摘要
对额尔齐斯河白斑狗鱼和黑龙江黑斑狗鱼的种群结构和生长特性进行比较研究。结果表明,白斑狗鱼由10个年龄组组成,体长与体重的关系式为W=2×10-5L2.9006,生长方程为Lt=1085.49(1-e-0.1372(t+0.60387)),Wt=12658.26(1-e-0.1372(t+0.60387))3,生长拐点为7.42龄,拐点体重为3750.60g,其在8龄前能维持较快速的生长;黑斑狗鱼由7个年龄组组成,体长与体重的关系式分别为W=4×10-6L3.1367,生长方程为Lt=1588(1-e-0.1119(t+0.46587)),Wt=43870.1(1-e-0.111(9t+0.46587))3,生长拐点为9.35龄,拐点体重为12998.55g,其在10龄前能维持较快速的生长:同时探讨2种狗鱼生态学参数的地理差异。鉴于2种狗鱼的资源现状,建议应加强对4+~7+龄个体的保护。
The population structure and growth characteristics of Esox lucius Linnaeus from Ertixhe River and E.reichrti Dyhowsk from Heilongjiang Rive were studied.The results showed that the population of E.lucius had a relatively complex age structure which contained 10 age classes ranging from 1+ to 9+ and 11+.The relationship of length-weight was W=2×10-5L2.9006,and the growth equation of body length and body weight were Lt = 1085.49(1-e-0.137(2t+0.60387))and Wt = 12658.26(1-e-0.137(2t+0.60387))3,respectively.The body weight growth inflexion point was 7.42,with the corresponding body weight of 3750.60g,which indicated fast growth period of E.lucius occurred at the early eight years old.The age structure of E.reichrti Dyhowsk population contained seven age classes.The relationship of length-weight was W=4×10-6L3.1367,and the growth equation of body length and body weight were Lt = 1588(1-e-0.111(9t+0.46587))and Wt = 43870.1(1-e-0.111(9t+0.46587))3,respectively.The body weight growth inflexion point was 9.35,with the corresponding body weight of 12998.55g,which indicated fast growth period of E.reichrti Dyhowsk occurred at the early ten years old.The geographical difference of ecological parameters from two kinds of Esox was also discussed.Results suggested fishes at 4+~7+ should be protected respecting the resource situation of E.lucius and E.reichrti Dyhowsk.
出处
《水产学杂志》
CAS
2010年第3期31-36,共6页
Chinese Journal of Fisheries
基金
环保部全国生物物种资源联合执法检查和调查项目资助(物种08-二-9)
农业部鱼类生物育种实验室(2008NYBZS-11)
黑水研基本科研专项(2008HSYZX-ZH-11)
关键词
白斑狗鱼
黑斑狗鱼
生长特性
Esox lucius Linnaeus
Esox reichrti Dyhowsk
growth characteristics