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首页> 外文期刊>Zoological Science >Two Patterns of Parasitic Male Mating Behaviors and Their Reproductive Success in Japanese Medaka, Oryzias latipes
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Two Patterns of Parasitic Male Mating Behaviors and Their Reproductive Success in Japanese Medaka, Oryzias latipes

机译：日本Medaka，Oryzias latipes的两种寄生性交配行为模式及其繁殖成功

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摘要

We found two patterns of parasitic mating behaviors by male in Japanese medaka, Oryzias latipes, in the spawning by one female and two males in the aquarium condition. In the first type of parasitic mating behavior, the unpaired male would rush toward the closely adhering female and paired male, and simultaneously perform emission behavior with close adhesion to the female (simultaneous emission). The second type of parasitic mating behavior was that the unpaired male would rush toward the female with spawned eggs hanging down from the genital pore several seconds after pair-spawning, perform emission behavior with close adhesion to the female without any pre-spawning behavior (post-spawn emission). The frequencies of "simultaneous emission" and "post-spawn emission" were 20 (19.6%) and 18 cases (17.7%), respectively, in 102 trials, and the average reproductive successes about 41% and 20%, respectively. The reproductive success of simultaneous emission was not correlated with the timing and duration of spawning behaviors of the paired/unpaired male, while the reproductive success of post-spawn emission significantly decreased as the length of time during which the paired male adhered to female increased. Observations of two consecutive spawning behaviors using same combination of two males revealed that paired males always tend to become paired males. However, the role of both males was occasionally reversed, indicating flexibility in mating tactics.
机译：我们在水族箱条件下，在一只雌性和两只雄性产卵的日本中发现了两种雄性寄生交配行为。在第一种类型的寄生交配行为中，未成对的雄性会冲向紧密附着的雌性和成对的雄性，并同时执行与雌性紧密附着的发射行为（同时发射）。第二类寄生交配行为是成对产卵后几秒钟，未成对的雄性会在卵产卵从生殖器孔中垂下的情况下冲向雌性，进行与雌性紧密粘附的发射行为而无任何产卵前行为（后-生成辐射）。在102项试验中，“同时排放”和“产后排放”的发生频率分别为20例（19.6％）和18例（17.7％），平均生殖成功率分别约为41％和20％。配对/未配对雄性同时繁殖的生殖成功与产卵行为的时间和持续时间无关，而随着配对雄性与雌性附着的时间增加，产卵后的繁殖成功显着下降。使用两个雄性的相同组合进行的两次连续产卵行为的观察表明，成对的雄性总是趋向于成对的雄性。但是，这两只雄性的角色有时会互换，表明在交配战术上具有灵活性。

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