Female defense polygyny in the territorial triggerfish Sufflamen chrysopterum
Female defense polygyny in the territorial triggerfish Sufflamen chrysopterum
复制标题
领地引金鱼 Sufflamen chrysopterum 中的雌性防御一夫多妻制
DOI：
10.1007/s10164-008-0108-x
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发表时间：
2009
影响因子：
0.9
通讯作者：
T. Kuwamura
中科院分区：
文献类型：
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作者：
S. Seki;M. Kohda;Gousuke Takamoto;K. Karino;Y. Nakashima;T. Kuwamura
一夫多妻制的发生需要特定的环境条件，如女性聚集或斑块资源分布。然而，很难确定在两性领土重叠的物种中导致一夫多妻制的因素。为了克服这一点，我们进行了女性去除实验中的一夫多妻制的鱼Sufflamen chrysopterum（Balistidae）在冲绳珊瑚礁。两种性别的人都只会保卫自己的领地，对抗同一物种的同性恋者，而女性群体则不存在。每个男性领土包括1-3个女性领土，和nonterritorial男性显着小于领域男性。此外，领土男性的身体大小与最大的女性在他们的领土，和较大的男性往往与更多的女性交配。女性去除实验（n= 10女性）的结果表明，女性竞争更好的领土，而不是更大的队友。相反，一旦女性移民，男性就会放弃领地。这些结果强烈表明，男性捍卫女性，而不是网站和竞争更大，更多的女性。因此，在S. chrysopterum，雌性防御一夫多妻制发生在没有雌性聚集。
The occurrence of polygyny requires specific environmental conditions such as female aggregation or patchy resource distribution. However, it is difficult to determine the factors responsible for polygyny in species in which the territories of both sexes overlap. To overcome this, we performed female removal experiments in the polygynous triggerfishSufflamen chrysopterum(Balistidae) in the Okinawa coral reef. Both sexes defended their territories exclusively against consexuals of the same species, and female aggregation was absent. Each male territory included 1–3 female territories, and nonterritorial males were significantly smaller than territorial males. Further, the body size of territorial males was positively correlated with that of the largest female in their territories, and larger males tended to mate with more females. The results of the female removal experiments (n= 10 females) indicated that females competed for better territories rather than larger mates. In contrast, males abandoned the territories once the females emigrated. These results strongly suggest that males defend females rather than sites and compete for larger and a greater numbers of females. Thus, inS. chrysopterum, female defense polygyny occurs in the absence of female aggregation.