Hormonal control of behavior in the Japanese quail.
01 Oct 1972-Journal of Comparative and Physiological Psychology (American Psychological Association)-Vol. 81, Iss: 1, pp 27-36
About: This article is published in Journal of Comparative and Physiological Psychology.The article was published on 1972-10-01. It has received 283 citations till now. The article focuses on the topics: Coturnix & Quail.
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01 Dec 1998
TL;DR: Geary presents a theoretical bridge linking parenting, mate choices, and competition, with children's development and sex differences in brain and cognition, in a lively and nuanced application of Darwin's insight to help explain the authors' heritage and their place in the natural world.
Abstract: Why do girls tend to earn better grades in school than boys? Why are men still far more likely than women to earn degrees in the fields of science, technology, engineering, and mathematics? And why are men on average more likely to be injured in accidents and fights than women? These and many other questions are the subject of both informal investigation in the media and formal investigation in academic and scientific circles. In his landmark book "Male, Female: The Evolution of Human Sex Differences", author David Geary provided the first comprehensive evolutionary model to explain human sex differences. Using the principles of sexual selection such as female choice and male-male competition, the author systematically reviewed and discussed the evolution of sex differences and their expression throughout the animal kingdom, as a means of not just describing but explaining the same process in Homo sapiens. Now, over ten years since the first edition, Geary has completed a massive update, expansion and theoretical revision of his classic text. New findings in brain and genetic research inform a wealth of new material, including a new chapter on sex differences in patterns of life history development; expanded coverage of genetic research (e.g. DNA finger printing to determine paternity as related to male-male competition in primates); fatherhood in humans; cross-cultural patterns of sex differences in choosing and competing for mates; and, genetic, hormonal, and socio-cultural influences on the expression of sex differences. Finally, through his motivation to control framework (introduction in the first edition and expanded in "The Origin of Mind", 2005), Geary presents a theoretical bridge linking parenting, mate choices, and competition, with children's development and sex differences in brain and cognition. The result is an even better book than the original - a lively and nuanced application of Darwin's insight to help explain our heritage and our place in the natural world.
1,156 citations
TL;DR: The quail POM constitutes an exceptional model for the analysis of steroid-induced brain plasticity in a functionally relevant context and appears to be a key target for steroids in the activation of male copulatory behavior.
281 citations
TL;DR: The persistence of song after castration contrasts with the abolition of song by castration in other birds, and this may be related to the natural history of zebra finches.
Abstract: Castration of adult male zebra finches (Poephila guttata, Estrildidae) reduces their singing rate and the tempo of song, but castrates continue to sing song identical in form to preoperative song. Injection or implantation of testosterone propionate (TP) but not of vehicle alone reverses the changes produced by castration. Castration or partial castration also reduces the frequency of courtship, copulation, and aggression. Androgen (TP) replacement reverses these changes, but control injections do not. The persistence of song after castration contrasts with the abolition of song by castration in other birds, and this may be related to the natural history of zebra finches.
269 citations
TL;DR: It was shown that the song of the male pied flycatcher is dependent upon androgens, and the testosterone treatment prolonged territorial behaviour, and a higher percentage of nests without a feeding male during the nestling period was found in the experimental area.
256 citations
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TL;DR: The cloacal protrusion may serve as a convenient external index of androgen, permitting repeated measurement without operation on or killing of the animal.
Abstract: Changes in photoperiod cause correlated changes in testes, cloacal glands, cloacal foam, and reproductive behavior of male Japanese quail. The cloacal protrusion may serve as a convenient external index of androgen, permitting repeated measurement without operation on or killing of the animal.
221 citations
TL;DR: The breeding condition of the males was never insensitive to long days, suggesting that adult male coturnix are nonphotorefractory, and TP-induced regression of the testes was reversible by withdrawing the hormone and shifting the males to long photoperiods.
109 citations
TL;DR: Estrogen administration depresses the testes by inhibiting pituitary gonadotropin production; the mature ovary is relatively more resistant to exogenous estrogens.
Abstract: Publisher Summary Domestic birds have been important research tools from the earliest days of endocrinology. With the advent of potent and inexpensive materials and economically feasible methods of administration, endocrinology has, in turn, served the poultry industry; endocrine treatments have been developed to enhance the quality of poultry meat and to improve the economy of poultry enterprises. Effects of estrogen administration to birds include several alterations in blood and liver biochemistry, mostly related to the normal requirements of egg production: (1) Stimulation of lipogenesis; (2) Increases in blood levels of nonultrafilterable calcium and phosphorus fractions and phosphatase, and with synergistic action of androgen, hyperossification of the skeleton; (3) Increased blood levels of various protein fractions, with evidence of more rapid protein synthesis and storage in the liver; (4) Increased blood levels of riboflavin, vitamin A, and biotin, but decreased citric acid levels; (5) Increased anti-thrombin activity and decreased percentage total red-cell volume. Estrogen administration depresses the testes by inhibiting pituitary gonadotropin production; the mature ovary is relatively more resistant to exogenous estrogens. Effects on other endocrine organs have not been unequivocally determined.
98 citations