Spawning behavior of garden eels, Gorgasia preclara and Heteroconger hassi (Heterocongrinae), observed in captivity
Spawning behavior of garden eels, Gorgasia preclara and Heteroconger hassi (Heterocongrinae), observed in captivity
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DOI：
10.1080/10236244.2015.1064213
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发表时间：
2015-01-01
影响因子：
1
通讯作者：
Tsukamoto, Katsumi
中科院分区：
文献类型：
--
作者：
Kakizaki, Tomohiro;Kobayashi, Keisuke;Tsukamoto, Katsumi
典型的夜行性海洋鳗鱼的行为和生殖生态学知之甚少，但花园鳗鱼（Congridae，Heterocongrinae）是常见的热带海洋鳗鱼。它们成群生活，白天从洞穴中伸出身体以浮游动物为食。在殖民地内观察到明显的日间求偶/产卵样行为，但实际的产卵和受精卵生产尚未得到证实。本研究描述了观察灿烂的花园鳗鱼（Gorgasia preclara）和斑点花园鳗鱼（Heteroconger hassi）产卵在夜间低光和生产受精卵在一个大型的多物种的公共展示池在墨田水族馆。对17次产卵或卵、精释放事件中的5次进行了录像，记录了该鱼的产卵行为。收集了两个物种的前幼虫和正浮力受精卵。它们的产卵行为，而突出的广泛间隔的洞穴证实，花园鳗鱼可能产卵在其殖民地与他们的远洋卵漂流与电流。
The behavior and reproductive ecology of typically nocturnal marine eels is poorly known but garden eels (Congridae, Heterocongrinae) are familiar tropical marine eels. They live in colonies and protrude their bodies from burrows during the daytime to feed on zooplankton. Apparent daytime courtship/ spawning-like behavior has been observed within the colonies but actual spawning and fertilized egg production has not been confirmed. This study describes observations of splendid garden eels (Gorgasia preclara) and spotted garden eels (Heteroconger hassi) spawning in low light at night and producing fertilized eggs in a large multispecies public-display tank in the Sumida Aquarium. Video recordings of 5 of 17 detected spawning or egg or sperm release events documented the spawning behavior of G. preclara, and positively buoyant fertilized eggs of both species were collected. Their spawning behavior while protruding from widely spaced burrows confirms that garden eels likely spawn within their colonies with their pelagic eggs drifting away with currents.