DISTRIBUTION OF TUNA LARVAE (PISCES, SCOMBRIDAE) IN THE NORTHWESTERN GULF OF GUINEA AND OFF SIERRA LEONE 1
DISTRIBUTION OF TUNA LARVAE (PISCES, SCOMBRIDAE) IN THE NORTHWESTERN GULF OF GUINEA AND OFF SIERRA LEONE 1
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几内亚湾西北部和塞拉利昂近海金枪鱼幼虫（双鱼座、鲭科）的分布1
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发表时间：
1971
期刊：
影响因子：
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通讯作者：
D. J. Simmons
中科院分区：
文献类型：
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作者：
W. J. Richards;D. J. Simmons
在1964年2月至4月、1964年8月至10月和1965年2月至4月期间，对几内亚湾西北部和塞拉利昂外海的金枪鱼幼虫分布进行了调查。对黄鳍金枪鱼、大眼金枪鱼、鲣鱼、小金枪鱼和鲭鱼的仔鱼进行了采集和研究。对数据的分析表明，黄鳍金枪鱼和大眼金枪鱼的幼虫在白天迁移到水面，鲣鱼在夜间迁移到水面，而鲭鱼似乎在任何时候都不迁移。我们对小金枪鱼的数据并不确定。所有物种都广泛分布在该地区，但具有重要商业价值的金枪鱼（黄鳍金枪鱼、大眼金枪鱼和鲣鱼）的幼虫仅限于表面温度高于24° C的沃茨。金枪鱼在东大西洋的分布随季节变化（理查兹，1969年）。1964年和1965年，商业渔业局的研究船Geronimo（第3、4和5次巡航）在几内亚湾西北部和塞拉利昂近海采集了金枪鱼幼虫。这些收集是广泛调查的一部分，旨在将空间和时间差异联系起来，
Investigations of tuna larvae distributions in the northwestern Gulf of Guinea and off Sierra Leone were made during February-April 1964, August-October 1964, and February-April 1965. Larvae of the yellowfin tuna, bigeye tuna, skipjack tuna, little tunny, and frigate mackerels were collected and studied. Analyses of the data indicated that larvae of yellowfin tuna and bigeye tuna migrate to the surface during the day, skipjack tuna migrate to the surface during the night, aiJd frigate mackerels do not seem to migrate at any time. Our data for little tunny were inconclusive. All species were widely distributed over the area but larvae of the commercially important tunas-yellowfin, bigeye, and skipjack-were restricted to waters where surface temperatures were higher than 24° C. The distribution of tunas varies seasonally in the eastern Atlantic Ocean (Richards, 1969). In 1964 and 1965, the Bureau of Commercial Fisheries research vessel Geronimo (cruises 3, 4, and 5) collected tuna larvae in the northwest ern Gulf of Guinea and off Sierra Leone. These collections were part of extensive investigations intended to relate the spatial and temporal dis