几种常见鲤科养殖鱼类肌间刺的初步研究

对鲢、鳙、团头鲂和异育银鲫肌间刺的数目、形态和分布进行分析研究，结果显示：鲢的肌间刺数目在117～124之间，鳙的肌间刺数目在116～133之间，团头鲂的肌间刺数目在114～129之间，异育银鲫的肌间刺数目在79～87之间。每条鱼左右两侧的肌间刺数目不完全相等，但总体上两侧肌间刺的数目接近。不同部位的肌间刺数目也有差异：躯干部轴上肌中的肌间刺数目最多，尾部轴上肌与轴下肌中的肌间刺数目基本相等。鲢、鳙、鲫和团头鲂的肌间刺形态都在10种以上。这几种鱼每条鱼的躯干部轴上肌中都有一根很细很短的“l”形刺，这根最短刺的长度在不同规格的鱼上差别并不大。

Preliminary study on intermuscular bones of several cultured cyprinids

The number,shape and distribution of intermuscular bones were observed in silver carp(Hypophthalmichthys molitrix),bighead carp(Aristichthys nobilis),blunt snout bream(Megalobrama amblycephala) and crucian carp(Carassius auratus gibelio).The results showed that the number of intermuscular bones in silver carp was between 117 and 124,in bighead carp was between 116 and 133,in blunt snout bream was between 114 and 129,in crucian carp was between79 and 87.The intermuscular bone number was not absolutely equal in both body sides although the number was quite similar.The bone number varied in different parts of fish body.There were more bones in the front dorsal part while bone number was almost equal in rear dorsal part and rear abdominal part.There were more than 10 types of bone shape in silver carp,bighead carp,blunt snout bream and crucian carp.A tiny l-type bone was observed in all of experimental fish,and the length difference of this bone was very small in the fish of different sizes.