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鱼种箱平均产量18.81kg/m^2，平均尾重81.5g,个体净增重15．3倍，平均饮料系数2．22，成鱼箱平均产量33.1kg/m^2,平均尾重435g，个体净增重7．93倍，平均饮料系数2．25。 相似文献
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黑龙滩水库网箱养草鱼高产试验 总被引：1，自引：0，他引：1
采用２５ｍ＾２网箱３个，每平方米放养平均体重３９．７ｇ的草鱼种１５５尾，投喂配合饲料，当年总产成鱼１２５７ｋｇ，每平方米净产量１６１．５ｋｇ。出箱平均个体重１１３８．５ｇ，在率９５．０８％，群体增重２６．３倍，个体平均增重２７．７倍，饲料系数２．１６。本文还对高产技术因子进行了探讨。 相似文献
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选配3组虹鳟鱼种饲料配方。通过网箱养殖进行了对比试验，结果表明：1^#配方饲料与2^#、3^#配方饲料有显著差异。2^#、3^#配方饲料差异不显著；1^#配方饲料含粗蛋白37．0％、粗脂肪22．3％、可消化能1．76MJ／kg，饲养鱼种平均成活率为96．85％。鱼种平均尾重167．2g，总增重931．2kg、增重12．67倍，饲料系数为1．29。建议生产上使用1^#配方饲料。 相似文献
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1995年，在1口面积5802．9m^2成鱼塘设置1口25m^2的网箱养湘鲫，经136天饲养，由平均150g／尾长到670g／尾，增重3．47倍，日尾均增重3．82g箱产湘鲫334．33kg，净产259．33kg；每m^2产量13．37kg，净产10．37kg。箱鱼总产值4849．02元，盈利1．949．49元，投产比1:1．67。 相似文献
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利用2只5m×5m×2.5m无结节PE封闭式网箱,投放平均尾重0.24g、全长70～100mm翘嘴红鲌苗种计1.1万尾,放养密度为220尾/m2;经304d饲养,平均尾重达到200g,最大个体350g;群体净增重43.98倍,饲料系数1.51,成活率92%,净增产1979kg,利润801.60元/m2,投入与产出之为12.94. 相似文献
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利用2只5 m×5 m×2.5 m无结节PE封闭式网箱,投放平均尾重0.24 g、全长70~100 mm翘嘴红鱼白苗种计1.1万尾,放养密度为220尾/m2;经304 d饲养,平均尾重达到200 g,最大个体350 g;群体净增重43.98倍,饲料系数1.51,成活率92%,净增产1 979 kg,利润801.60元/m2,投入与产出之为1∶2.94。 相似文献
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池塘网箱养鱼的可行性及技术研究 总被引：1，自引：0，他引：1
１９９５、１９９６年在精养成鱼塘设置网箱养殖商品湘鲫与乌鳢鱼种，采取灌排水形成微流、启动增氧机、投放耐低氧吃食性鱼类、投喂颗粒馈料和动物肉、勤刷钢箱养措施，结果：湘鲫养殖１３６天，从１５０ｇ长到６７０ｇ，平均日增重３．８２ｇ，２５ｍ＾２的网箱产成鱼３３４．３３ｋｇ。平均１３．３ｋｇ／ｍ＾２，成活率９９．８％，乌鳢种培育４２天，由体长１ｃｍ到１０ｃｍ，平均日增长２．１４ｍｍ，２０ｍ＾２的网箱，共育鱼 相似文献
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0.4hm2池塘放养规格为5.0cm的土鲶(Silurus asotus)夏花鱼苗,密度4.5万尾/hm2。经92d饲养,平均规格405g;产量11 846.25kg/hm2;饵料系数3.50;利润8.0万元;投入产出比1∶2.47;出塘率65.0%。 相似文献
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The effects of different stocking rates and ratios of Tilapia aurea (Steindachner) in combination with Cichlasoma managuense (Günther) on tilapia recruitment and production were evaluated in 440 m2 ponds. The research was conducted at the National Fisheries Station in El Salvador, Central America.The tilapia AT value, the total weight of marketable tilapia (14 cm or larger) expressed as a percentage of the total weight of the whole tilapia population, averaged 96 or greater at a stocking ratio of 4:1 (fingerling tilapia: fingerling C. managuense) and at a stocking ratio of 8:1 (fingerling tilapia: adult C. managuense). Tilapia AT values at a stocking ratio of 8:1 (fingerling tilapia: fingerling C. managuense) ranged from 71–89.Highest estimated annual production of marketable tilapia (3611 kg ha?1) occurred at the highest stocking rate of 12000 tilapia ha?1 in populations with an average tilapia AT value of 98. Greatest weight gain of marketable tilapia (167 g of 1.17 g day?1) occurred at the lowest stocking rate of 6000 tilapia ha?1 in populations with an average tilapia AT value of 99.Estimated annual production of marketable C. managuense ranged from 212–414 kg ha?1. The average weight gain of marketable fish varied from 48–60 g (0.32–0.40 g day?1). The average C. managuense, AT value was 54, ranging from 29–84.The estimated production of marketable fish of both species at stocking rates of 6000, 9000 and 12000 tilapia ha?1 in populations with tilapia AT values of 96 or greater averaged 3295, 3290 and 4025 kg ha?1 per year, respectively. 相似文献
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莱州湾脉红螺筏式养殖的初步研究 总被引：3，自引：0，他引：3
１９９４年１２月放养平均壳高３．９ｃｍ，平均体重１０ｇ的脉红螺苗４万个，经过１３个月海上筏式养殖，平均壳高达７．４３ｃｍ，平均体重８３．５ｇ，亩产达到２７２０ｋｇ，总成活率９４．４％，亩纯收入３５４５０．９０元，约是扇贝养殖的４倍。放养密度以１０个／层产量最高，贻贝为最佳饵料品种。应加强４￣１０月脉红螺快速生长期的管理，专家鉴定认为，本研究居国内领先水平。 相似文献
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在国内首次进行了蓝点马鲛网箱养殖试验。对网箱结构,苗种兼捕,苗种放养,饵料投喂,鱼病防治等整套技术进行了研究。７２ｍ＾２网箱共养养成商品鱼１５５１尾,成活率５５％,平均尾重５８０ｇ,饵料系数７．２,单位面积产量１２．５ｋｇ／ｍ＾２。专家鉴定认为,本研究填补了国内空白,达国内领先水平。 相似文献
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《Journal Of Applied Aquaculture》2013,25(3-4):73-82
Abstract Rainbow trout, Oncorhynchus mykiss, were raised in culture cages (1 m3) to determine the effect of stocking density on growth, survival, and percentage of market-size fish. Large fingerling rainbow trout (20-25 cm, 232 g average weight) were stocked into six cages located in a 0.4-ha pond. Two stocking densities (100 or 200 fish/cage) were used, and fish were grown for 140 days (2000-April 2001). Average total harvest weight (35.0 kg) in the low-density cages was approximately one-half the average total harvest weight (61.2 kg) in the high-density cages. Average weight gain (11.7 kg to 15.1 kg) and feed conversion (1.2 to 1.5) were also smaller for the low-density cages. Average survival was 96.7% for the low-density cages and 94.2% for the high-density cages, with the percentage of market-size fish (< 29 cm) averaging 50.3% and 52.0%, respectively. Production costs for the actual experiment and the revenues from fish sold at the end of the study were collected. An enterprise budget based on the experimental results for the two densities was developed to determine if a culture operation of this size would produce a net return. Production costs and revenues from the experiment resulted in a large negative return (-$3,124) and high breakeven price ($13.53/kg). 相似文献
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池塘面积1067m^3，主养彭泽鲫鱼种，搭配团头鲂及鲢鳙鱼种，经156天饲养，共产鱼1029．6kg，折合667m^2产鱼643．5kg。其中每667m^2产彭泽鲫鱼种367．8kg,平均规格70g。每667m^2利润3498元。投入产出比为1：1．67。 相似文献