Reproductive Behavior of Moray Eels at Miyake-jima, Japan
Reproductive Behavior of Moray Eels at Miyake-jima, Japan
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日本三宅岛海鳗的繁殖行为
DOI：
10.11369/jji1950.28.466
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发表时间：
1982
期刊：
影响因子：
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通讯作者：
Martha J. Zaiser
中科院分区：
文献类型：
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作者：
J. T. Moyer;Martha J. Zaiser
结果在1980年8月15日16时30分，我们在12米深的海底观察到了裸胸鳗。我们在穿过一块巨石前往研究地点的途中，看到两条长4米、直径20厘米的大鳗鱼躺在鹅卵石基板上，紧挨着一条破裂的管道。两条鳗鱼似乎全长约90厘米。它们被横向挤压在一起，身体的后1/3松散地缠绕在一起。突然，它们把腹部压在一起，离管道最近的那条鳗鱼迅速转向左边，进入了管道上的一个洞。与此同时，两条鳗鱼似乎全长约90厘米，身体的后1/3松散地缠绕在一起。突然，它们把腹部压在一起，离管道最近的那条鳗鱼迅速转向左侧，进入管道上的一个洞另一条鳗鱼突然转向右侧，在距离管子60-80厘米的地方猛冲。当它们的身体分开时，一大团配子出现了。没有向上冲撞。卵是球形的，漂浮的，透明的，大的(直径估计为2毫米)。它们没有被收集。没有人试图保护产卵，尽管其中一只在我们检查鸡蛋时密切注视着我们。抛售恰好发生在日落前121分钟(18点31分)和新月之后四天(1980年8月11日)。尽管在温和的近海洋流区域，产卵时没有明显的水流，但水温为26摄氏度，没有观察到性别二态，我们无法区分雄性和雌性。
Results Gymnothorax kidako.Spawning was observed at 16:30h,15 Aug 1980,at a depth of 12 m.Using SCUBA,we had just crossed over a boulder en route to a study site,when we saw two large G.kidako lying together on the cobble substrate immediately adjacent to a piece of broken pipe,four meters in length and 20cm in diameter.Both eels appeared to be about 90cm in total length.They were pressed laterally together with the posterior 1/3 of their bodies loosely entwined.Suddenly,they pressed their abdomens together and the eel closest to the pipe turned rapidly to the left,entering a hole in the pipe.Simultaneously,the other eel turned sharply to the right and dashed 60 ti 80cm away from the pipe.As their bodies separated,a large cloud of gametes appeared. There was no upward dash.The eggs were spherical,buoyant,transparent,and large(an estimated 2mm in diameter).They were not collected.Neither moray made any attempt to defend the spawn,although one of them watched us closely as we examined the eggs.Spawning occurred exactly 121 minutes before sunset (18:31h)and four days after the new moon (11 Aug 1980).Although in an area of moderate offshore currents,there was no noticeable current at the time of spawning.The water temperature was 26°C.No sexual dimorphism was observed,and we were unable to distinguish male from female.