DO RINGTAILED LEMURS EXHIBIT A SKEWED BIRTH SEX RATIO DEPENDING ON SOCIAL AND ENVIRONMENTAL CONDITIONS? A PRELIMINARY ANALYSIS OF A WILD POPULATION
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概要
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In a 13-year study, we examined the birth sex ratio (BSR) of wild ringtailed lemurs at Berenty Reserve in Madagascar. Their BSR represented an equal sex ratio at the population level, irrespective of population change. High-ranking females did not always overproduce sons or daughters. In newly formed groups, females did not always overproduce daughters, and the BSR of young females was similar to an equal sex ratio. Thus, our data do not support the Trivers–Willard, local resource competition–population, or local resource enhancement hypotheses. Only one significant skewed BSR was observed: low-ranking females in medium-sized groups overproduced sons. This finding may support the local resource competition–individual hypothesis, but does not do so robustly.
- 2013-03-25
著者
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Takahata Yukio
School Of Policy Studies Kwansei Gakuin University
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Yukio TAKAHATA/Naoki
School of Policy Studies, Kwansei Gakuin University/Professor Emeritus, The Center for African Area Studies, Kyoto UniversityPrimate Research Institute, Kyoto University/Graduate School of Asian and African Area Studies, Kyoto University/Graduate School o
関連論文
- INTER- AND WITHIN-TROOP COMPETITION OF FEMALE RING-TAILED LEMURS: A PRELIMINARY REPORT
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- Influence of group size on reproductive success of female ring-tailed lemurs : distinguishing between IGFC and PFC hypotheses
- Long-term changes in dominance ranks among ring-tailed lemurs at Berenty Reserve, Madagascar
- DO RINGTAILED LEMURS EXHIBIT A SKEWED BIRTH SEX RATIO DEPENDING ON SOCIAL AND ENVIRONMENTAL CONDITIONS? A PRELIMINARY ANALYSIS OF A WILD POPULATION
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