作　　者： ; ;

机构地区： 华南师范大学生命科学学院生物科学系

出　　处： 《水产学报》 1983年第4期353-363,共11页

摘　　要： 本文根据我们 1975—1982年所进行的试验,对广泛分布和养殖于我国南方各地及东南亚各国的淡水鲇类——胡子鲇的形态、生殖力和成熟系数的年周期变化作了分析研究,为进行胡子鲇的人工繁殖提供了理论依据。 Clarias fuscus (Lacepedae) is a fresh water catfish and has been reared in SouthChina and South Asian countries. In present paper, we deal with its morphology, re-production capacity and the change of maturity coofficient in annual cycle by analysingthe result of our experiment in 1978--1982.The content may be summarized as follows:1. According to the data from 529 fish, the relationship between body weight (W)and body length (L) may be expressed as W = 0.1922 L^(2.1365). The regression coefficientof these two varieties of Clarias fuscus from 13.5--35 cm in body length 19 different be-tween female and male. The former is 1.025 (W = 10.8696L -115.2174) and the latter,0.834(W = 9.375L-95.625). In normal conditions, the female is found to be of relativeplumpness 1 .43--1 .78, the male, 1 .23--1.41. Differences of both figures are significant.External characteristics, by comparing the diameter of eyes, interorbital space, theshape of snout, the shape of head, etc. are suffciently reliable for the identification ofboth sexes.2. The data of reproduction capacity from 86 fish, the formulas of relation be-tween body lengh (L) or body weigh (W) and average absolute breed amount (R)may be expressed as R = 0.09586L-7.3756364 and R=0.047741W-0.676548.From 179 fish, the relation between body weight (W) and average absolute spaw-ning amount (R) may be expressed as R = 39.12195W--1840.02439. The largest averagerelative breed amount of the female has a body length of about 14.5--20.5 cm, bodyweight, 53--115g. The average relative breed amount is 61.321--78.62 eggs per gramin body weight. The largest average amount has a body weight of about 108--216g. Theaverage spawning amount is 20--35 eggs per gram in body weight.3. The annual cycle of the change of maturity coefficient is 13--15% (female) or2--3% (male) in the breeding season and less than 5% (female) or 1%(male) inother seasons.

关 键 词： 生殖力 年周期变化 胡子鲇 成熟 形态 养殖 南方 淡水 分析研究

领　　域： [农业科学] [农业科学] [生物学]