| Autor: |
Meij, J.J., Bodegom, D. van, Ziem, J.B., Amankwa, J., Polderman, A.M., Kirkwood, T.B.L., De Craen, A.J.M., Zwaan, B.J., Westendorp, R.G.J. |
| Jazyk: |
angličtina |
| Rok vydání: |
2009 |
| Předmět: |
|
| Zdroj: |
STARTPAGE=1014;ENDPAGE=1023;TITLE=None |
| Popis: |
A central paradigm in life-history theory is the trade-off between offspring number and quality. Several studies have investigated this trade-off in humans, but data are inconclusive, perhaps because prosperous socio-cultural factors mask the trade-off. Therefore, we studied 2461 offspring groups in an area under adverse conditions in northern Ghana with high fertility and mortality rates. In a linear mixed model controlling for differences in age and tribe of the mother and socioeconomic status, each additional child in the offspring group resulted in a 2.3% (95% CI 1.9–2.6%, P < 0.001) lower proportional survival of the offspring. Furthermore, we made use of the polygamous population structure and compared offspring of co-wives in 388 households, thus controlling for variation in resources between compounds. Here, offspring survival decreased 2.8% (95% CI 2.3–4.0%, P < 0.001) for each increase in offspring number. We interpret these data as an apparent quality–quantity trade-off in human offspring. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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