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- W2368391311 abstract "Pilot-scale experiments on industrial seedling rearing of clam Cyclina sinensis (Gmelin) were carried outin Dongcai Nursery Factory of Leqing, Zhejiang province and Dongshan Nursery Factory, Jinqiao Salt Industry Co.,Jiangsu province, respectively in 2002 and 2003. The results indicated that under the conditions of watertemperature 26 - 29℃, specific gravity 1.017 - 1.023, and pH 8.1 - 8.5, the induced maturing and natural developing mature parent shellfishes spawned successfully after 5 hours of dry in the shade and inducted spawningwith light covering and aeration for 3 - 5 hours. The induced spawning rate was 100%, the fertilization rate about90%, the fertilized eggs 25 - 36/ml, and the hatching rate 85 --96%. The rearing density of D - shaped larvaewas 7 - 11/ml, and the larvae were all adhesion and metamorphosis after 5 - 6 days. Sea mud was filtered withsieve of 200 meshes, and 2mm thick of mud was settled on the bottom of tank with the adhesive rate of D - shapedlarvae about 80%. In Dongcai Nursery Factory, 2618 kg of spat with size 40,000 - 3, 000, 000 ind/kg were rearedin water body of 1, 000 cu. meters in March to October 2002, of which 796. 5kg of spat were size of 1,000,000 -3, 000,000 ind/kg, with an average unit output of seedling 0.248 kg/m~2 and 1821. 5kg of spat were size 40,000 -2,000,000 ind/kg with an average unit output of seedling 0.495 kg/m~2. In July to October 2003, 1260 kg of spatwith the size of 140,000 - 2,000,000 ind/kg were reared in water body of 1, 000 cu. meters. The unit output ofsmall seedling was 0.25kg/kg, and that of large one was about 2kg/m~2, with an average output of 1.5kg/m~2. InDongshan Nursery Factory, 47. 8 kg of spat with the size of 740,000 - 4,000,000ind/kg were reared in water bodyof 45 cu. meters in July to August 2002. An average output of seedling was 1. 59kg/m~2. In June to July 2003, 72kg of spat with the size of 400,000 - 5,000, 000 ind/kg and 22 kg of spat with the size of 30,000, 000 ind/kg werereared in water body of 231 cu. meters. The total output of seedling was 94 kg and unit output of seedling was 0.29- 0.47kg/m~2." @default.
- W2368391311 created "2016-06-24" @default.
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- W2368391311 date "2004-01-01" @default.
- W2368391311 modified "2023-09-25" @default.
- W2368391311 title "Pilot-scale experiments on industrial seedling rearing of clam Cyclina sinensis" @default.
- W2368391311 hasPublicationYear "2004" @default.
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