摘要
本文报道了黑龙江中游抚远江段鲢鱼渔业生物学状况。鲢鱼捕捞群体的体长与体重的关系为W=0 195 2L2 4 0 50 ;年龄结构以 5龄为主 ;绝对生殖力为 6 6 42 0～ 16 9830粒 ,平均为 10 132 0粒 ;相对生殖力为 718～15 2 5粒 ,平均为 1175粒 ;成熟系数♀群为 1 2 3～ 1 6 0 % ,平均为 1 38% ,♂群为 1 2 6～ 1 5 6 % ,平均为 1 2 7% ;肥满度系数♀群为 8 4 5～ 2 0 0 0 % ,平均为 13 94 % ,♂群为 0 6 4～ 3 0 6 % ,平均为 1 5 8%。该江段鲢鱼种群优势明显 ,但产量已明显呈下降趋势 。
We Fishery biology of Hypophthalmichthys molitrix Cuvier et Valenciennes in the middle section of Heilongjiang River was studied.The relationship between body length and body weight of the capture population can be expressed as W=0 1952L 2 4050 The dominant age was 5 years old Absolute fecundity varied from 66420 to 169830 eggs with a mean of 101320 eggs and relative fecundity varied from 718 to 1525 eggs with a mean of 1175 eggs Gonadosomatic index ranged from 8 45% to 20 00% with a mean of 13 94% of female and from 0 64% to 3 06% with a mean of 1 58% of male Fullness ranged from 1 23% to 1 60% with a mean of 1 38% of female and from 1 26% to 1 56% with a mean of 1 27% of male The Hypophthalmichthys molitrix Cuvier et Valenciennes was dominant but the trend of production decreased sharply in the middle section of Heilongjiang River Therefore we should take some measures to deal with the problem
出处
《水产学杂志》
CAS
2002年第1期19-23,共5页
Chinese Journal of Fisheries
关键词
黑龙江
中游
抚远江段
鲢鱼
渔业生物学
the Heilongjiang River
Hypophthalmichthys molitrix Cuvier et Valenciennes
capture population
fishery biology
