向0.04公顷的养殖池塘中供以循环水,作为一种提高斑点叉尾鮰(IctalurusPunctatus)产量的手段而在三项研究中被测试。研究中用离心泵以227升/分的速率将水从深处打入池塘的浅端,在其中两项实验中水将通过一个1000~4升的生物过滤器。每项研究中,45g的小鱼被放养,在生长季节养殖175天,使之长到大于450kg的商品规格的成鱼。 实验1、放养密度每公顷分别为7,410尾 Circulating water to 0.04 hectares of aquaculture ponds was tested in three studies as a means of increasing the yield of Channel catfish (Ictalurus Punctatus). In the study, water was pumped into the shallow end of the pond at a rate of 227 l / min using a centrifugal pump, and in two of these experiments the water was passed through a 1000-4 liter biofilter. In each study, 45 g of small fish were stocked and raised for 175 days in the growing season to grow into adult fish sizes greater than 450 kg. In experiment 1, stocking density was 7,410 ha each