南湾鲫鱼年龄与生长的研究

Studies on Age and Growth of Crucian carp from Nanwan

2000-2002年在信阳南湾水库采集的414条鲫鱼进行年龄鉴定与生长研究．结果表明，南湾鲫立的年轮形成时间为5月至9月．分析了体长、体重和年龄结构，得到体长与体重的关系式为W=2．965×10^-3L^4.006．用Von Bertalanffy生长方程拟合，得体长生长方程Lt=30．12[1-e^0.15（1＋0.0722）]、体重生长生长方程Wt=1097．32[1-e^-0．199（t＋0．0722）]^4.006．

This paper detailed with ecoiogical research on the age and growth of 414 speciments of crucian carp collected from Nanwan in Xinyang in 2000 - 2002. The new annual rings on scales of the crucian carp appear from the first ten days of May to the middle ten days of semteper. The frequency distributions of body length and weight ,age structure were analysed, and the relationship between body length and weight was W = 2. 965 × 10^-3 L^4.006. The growth pattern can be fitted by Von Bertalanffy equation as：Lt =30. 12[1 -e^-0.15（1＋0.0722）], Wt = 1097.32[ 1 - e^-0.199（t＋0.0722） ]^4.006.