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细菌性疾病是危害我国水产养殖动物最严重的疾病,其病原种类多,流行地区广,危害养殖水域类别多,给养殖业造成巨大的经济损失。结合水产养殖病害检测结果和养殖场实地调研,发现近期水产养殖动物细菌性疾病具有以下几种发展趋势。 相似文献
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10月中旬,江苏扬州高邮市召开鳜鱼养殖与病害防治专题研讨会。省、扬州市水产专家以及高邮市鳜鱼养殖重点乡镇分管负责人、鳜鱼养殖户代表、鱼药经销商等参加研讨会。 相似文献
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近年来,水产养殖病害呈现出发病品种多、病害种类多、流行范围广、发病季节长、病情紧急等趋势。很多养殖户因为未能及时确诊病原,采取有效控制措施,给养殖生产带来了损失。病害已经成为制约水产养殖业发展、影响渔民增产增收的重要因素之一。然而在全国的一些地方,"一台电脑、一根网线,改变了传统的鱼病诊治方法,养殖者足不出户就能得到水产病害防治专家的远程指导,感受科技进步的成果……"这一改变源自一家民营科技公司的介入。最近,本刊记者对该公司的经理陶长坤进行了专访。 相似文献
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当前水产养殖业病害防治的误区及今后对策(二)六、几个容易忽视的问题我国养殖鱼类人工繁殖工作,除极少数的名贵品种尚待研究外,水产界普遍认为这不是什么新课题,所以鱼类近亲繁殖现象也不被人们所关注。虽然有的专家早就提出近亲繁殖弊多利少,国家也曾拨专款兴建长... 相似文献
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鲟鱼工厂化高密度循环水养殖模式的应用已越来越广泛。循环水养殖存在着氨氮、磷酸盐总量不断积累的问题,影响鲟鱼品质和产量。为了提高鲟鱼循环水养殖效果,本文采用了6种水生植物,研究了其调节鲟鱼养殖水体氨氮与磷酸盐等水质、促进鲟鱼生长、改善鲟鱼品质的作用,结果显示:种植了水生植物的A、B试验单元氨氮去除率分别为76.4%与56.6%,磷酸盐去除率分别为64%与44.0%;鲟鱼养殖成活率分别为96.8%与96.5%,饵料系数分别为1.52与1.63;鲟鱼肉质口感好,没有泥腥味。结果表明,水生植物对养殖水体中氮、磷具有极强的去除能力,通过对水质的改良能提高鲟鱼养殖效果和品质。 相似文献
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HU BAO-TONG 《Aquaculture Research》1994,25(3):305-310
Abstract. This paper is divided into four parts. First, history: cage culture has long been practised. The origin of cage culture world-wide should be regarded as the middle reaches of the Yangtze River, China, in the Sung Dynasty. Second, characteristics of cage culture in China. Third, influence: development of open-water fisheries is actively promoted in lakes, reservoirs and rivers. More kinds of water bodies have been employed for this purpose. Marine cages have also rapidly developed. Finally, discussion and conclusions. Cage culture is a modern development of aquaculture which has changed the long-established, fish-farming structures and, to a great extent, pushed forward fisheries development in China. Cage culture is typically characterized by intensive farming, running-water culture, high yield and great efficiency. It is generally accepted that cage culture will actively play an increasingly important role in international aquaculture. 相似文献
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水产育种是世界各国竞相发展的热点研究领域,育种技术开发和优良品种培育充分体现了一个国家的综合创新实力和市场竞争能力。开展水产养殖生物的遗传育种研究,可提高种质资源开发强度和基因资源挖掘深度,发掘我国水产种业科技潜能和增强产业化应用水平。我国水产育种涵盖了完整的品种育成和扩繁推两大系统,已经成为推动水产养殖业绿色发展的重中之重,在保障优质蛋白稳定供给、提升种业强国竞争实力和改善国民饮食消费习惯等方面展示了杰出功效。随着生命科学特别是分子生物学和基因组学的飞速发展,我国水产育种取得了丰硕的科研成果,但也遇到了诸多核心瓶颈和制约因素。本文概括性总结了开展水产育种研究的重要意义,分析了当前我国水产育种研究的整体现状,凝练了亟需突破和解决的关键问题,提出了强化种质资源挖掘与高效利用、重视基础研究开展源头创新、研发前沿技术进行重点攻关、聚焦市场需求培育优良新品种等今后研究重点任务,形成了建设种质资源保藏体系、建成创新支撑平台、推进保护政策扶持、打造新型研发主体等对策建议,以期为我国引领世界水产育种研究和新时代渔业转型升级提供参考资料。 相似文献
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水产品加工流通是实现渔业高质量发展的关键环节,对保障水产品常年优质安全供应、助推国家“食物安全战略”和“健康中国战略”实施发挥了重要作用。新中国成立后,通过自主创新、技术引进与消化吸收,水产品加工流通科技持续进步,产业快速发展。形成了冷冻冷藏水产品、鱼糜制品、休闲食品、干制品、罐藏食品、海藻食品、水产饲料、生物制品加工等全世界最完善的水产加工体系和以批发市场为主体、电商等新型物流模式快速发展的水产品流通体系。本文分析了水产品在提供优质蛋白质和ω-3多不饱和脂肪酸等必需营养素、平衡居民膳食结构、降低陆生动物性食物生产压力等方面的重要作用;系统总结了我国水产品加工流通产业科技发展现状、存在问题及发展方向;提出了“构建以消费引导加工、加工引领养殖的现代渔业产业体系,保障食物安全”、“构建水产品梯次加工利用技术体系,保障水产品安全优质供应”、“构建水产品功效成分的精准加工技术体系,助推建康中国战略实施”等保障我国水产品加工与流通产业高质量发展的新举措。 相似文献
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循环流水水产养殖可持续发展特性探讨 总被引:3,自引:0,他引:3
水产养殖是农业生产的重要组成部分 ,在过去的五十年中得到了迅猛发展。在现代科技的支持下 ,水产养殖有望成为继种植业之后的第二大食物产业。但传统的养殖方式由于技术和管理问题 ,已越来越暴露出不可持续生产的局限性 ,不但自身受到暴发性流行病的困扰 ,生产效益的持续性得不到保证 ,而且还存在破坏生态环境和浪费资源 (水、饵料等 )等弊端。如何对旧的生产方式进行改革 ,在有限的资源条件下 ,进一步提高水产养殖生产水平 ,同时又保护和改善生态环境 ,实现可持续发展 ,是现代水产养殖所面临的最严峻的挑战。可持续发展是社会、经济发展和… 相似文献
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Design and performance of recirculating aquaculture system for marine finfish broodstock development
Tropical and subtropical climatic conditions in India present an ideal and unique opportunity for being the leader in tropical marine finfish aquaculture. However, the problem persist due to non-availability of marine finfish seed for the culture. In response to this problem, broodstock development of different tropical marine finfishes for seed production was started. The present study was undertaken to design a recirculating aquaculture system (RAS) and studying their performance in managing the various water quality required for the marine finfish broodstock development and breeding. The design of RAS, developed in the present study, included a broodstock tank, egg collection chamber, electrical pump, rapid sand filter, venturi type protein skimmer and biological filter. Two RAS were designed, one was stocked with a demersal fish species, orange spotted grouper (Epinephelus coioides) and the other was stocked with a pelagic fish species, Indian pompano (Trachinotus mookalee) at the rate 1 and 0.5 kg/m3 with a sex ratio of 1:1 and 1:2 (female: male) respectively. Various physio-chemical parameters, viz, total ammonia nitrogen (TAN), nitrite, nitrate, pH, alkalinity, temperature, free carbon dioxide (CO2) and dissolved oxygen (DO) of both tank water were analyzed to assess the performance of recirculating aquaculture system in maintaining the water quality. Gonadal development of the fishes was assessed and the spawning performance was recorded and finally, economic performance of the system was also evaluated. During the entire experimental period, mean monthly total ammonia nitrogen was less than 0.07 and 0.06 mg L−1 and mean monthly nitrite was less than 0.02 and 0.01 mg L−1 in orange spotted grouper and Indian pompano RAS tanks respectively. The pH (7.8–8.2), DO (>4 mg/L) and alkalinity (100–120 mg/L) were found to be in optimum range in both recirculating aquaculture systems. Carbon dioxide was found to be nil during the entire experimental period in both the systems. In fact these levels were comparable or less than that is reported as the permissible limits for broodstock development. Indian pompano and Orange spotted grouper matured and spawning was obtained with production of fertilized eggs round the year. Economic evaluation showed the price of 10,000 fertilized eggs of orange spotted grouper to be US $ 1.33. The design of RAS devised in the present study is efficient in controlling and maintaining optimum water quality for broodstock development of both demersal and pelagic finfishes. The fishes stocked in RAS attained final maturation and round the year spawning was obtained. 相似文献
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祁连是一个以草地畜牧业为经济支柱的牧业县,畜牧养殖业在国民经济中占举足轻重的作用。发展畜牧养殖业业既是传统的民族经济,又是全县主导基础产业,发展藏羊、牦牛产业是提高我县农牧民收入的根本,对该县牲畜存栏情况、养殖藏羊、牦牛发展状况及存在的问题、进行了调查。 相似文献