绢丝丽蚌的繁殖习性研究

REPRODUCTIVE HABITS OF Lamprotula fibrosa (Heude)

绢丝丽蚌的性腺发育分为增殖期、生长期、成熟期、排放期和休止期５个时期。９月为成熟期，１０月进入排放期，１０月至翌年１月中旬为繁殖期。一年一个生殖周期，一次产卵类型。以雌蚌两片外鳃为育儿囊。钩介幼虫呈亚三角形，有壳钩和足丝。壳钩上有棘刺，壳表有凹穴。建议每年２月至６月为网湖绢丝丽蚌的采捕季节，蚌耙龄距为３．６ｃｍ。在湖区建立绢丝丽蚌保护区，人工繁育幼蚌放流，以达到绢丝丽蚌永续利用的目的。

Taking the developmental characteristics gametes in follicles and features of follicles into account, the annual cycle of maturation for both male and female Lamprotula fibrosa can be divided into the following five periods: (1) proliferation period, March to May, (2) growth period, June to Aug., (3) ripe period, September, (4) Spawning period, October, (5) resting period, November to February of next year. Two pieces of outer gill of the female are used as marsupium. In a yearly cycle, a individual L. fibrosa spawns once. The glochidium, which has one spined hook at each ventral margin and hollows on the surface, is subtriangular. Larval threads stretch out from the edge of hinge. In order to make a everlasting use of L. fibrosa , it is proposed that the reasonable caputre time should be from February to June every year, the distance of rake teeth of L. fibrosa should be 3.5 cm, protective zone should be built in the Wank Lake and young clam which be bred artificially should be stocked.