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首页> 外文期刊>Journal of Fish Biology >Tactic changes in dusky frillgoby Bathygobius fuscus sneaker males: effects of body size and nest availability
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Tactic changes in dusky frillgoby Bathygobius fuscus sneaker males: effects of body size and nest availability

机译：昏暗的Frillgoby Bathygobius fuscus运动鞋男的战术变化：身体尺寸和产蛋箱可用性的影响

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摘要

Field and laboratory studies were conducted to examine the effects of nest availability and body size on changes in male mating tactics from sneaking to nest-holding in the dusky frillgoby Bathygobius fuscus. In the field, the body size of nest-holding males decreased from early to mid-breeding season, suggesting the possibility of a change in the tactics of sneaker males to nest-holding. Many sneaker males did not use vacant spawning nests even when size-matched nests were available, but they continued to reproduce as sneakers. Similarly, in aquarium experiments with available vacant nests, some sneaker males became nest-holders irrespective of their body size, but some did not. These results showed that nest availability is not a limiting factor for changes in tactics by sneaker males in this species. Because tactic-unchanged sneaker males were co-housed with larger nest-holding males in the tanks, the body size of nearby nest-holding males may have affected the decision to change tactics for sneaker males. Moreover, smaller individuals among tactic-changed males tended to spend more time until spawning, probably because they had relatively larger costs and smaller benefits of reproduction as nest-holding males compared to larger males.
机译：进行了野外和实验室研究，以考察巢中可利用性和体型对雄性交配策略变化的影响，该策略从偷偷摸摸的比目鱼（Babygobius fuscus）偷偷摸摸到筑巢。在田间，巢窝雄性的体形从繁殖的早期到中期就减小了，这表明有可能将运动鞋雄性的策略改为巢状。即使有大小匹配的巢，许多运动鞋雄性也没有使用空的产卵巢，但它们继续作为运动鞋繁殖。同样，在具有可用空巢的水族箱实验中，一些运动鞋雄性无论其体型如何都成为了巢穴持有者，但有些却没有。这些结果表明，巢穴可用性不是该物种运动鞋雄性策略改变的限制因素。由于战术上不变的运动鞋雄性与较大的筑巢雄性共同生活在水箱中，因此附近筑巢雄性的体型可能会影响决定改变运动鞋雄性战术的决定。此外，战术改变后的雄性中较小的个体倾向于花更多的时间直到产卵，这可能是因为与雄性较大的雄性相比，它们作为巢穴雄性具有相对较大的成本和较小的繁殖效益。

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