Fish Rearing Experiment in a Combined Intensive-extensive System (I.E.S.) for Complex Recovery of the Fishery Potential from Water Basins

Cecilia Bucur , Mioara Costache , Daniela Radu , Nino Marica , Mihail Costache , Carmen Georgeta Nicolae
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引用次数: 1

Abstract

In 2015, the researchers of the Fish Culture Research and DevelopmentStation of Nucet have experienced a combined intensive-extensive system (I.E.S.) for fish growing, that aimed a complex recovery of the fishery potential from water basins. Fish population in the extensive system (EC3 Nucet pond - 3.8 ha) was constituted from: carp (Cyprinus carpio) - 300 ex.; North American sturgeon - paddlefish (Polyodon spathula) - 125 ex.; Asian Ciprinidae: silver carp (Hypophthalmichthys molitrix) - 530 ex. and grass carp (Ctenopharyngodon idella) - 185 ex. The combined intensive-extensive system (I.E.S.) was located in the fish growing pond. The module is composed from 8 floating cages (6 x 6 x 2 m each one), module surface was 288 square meters and total volume / module was 576 cubic meters. Stocking density in the intensive system was 500 ex. carps 1 year old / floating cage (4000 ex./module). In the moment when the floating cages were stocked, the average weight of carps was 150 g/ex., resulting in a total quantity of 600 kg/module. Total production obtained was 3267 kg/module (3.803 ex.; 95% survival rate) on average 408 kg carp / floating cage, without any additional technological interventions. The fish were fed with floating feed (32% protein) and conversion rate (FCR) was 1.37%. The fish were clinically healthy,on the length of the entire experiment, and the quality of aquatic environment was within the rules of good practice for aquaculture.

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集约-粗放结合系统对流域渔业潜力复杂恢复的养鱼试验
2015年,Nucet鱼类养殖研究与发展站的研究人员体验了一种集约-粗放结合的鱼类养殖系统(I.E.S.),旨在从流域中恢复渔业潜力。广泛系统(EC3核池- 3.8公顷)的鱼类种群由:鲤鱼(Cyprinus carpio) - 300头;北美鲟鱼-白鲟(Polyodon spathula) - 125例;亚洲鲤科:鲢鱼(Hypophthalmichthys molitrix) - 530例,草鱼(Ctenopharyngodon idella) - 185例。集约-粗放组合系统位于养鱼池内。模块由8个浮动网箱组成,每个网箱6 × 6 × 2m,模块表面积288平方米,总容积576立方米。集约化系统的放养密度为500条1岁鲤鱼/浮式网箱(4000条/模组)。在浮式网箱放养时,鲤鱼平均体重为150 g/ex。,因此每个模块的总重量为600公斤。获得的总产量为3267公斤/模块(3.803 ex.;95%存活率),平均408公斤/浮式网箱,无需任何额外的技术干预。投喂蛋白质含量为32%的浮动饲料,蛋白质转化率为1.37%。在整个试验期间,鱼临床健康,水生环境质量符合水产养殖良好规范的规定。
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