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鱼类的型态型不仅在分类学上有意义,在选种育种中也有意义。白鲢以上枕骨末端形态分4个型,鲻鱼以犁筛骨形态分2个型,梭鱼以犁筛骨形态分3个型。 1.白鲢Hypophthalmichthys moltrix(Cuvier et Valenciennes) 侧线鳞80-137。以上枕骨末端形态分4个型。①白鲢模式型H.moltrix forma moltrix(Cuvier et Valenciennes)上枕骨末端分叉,左右相等。分布黑龙江、辽河、海河、长江、钱塘江、闽江、西江等水系。②白鲢左长型H.moltrix forma sinensis Li上枕骨末端分叉,左右不相等,左长右短。分布天津、珠江、海南岛。③白鲢右长型H.moltrix forma heterosinennes Li上枕骨末端分叉,左、右不相等,左短右长。分布天津、海南岛。④白鲢愈合型H.moltrix forma changkianensis Li上枕骨末端愈合,愈合部长。分布海河、长江。偶见。
The type of fish is not only taxonomically meaningful, but also meaningful in seed selection. Silver carp above the end of the occipital shape is divided into 4 types, catfish plow sieve bone morphology divided into 2 types, barracuda plow sieve bone morphology divided into 3 types. 1. Silver carp Hypophthalmichthys moltrix (Cuvier et Valenciennes) lateral scales 80-137. More than the end of the occipital shape of 4 types. ① silver carp model H.moltrix forma moltrix (Cuvier et Valenciennes) on the occipital distal bifurcation, left and right. Distribution of Heilongjiang, Liaohe, Haihe, Yangtze River, Qiantang River, Minjiang River, Xijiang River. ② silver carp left long-shaped H.moltrix forma sinensis Li bifurcation at the end of the occipital, left and right are not equal, left and right short. Distribution of Tianjin, Pearl River, Hainan Island. ③ silver carp right long H.moltrix forma heterosinennes Li on the end of the occipital bifurcation, left and right are not equal, left short right long. Distribution of Tianjin, Hainan Island. ④ silver carp healing H.moltrix forma changkianensis Li distal occipital healing, healing minister. Distribution Haihe, Yangtze River. Occasionally.