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斑点叉尾(?)原产于美国.上世纪80年代引进我国饲养,通过驯养后由肉食性转为杂食性。该鱼含肉率高,营养丰富,又无肌间刺,适宜加工,是出口欧美国家的首选水产品,适宜水库养殖。我省大中型水库众多, 水库库区拥有得天独厚的自然资源,水面大、水质好、无污染,发展斑点叉尾(?)水产养殖潜力很大。沅陵县五强溪水库等库区已经大规模地开展斑点叉尾(?)养殖, 取得了较好的经济效益。下面介绍斑点叉尾(?)水库网箱养殖技术,以供参考: 相似文献
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<正>斑点叉尾鲴原产于美国,20世纪80年代引进我国饲养,获得成功。经过多年的研究及推广养殖,现在斑点叉尾鲴已经推广到我国的大部分地区,成为池塘和网箱养殖的优良品种。而水库养殖的鲴品质比池塘养殖的要好,因此安徽省庐江县的许多水库都已开展网箱养鲴,所产的鲴大部分被加工成鲴鱼片出口欧美。现将水库网 相似文献
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在燕山水库开展了使用较大规格的网箱养殖斑点叉尾鮰试验,通过养殖水域的合理选择,饵料科学投喂,有效的鱼类疾病预防治疗和日常管理等方法,经过8个月的饲养,斑点叉尾鮰平均出箱规格为764g,成活率为90.1%,纯收入为293 464元,投资回报率为:61.02%。 相似文献
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斑点叉尾鱼回又称沟鲶、河鲶、美洲鲶。由于这种鱼具有适应性强、生长快、易饲养、易起捕以及肉质鲜美等优点,因而成为世界闻名的养殖品种和游钓的对象。它适合于我国绝大部分地区养殖,是一种具有发展前景的优良养殖鱼类。利用水库养殖可提高水库水体生产效率,实现高密度、集约化养殖,但养殖实践中应把握以下几关。一、选址关斑点叉尾鱼回是温水性淡水鱼类,适温范围0~38℃,最适生长温度为21~26℃,在水温低于10℃时,基本停止摄食和生长。在纯淡水中生长良好,在盐度为1.4%的水中仍能生活。所以,适宜于网箱养殖的水库,必须水温常年在0~38℃… 相似文献
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针对我县现有淡水养殖业结构,引进和推广淡水优良品种斑点叉尾鮰养殖,可以充分利用和开发大水面淡水资源的潜力,提高大水面淡水资源利用率,促进淡水养殖业增效,农民增收,为我县淡水养殖业快速可持续发展提供一条良好的途径。本文根据我县区位和淡水优势,结合斑点叉尾鮰生物特性,对其养殖技术进行总结。 相似文献
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水库网箱养殖斑点叉尾鮰试验 总被引:3,自引:0,他引:3
8口养殖网箱,规格为5 m×4 m×3 m,投放斑点叉尾鮰鱼种21 600尾,养殖20个月,总成活率91.3%,饲料系数1.81,平均体重817 g;销售收入16.1万元,利润2.9万元,投入产出比为1∶1.22。 相似文献
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2004年2月至2005年12月我们在安徽凤台县刘集乡西淝河河套开展了斑点叉尾鮰网箱规模养殖试验,取得了较好的经济效益,现将其养殖技术总结如下: 相似文献
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Fingerling channel catfish (Ictalurus punctatus) were fed purified diets containing varying levels of manganese for 13 weeks in two experiments. Weight gain and feed efficiency data of catfish fed the basal diet (2.4 mg Mn/kg diet) were not significantly different from those of catfish fed manganese-supplemented diets in both experiments. Liver manganese superoxide dismutase activity, liver manganese concentration, serum alkaline phosphatase activity and hexosamine content of gill filament cartilage did not differ in catfish fed basal and manganese-supplemented diets. Bone manganese concentration increased almost linearly with increasing dietary manganese levels. The 2.4 mg Mn/kg supplied by the basal diet was apparently sufficient to meet the manganese requirement of fingerling channel catfish during these experiments. 相似文献
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沟鲶体长/体高为3.70~5.20,体长/头长3.10~4.00,头长/吻长2.51~3.02,头长/眼径9.30~11.1,头长/鼻间距8.50~9.80。躯干后端着生有一脂鳍。属有胃肉食性鱼,但经人工驯养可转变为以植物性饲料为主。血液中红细胞2.16×106个/mm3,白细胞6 900个/mm3。肌肉中粗蛋白质量分数15.76%,粗脂肪质量分数8.66%,水分质量分数74.56%,铁1.76 mg/kg,锌0.366 mg/kg。人体必需的氨基酸含量丰富,种类齐全。 相似文献
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为研究斑点叉尾(鱼回)呼肠孤病毒(CCRV)诱导斑点叉尾(鱼回)肾脏细胞(CCK)发生凋亡的机理,以CCRV感染的CCK细胞为实验材料,采用Hoechst 33258染色、DNA片段化检测、TUNEL反应、亚G1期细胞检测以及线粒体膜电位变化检测等方法进行实验.感染试验结果显示,病毒感染斑点叉尾(鱼回)肾脏组织细胞后,细胞变圆、皱缩,随后细胞脱落,细胞单层呈网状,感染72 h后出现典型细胞病变效应(CPE);病毒感染48 h后Hoechst 33258染色结果显示,细胞的染色质固缩、核边缘化或破裂,可观察到凋亡小体,细胞凋亡率随时间增加;DNA片段化检测结果显示,病毒感染细胞12 h后细胞基因组DNA出现片段化,随后逐渐增强,72 h达到最高;TUNEL反应结果表明,病毒感染细胞72 h后细胞基因组DNA断裂,有大量游离3’末端自由羟基(-OH)存在.亚G1期细胞检测结果显示,病毒感染48 h后,约53.44%细胞处于亚G1期;利用JC-1检测试剂盒检测病毒感染细胞的线粒体膜电位变化,病毒感染细胞24 h后线粒体膜通透性发生改变,膜电位变化显著.紫外线灭活与热灭活的斑点叉尾(鱼回)呼肠孤病毒不能诱导斑点叉尾(鱼回)肾脏细胞发生凋亡,表明细胞凋亡依赖于病毒复制. 相似文献
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Past beneficiaries of research and extension projects in aquaculture in the USA have been large farmers using pond culture systems. Additional studies, based on sound knowledge of empirical behaviour, are needed to identify alternative technologies and aid in the management decisions of small-scale farms. A mixed integer, multiperiod linear programming model and survey data were used to analyse the profitability of caged channel catfish, Ictalurus punctatus (Rafinesque), culture. Results suggest that only a limited number of farmers may be able to adopt cage culture as an alternative farm enterprise. Profitability was sensitive to assumed product prices. 相似文献
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Production type diets were developed to support tank reared channel catfish, Ictalurus punctatus, until they were large enough to accept conventional pelleted feeds. Alternative ingredients to fishmeal were evaluated through a series of feeding trials using diets formulated by computer. Several animal and vegetable protein concentrates partially replaced fishmeal without significant reductions in growth or changes in carcass composition. Ingredients which supported especially good growth of fish included fish, poultry by-product, soybean and cottonseed meals; brewers yeast; wheat grain and beef tallow. Ingredients previously thought to be essential or included in the past for their “unidentified growth factors” were apparently not necessary when balanced diets were manufactured under proper quality control. No diet was found superior to that composed of fishmeal, wheat, tallow and a micronutrient premix preserved with antioxidants and propionic acid. 相似文献