One cost of being gold: selective predation and implications for the maintenance of the Midas cichlid colour polymorphism (Perciformes: Cichlidae)
One cost of being gold: selective predation and implications for the maintenance of the Midas cichlid colour polymorphism (Perciformes: Cichlidae)
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成为黄金的代价之一:选择性捕食及其对维持迈达斯慈鲷颜色多态性的影响(鲈形目:丽鱼科)
DOI:
10.1111/bij.12205
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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:
Kusche;A. Meyer
In the colour-polymorphic Midas cichlid fish species complex (Amphilophus citrinellusspp.), gold morphs occur at much lower frequencies (< 10%) than dark individuals. This might be surprising because gold coloration is dominant and coded for by a single Mendelian locus. Furthermore, gold individuals are considered to be competitively advantaged over dark ones because they grow faster and win aggressive encounters more often compared to dark individuals of equal size. However, one might expect a cost of being gold in terms of natural selection as a result of predation. We tested whether the Jaguar cichlid (Parachromis managuensis), a major fish predator of Midas cichlids, preys differentially on colour variants of goldfish (Carassius auratus auratus), which were used as a proxy for Midas cichlids because of their similarity in colour. Size-matched pairs of prey fish (gold and dark) were offered to the predator and the time until the fish were attacked was recorded. The gold morph was attacked first more often (approximately 70%) but not faster than the dark morph. This suggests that the predator perceives the gold individual first, and/or that the predator exhibits a preference or higher motivation to attack the gold prey fish. The increased risk of predation of gold prey fish suggests for the Midas cichlid system that being gold may carry significant costs in terms of natural selection as a result of its major piscivorous predator.
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影响因子:
56.9
作者:
G. Barlow
通讯作者:
G. Barlow
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:
16.8
作者:
A. Burt
通讯作者:
A. Burt
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
K. Fowler‐Finn;E. Hebets
通讯作者:
E. Hebets
DOI:
--
发表时间:
1973
期刊:
影响因子:
--
作者:
B. Kettlewell
通讯作者:
B. Kettlewell