斑鳢(♀)×乌鳢(♂)不同组合F1代养殖性能分析

摘要

Four combinations: SG, ZG, JG, HG were formed from hybrids between one stock of Channa maculate from Guangdong and 4 different stocks of Channa argus from Shandong, Zhejiang, Hunan and Jiangxi. The F, fish fry of the four combinations was cultured in 6 m x 2 m (length x width) small cement pool and 6 m x 5. 5 m large cement pool. The advanced fry with fluorescent mark was polycultured in3mx 3mx 1.4m cages. Results showed that the body length increment and weight increment of SG combination F, was 34. 80 cm and 582. 54 g, which were the largest in the 4 combinations F1. Average catching size and net production of SG combination F, was the highest, which were 582. 54 g and 38. 83 (100 g/m2), and significantly larger than those of the ZG, JG and HG combinations F, after variance analysis and multiple comparison. SG combination F, displayed significantly better growth performance and culture characteristics.%用同一广东群体斑鳢(Channa maculate)和4个不同地理群体乌鳢(C.argus)杂交,建立4个杂交组合:广东斑鳢♀×山东乌鳢♂(SG)、广东斑鳢♀×浙江乌鳢♂(ZG)、广东斑鳢♀×江西乌鳢♂(JG)和广东斑鳢♀×湖南乌鳢♂(HG).将它们的F1代鱼苗根据不同阶段,分别饲养在规格为6m×2m(长×宽)小水泥池和6 m×5.5 m(长×宽)大水泥池中,将它们的F1代鱼种通过荧光标记后混养在规格为3m×3m×1.4m(长×宽×高)网箱中.对各组合F1代的生长性能和养殖效果进行比较,结果表明:广东斑鳢♀×山东乌鳢♂ (SG)组合F1代的养殖效果最好,体重、体长增加量最大,分别为582.54 g和34.80 cm.且生长速度最快,平均起捕规格582.54 g和平均产量38.83( 100 g/m2),均显著大于其余3个组合的F;代.