نتایج جستجو برای: social reproduction
تعداد نتایج: 671872 فیلتر نتایج به سال:
A major transition in evolution is the origin of a division between reproduction and work among individuals. Nowhere is this divide more striking than in social insects, where workers rarely produce offspring even though they are often capable of reproduction should the queen or king die. The molecular mechanisms that control worker reproduction remain largely unknown. We used a combination of ...
Toward the end of the breeding season, migratory songbirds face crucial tradeoffs between the timing of reproduction, molt, and migration. Using stable hydrogen isotopes, we show that male American redstarts investing in high levels of reproduction late in the season adopt a unique strategy of combining molt and migration. Tail feathers molted during migration also reflect less orange-red light...
Concerns regarding the follow-up of children conceived after assisted reproduction in Latin America.
Children born through assisted reproduction are not usually followed up in Latin America. However, in spite of all the social-economic and cultural complexity of this part of the world, professionals involved in assisted reproduction should not relinquish the responsibility of following up these children. In May 2002, the Centre for Human Reproduction Sinhá Junqueira, started a specific project...
In this article we examine how partner choice and strategies of social reproduction among the Wampar of northeastern Papua New Guinea are implicated in currently pressing questions about the future of Wampar as a socio-cultural unit. We use long-term qualitative and quantitative data based on fieldwork and census surveys conducted between 1954 and 2013 from the village of Gabsongkeg to analyse ...
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