台湾海峡鲐鱼食性的初步研究

PRELIMINARY STUDY ON THE FOOD OF PNEUMATOPHORUS JAPONICUS IN TAIWAN CHANNEL

一、前言鲐鱼Pneumatophorus japonieus为暖水性中上层鱼类,每年进行季节性洄游,游泳能力强,速度快,春夏时多栖息于水温和盐度较高、透明度大、潮流较缓、风浪较小的海区产卵索饵。此时,也是台湾海峡生产鲐鱼的旺季,有较多产量,有一定的经济价值。本文是一次对台湾海峡的鲐鱼食性进行较详尽的研究,现整理报导如下,以供参考。

The stomach Contents of the Pneumatophorus japonicus were analysed with respect to frequencies, average numbers and average weights of the food taxa. The food of the Pneumatophorus japonicus, which was studied thoroughly for the first time in Taiwan Channel, was dominated by Copepoda, Amphipoda and small fish. The food-attained-rate of Pneumatophorus japonicus have relations with its stomach-full-coefficient and sexual-mature-degree.