Size selective feeding and its limitations for the black rockfish, Sebastes inermis, in a demersal fish assemblage of Onagawa Bay, northeastern Japan
Size selective feeding and its limitations for the black rockfish, Sebastes inermis, in a demersal fish assemblage of Onagawa Bay, northeastern Japan
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日本东北部女川湾底层鱼类群中黑岩鱼 Sebastes inermis 的体型选择性摄食及其局限性
DOI：
10.1023/a:1007331501193
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发表时间：
1997
影响因子：
1.4
通讯作者：
Masatoshi Kan
中科院分区：
文献类型：
--
作者：
H. Honda;Masatoshi Kan
采用实验室实验和胃含物分析的方法，研究了日本东北部女川海湾底栖生物群落中黑岩鱼(Sebases Inermis)的体型选择性摄食。在实验室实验中确定了黑岩鱼的最佳摄食大小。黑石鱼在自然条件下摄食的平均摄食量(150-227 mm)远小于实验室条件下摄食量(148-158 mm)。在实验室实验中，鱼最喜欢的食物大小在自然条件下很少找到。基于胃内容物分析的鱼类组合中鱼类物种的竞争系数分析表明，找到理想食物大小的程度取决于食物的可获得性、与其他鱼类的竞争以及鱼类的摄食能力。在自然条件下，鱼类群体的种内和种间竞争可能是限制鱼类食物大小选择的因素。
The size selective feeding of the black rockfish, Sebastes inermis, in a demersal fish assemblage of Onagawa Bay, located in northeastern Japan, was studied using laboratory experiments and stomach content analysis of the dominant demersal fish coexisting with the black rockfish in Onagawa Bay. The preferred food size of the black rockfish was determined in the laboratory experiments. The average food size taken by the black rockfish (150–227 mm long) under natural conditions was much smaller than that taken by fish in laboratory experiments (148–158 mm sized). The most preferred size of food taken by fish in laboratory experiments was rarely found under natural conditions. Analysis of the competition coefficients of fish species in the fish assemblage based on stomach content analysis suggested that the degrees to which the preferred food size was found depended upon the foods availability, by competition with other fish species and by the feeding ability of the fish. Intra-and inter-specific competition in a fish assemblage might be limiting factors on the food size selection of fish under natural conditions.