东海南部鲐鱼生物学特征研究

Approach on Biological Characteristics of Scomber japonicus in The Southern East China Sea

本文根据1999年～2003年7月、8月在东海南部进行的4次鲐鱼围网调查资料,对东海南部海域的鲐鱼生物学特性进行研究.鲐鱼最小叉长为15.4cm,最大为28.8 cm,平均叉长22.1 cm;优势叉长组为19～25cm,其出现频率为80%.2002年、2003年鲐鱼叉长组成个体比1999年、2001年大;鲐鱼叉长与体重的关系进行拟合后的关系式为:W=0.0034L3.3401;鲐鱼胃饱满度以0级为主,占70%;年龄组成以当龄鱼为主.

This paper gives an study on the biological characteristics of the chub mackerel(scomber japonicus ) on the southern waters of East China Sea based on four chub mackerel (scomber japonicus) purse seining researches data collected from 1999 to 2003.The minimum fork length of scomber japonicus is 15.4 cm, biggest for 28.8 cm, average for 22.1cm.The dominant fork length is 19～25cm,its emergence frequency is 80%.The fork length constitution of the chub mackerel in 2002 and in 2003 are bigger than in 1999 and in 2001.The relationship between its fork length and weight can be described as W = 0.0034L~ 3.3401.The feeding grade mainly is 0 grade ,about 70%. The most of age constitution is 0 age fish.