Direct fitness benefits of group living in a complex cooperative society of carrion crows, Corvus corone corone
Direct fitness benefits of group living in a complex cooperative society of carrion crows, Corvus corone corone
复制标题
DOI：
10.1006/anbe.2002.2007
复制
发表时间：
2002-12-01
期刊：
影响因子：
2.5
通讯作者：
Ekman, J
中科院分区：
文献类型：
--
作者：
Baglione, V;Marcos, JM;Ekman, J
腐肉乌鸦的社会行为因种群而异。在西班牙北部，通过推迟出生、散布和/或将个体(通常为男性)迁入该领土，形成了合作繁殖群体。因此，在这个种群中，腐肉乌鸦要么以无辅助配对的形式繁殖，要么与不分散的1-2岁的帮手配对，要么与移民帮手配对，或者以混合群体的形式繁殖(既有迁徙的又有不分散的配对)。我们使用基于微卫星的基因分型系统来确定57只雏鸟(19窝)的亲缘关系。26%的雏鸟参与了一夫多妻制的交配，生殖在至少三个群体中的两性群体成员中共享。因此，无论男女，移民都可以通过群居来获得配偶，而繁殖不太可能涉及非分散者。这意味着，非分散者和移民从集体生活和在巢中提供帮助中获得了不同种类的好处。我们的基因数据证实，非分散者在出生领土上与其父母相关，因此出生扩散延迟会导致腐肉乌鸦形成家庭。在没有移民的群体中没有发现一夫多妻制的交配，这表明，在这个群体中，当社会性超出核心家庭的限制时，繁育者在他们的幼崽中失去了亲子关系。(C)2002年动物行为研究协会。爱思唯尔科学有限公司出版。版权所有。
The social behaviour of carrion crows varies between populations. In northern Spain cooperatively breeding groups form through delayed natal dispersal and/or immigration of individuals (usually males) into the territory. In this population, carrion crows therefore breed as either unassisted pairs, pairs with nondispersing 1-2-year-old helpers (nondispersers), pairs with immigrant helpers or mixed groups (pairs with both immigrants and nondispersers). We used a microsatellite-based genotyping system to determine the parentage of 57 nestlings (19 broods). Polygamous mating was involved in 26% of the broods and reproduction was shared among group members of both sexes in at least three groups. Immigrants of both sexes can therefore gain access to mates by living in a group, while reproduction is unlikely to involve nondispersers. This implies that nondispersers and immigrants gain different sorts of benefits from group living and helping at the nest. Our genetic data confirmed that nondispersers associated with their parents on the natal territory and therefore that delayed natal dispersal leads to family formation in the carrion crow. Polygamous mating was not found in groups without immigrants, suggesting that, in this population, breeders lose parentage in their brood when sociality is extended beyond the limit of the nuclear family. (C) 2002 The Association for the Study of Animal Behaviour. Published by Elsevier Science Ltd. All rights reserved.