Foraging innovation is inversely related to competitive ability in male but not in female guppies
Foraging innovation is inversely related to competitive ability in male but not in female guppies
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DOI：
10.1093/beheco/10.3.270
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发表时间：
1999-05-01
影响因子：
2.4
通讯作者：
Reader, SM
中科院分区：
文献类型：
--
作者：
Laland, KN;Reader, SM
觅食成功可能会影响动物的饥饿水平和寻找和开发新食物来源的动机。我们探索了孔雀鱼（Poecilia reticulata）争夺有限食物和觅食创新之间的关系，预测当面临新的觅食任务时，较差的竞争对手更有可能创新。在男性中，我们发现完成新觅食任务的潜伏期与体重增加和消耗的食物数量相关，这表明较差的竞争对手更有可能创新。然而，在女性中，创新倾向与体重增加或觅食成功之间没有关系。我们认为这种性别差异可能反映了雄性和雌性亲代投资的不对称，我们预测其他物种也存在类似的性别差异。
Foraging success is likely to affect hunger level and motivation to locate and exploit novel food sources in animals. We explored the relationship between scramble competition for limited food and foraging innovation in the guppy (Poecilia reticulata), predicting that poor competitors would be more likely to innovate when presented with novel foraging tasks. Among males, we found that latency to complete novel foraging tasks was correlated both with weight gain and number of food items consumed, suggesting that poor competitors are more likely to innovate. However, among females there was no relationship between innovative tendency and either weight gain or foraging success. We suggest that this sex difference may reflect parental investment asymmetries in males and females, and we predict similar sex differences in other species.