Big is better: the importance of size for reproductive success in male Pomatoschistus minutus (Pallas) (Pisces, Gobiidae)
Big is better: the importance of size for reproductive success in male Pomatoschistus minutus (Pallas) (Pisces, Gobiidae)
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大越好：体型对于雄性 Pomatoschistus minutus (Pallas)（双鱼座，Gobiidae）繁殖成功的重要性
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
L. Kvarnemo
中科院分区：
文献类型：
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作者：
C. Magnhagen;L. Kvarnemo
沙虾虎鱼，Pomatoschistus minutus，被用于水族馆实验，以研究身体大小的重要性，男性的能力，以获得进入巢址和配偶。当几只雄性和雌性微小拟步行虫被允许一起繁殖时，平均有一半的雄性筑巢，一半的雄性在巢中产卵。有巢的雄性比没有巢的雄性明显更大，有蛋的巢属于雄性比空巢的雄性更大。在另一个实验中，当两个雄性竞争一个巢穴时，当两条鱼同时被放入水族馆时，最大的雄性占据了巢穴。然而，当较小的男性已被允许建立一个巢之前，较大的男性被引入，小男性通常可以保留巢。体长< 50 mm的雄性在繁殖季节的早期根本不筑巢。在雌性选择实验中，没有发现对体型较大的雄性的偏好，因此，雄虫对巢址的竞争和不同体型雄虫之间的行为差异可能是影响雄性微小拟步行虫非随机交配成功的主要因素。
The sand goby, Pomatoschistus minutus, was used in aquarium experiments to study the importance of body size for the ability of males to gain access to nest sites and mates. When several male and female P. minutus were allowed to reproduce together, on average, half of the males built nests, and half of those males obtained eggs in their nests. Males with nests were significantly larger than males without nests, and nests with eggs belonged to males larger than the males with empty nests. In another experiment, when two males were competing for one nest, the largest male occupied the nest when both fish were put into the aquarium simultaneously. However, when the smaller male had been allowed to establish a nest before the larger male was introduced, the small male could usually retain the nest. Males with a body length < 50 mm did not build nests at all in the early part of the breeding season. In female choice experiments, no preference for larger males was found. Thus, male-male competition for nest sites and behavioural differences between different sized males seem to be the main factors influencing the non-random mating success in male P. minutus.