赣江中游四大家鱼幼鱼的形态测量与分析

Measurement and Analysis on the Features of the Morphology of four major Chinese carps in the middle reach of Ganjiang river

对赣江中游四大家鱼幼鱼共120尾的形态性状进行测量。结果表明,青鱼、草鱼、鲢、鳙的体长/体高分别为3.78～4.52,3.53～4.273,.13～3.49,3.38～3.66;体长/头长分别为3.84～4.44,3.40～4.10,3.50～3.88,2.93～3.15;头长/吻长分别为4.03～4.47,3.48～4.224,.22～5.28,3.44～4.10;头长/眼径分别为5.11～7.074,.70～5.92,5.61～6.53,5.27～6.79;头长/眼间距分别为1.76～2.081,.73～2.09,1.87～2.25,2.10～2.38。结果显示,4种鱼的种内差异较小,种群比较整齐,但各自表现出特有的形态学特征。

Measured the morphological characters of 120 young fish of four major Chinese carps in the middle reach of Ganjiang river, The body length/body height of black carp, grass carp, silver carp, bighead carp is 3.78 ～4.52,3.53 ～4.27,3.13 ～3.49,3.38 ～ 3.66 ; Body length/head lenght is 3.84 ～4.44 , 3.40～ 4.10,3.50 ～ 3.88,2.93 ～ 3.15 ; Head length/Snout length is 4.03 ～4.47,3.48 ～4.22,4122 ～ 5.28,3.44 4. 10;Head length/ Eye distance is 5. 11～ 7.07,4.70～5.92,5.61～6.53,5.27 ～6.79 ; Head length/ Eye cross is 1.76 ～ 2. 08,1.73 ～2.09,1.87 ～2.25,2.10 ～ 2. 380 The results showed that the intraspecific differ ence in 4 kinds of fishes is small and these population growing tidiness, but 4 kinds of fishes respectively express a special appearance of characteristics.