【摘要】 本文研究了黑龙江水系鳜鱼的年龄与生长、产卵繁殖．食性等生物特性。通过鳃盖骨上形成的年耗测定年龄和推算：Ｌ１＝１３．１ｃｍ；Ｌ２＝２２．６ｃｍ，Ｌ３＝２９．１ｃｍ……Ｌ１２＝５３．９ｃｍ。体重与体长相关式为，Ｗ＝０．０３６０４Ｌ２．８８１１，ｒ＝０．９９８。根据Ｖｏｎ．Ｂｅｒｔａｌａｎｆｆｙ生长方程理论公式拟合的生态学参数：Ｌ８＝６２．８ｃｍＷ８＝５８１７ｇ；ｔ０＝－０．１２，Ｋ＝０．１７：ｒ＝０．９９５；ｔｉｐ＝６．３龄，ｔｍａｘ＝１７．５龄。黑龙江鳜鱼的生殖期为每年６月中旬至７月末，成熟个体的成熟系数：雌体平均为５．５８±１．９７；雄体体平均为２．１２±０．３８，生殖后的成熟系数，雌体平均为１．６０；雄体为０．７１。３０—６０ｃｍ体长的怀卵量平均为１８４０９７粒，卵径为１．３５ｍｍ。鳜鱼的食供，解剖２７尾胃中有食的标本，有８种鱼类和１种虾。１９８４年与１９６３年相比，黑龙江鳜鱼的资源量出现衰退趋势。更多还原

【Abstract】 This paper reports the age, growth, breeding and feeding habit of Mandarinfish in Heilongjiang River.1. Examining the opercular bone for age determination, and growth study,and back calculated standard length were: L1 = 13.1cm; L2 = 22.6cm;L3 = 29.1cm ……L12 = 53.9cm. The relationship between body weight and stsndard length was:w =0. 03604L2.8811, r = 0.998. The characters of growth were analysed using Von. Betalanffy growth equation, the estimated Parameters were: L= 62. 8cm; w = 5 871gt0 = - 0.12: k= 0.17; r = 0.995, Tip = 6.3 years; Tmax = 17.5 year.2. The spawning season of Manadarinfish starts from mid June to late July in Heilongjinag River. Donadoaomatic index of male female female at IV maturity stage were 5 .58 ± 1 .97 and 2.18 ± 0.38, and at VI maturity stage were1 .60 and 0.71. Standard length from 30 to 60cm of male, the mean value of fecundity are 184 097 grain, diameter of maturity egg are 1 .35mm.Sex ratio are 1: 0. 8 of spawning population.3. The fish feed chiefly on other fishes. Feeding habit of 27 specimenswere dissected and determined to be 8 spotes of fishes and 1 species of shrimp in the stomach.4. The resources of Mandarinfish in 1984 shows atendepey of decreasing in amount, compared with that in 1963.更多还原