珠江口东岸池养鲻鱼的年龄与生长

STUDY ON THE AGE AND GROWTH OF GREY MULLET(MUGIL CEPHALUS LINNAEUS)IN CAPTIVITY ON THE EASTERN COAST OF ZHUJIANG RIVER ESTUARY

研究池养条件下鲻鱼ＭｕｇｉｌｃｅｐｈａｌｕｓＬｉｎｎａｅｕｓ的年龄和生长特性，结果表明，鳞片新年轮主要在１０—１月出现；鳞长与体长关系式为：Ｒ—０．００９０７Ｌ（０．７７６４）；Ｉ—Ｖ龄鱼体长和体重相对生长率和生长指标随着年龄增长而逐渐下降；体长与体重关系式为：Ｗ＝１．２７１６×１０（－５）Ｌ（３．０６９５），体长与全长关系式为：ＬＴ＝１０．３７１１＋１．１８０６ＬＢ，当年鱼体长和体重生长与月龄的关系分别为：ＬＢ＝８．６６６９＋２５．５７６９ｔ，Ｗ＝０．１１７０ｔ（３．５５３０），ｖｏｎＢｅｒｔａｌｌａｎｆｆｙ生长参数Ｌ∞＝６１３．２５ｍｍ，Ｋ＝０．３４１２，ｔ０＝－０．８２５，体重生长拐点值为２．４６ａ。

This paper deals with the age and growth of grey mullet, Mugil cephalus L. collected from fish farms located in Shenzhen and Dongguan of Guangdong Province, in the period 1987-1992. The results thus obtained are as follows:(1) Scale annulus formed mainly from October to January;(2) Relationship between scale radius and body length is: R=0. 009 07L0.776 4;(3) Relationship between body length and body weight is: W= 1. 2716 ×10-5L3. 0695;(4) Relationship between body length and total length is: LT=10.371 1+ 1.180 6LB;(5) Monthly growth curves in body length and weight of one-year-old fish can be expressed by LB=8. 666 9+ 25. 576 9t and W=0.117 0t3.553 0, repectively;(6) Growth rate of this fish up to 5-year-old is computed by using back-calculating method;(7) The von Bertallanffy growth curve parameters derived from the mentioned data are:L∞ = 613. 25mm, K=0. 341 2, t0=-0.825 years, turning point of growth in body weight is: 2. 46 years.