河漫滩生态系统不同限饲期网箱养殖恒河墨鱼的生产与经济

IF 0.6 Q4 FISHERIES Journal of Fisheries Pub Date : 2023-10-31 DOI:10.17017/j.fish.580
Jesmin Ara, Md. Akhtar Hossain, Md. Abu Sayed Jewel, Md. Ayenuddin Haque
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引用次数: 0

摘要

饲料成本高是影响河漫滩生态系统下恒河墨鱼(mystus cavasius)等营养丰富鱼类网箱养殖的主要问题。为解决这一问题,对查兰比勒阿特拉伊河不同限饲期下网箱养殖恒河鼠的产量和经济性进行了评价。在浮式网箱中进行4个限饲期试验,采用4种不同处理(每周T1-0天即常规饲养、T2-1天、T3-2天、T4-3天)。鱼每天喂两次含32%蛋白质的商业浮动颗粒。水质参数(水温、溶解氧、pH、氨氮)均在适宜养殖范围内。T1处理的末重、增重、%增重、平均日增重、特定生长率和成活率显著提高,T2处理的饲料系数显著提高。处理T2也显著提高了鱼产量和效益。本研究认为,以50尾m-3的放养密度饲喂含蛋白32%的饲料,维持1 d /周的限饲,在自来水网箱养殖中是经济可行的。
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Production and economics of Gangetic mystus (Mystus cavasius) farming under different feed restriction periods in cages of floodplain ecosystem
High feed cost is a major problem for the promotion of a nutrient rich fish like Gangetic mystus (Mystus cavasius) in cages under floodplain ecosystem. To address this problem, production and economics of cage farming of Gangetic mystus were evaluated under different feed restriction periods in Atrai River of Chalan Beel. Four feed restriction periods were tested in floating cages under four different treatments (T1-0 day i.e., regular feeding, T2-1 day, T3-2 days, and T4-3 days feed restriction per week). Fish were fed twice daily with commercial floating pellet containing 32% protein. Water quality parameters (water temperature, dissolved oxygen, pH and ammonia-nitrogen) were within the suitable range for fish culture. Final weight, weight gain, % weight gain, average daily gain, specific growth rate and survival rate were found significantly higher at treatment T1 whereas a better feed conversion ratio was observed in T2. Significantly higher fish production and benefit were also obtained from treatment T2. The present study concluded that Gangetic mystus with a stocking density of 50 fish m–3 fed with 32% protein containing feed maintaining 1 day feeding restriction per week are economically feasible for cage culture in running water.
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审稿时长
8 weeks
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