摘要
为探索解决罗非鱼越冬问题，开展了利用循环水养殖系统进行暂养的试验研究。以具有代表性的吉富罗非鱼（ Orcochromis niloticus）为研究对象，设计并构建了一套室内罗非鱼循环水养殖系统，并对罗非鱼进行了为期30 d的养殖试验。整个养殖周期内，罗非鱼养殖系统环境稳定、水质稳定良好。结果显示，系统养殖负荷总量从1024．2 kg增长到2309．1kg，鱼体平均体重由（170．7±10．8） g增重至（385．5±7．5） g，养殖密度由（22．9±3．5） kg／m3增加到（51．5±4．2） kg／m3，存活率达99．8％，饵料系数1．35。水质检测结果显示，水体进水口总氨氮0．21～0．33 mg／L，去除率20．64％；亚硝酸盐氮0．067～0．13 mg／L，去除率13．82％；溶氧6．5～7．4 mg／L，pH8．15～8．65，水温23．9～24．7℃。研究表明，罗非鱼生长状况良好，系统中各水质参数符合养殖要求。循环水养殖系统用于罗非鱼冬季暂养具有一定的可行性。
In order to enrich the data of temporary rearing system in the real production of tilapia in winter, an experimental study on the use of the recirculating aquaculture system for the breeding of tilapia （ Orcochromis niloticus） was conducted.The recirculating aquaculture system was evaluated as culture environments for tilapia were reared in the system for 30 days.Throughout the experiment, water quality parameters were stable and remained within ranges suitable for tilapias.The experiment results showed that：the carrying capacity of the farming system increased from 1 024.2 kg to 2 309.1 kg.The average body weight increased from （170.7 ±10.8） g to （385.5 ±7.5） g, and the stocking density of the fish increased from （22.9 ±14.5） kg/m3 to （51.5 ±10.2） kg/m3 .The survival rate was 99.8%.The feed coefficient ratio was 1.35.Water quality test results showed：the contents of ammonia nitrogen from fish pond water inlet was 0.21-0.33 mg/L, with the removal rate of 20.64%;and nitrite content from fish pond water inlet was 0.067-0.21 mg/L, with the removal rate of 14.02%.Dissolved oxygen content was at the range of 6.5-7.4 mg/L, pH ranged from 8.15-8.65, and the range of water temperatures was 23.9-24.7 ℃.It indicated that tilapias grew well in the recirculating aquaculture system as a temporary rearing system during the winter season, and it is feasible for practical use. The water quality parameters in the system was in accordance with the requirements of aquaculture.
出处
《渔业现代化》
北大核心
2015年第4期15-19,共5页
Fishery Modernization
基金
国家科技支撑计划"淡水水产品保活鲜冷链物流关键技术研发(2012BAD38B04-3)"
关键词
冬季
罗非鱼
循环水养殖系统
暂养
winter
tilapia
recirculating aquaculture system
temporary rearing
