共查询到20条相似文献，搜索用时 250 毫秒
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细鳞鲳是新型的大型淡水经济养殖品种,具有极高的食用与商业价值,了解并掌握细鳞鲳的常见养殖病害及其防治技术,将对开展其大规模人工养殖起到重要作用. 相似文献
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为了推广细鳞鲳高产养殖新模式，进一步提高经济效益，我们于２０００年在青山水库进行了网箱养殖细鳞鲳高产试验。试验结果：网箱养殖面积２００米２，净产量达１１４４１公斤，每平方米净产量５７．２公斤，成活率９５％，饲料系数１．５６。每平方米产值７４１元，利润４１０元，投入产出比为１∶２．２５，取得了良好的经济效益。现将细鳞鲳网箱养殖高产技术总结如下。一、网箱结构和设置网箱材料因考虑到细鳞鲳有锋利的牙齿易咬破聚乙烯网片，不宜使用聚乙烯网箱，金属网箱一则笨重，二则造价高。从经济实用角度考虑，硬质塑料网箱是养… 相似文献
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细鳞鲳，又名细鳞巨脂鲤，原产于巴西南部的巴拉那河与巴拉圭河水系，于１９９６年引进我国。该鱼适应性强、食性杂、生长快、抗病能力强，肉质鲜美，并且外形美观、体色鲜艳，是一种食用兼观赏的经济鱼类。为了推广这一新品种，探索细鳞鲳高产养殖新模式，进一步提高经济效益，我们于２０００年在青山水库进行了网箱养殖细鳞鲳高产试验。试验结果：网箱养殖面积２００ｍ～２，净产量达 １１４４１ｋｇ，成活率９５％，饲料系数１．５６。每平方米产值７４１元，利润４１０元，投入产出比为１：２．２５，取得了良好的经济效益。现将细鳞鲳… 相似文献
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由浙江省淡水水产研究所于１９９６年３月３日国内首家引进细鳞鲳后，经三年多精心培育，已于１９９９年７月进行人工繁殖获得成功。并在１９９９年７月２８日通过了浙江省科委和省水产局主持的验收，共获下塘鱼苗１０万尾。细鳞鲳，中文学名为细鳞肥脂鲤，拉丁名为Ｐｉａ... 相似文献
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<正> 淡水鲳(Colossoma sp.)原产南美洲亚马逊河,是当地的重要渔捞对象。体型侧扁,背高肉厚,鳞细,鳍红,尾黑,体表有黑色花斑,是一种极美的观赏鱼类(见照片)。近年来,己被发现是一种生长快,食性杂,抗病害,耐低氧,肉质鲜的优良养殖对象。但目前国内刚开始养殖,对其研究也刚刚起步。我所于1985年引进淡水鲳鱼种,为了弄清淡水鲳的生长和养殖特性,作者就淡水鲳的生长速度,水质条件,饵料要求在室内可控水体中进行了初步试验,并与尼罗罗非鱼进行了对照。旨在获得科学的依据,为推广养殖淡水鲳提供参考。 相似文献
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细鳞鲳，学名细鳞肥脂鲤（Piaractusmesopotami－cus），在巴西被称为Pacu。原产于巴西南部的巴拉那河与巴拉圭河水系。为巴西国内的主要淡水鱼类之一，生长快，产量高，食性杂，易饲养，易捕捞，抗病力强，比淡水白鲳耐低温，肉味鲜美。２０００年我们进行了细鳞鲳池塘高产养殖试验，现就试验结果报告如下。一、材料与方法１．池塘条件试验塘面积１亩，平均水深１．２米。水源来自苕溪水，pH值为６．５～８．５，水质清新无污染。鱼种放养前半个月排干水，用７５千克生石灰彻底清塘。试验池配备０．７５千瓦的水车式增氧机一台，电缆线用… 相似文献
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对细鳞鲳成鱼肌肉中的水分、蛋白质、脂肪、灰分含量和氨基酸、脂肪酸组成及含量进行了分析，结果表明：细鳞鲳肌肉蛋白质和脂肪含量均较高，分别为19．54％6.22％。肌肉中含有18种氨基酸，氨基酸总量为73．72％；脂肪酸含有15种，其中高度不饱和脂肪酸含量为15．54％。 相似文献
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布氏鲳骖（Trarchinotus blorhii）又名蛳鼻鲳骖、金鲳，属鲈形目、鲈亚目、够科、鲳骖属？布氏鲳鸥具有肉质细嫩、细刺少、适应性强、生长速度快、抗病能力强等特点，是一种易于圈养、经济效益很高的养殖晶种，为丰富福州市海水养殖鱼类品种并提高池塘综合经济效益，2001～2004年我们在福建省连江县大官坂垦区开展蟹池内网箱套养布氏鲳终的试验生产，现将其技术要点归纳如下。 相似文献
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Pablo Emilio Cruz‐Casallas Víctor Mauricio Medina‐Robles Yohana María Velasco‐Santamaría 《Aquaculture Research》2011,42(6):823-831
In Colombia and the rest of the world, the decrease in capture fisheries production has turned the aquaculture into an alternative source of protein for the populations food security as well as an important productive activity, generating employment and income for the rural communities. The Colombian pisciculture is based on red Tilapia Oreochromis sp. (Linnaeus), Rainbow trout Oncorhynchus mykiss (Walbaum) and cachama blanca Piaractus brachypomus (Cuvier), which currently represent around 96% of the total national production. The remaining 4% comes from other farmed species such as bocachico Prochilodus magdalenae (Steindachner), carp Cyprinus carpio (Linnaeus) and yamúBrycon amazonicus (Spix & Agassiz). From the three main fish species, cachama blanca is the only native species, which has shown excellent performance in pond farming due to its rusticity, omnivorous habits, docility, meat quality, food conversion and disease resistance. The limited offer of Colombian fish farmed species determines its currently low competitiveness and restricted impact on the international markets; thus making necessary to explore the potential of new fish species in order to introduce them to the pisciculture system and to expand the range of fish farming species. A good alternative is the introduction of native catfish, which have great potential for fish farming activity. 相似文献
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一些养殖水体富营养化,导致养殖效益下降。分析了养殖水体富营养化的成因及危害,针对养殖水体富营养化提出一些防治措施,包括物理、化学、生物以及其他防治办法等。 相似文献
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The current status of the farming of Macrobrachium species in China is presented, including the scale of production and with an emphasis on its farming technology. The problems faced and research needed for the further development of freshwater prawn farming of China is also reviewed. Finally, this paper discusses the prospects and future expansion in this sector of national aquaculture. 相似文献
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Ahmed M. Elhendy Abdulaziz A. Alzoom 《Aquaculture Economics & Management (Blackwell Science)》2013,17(3-4):229-238
Abstract Because Saudi Arabia is a substantial importer of fish and its capture fishery is operating beyond maximum sustainable limits, it has a special interest in developing fish farming. It has been encouraging tilapia production. This study examines the costs of tilapia farming in the Central Region of Saudi Arabia using cross sectional data from 23 intensive fish farms. It provides information about the relative importance of different cost items such as variable costs and feed costs in total costs. Also, cost functions are estimated by ordinary least squares and a cubic cost function is found to provide the best fit to the available data. Minimum average cost of production occurs for 201 tonnes of tilapia per year per farm and profit is maximised for a production of 300 tonnes annually per farm. All farms operate at less than profit‐maximising scale and most operate at less than minimum efficient scale. The reasons could be low quality fry, low levels of management expertise in culturing tilapia and the secondary nature of tilapia farming. Lack of water is likely to limit future expansion of tilapia farming in Saudi Arabia. 相似文献
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Ventura Arlene Sobrinho de Castro Silva Tarcila Sousa Zanon Ricardo Basso Inoue Luis Antonio Kioshi Aoki Cardoso Claudia Andrea Lima 《International Aquatic Research》2019,11(1):1-12
International Aquatic Research - The goal of the study was to evaluate Lippia sidoides essential oil as an anesthetic for the tropical fish pacu Piaractus mesopotamicus. The physiological and... 相似文献
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Spatial and temporal variations of sediment quality in and around fish cage farms: A case study of aquaculture in the Seto Inland Sea, Japan 总被引：1，自引：1，他引：1
Vaishali Pawar Osamu Matsuda Tamiji Yamamoto Toshiya Hashimoto and Narasimmalu Rajendran 《Fisheries Science》2001,67(4):619-627
ABSTRACT: Fish cage farming generates large amounts of organic waste in the form of unconsumed feed and fecal matter, resulting in sediment deterioration and a threat to its own sustainability. Field studies analysed the scale of the impact of fish cage farming on sediment quality, variability of impact and spread of sediment enrichment in the vicinity of a fish farm. Two fish culture sites near the Fukuyama area of the Seto Inland Sea of Japan were chosen for the study. There was a significant difference between the quality of the sediment in aquaculture and non-aquaculture areas. The sediment underlying the fish cage farms was found to be extremely reducing, acidic and sulfidic. Sediment ignition loss did not vary markedly with the season. However, the redox potential and acid volatile sulfide content of aquaculture areas did show some seasonal variation. Sediment encircling a 165 m radius from the center of a farm in Yokota was judged as organically enriched by fish farming. A variation in sediment quality within the two sites and also within the stations was observed. Based on sediment quality, the stations could be categorized as less affected, highly affected or moderately affected. 相似文献
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Because of the influence of an intertidal farming environment, the oyster breeding industry of Chiayi and Yunlin has adopted the use of a horizontal rack culture in the intertidal zone, as well as a raft-string culture, to increase oyster production. This study used the translog cost function to analyze and compare the horizontal rack culture and horizontal rack culture coupled with the raft-string culture, referred to as a mixed culture, to explore whether the two breeding methods demonstrated economies of scale and a relationship based on production input factor substitution. This study determined that both farming methods demonstrated increasing returns to scale. In addition, the mixed culture method yielded apparently higher returns to scale compared with the rack culture. The mixed culture was found to be more profitable than the horizontal rack culture because of higher production and lower average cost. Both farming methods exhibited an apparently significant substitution relationship regarding capital investment and juvenile oyster input, and capital investment and fishing gear, suggesting that increasing capital price leads to increased juvenile oyster and fishing gear input in substitution of the capital use. 相似文献
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The Yunlin coastal area is the largest oyster culture in Taiwan; however, the oyster farmers reported the negative impact of a prolonged oyster culture period and an increased operating cost in 2010. This study uses the translog cost function to consider the possibility of an oyster culture period extension to estimate oyster cost elasticity, own‐price elasticities, and cross‐price (substitution) elasticities, to evaluate whether the oyster farming industry in Yunlin County has economies of scale, and to assess the relationship with a substitution of inputs. We found that the Yunlin oyster culture has economies of scale, and that the oyster farmers can expand production scale to reduce costs. The own‐price elasticities of demand for inputs are less than 1, indicating fairly inelastic factor demands in oyster production. The oyster farming industry displays strong substitutability between the prolonged culture period and capital input, suggesting that the oyster farming industry is more responsive to a higher prolonged culture period cost, in terms of capital input. 相似文献
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T. V. R. Pillay 《Aquaculture Economics & Management (Blackwell Science)》2013,17(1-2):3-11
Abstract Aquaculture management patterns are greatly influenced by the economic or social purpose of the project. Though some types of farms may yield both economic and social benefits, they can generally be classified on the basis of their major objective. Economic benefits, in one form or the other, gets considered in the planning stage of all farming activities; but it is necessary to ensure social and environmental viability as well to achieve sustainability. Subsistence and family farming, crop/animal integrated farming and farming for recreational purposes, are largely orientated to social benefits; whereas small‐scale farming enterprises, cooperative and state farms, as well as vertically integrated large‐scale farms are run mainly for economic gains. Stock enhancement and creation of culture‐based fisheries represent a mix of all the three elements of sustainability, with a stronger base of environmental improvement. The complexity of management differs significantly between these types of enterprises. The systems of production adopted, such as extensive, semi‐intensive, intensive and super‐intensive, as well as farm location (land‐based or open waters) bring about their own special management problems, especially in relation to ecological integrity. 相似文献
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Ale Analía Bacchetta Carla Rossi Andrea S. Scarabotti Pablo A. Cazenave Jimena 《Fish physiology and biochemistry》2021,47(4):829-839
Fish Physiology and Biochemistry - This study aimed to analyze the cold stress effects (in terms of hematology, energy reserves, and oxidative stress) in Piaractus mesopotamicus (pacú) and... 相似文献