Optimal Release Locations of Juvenile Ocellate Puffer Takifugu rubripes Identified by Tag and Release Experiments
Optimal Release Locations of Juvenile Ocellate Puffer Takifugu rubripes Identified by Tag and Release Experiments
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标记和释放实验确定红鳍东方鲀幼鱼的最佳释放位置
DOI：
10.1080/10641260701684106
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发表时间：
2008
影响因子：
--
通讯作者：
M. Machida
中科院分区：
文献类型：
--
作者：
H. Nakajima;M. Kai;Koji Koizumi;Toshiomi Tanaka;M. Machida
通过标签和放生实验，确定了红鳍鲀孵化场产卵幼鱼放生的最佳放生地点。这些鱼从2001年到2005年在日本本州岛中部海岸的骏河湾、恩须那田、伊势湾和熊野那田四个地区被放生。大约1万至4万条养殖河豚分成23组在这些地区放生。伊势湾主要以小型拖网捕捞0岁以上带标签鱼，鹤河湾、恩须那田和熊野那田主要以延绳钓捕捞1岁以上带标签鱼。伊势湾放养组的总体平均捕获率为13.0%，而骏河湾放养组、恩须那达放养组和熊野那达放养组的平均捕获率分别为2.0%、2.9%和0.7%。即使在伊势湾地区，在三个放生地点之间也观察到重捕率的显著差异。由于在日本鲈鱼（Lateolabrax japonicus）的肠道中发现了带有标记的鱼，因此较低的再捕获率可能是由捕食引起的。建议即使在伊势湾放生，也应仔细评估和选择放生地点，以降低初始死亡率。其中一个最佳的释放地点是在浅水地区，如Tokoname附近，那里居住着野生的小细胞河豚。
We identified the optimal location for releasing hatchery-produced juveniles of ocellate puffer (Takifugu rubripes) for stock enhancement by tag and release experiments. The fish were released at four areas, Suruga Bay, Enshu Nada, Ise Bay, and Kumano Nada, along the central coast of Honshu Island in Japan from 2001 to 2005. Approximately 10,000–40,000 cultured puffer fish were released in these areas in 23 groups. Tagged fish were mainly recaptured at age 0 by small-scale trawl net fishing in Ise Bay, and by longline fishing at age one or older in Suruga Bay, Enshu Nada, and Kumano Nada. Overall average recapture rate yielded 13.0% for the Ise Bay release group compared with 2.0%, 2.9%, and 0.7% for the Suruga Bay, Enshu Nada, and Kumano Nada release groups, respectively. Even in the Ise Bay area, significant differences in recapture rates were observed among three release locations. Lower recapture rates were presumably caused by predation, because tagged fish were found in the intestines of Japanese sea bass (Lateolabrax japonicus). It is suggested that release locations should be carefully evaluated and chosen to reduce initial mortality even if cultured ocellate puffer are released in Ise Bay. One of the optimal release locations is specified in shallow areas, such as off Tokoname, which are inhabited by wild juvenile ocellate puffer.