几种舌鳎的形态和生长特性的比较

由于我国近海传统经济鱼类资源的衰退,渔业资源的增殖和经济品种的养殖已成为海洋渔业经济的重要组成部分。在增养殖品种中 ,经济价值高、生长快、对环境耐受力强的品种自然成为首选的对象。舌鳎属（Ｃｙｎｏｇｌｏｓｓｕｓ）鱼类广布在我国近海的底层水域,该属鱼活动范围小、洄游距离短、围捕率高 ,它们食谱广、生长迅速、初次性成熟早,对环境的适应能力强 ,作为近海海湾的增养殖对象已引起了人们的关注。作者等自１９８５年起对舌鳎属的半滑舌鳎、宽体舌鳎和短吻舌鳎的生物学进行了究 ［１～６］,本文进一步对半滑舌鳎((Ｃｙｎｏｇｌｏｓ…

COMPARISON OF SHAPES AND GROWTH FEATURES OF THREE SPECIES IN Cynoglossus

The comparisons were made in three species of Cynoglossus, Cynoglossus semilaevis, Cynoglossus robustus and Cynoglossus abbreviatus. Cynoglossus semilaevis is not only the longest and the widest in three fishes, but also the thickest when it matures. Cynoglossus semilaevis has the highest head, while Cynoglossus robustus has the longest lip. Cynoglossus semilaevis is not only the largest in size , but also grows fastest. Before one years old, Cynoglossus abbreviatus is larger in size and grows faster than Cynoglossus robustus, but at four years old , Cynoglossus robustus is larger in size and grows faster than Cynoglossus abbreviatus. The inflection points of growth curves of Cynoglossus semilaevis, Cynoglossus robustus and Cynoglossus abbreviatus are 3.24, 2.38 and 2.35 respectively.