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》 1986年第4期419-431,共13页

摘　　要： 南方白甲鱼是珠江水系的重要经济鱼类之一。本文中,作者对其形态、年龄和生长、繁殖、食性、分布和渔业等问题作了调查和研究。 Varicorhinus gertachi (Peters)Is one of the important economical fishesof the Bei Jiang River, Guandong Privince. This paper deals with the characteristics ofmorphology, age and growth, distribution, reproduction and feeding habits of thisfish. The age of the fish was detrmined according to the number of annual rings for-med by the 'common' type of ciculi on the scale. The'common'type of circuli is firm-ed between May and September.The relationship between body length(L) and leng-th of scale (S) may be expressed as L=5.63S--0 .912. Specimens include 1-4 year?individuals, the largest one is 800 g,which is 4 years old and with a body length of 35cm. The interrelationship between body length(L) and body weight(W) may be exp-ressed as W=4.79×10-^(?)× L3.3993. The spawning season of the fish is from April toeJune. The age of maturity is two years old. They attained a body length over 15 cmand body weight of over 50 g. The sex ratio of the fish is about 1:1. The fertilizedeggs of V. gertachi are spherical in shape, 2.1-2 .2mm in diameter, and lightly sti-cky. The absolute fecundity of female is 4000-5000 eggs, and relative fecundity is 8-13 eggs per gram of body weight. The fish feeds mainly on algae and benthos. Atlast, the rational exploitation of the resources is also briefly discussed.

关 键 词： 南方白甲鱼 生物学 珠江水系 形态 年龄 生长 繁殖 食性 分布 渔业

领　　域： [生物学] [农业科学] [农业科学]