水库网箱中加州鲈鱼生长的研究
STUDIES ON THE GROWTH OF LARGEMOUTH BASS MICROPTERUS SALMOIDES IN NET CAGE IN RESERVOIRS
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摘要: 在三峡库区一水库内利用诱食剂引诱小型鱼类,为网箱中的加州鲈鱼提供天然饵料,以观测加州鲈鱼的生长情况。通过剪鳍标记方法,把三口网箱中的加州鲈鱼分为六个平行组和一个对照组,平行组的加州鲈鱼掠食被诱食剂引诱进入网箱的小型鱼类,而对照组的则摄食投喂足够数量的小型鱼类。结果表明：(1)平行组和对照组间加州鲈鱼的生长差异不显着;(2)加州鲈鱼的生长是逐渐增大的,生长速率时快时慢,并且呈日趋减缓态势：(3)实验结束时的体重比实验前平均增加了494.1%,平均日增重7.4%;(4)加州鲈鱼的体重与生长时间呈线性关系,生长方程为：W=8.7655+0.7900D(n=81,p=0.0000,r=0.8555);(5)加州鲈鱼的生长质量是不断变化的,似乎遵循瘦-肥-瘦循环生长规律;(6)加州鲈鱼的体长与体重呈幂指数关系,其回归方程为：W=0.00857L3.3335(P=0.0000,r=0.9905).Abstract: From July 16th through September 21th 1998, Juvenile largemouth bass Micropterus salmoides, trained to accept diets, were stocked into three 6 m-square net cage in reservoir, with stocking densities of 9 fishper cage, the fish average span-length 9.5cm, body-length 8.0cm and weight 9.2g. The two net cage (1#,2#) among fin-clipping were marked by removal of left and/or right abdomen fin each 3 fish, other of 3 individually tagged fish was kept unmarked, and the other one net cage (3#) among 9 individually tagged fish was kept unmarked yet. The fish of 3# net cage artificial feeding enough diminutive small-sized fish species, and fish in 1# and 2# net cage prey by artificial allured small-sized fish species of into the net cage. Result make know:(1) Relationship between three net cage, and fin-clipping were marked or not, growth of largemouth bass Micropterus salmoides difference not salience (p＞0.05); (2) The growth is gradually increscent, the speed of growth rate is sometime soon or sometime slow, and is daily gradually decrease; (3) Average weight were increased 494.4%, daily growth rate were 7.4%; (4) The weight and growth times of largemouth bass Micropterus salmoides is linearity connection, the growth equation: W=8.7655+0.7900D(n=81,p=0.0000,r=0.8555);(5) The growth-mass of largemouth bass Micropterus salmoides is variational, seem follow rule of poor rich poor circle growth; (6) Relationship between weight and body-length of the fish is W=0.00857 L3.3335(P=0.0000,r=0.9905).
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Keywords:
- Micropterus salmoides /
- Growth /
- Reservoir /
- Net cage /
- Artificial allure /
- Small-sized fish
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