mammals, high parental testosterone levels present around the time of conception are thought to skew offspring sex ratio toward sons. The second to fourth digit ratio (digit ratio) is now widely accepted as a negative correlate of prenatal testosterone. Thus, we investigated the association betw...