STUDIES ON THE GROWTH OF LARGEMOUTH BASS MICROPTERUS SALMOIDES IN NET CAGE IN RESERVOIRS

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).