一九七五年四月我场从广东顺德县试验场引进5—6朝东北银鲫2400尾进行试养,现将饲养观察情况简报如下: 一、主要形态特征和比例性状银鲫的形态特征:背部为黑灰色,体侧和腹部深银白色。背鳍3,18—19,臀鳍7,侧线鳞30(6/(6-r))31,咽齿4/4。从比例性状看:1.银鲫是一种高背型的品种。成年个体的背部在头部,后有明显隆起, In April 1975, we conducted trial rearing of 5-6 North-Eastern silver crucian carp (Carassius auratus) 5-6 from the Shunde County Experimental Field in Guangdong Province. Briefing on rearing observation is as follows: I. Main morphological characteristics and morphological characteristics of silver carp : The back is dark gray, body side and abdomen deep silver white. Dorsal fin 3,18-19, anal fin 7, lateral scales 30 (6 / (6-r)) 31, pharynx 4/4. From the proportion of traits to see: 1. Silver crucian carp is a high-back type. Adult individual’s back in the head, after the obvious bulge,