洛河兴凯鱊的生物学特性初步研究

摘要

在洛河中共随机采样兴凯鱊183尾，测定了体长、全长、体重、年龄、食物组成、个体生殖力等指标，对兴凯鱊的年龄生长、食性和繁殖等基本生物学特性进行了初步的研究，得出以下主要结论：渔获兴凯鱊由0＋～2＋龄共3个年龄组组成；兴凯鱊全长与体重关系比体长更为密切，其关系式为：W ＝7．9×10－3 L ，3．2564（R2＝0．9418）；兴凯鱊为杂食性鱼类，主要以腐屑、浮游生物等为食。兴凯鱊个体绝对生殖力（ F）范围为870～1600粒，平均1205．7粒。%The biological characteristics of Acheilognathus chankaensis in Luohe river was studied by measurement of the body length ,body weight ,age ,diet composition and individual fertility indica‐tors ,etc .The Acheilognathus chankaensis is composed of age groups0+ 、1+and 2+ in catches .The full length is closer association with the body weight than the body length .The relationship between them can be expressed by the equation W = 7 .9 × 10-3 L ,3 .2564 (R2 = 0 .941 8) .Its diet composition mainly in‐cludes rot cuttings ,plankton ,etc .Its individual absolute fecundity (F) range is 870~1 600 with an average 1 205 .7 .