文蛤人工育苗试验

Experiment on Artificial Rearing of Meretrix meretrix

为了给文蛤苗种生产提供技术依据,以促进文蛤养殖业的发展,进行了文蛤的室内人工育苗试验。亲蛤取自浅海滩涂,催产后在水温21～24℃、水体比重1.015～1.020、弱光条件下孵化,再在自然水温、水体比重1.015、光照500 lux、溶氧5 m g/L以上,pH 8.0～8.6条件下培育幼虫,投喂金藻、角毛藻和扁藻,幼体开始营底栖生活时投放附着基。结果,从受精卵发育至稚贝的育苗率近60% ,从D形幼虫到稚虫的成活率为94% 。

In order to offer technical supports to the seed production of Meretrix meretrix and promote the development of its culture. In door experiment on artificial rearing of Meretrix meretrix was carried out in this paper. The brood clams were collected from shallow shoal, after they were induced spawning, their fertilized eggs were hatched under dim light in water with temperature at 21～24℃ and specific gravity 1.015 ～ 1.020 . The larvae were then cultivated in natural water with specific gravity 1.015 , dissolved oxygen over 5 mg/L, pH 8.0 ～ 8.6 and at the light intensity of 500 lux, fed with chrysophyta, goniotrichum and platymonas. The substrate was put into the water when the larvae began their bottom life. As a result, the breeding rate from fertilized eggs to juvenile clams was about 60%, the survival rate from veligers to juvenile clams was 94%.