Direct fitness benefits and kinship of social foraging groups in an Old World tropical babbler
Direct fitness benefits and kinship of social foraging groups in an Old World tropical babbler
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旧世界热带鹛鹛的直接健康益处和社会觅食群体的亲缘关系
DOI：
10.1093/beheco/arx196
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发表时间：
2018
影响因子：
2.4
通讯作者：
Taborsky, Michael
中科院分区：
文献类型：
--
作者：
Kaiser, Sara A;Martin, Thomas E;Oteyza, Juan C;Armstad, Connor;Fleischer, Robert C;Taborsky, Michael
分子研究表明，主要由非亲属组成的社会群体在群居脊椎动物中可能很普遍，但有利于这种社会性的好处还没有被很好地理解。在旧大陆，鸟类经常组成同种觅食群体，常年维持，后代通常分散到其他社会群体。我们测试了一个假设，即非繁殖群体成员在马来西亚婆罗洲通过繁殖机会(雄性)和幼体寄生(雌性)在热带灰喉八哥中获得直接健康益处，而非繁殖群体成员在很大程度上是无关的。在包含一个或多个繁殖对的社会群体中觅食(中位数=8名相同性别比例的群体成员)，但群体成员很少协助繁殖(67对繁殖中有9%有第三个帮手；表现出兼职合作繁殖)。虽然266个群体成员二联体中有20%是育种对中一个或两个成员的一级亲属，但80%是没有血缘关系的。雄性群体成员通过配对外和群体外父子关系获得直接的健康益处(73个后代中有25%)，这与他们与繁殖对的亲缘关系无关，并且随着群体规模的减少而增加。相比之下，雌性并没有通过幼虫寄生获得直接的健康益处。社会团体中的关联性和帮助程度较低，这表明大多数团体成员并不会通过帮助抚养不相关的后代来获得间接的健康益处。这些发现突显了研究社交对无关个体的好处的重要性，这些好处在很大程度上无助于扩大群体觅食的直接健康好处，而不是假设的生存好处。
Molecular studies have revealed that social groups composed mainly of nonrelatives may be widespread in group-living vertebrates, but the benefits favoring such sociality are not well understood. In the Old World, birds often form conspecific foraging groups that are maintained year-round and offspring usually disperse to other social groups. We tested the hypothesis that nonbreeding group members are largely unrelated and gain direct fitness benefits through breeding opportunities (males) and brood parasitism (females) in the tropical gray-throated babbler,Stachyris nigriceps, in Malaysian Borneo. Babblers foraged in social groups containing one or more breeding pairs (median = 8 group members of equal sex ratio), but group members rarely assisted with breeding (9% of 67 breeding pairs had a third helper; exhibiting facultative cooperative breeding). Although 20% of 266 group member dyads were first-order relatives of one or both members of the breeding pairs, 80% were unrelated. Male group members gained direct fitness benefits through extrapair and extra-group paternity (25% of 73 offspring), which was independent of their relatedness to the breeding pair and increased with decreasing group size. In contrast, females did not gain direct fitness benefits through brood parasitism. The low levels of relatedness and helping in social groups suggest that most group members do not gain indirect fitness benefits by helping to raise unrelated offspring. These findings highlight the importance of examining benefits of sociality for unrelated individuals that largely do not help and broaden the direct fitness benefits of group foraging beyond assumed survival benefits.
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影响因子：
4.8
作者：
Cockburn, A;Osmond, HL;Double, MC
通讯作者：
Double, MC
社会性：群居动物的行为
影响因子：
2.7
作者：
A. Ward;M. Webster
通讯作者：
M. Webster
合作繁殖的白眉鹩莺 (Sericornis frontalis) 的亲缘关系、一妻多夫制和族外父子关系
影响因子：
2.3
作者：
L. A. Whittingham;Peter O. Dunn;R. Magrath
通讯作者：
R. Magrath
尽管有充足的额外交配机会，但在热带鸟类中观察到的额外配对亲子关系较低
DOI：
--
发表时间：
2013
期刊：
影响因子：
--
作者：
C. Tarwater;J. Brawn;J. Maddox
通讯作者：
J. Maddox
婆罗洲鸟类：文莱、沙巴、沙捞越和加里曼丹
DOI：
--
发表时间：
2009
期刊：
影响因子：
--
作者：
S. Myers
通讯作者：
S. Myers