Geographical and seasonal changes of the prey species of minke whale in the Northwestern Pacific
Geographical and seasonal changes of the prey species of minke whale in the Northwestern Pacific
复制标题
西北太平洋小须鲸猎物种类的地理和季节变化
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
Y. Fujise
中科院分区：
文献类型：
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作者：
T. Tamura;Y. Fujise
分析了1994-1999年5 - 9月在西北太平洋采集的498头尖吻长须鲸的前胃内容物。16个猎物物种组成的1桡足类，4磷虾类，鱿鱼1，和10种鱼类被确定。西北太平洋的小须鲸是一种吞咽，进食型物种。它以成群的浮游动物和成群的鱼类为食，这表明小须鲸追求单一的猎物物种聚集。结果表明，猎物种类的地理和季节变化。在日本的太平洋一侧，日本鲤鱼是5月和6月最重要的猎物物种，而太平洋秋刀鱼是7月和8月最重要的。狭鳕也是一个重要的猎物物种在6月和9月在沿海沃茨，在大陆架。在鄂霍次克海南部磷虾是最重要的猎物物种在7月和8月。这些变化可能反映了在这些地区的猎物物种的可用性的变化。看来小须鲸和太平洋秋刀鱼渔业之间可能存在直接竞争。版权所有2002年国际海洋勘探理事会。由爱思唯尔科技有限公司出版。保留所有权利。
The forestomach contents of 498 minke whales Balaenoptera acutorostrata sampled in the Northwestern Pacific from May to September through the 1994-1999 JARPN surveys, were analysed. Sixteen prey species consisting of 1 copepod, 4 euphausiids, 1 squid, and 10 fishes were identified. The minke whale in the Northwestern Pacific is a swallowing, feeding-type species. It feeds on swarming zooplankton and schooling fishes, suggesting that minke whales pursue single prey-species aggregations. The results showed geographical and seasonal changes of prey species. On the Pacific side of Japan, Japanese anchovy was the most important prey species in May and June, while Pacific saury was most important in July and August. Walleye pollock was also an important prey species during June and September in coastal waters, over the continental shelf. In the southern Okhotsk Sea krill was the most important prey species in July and August. These changes probably reflect changes in the availability of the prey species in these areas. It would seem that there might be direct competition between minke whales and the fishery for Pacific saury. Copyright 2002 International Council for the Exploration of the Sea. Published by Elsevier Science Ltd. All rights reserved.