天津地区大口黑鲈混合养殖试验

Polyculture experiment of the largemouth bass(Micropterus salmoides)in Tianjin

为提高大口黑鲈养殖的经济效益和生态效益,开展了大口黑鲈混养试验,即大口黑鲈与南美白对虾、大口黑鲈与河蟹、大口黑鲈与黄颡鱼的混养模式试验。大口黑鲈与南美白对虾接力混合养殖,南美白对虾投放规格1 cm的苗种,密度45万尾/hm^(2),收获成虾规格42尾/kg,单位产量6318.75 kg/hm^(2),大口黑鲈投放规格150 g/尾,170 m^(3)水槽投放2000尾,收获规格0.79 kg/尾,养殖槽产量1548.4 kg;大口黑鲈与河蟹混养,大口黑鲈投放规格120 g/尾,密度22500尾/hm^(2),单位产量13162.5 kg/hm^(2),投放河蟹苗种规格5.12 g/只,密度7500只/hm^(2),收获河蟹546 kg/hm^(2);大口黑鲈与黄颡鱼混养,大口黑鲈鱼种规格120 g/尾,密度22500尾/hm^(2),收获大口黑鲈13252.5 kg/hm^(2),投放黄颡苗种规格68.25 g/尾,密度3000尾/hm^(2),收获黄颡鱼918 kg/hm^(2)。除接力混养南美白对虾需要投喂,河蟹、黄颡鱼不需投喂。大口黑鲈混养模式在不增加人力物力的情况下既提高了养殖经济效益,同时对水质调控有良好效果。

In order to improve the economic and ecological benefits of the largemouth bass(Micropterus salmoides)culture,largemouth bass polyculture experiments were carried out,that is,largemouth bass and the whiteleg shrimp(Litopenaeus vannamei),the largemouth bass and the river crab(Eriocheir sinensis),the largemouth bass and yellowtail fish(Pelteobagrus fulvidraco).The largemouth bass and the whiteleg shrimp were relayed and reared,and the shrimp seeds of 1 cm length were stocked with a density of 450,000 ind./hm^(2),and was harvested with 42 ind./kg,with a unit yield of 6318.75 kg/hm^(2).The stocking size of the largemouth bass was 150 g/ind.with 2000 seedlings stocked in 170 m^(3) tank.The harvest size was 0.79 kg/ind.with an total output of 1548.4 kg.The largemouth bass and the river crab were polycultured,stocking size of the largemouth bass was 120 g/ind.,with the density 22500 ind./hm^(2),reaching a unit yield of 13162.5 kg/hm^(2),the stocking size of the river crab seedling was 5.12 g/ind.,with the density 7500 ind./hm^(2).The average output of the river crab was 546 kg/hm^(2).The largemouth bass was polycultured with the yellowtail fish,the stocking size of the largemouth bass was 120 g/ind.with a density of 22500 kg/hm^(2),the output of the largemouth bass was 13252.5 kg/hm^(2),the stocking size of the yellowtail was 68.25 g/ind.with a density of 3000 ind./hm^(2),and the output of the yellowtail fish was 918 kg/hm^(2).Except for in the relay polyculture mode,the shrimp needs to be fed,in the other modes,the river crabs and the yellowtail fish do not need to be fed.The polyculture mode of the largemouth bass not only improveed the economic benefits of breeding without increasing manpower and material resources,but also had good effects on water quality control.