Some Ecological Aspects of Larval Fishes in Waters off Central Japan
Some Ecological Aspects of Larval Fishes in Waters off Central Japan
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日本中部海域幼鱼的一些生态方面
DOI：
10.2331/suisan.38.981
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发表时间：
1972
影响因子：
0.4
通讯作者：
H. Ida
中科院分区：
文献类型：
--
作者：
H. Ida
在日本中部近海沃茨进行了400多次表层和次表层拖捞，以获得有关仔鱼分布特征的信息。结果表明：（1）共采集仔鱼72000余尾。春季至夏季的物种数和个体数均较高，以鳀、鲭、竹荚鱼、粗枝鱼、Thunnus thynnus和无刺梭子鱼为代表。(2)幼虫的垂直分布可分为以下三种类型：（i）只出现在表层的物种，（ii）出现在远低于表层的物种和（iii）从表面到几十米深处的物种。幼虫的分布深度与色素细胞的发育程度呈负相关。(3)优势种幼虫从表层到亚表层呈分层分布，其分布带随生长而上移。鳀鱼表层分布日变化显著，主要是由较大个体的幼虫垂直迁移引起的。
More than 400 towings of surface and sub-surface layers were carried out to obtain informations on the distributional features of larval fish in the waters off central Japan. The results obtained are as follows: (1) More than 72000 individuals of larval fish were collected. Abundance in both number of species and individuals was high during spring to summer and most of these samples were represented by Engraulis japonica, Scomber japonicus, Trachurus japonicus, Myctophum asperum, Thunnus thynnus and Sebastes inermis, given in the order of abundance. (2) Larval forms are classified into the following three types from their vertical distributions; (i) species appearing only at surface layers, (ii) species appearing at layers far below the surface and (iii) species appearing from surface to the depth of some several ten meters. There is an inverse correlation between the depth of distribution of larvae and the degree of development of chromatophores. (3) Larvae of the dominent species are distributed at layers from surface to sub-surface layers and their zones of distribution move up with their growth. The remarkable diurnal changes of distribution of Engraulis japonica at surface layers are caused by vertical migration of larger sized larvae.