武昌南湖圆背角无齿蚌食性与生长的研究

对武昌南湖圆背角无齿蚌的食性与生长特点进行了研究，该蚌主要摄食绿藻、蓝藻、硅藻、有机碎屑；对食物大小有一定选择性，其主要食物大小为（长×宽）：２～３０μｍ×１～７μｍ；除１月份外，几乎全年都摄食，以夏季为旺；４＋龄以前生长较快，其中１＋～２＋龄生长最快，４＋龄以后生长减慢，５～８月份为壳长生长盛期；体重和软体部以３～４月和６～９月生长为旺，软体部分除５月不增重外，其它时间都增重；体重与壳长、壳高、壳宽呈指数相关，体重与软体重、壳长与壳高、壳宽呈直线相关。

A STUDY ON THE DIEF AND GROWTH OF Anodonta Woodiana Pacifica (HEUDE) IN SOUTH LAKE, WUHAN

Studies on the diet and growth of Anodonta woodiana pacifica (Heudeo) in South Lake, Wuhan, are curtied out and the results are reported as follows: Heude predominately feeds on green and blue algae, diatoms and detritus. It has, to some extent, a choice on the size of tood. The size of most of its food is 230 m17 m. It feeds in each month except January. The peak period of feeding occurs in summer. It grows quickly before 4+ age, particularly, in 1+2+ age, and its growth decreases gradually after 4+ age. The peak of growth in shell length occurs form May to August. There are two peak periods of the growth: form March to April, and June to September. The softbody weight increases in each month except May. The relationships between weight and shell length, height, or width are exponential, and those between weitht and softbody weight, between shell length, height and width are linear.