期刊
AMERICAN NATURALIST
卷 194, 期 2, 页码 260-267出版社
UNIV CHICAGO PRESS
DOI: 10.1086/704169
关键词
resource pulses; dietary flexibility; specialization; coexistence; adaptive radiation
资金
- Rosemary Grant Award from the Society for the Study of Evolution
- Aven Nelson Grant from the University of Wyoming Department of Botany
- National Science Foundation [DEB-1556963]
Trophic specialization is a key feature of the diversity of cichlid fish adaptive radiations. However, K. F. Liem observed that even species with highly specialized trophic morphologies have dietary flexibility, enabling them to exploit episodic food resources opportunistically. Evidence for dietary flexibility comes largely from laboratory studies, and it is unclear whether cichlid fishes undergo diet shifts in the wild. We report observations of diet switching by multiple cichlid species in Lake Tanganyika as a consequence of unusual concentrations of schooling juvenile clupeid fishes. Fish species with varying degrees of trophic specialization converged on a single prey: juvenile sardines that are also endemic to Lake Tanganyika (Stolothrissa tanganicae and Limnothrissa miodon). We provide evidence for cichlid species acting as jacks-of-all-trades and discuss this evidence in the framework of Liem's classic paradox: that trophic specialization does not preclude dietary flexibility.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据