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Mace R 《Behavioral ecology and sociobiology》1996,38(2):75-81
Demographic data from 848 Gabbra households are used to examine the relationships between herd size and reproductive success
in relation to sex, in a traditional, pastoralist population. The number of camels in the household herd has a significant
positive effect on the reproductive success of both men and women, although the effect of wealth is greater for men, as predicted
from evolutionary theory. The greater the number of elder brothers a man has, the lower his reproductive success, as a result
of a smaller initial herd and a later age at marriage. This is not true for women –number of elder sisters does not have a
measurable effect on a woman’s fertility, although it does have a small, negative effect on the size of her dowry. These results
are interpreted as competition between same-sex siblings for parental investment, in the form of their father’s herd, which
is more intense between sons than daughters as parental investments are greatest in males.
Received: 30 June 1995/Accepted after revision: 23 October 1995 相似文献
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