Spawning season and migration of the myctophid fish Diaphus theta in the western North Pacific
Spawning season and migration of the myctophid fish Diaphus theta in the western North Pacific
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DOI：
10.1007/s102280300007
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发表时间：
2003-02
影响因子：
1.2
通讯作者：
M. Moku;A. Tsuda;K. Kawaguchi
中科院分区：
文献类型：
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作者：
M. Moku;A. Tsuda;K. Kawaguchi
通过季节性取样和孵化期测定，研究了西北太平洋海域黑眶鱼Diaphus theta的产卵季节、产卵场和洄游情况。在7月，在黑潮锋和御潮锋之间的过渡沃茨观察到了幼虫的高峰。产卵期为3月下旬至9月上旬，5月至7月为产卵高峰期。标准长度<40 mm的幼体和幼鱼分布在过渡沃茨，而较大的个体则收集在Oyashio和西亚北极沃茨。这些结果表明，该物种经历了一个水平产卵迁移从Oyashio和西亚北极沃茨到过渡沃茨跨越Oyashio前线。
The spawning season, spawning grounds, and migration of the myctophid fishDiaphus thetawere studied in the western North Pacific, based on seasonal sampling and estimation of hatching dates. The peak abundance of larvae was observed in July in the transition waters between the Oyashio and Kuroshio fronts. The spawning season ranged from late March to early September, with a peak from May to July. Larvae and juveniles <40 mm in standard length were distributed in the transition waters, whereas larger individuals were collected in the Oyashio and the Western Subarctic waters. These results indicate that this species undergoes a horizontal spawning migration from the Oyashio and Western Subarctic waters into the transition waters crossing the Oyashio front.