The diet of mesopelagic fish from the Pacific coast of Hokkaido, Japan
The diet of mesopelagic fish from the Pacific coast of Hokkaido, Japan
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日本北海道太平洋沿岸中层鱼类的饮食
DOI：
10.1007/bf02109178
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
T. Nemoto
中科院分区：
文献类型：
--
作者：
J. Gordon;S. Nishida;T. Nemoto
对来自北海道太平洋沿岸的至少28种中层鱼类的食物进行了研究。优势科为角口科（42%），有5种。最丰富的物种是黑圆腹蛛，它与该属的其他物种一起主要捕食桡足类。浮游动物以磷虾类和桡足类为主。其次是Myctophidae（32%），有7个物种。优势种为狭臂藻，主要捕食桡足类。桡足类也是除乔氏灯鱼主要以磷虾类为食外的其它种类的优势食物。另一个重要的科是尖吻叶兔科（21%），其优势种为施密德白舌叶兔（Leuroglossus schmidti），其食物种类较为多样，介形类、桡足类、软体动物和幼虫类是其最重要的食物种类，而奥科尖吻叶兔的食物种类与之相似。桡足类是最重要的食物项目，但少数几个物种，它们在鱼胃中的发生有关的已知的垂直分布的捕食者和猎物。介形类和磷虾类也是重要的猎物项目，后者特别是在大型鱼类。软体动物和幼虫仅限于螺科的两个物种。
The diet of at least 28 species of mesopelagic fish from the Pacific coast of Hokkaido was examined. The dominant family was the Gonostomatidae (42%) which was represented by five species. The most abundant species wasCyclothone atraria which together with the other species of this genus preyed predominantly on copepods. Euphausiids and copepods were dominant in the diet ofGonostoma gracile. The next most abundant family was the Myctophidae (32%) which was represented by seven species. The dominant species,Stenobrachius nannochir, preyed mainly on copepods. Copepods were also the dominant food item of the other myctophids except forLampanyctus jordani which fed mainly on euphausiids. The other important family was the Bathylagidae (21%).Leuroglossus schmidti was the dominant species and its diet was more diverse with ostracods, copepods, molluscs and larvaceans being the most important food items.Bathylagus ochotensis had a similar diet. Copepods were the most important food items for all but a few species and their occurrence in the fish stomachs was related to the known vertical distribution of both predators and prey. Ostracods and euphausiids were also important prey items, the latter especially in large fish species. Molluscs and larvaceans were restricted to the two species of the family Bathylagidae.