塔里木河流域胜利水库云斑鮰年龄与生长研究

A ge and Growth of Ictalurus nebulosus about Shengli Reservoir in Tarim River Basin

2013~2014年春秋两季通过对塔里木河流域胜利水库云斑鮰的采集样本50尾观察,运用传统生物学测量方法鉴定年龄,分析其生长特征。结果表明,胜利水库云斑鮰的最小年龄1,体长6.41 cm,体重2.279 g;最大年龄3＋,体长16.54 cm,体重67.165 g。平均年龄1.67,体长10.701±3.58 cm,体重19.43±19.12 g。种群（n=50）总体体长和体重相关方程为：W=0.0060L3.258 5（R2=0.973 7）;渐进体长L∞=21.315 cm,生产系数k=-0.141,W∞=128.136 g,ti=1.56,t0=-0.245;种群总体体长和体重生长方程为：Lt=21.315（1-e0.141（t＋0.245））;Wt=128.136（1-e0.141（t＋0.245））3.258 5。胜利水库云斑鮰属匀速生长类型,虽然适应性较强,但生长性状不稳定,整体偏瘦;在种群动态和渔业生态平衡中,起到了一定的作用。

To collect 50 tails of Ictalurus nebulosus,using biological measurement method to identify biological age,analyze its growth characteristics,at the Spring and autumn from 2013 to 2014. The results showed that the age minimum is 1,body length is 6. 41 cm and body weight is 2. 279 g; the age maximum of 3 ＋ body length is 16. 54 cm,body weight is 67. 165 g,the average age is 1. 67,body length is 10. 701 ± 3. 58,,body weight is 19. 43 ± 19. 12 g. Relationship of body length and body weight： W = 0. 006 0L3. 258 5（ R2= 0. 973 7）; The progressive body length of Ictalurus nebulosus from Shengli reservoir,that L∞= 21. 315 cm,k =- 0. 141,W∞= 128. 136 g,ti= 1. 56,t0=- 0. 245; Population（ n = 50） equation of body length and body weight： Lt=21. 315（ 1- e0. 141（ t ＋ 0. 245）） ： Wt= 128. 136（ 1- e0. 141（ t ＋ 0. 245）） 3. 258 5. Ictalurus nebulosus from Shengli reservoir,Allometric growth,strong adaptability,growth traits is not stable,It playeda role in the population dynamics and ecological balance of fisheries.