池塘工程化循环水养殖加州鲈试验

Experiment on culture of largemouth bass,Micropterus salmoides,in engineering water re-circulating tanks

利用池塘工程化循环流水养殖模式的4条养殖槽开展不同密度加州鲈养殖试验,池塘面积25×667m2,养殖槽规格均为长22m、宽5m、深2.5m,分别放养平均规格为50g/尾的加州鲈苗种20000尾、30000尾、40000尾、50000尾,同时在养殖槽外池塘搭配放养规格为0.5kg/尾的鳙鱼、白鲢鱼种共1200kg。采用一次放足、捕大留小、分批上市的方式,经过7个多月的养殖,试验结果表明:4条养殖槽商品鲈鱼产量分别为9093kg、12699kg、15792kg、17289kg;鳙鱼、白鲢共产出1880kg;4条养殖槽利润分别为74548元、117304元、138722元、120644元;利润率分别为46%、54%、51%、36%。

Largemouth bass,Micropterus salmoides,was cultured in four engineering water re-circulating tanks for 7 months in the experiment.The pond area was 25×667 m2 and contained four tanks with 22 m long,5 m wide,and 2.5 m deep.20 000,30 000,40 000,and 50 000 fish of largemouth bass was stocked in four tanks,respectively.1200 kg bighead carp and silver carp with 0.5 kg of body weight per fish were also stocked in the remaining area of pond.All fish was sstocked at the same time and caught in batches based on the size.The results showed that the production of each tank was 9 093 kg,12 699 kg,15 792 kg,and 17 289 kg,respectively.The total production of bighead carp and silver carp was 1880 kg.The profit of each tank was 74548 yuan,117 304 yuan,138 722 yuan,and 120 644 yuan,respectively.The profit margin of each tank was 46%,54%,51%,and 36%,respectively.