Intragroup competition predicts individual foraging specialisation in a group-living mammal.
Intragroup competition predicts individual foraging specialisation in a group-living mammal.
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DOI：
10.1111/ele.12933
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发表时间：
2018-05
期刊：
影响因子：
8.8
通讯作者：
Marshall HH
中科院分区：
文献类型：
--
作者：
Sheppard CE;Inger R;McDonald RA;Barker S;Jackson AL;Thompson FJ;Vitikainen EIK;Cant MA;Marshall HH
个体觅食专门化具有重要的生态意义，但其在群体生活物种中的原因尚不清楚。群体生活的主要后果之一是群体内对资源的竞争加剧。觅食理论预测，随着竞争的加剧，个体应该在饮食中添加新的猎物，扩大其觅食生态位（“最佳觅食假说”）。然而，经典的竞争理论表明相反：增加竞争导致生态位分割和更大的个人觅食专业化（“生态位分割假说”）。我们测试了这些相反的预测，在野生的，群体生活的带状猫鼬（Mungos mungo），使用带状猫鼬胡须的稳定同位素分析来量化个体和群体的觅食生态位。个体觅食生态位的大小随着群体规模的增加而下降，尽管所有群体的整体生态位大小相似。我们的研究结果支持的预测，竞争促进生态位划分的社会群体，并建议个人觅食专业化可能发挥重要作用，在形成稳定的社会群体。
Individual foraging specialisation has important ecological implications, but its causes in group‐living species are unclear. One of the major consequences of group living is increased intragroup competition for resources. Foraging theory predicts that with increased competition, individuals should add new prey items to their diet, widening their foraging niche (‘optimal foraging hypothesis’). However, classic competition theory suggests the opposite: that increased competition leads to niche partitioning and greater individual foraging specialisation (‘niche partitioning hypothesis’). We tested these opposing predictions in wild, group‐living banded mongooses (Mungos mungo), using stable isotope analysis of banded mongoose whiskers to quantify individual and group foraging niche. Individual foraging niche size declined with increasing group size, despite all groups having a similar overall niche size. Our findings support the prediction that competition promotes niche partitioning within social groups and suggest that individual foraging specialisation may play an important role in the formation of stable social groupings.
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DOI：
10.1016/j.cub.2015.06.071
发表时间：
2015-08-17
期刊：
Current biology : CB
影响因子：
--
作者：
Farine DR;Spencer KA;Boogert NJ
通讯作者：
Boogert NJ
影响因子：
2.7
作者：
Araujo, Marcio S.;Bolnick, Daniel I.;dos Reis, Sergio F.
通讯作者：
dos Reis, Sergio F.
影响因子：
5.2
作者：
Bearhop, S;Furness, RW;Waldron, S
通讯作者：
Waldron, S
影响因子：
2.5
作者：
Bearhop, Stuart;Phillips, Richard A.;Croxall, John P.
通讯作者：
Croxall, John P.
影响因子：
4.8
作者：
Araujo, Marcio S.;Guimaraes, Paulo R., Jr.;Bolnick, Daniel I.
通讯作者：
Bolnick, Daniel I.