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<正> 最近几年,许多学者对网箱养鱼技术进行了广泛深入的研究,取得了不少研究成果,而对于网箱养鱼的规模,即一个水库中的箱养鱼面积和整个水库面积之比则研究得较少。故本文拟从我省东武仕水库的网箱养鱼实践来探讨一下水库网箱养鱼的合理规模。 1 网箱养鱼概况 相似文献
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本文根据网箱养鱼的条件,结合多年实践的经验教训,对网箱养鱼的规模在网箱养鱼中的重要性及其确定的原则进行了分析提出了网箱养鱼规模与水源条件、经济实力,社会总体供求的关系,同时对网箱养鱼发展方向进行了初步探索。 相似文献
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近十多年来,我国一些网箱养殖水域出现了水体富营养化问题,阻碍了网箱养鱼的健康发展。但网箱养鱼出现的水环境污染问题,绝非网箱养鱼自身固有属性的必然反映,而是网箱养鱼技术偏离了生态学基本原理的结果。如果因水制宜地应用生态学基本原理和现代水产科技成果,实施具有生态环保功能的网箱养鱼技术,使网箱养鱼成为优化水域生态系统、提高水域生物生产力和改善水环境的措施,必将促进网箱养鱼持续发展。 相似文献
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通过对网箱养鱼前后洋河水库不同区域总氮、总磷和化学耗氧量的监测,发现农业出水口位置的网箱养鱼并未对该区域水质造成影响,从而为农业出口位置的网箱养鱼提供了水环境依据,同时分析了网箱养鱼不影响该区域水质的原因和造成洋河水库富营养化的真正原因 相似文献
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我国网箱养鱼技术发展现状 总被引:1,自引:0,他引:1
本文作者围绕网箱养鱼起源和概述、现代网箱养鱼技术试验阶段、推广阶段和发展特点以及深度发展相展望等四个专题,回顾国内外网箱养鱼的历史,进行全面论述网箱养鱼技术的现状及其发展趋势。作者最后论述了网箱养鱼在我国水产养殖业的生产结构中的作用与地位。 相似文献
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<正> 网箱养鱼在我国的发展有近十年的历史。目前全国不少省市都开展了网箱养鱼,尤其是利用水域天然饵料培育鱼种,普遍认为是行之有效的方法。然而,我国网箱养鱼经历时间短,这种新的养殖工艺在各地发展还不平衡,养鱼效果相距也较大,其中部分原因就是网箱设置地点的差异引起的。几年来的网箱养鱼实践证明,在不投饵的情况下,并非所有的水域都能进行网箱养鱼。笔者据自己网箱养鱼的实践,及生产、科研单位的资料,以数据和实例,对大中型天然水域网箱养鱼的地点选择,所应注意的几个 相似文献
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本文作者围绕网箱养鱼起源和概述,现代网箱养鱼技杏试验阶段,推广阶段和发展特点以及深度发展和展望等,四个专题,回顾国内外网箱养鱼的历史,进行全面论述网箱养鱼技术的现状及其发展趋势。作者最后论述了网箱养鱼在我国水产养殖业的生产结构中的作用与地位。 相似文献
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随着江河网箱养鱼的迅速发展,一些泉水资源丰富的地区也纷纷在泉水水域开展网箱养鱼。笔者在2年的调查中发现,泉水网箱养鱼无论是在防洪防逃,鱼病防治等各方面均优越于江河网箱养鱼。因此,有必要总结泉水网箱养鱼的经验,对今后推广泉水网箱养鱼具有一定意义。 相似文献
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网箱养鱼是鱼类精养方法之一。近年来,各国对网箱养鱼的兴趣日益高涨,但网箱养鱼的发展也面临着一系列的困难,首先是由于水质恶化、生化需氧量升高和缺氧造成的许多困难。为了大规模开展网箱养鱼,必须研究各国从事网箱养鱼的经验。下面简单介绍一下美国在这方面的一些成就。 相似文献
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投饵网箱养鱼促进温杖子水库渔业高速增产的生态经济效益分析 总被引:2,自引:0,他引:2
温杖子水库按养鱼水面单位面积承受2200kg/ha网箱鱼的负载量设置网箱,建立以网箱养鱼为重要环节的水库新型渔业生产结构体系。三年中,水库水面鱼产量(含网箱鱼产量)由145.5kg/ha上升到266.71kg/ha,年总产量增长18.3倍;渔业投入资金年利润率达71.9%;网箱养鱼的投入总能量转换效率提高了6.03-6.36%。合理开发和保护了水库渔业资源,促进了温杖子水库渔业的高速增产。 相似文献
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Fisheries and cage culture of three reservoirs in west Java, Indonesia; a case study of ambitious development and resulting interactions 总被引:1,自引:0,他引:1
N. W. ABERY F. SUKADI A. A. BUDHIMAN E. S. KARTAMIHARDJA S. KOESHENDRAJANA BUDDHIMAN & S. S. DE SILVA 《Fisheries Management and Ecology》2005,12(5):315-330
Abstract The interactions between cage culture and wild fishery activities in three Indonesian reservoirs, Saguling, Cirata and Jatiluhur, of the greater Ciratum watershed, West Java, were evaluated using historical data and interviews with cage culture operators. In all three reservoirs, cage culture of common carp, Cyprinus carpio L., and later of common carp and Nile tilapia, Oreochromis niloticus (L.), were encouraged as an alternative livelihood for persons displaced by the impoundment. Currently, a two‐net culture system, locally known as ‘lapis dua’, in which in the inner cage (7 × 7 × 3 m) is used for common carp culture and the outer cage (7 × 7 × 5/7 m) is stocked with Nile tilapia, is practised. On average each cage is stocked with approximately 100 kg fingerlings each of common carp and Nile tilapia. The numbers of cages and production of cultured fish has increased in the reservoirs, but total and per cage production began to decline from about 1995 in Saguling from 2200 kg cage?1 in 1989 to <500 kg cage?1 in 2002, and in Cirata from a peak of approximately 2300 kg cage?1 in 1995 to approximately 400 kg cage?1 in 2002. In Jatiluhur, which has a considerably lower cage density, total fish production and production per cage has increased since 2000, and currently is approximately 4000 kg cage?1, close to production in the early years of cage culture activities. The cage culture operations also resulted in substantial nutrient loading, estimated at 3.2, 15.2 and 3.1 t of nitrogen and 134, 636 and 128 kg of phosphorous per year in the maximum years of production for Saguling, Cirata and Jatiluhur reservoirs, respectively. In later years, when cage culture production was high, fish kills occurred in the cages, and in Jatiluhur reservoir coincided with a dramatic decline in wild fishery catches. An attempt is made to determine the maximum number of cages for each of the reservoirs that will bring long‐term sustainability of cage culture operations and the wild fisheries in the three reservoirs. 相似文献
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2005年6月至2006年4月对长江三峡库区投饵网箱养殖区上游、网箱养殖区以及网箱养殖区下游底泥中有机物耗氧量、TN、NO3-N、TP、硫化物等指标进行了监测。结果显示,网箱养殖区及网箱下游底泥有机物耗氧量和总磷含量分别高出对照区5.4~6.5 mg/g和0.03~0.08 g/kg,网箱养殖区及网箱下游底泥总氮含量及硝态氮含量分别高出对照区40~80 mg/kg和0.8~1.2 mg/kg,网箱养殖区及网箱下游底层水的硫化物含量平均值分别高出对照区1.3 mg/L和0.11 mg/L。 相似文献
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雪野水库网箱养鳜鱼试验 总被引:2,自引:0,他引:2
1997年7 ̄10月在莱芜市雪野水库设置27只网箱,进行鳜鱼养殖试验。总产鱼12959.3kg,平均尾重1.2kg,商品率86.5%,平均单产19.2kg/m^2,最高单产23kg/m^2,投入产出比为1:2.57。试验认为,饵料鱼规格应控制在鳜鱼体长的40% ̄55%,在网箱中设置隐蔽物,采用饱食投喂法,可以提高成活率,降低饵料系数。 相似文献
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团头鲂水库网箱养殖试验 总被引:1,自引:0,他引:1
在网箱中进行团头鲂(Megalobrama amblyocephala)鱼种,成鱼养殖,鱼种箱平均产量470kg,平均尾重81.5g,个体净增重12.19倍,平均饲料系数2.22,成鱼箱平均产量828.65kg,平均尾重435g,个体净增重7.53倍,平均饲料系数2.25。 相似文献
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2008年4月~10月,在福建尤溪水东水库开展奥尼罗非鱼水库网箱集约化养殖试验,结果表明:投放平均体重为27g的奥尼雄性罗非鱼,经过190d的饲养,鱼体平均体重1062g,产品符合水产品质量安全要求,平均成活率达98.0%,饲料系数为1.7,平均盈利244元/m^2,创造了良好的经济效益。本文从水源条件、养殖设施、养殖密度、饲料和饲养管理等方面,总结了福建尤溪水东水库罗非鱼网箱健康养殖的技术要点,为福建溪流型水库开展罗非鱼网箱健康养殖提供参考。 相似文献
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B. A. Ingram G. J. Gooley L. J. McKinnon S. S. de Silva 《Fisheries Management and Ecology》2000,7(1-2):33-43
The concept of integrating aquaculture with irrigated farming systems was evaluated in three projects in the GoulburnMurray Irrigation District (GMID) in south-eastern Australia. (1) Semi-intensive cage culture trials using silver perch, Bidyanus bidyanus (Mitchell), were undertaken in a range of irrigated farming systems: irrigation supply channels; groundwater supplies; and on-farm storage dams. Survival and growth of fish under these conditions were comparable to fish reared in conventional aquaculture ponds. However, poor water quality at some sites reduced survival and growth. (2) A study was undertaken to assess the feasibility of the cage culture of silver perch and rainbow trout, Oncorhynchus mykiss (Walbaum), in three irrigation water storage reservoirs. Conditions within each reservoir, particularly water quality, wind and wave action, and cage fouling, varied considerably, and influenced fish growth and survival. (3) Mariculture trials were undertaken in two saline groundwater evaporation basins, which were part of an integrated agriforestry and salt reclamation system. The species tested included two oyster, two prawn and nine fish species. Some species exhibited exceptional survival and growth rates under trial conditions. These projects indicate that the concept of integrating aquaculture with existing irrigated farming systems has the potential to enhance productivity, water use efficiency and overall environmental sustainability in the GMID. 相似文献
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2009年9月至2010年9月,先后7次定点采集水样,定性、定量测定广西西津水库莲塘库区浮游植物,分析其群落结构、优势属、生物量及水平分布等参数的季节性变化。莲塘库区共有浮游植物8门62属,其中绿藻门属数最多,蓝藻门次之,第三为硅藻门,分别占总属数的40.32%、20.96%和19.35%;浮游植物属数生物量表现为夏、秋季节多,冬、春季节少。鱼类网箱养殖区的浮游植物生物量高于非养殖区。Shannnon-Wiener多样性及均匀度指数分别介于1.68~2.03和0.314~0.362之间。结合优势属和多样性指数评价水质,西津水库莲塘库区水质已达到富营养化水平。 相似文献