Differential predation on the two colour morphs of Nicaraguan Crater lake Midas cichlid fish: implications for the maintenance of its gold-dark polymorphism
Differential predation on the two colour morphs of Nicaraguan Crater lake Midas cichlid fish: implications for the maintenance of its gold-dark polymorphism
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对尼加拉瓜火山口湖米达斯丽鱼的两种颜色形态的差异捕食:对其金暗多态性维持的影响
DOI:
10.1111/bij.12271
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发表时间:
2014
影响因子:
1.9
通讯作者:
A. Meyer
中科院分区:
文献类型:
--
作者:
Torres-Dowdall;Machado-Schiaffino;Kusche;A. Meyer
Predation can play an important role in the evolution and maintenance of prey colour polymorphisms. Several factors are known to affect predator choice, including the prey's relative abundance and conspicuousness. In polymorphic prey species, predators often target the most common or most visible morphs. To test if predator choice can explain why in Midas cichlid fish the more visible (gold) morph is also more rare than the inconspicuous dark morph, we conducted predation experiments using two differently coloured wax models in Nicaraguan crater lakes. Contrary to expectations, we observed an overall higher attack rate on the much more abundant, yet less conspicuous dark models, and propose frequency-dependent predation as a potential explanation for this result. Interestingly, the attack rate differed between different types of predators. While avian predators were biased towards the abundant and less colourful dark morphs, fish predators did not show a strong bias. However, the relative attack rate of fish predators seemed to vary with the clarity of the water, as attack rates on gold models went up as water clarity decreased. The relative differential predation rates on different morphs might impact the relative abundance of both colour morphs and thus explain the maintenance of the colour polymorphism. © 2014 The Linnean Society of London,Biological Journal of the Linnean Society, 2014,112, 123–131.
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影响因子:
56.9
作者:
G. Barlow
通讯作者:
G. Barlow
影响因子:
3.3
作者:
Elmer, Kathryn R.;Lehtonen, Topi K.;Meyer, Axel
通讯作者:
Meyer, Axel
影响因子:
2.6
作者:
M. Dittmann;Marius Roesti;A. Indermaur;M. Colombo;M. Gschwind;I. Keller;Robin Kovac;M. Barluenga;Moritz Muschick;W. Salzburger
通讯作者:
W. Salzburger
DOI:
--
发表时间:
1977
期刊:
影响因子:
--
作者:
T. B. Thorson
通讯作者:
T. B. Thorson
影响因子:
3.3
作者:
M. Turelli;N. H. Barton
通讯作者:
M. Turelli;N. H. Barton