Environmental sex determination mechanisms in reptiles magazine in Tweed Heads

The fertilization of rabbit ova in relation to ovulation. Skjervold HJames J. Van Wagtendonk-de Leeuw. Parity and treatment by parity interactions were tested with residual error. Louis, MO.

Average energy intake among pregnant women carrying a boy compared with a girl. Distortions in the sex ratio have been attributed to factors other than nutrition of the mother [see 14 ]. The greater variance of males in polygynous species, both in terms of early mortality and reproductive success, is well established in wild populations.

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Abstract Mammals usually produce approximately equal numbers of sons and daughters, but there are exceptions to this general rule, as has been observed in ruminant ungulate species, where the sex-allocation hypothesis of Trivers and Willard has provided a rational evolutionary underpinning to adaptive changes in sex ratio.

Int J Fertil 15 : — Theriogenology 46 : — Sign In.

Caffeine-mediated changes of sex ratio in Chinese hamsters, Cricetulus griseus. Crews D. Offspring sex ratio in women with android body fat distribution. Cited by: 3 articles PMID: The provisioned group produced a male-biased sex ratio of pouched young, while the controls produced males to females in about the same number.

Diet 1 was low in saturated fat LF , with the majority of calories provided as sugars and complex carbohydrate.

Environmental sex determination mechanisms in reptiles magazine in Tweed Heads

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