【摘要】 <正> 四角蛤蜊 (Mactra quadranglaris Deshayes)是习见的底栖经济贝类,肉细嫩、味鲜美,是我国颇有养殖前途的贝类之一。四角蛤蜊在江苏沿海滩涂的自然分布广,共资源量仅决于文蛤,內销价格高于文蛤;它虽与文蛤常混生于同一滩面,但分布部位略偏高,有利更多还原

【Abstract】 Sexually matured parent clams were put in the dark to drain away the water, then rinsed in running water for some time before being transfered into seawater with amonia for breeding. Breeding rate is about 60.8-80.0%.The development of embryo is faster with rising temperature, but larva grows faster in 17.5-22.7℃. Embryo grow faster at specific gravity 1.020-1.025, but larva in specific gravity 1.010-1.025.Young larvae were fed with "7902" (an unidentified algae) sands were being added before metamorphosis as substratum. Water is changed every day and aerated regularly. It takes 45 days for the fertilized egg to develop into a seeding of 0.2-0.3cm long.更多还原