The sex ratio in embryos and adults examined revealed about 53 per cent females.
sex ratio of opossums trapped was approximately 1:1; 59 males to 58 females.
Even the sex ratio of adult deer killed in wolf-free areas shows a preponderance of males (Erickson et al. 1961).
Such movements are revealed by trapping procedures that yield deviations from the expected 1:1 sex ratio.
I regard the summer sex ratio as a distorted one, brought about by the greater activity of the males in the breeding season.
Judging from trends in the small samples available, sex ratio in hatchlings is approximately 1:1.
sex ratio n.
The proportion of males to females in a given population, usually expressed as the number of males per 100 females at a specific stage in life, especially at conception, birth, and a given stage between birth and death.
The ratio of the numbers of males to females affected by a particular disease or trait.