光唇鱼与凡纳对虾池塘混养技术初探

Preliminary study on polyculture techniques of Acrossocheilus fasciatus and Litopenaeus vannamei

在一口面积0.347hm2,水深2m的池塘放养体长2～4cm的光唇鱼苗28000尾和体长0.8～1.0cm的凡纳对虾(俗称南美白对虾)虾苗100×104尾(分别在5月中旬和8月下旬2次投放,各投50×104尾),经215d的饲养,收获商品光唇鱼295.3kg,折合产量851.0kg/hm2,成活率59%;两季对虾产量4000kg,折合产量11527.4kg/hm2,成活率17%。每公顷利润100187.3元。光唇鱼生长速度慢,体长、体重日增长率分别为0.076g/d和0.030cm/d,经统计体长(L)与养殖时间(t)的回归方程:L=0.0295t+3.475(r=0.9939);体重(W)与养殖时间(t)的回归方程:W=0.0854t+0.7633(r=0.9824)。实验表明光唇鱼与对虾混养可确保鱼虾双丰收。

28 thousands of Acrossocheilus fasciatus and one million of Litopenaeus vannamei （ each 50000 shrimps was stocked in mid - May and late August, respectively） were polycultured in a pond with area of 0. 347 hm2 and water depth of 2. 0 m, which the body length of fish and shrimp were 2 ~ 4cm and 0. 8 ~ 1.0cm, respectively. After 215d＇s culturing, 295.3kg of fish and 4000kg of shrimp were harvested, which the yield of fish and shrimp were 851.0 kg/hm2 and 11527.4/hm2, and the survival rate were 59% and 17%, respectively. The results showed that the growth rate of Acrossocheilusfasciatus was very slow, and the rates of weight gain and length gain were 0. 076g/d and 0. 030cm/d , respectively. The regression equation of the body length （L） and culture time （t） was L = 0. 0295 t ＋ 3.475 （r = 0. 9939）. The regression equation of body weight （W） and culture time （t） was W = 0. 0854t ＋ 0. 7633 （ r = 0. 9824）. The experiment indicated that the polyculture pattern was able to ensure the bumper harvest of fish and shrimp.