Avian Helpers at the Nest: Are they Psychologically Castrated?
نویسندگان
چکیده
منابع مشابه
Sex-ratio optimization with helpers at the nest.
In many cooperatively breeding animals, offspring produced earlier in life assist their parents in raising subsequent broods. Such helping behaviour is often confined to offspring of one sex. Sex-allocation theory predicts that parents overproduce offspring of the helping sex, but the expected degree of sex-ratio bias was thought to depend on specific details of female and male life histories, ...
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Considerable research on helpers-at-the-nest demonstrates the positive effects of firstborn daughters on a mother's reproductive success and the survival of her children compared with women who have firstborn sons. This research is largely restricted to agricultural settings. In the present study we ask: "Does 'daughter first' improve mothers' reproductive success in a hunting and gathering con...
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15 صفحه اولInstrumentality boosts appreciation: helpers are more appreciated while they are useful.
We propose that in social interactions, appreciation of a helper depends on that helper's instrumentality: The more motivated one is to accomplish a goal, and the more one perceives a helper as able to facilitate that goal, the more appreciation one will feel for that helper. Four experiments supported this instrumentality-boost hypothesis by showing that beneficiaries felt more appreciation of...
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The current investigation evaluated the psychological profiles of applicants to seminary who were identified as being either homosexual or heterosexual in orientation. The MMPI-2 from 63 seminary applicants conducted between 1990 and 2004 was reviewed. Results indicate that 49 applicants (78%) identified themselves as being heterosexual while 14 applicants (22%) identified themselves as being h...
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ژورنال
عنوان ژورنال: Ethology
سال: 2010
ISSN: 0179-1613,1439-0310
DOI: 10.1111/j.1439-0310.1986.tb00585.x