Size-mediated dominance and aggressive behaviour of male Japanese fluvial sculpin Cottus pollux (Pisces : Cottidae) reduce nest-site abun-dance and mating success of conspecific rivals
Size-mediated dominance and aggressive behaviour of male Japanese fluvial sculpin Cottus pollux (Pisces : Cottidae) reduce nest-site abun-dance and mating success of conspecific rivals
复制标题
雄性日本河流杜父鱼 Cottus pollux（双鱼座：Cottidae）的体型介导的优势和攻击行为降低了巢穴丰富度和同种竞争对手的交配成功率
DOI：
10.1007/s10164-011-0316-7
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发表时间：
2012
影响因子：
0.9
通讯作者：
Masahide Yuma
中科院分区：
文献类型：
--
作者：
Takaharu Natsumeda;Seiichi Mori;Masahide Yuma
尽管越来越多的证据表明，可塑性的巢举行的动物的交配模式在巢丰富的变化，侵略性的相互作用，占主导地位的男性对巢可用性的同种竞争对手的影响仍然不清楚。为了量化雄性竞争对雄性日本河杜父鱼（Cottus pollux）巢址选择和交配成功率的影响，我们在充足和短缺巢丰条件下对来自不同大小等级的5只雄性进行了实验。巢选择试验表明，雄鸟的大小等级和巢多度对雄鸟的筑巢率有显著影响。在巢选择实验之后，将10只妊娠雌性添加到实验池中。交配实验表明，男性的大小，筑巢率之前，除了女性，和求偶尝试女性的数量是男性交配成功的有效变量，无论巢丰度条件。在实现最初的交配成功后，最大的筑巢男性表现出更频繁的侵略性与其他同种男性比他之前，在他的巢中获得鸡蛋的互动。我们的研究结果表明，大小介导的优势和侵略行为的男性可能会破坏其他同种男性的巢收购，并可能因此导致极端的变化，即使在足够的巢丰富的条件下，男性之间的交配成功。
Despite growing evidence for plasticity in the mating patterns of nest-holding animals in relation to the changes in nest abundance, the effects of aggressive interaction by dominant males on nest availability for conspecific rivals remains unclear. To quantify the effects of male–male competition on nest-site choice and mating success of the male Japanese fluvial sculpinCottus pollux, we conducted experiments on 5 males from different 5 size classes under both sufficient and shortage nest-abundance conditions. Nest-choice experiments showed that both male size class and nest-abundance condition had significant effects on the nesting rates of males. Following the nest-choice experiments, 10 gravid females were added in the experimental tanks. Mating experiments revealed that male size, nesting rate before addition of females, and the number of courtship attempts on females were valid variables of male mating success, regardless of nest-abundance conditions. After achieving initial mating success, the largest nesting male exhibited more frequent aggressive interaction with other conspecific males than he did before obtaining eggs in his nest. Our results suggest that size-mediated dominance and aggressive behavior of males may disrupt nest acquisition of other conspecific males, and may consequently result in extreme variation in mating success among males even under sufficient nest-abundance conditions.