冬季单体牡蛎池塘育肥初步实验

Study on winter fattening of single- seed Portuguese oyster( Crassostrea angulata) in semi- closed ponds

为提高牡蛎商品品质,开展了池塘葡萄牙牡蛎(Crassostrea angulata)冬季育肥实验。育肥实验设置4个实验组:3组室内水泥池实验组(水温分别为24℃、20℃和16℃)以及1组室外池塘实验组,室内实验组饵料来自于室外池塘藻水。实验结果表明:经过一个月育肥,室外池塘实验组的牡蛎肥满度由13.1%增加到了19.6%,性腺饱满个体比例由13.3%增加到66.7%;室内水泥池实验组牡蛎肥满度无明显变化。池塘实验组牡蛎糖原含量稍有增加,水泥池实验组下降。池塘育肥葡萄牙牡蛎效果明显。

In order to improve the quality of single-seed Portuguese oyster （ Crassostrea angulata） , a fatte-ning experiment was carried out in winter. The experiment set up 4 treatments： 3 indoor ponds treatments （ water temperature was 24 ℃, 20 ℃ and 16 ℃） and a semi-closed pond treatment. The food for indoor ponds treatments was the semi-closed pond water with natural algae. The results showed that： after a month of fattening, the meat condition of single-seed oyster in outdoor semi-closed pond was increased from an average of 13. 1% to 19. 6%, and the proportion of full gonad mature individuals increased from 13. 3% to 66. 7%. However, indoor concrete ponds treatments had no significant changed. The glycogen was increased in semi-closed pond treatment, while decreased in indoor ponds treatments. In conclusion, fattening in semi-closed pond for single-seed Portuguese oyster was more effective.