human sexual dimorphism in size may be triggered by environmental cues
نویسندگان
چکیده
منابع مشابه
Human sexual dimorphism in size may be triggered by environmental cues.
Evolutionary biologists mostly assume that polygyny increases sexual dimorphism in size because, under polygyny, larger males monopolize mating opportunities and pass on their 'large male' genes to their sons. Available data on parent-child correlations in height among humans (Homo sapiens) do not support the crucial assumption that height is transmitted along sex lines. This paper instead sugg...
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Evidence for phenotypic plasticity in brain size and the size of different brain parts is widespread, but experimental investigations into this effect remain scarce and are usually conducted using individuals from a single population. As the costs and benefits of plasticity may differ among populations, the extent of brain plasticity may also differ from one population to another. In a common g...
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Several hypotheses have been proposed to explain the direction and extent of sexual size dimorphism in anurans (in which males are usually smaller than females) as a result of sexual selection. Here, we present an analysis to test the hypothesis that sexual dimorphism in anurans is largely a function of differences between the sexes in life-history strategies. Morphological and demographic data...
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1 Department of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston, TX. 2 Department of Obstetrics and Gynecology, University of Cambridge, Cambridge, United Kingdom. 3 Department of Obstetrics and Gynaecology, Royal College of Surgeons in Ireland, Dublin, Ireland. 4 Department of Obstetrics and Gynecology, University of Utah and Intermountain HealthCare, Salt Lake City, U...
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Argyroneta aquatica is the only spider that spends its whole life under water, and one of very few in which males are bigger than females. We hypothesized that the unusual ecology of the water spider is responsible for its exceptional sexual size dimorphism. If ecological parameters influence optimal body size for locomotion, the size of the more mobile sex (males) is expected to vary more betw...
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ژورنال
عنوان ژورنال: Journal of Biosocial Science
سال: 2004
ISSN: 0021-9320,1469-7599
DOI: 10.1017/s0021932004007047