共查询到19条相似文献，搜索用时 78 毫秒
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汕头市着力发展海洋增殖渔业，于7月份在濠江区企望湾、潮阳区海门港、南澳岛等地海域相继开展南方鲎、黑鲷、黄鳍鲷、花尾胡椒鲷等品种的人工增殖放流活动，已成功放流南方鲎200只，开创了我国增殖放流南方鲎的先例；增殖放流优质鱼苗168万多尾。这是该市历年来渔业增殖放流规模最大的一次。 相似文献
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影响渔业资源增殖放流效果的主要因素探讨 总被引：1，自引：0，他引：1
《渔业现代化》2015,(4)
增殖放流是恢复渔业资源、保护生物多样性、改善水域生态环境和促进渔业资源可持续利用的重要途径,许多国家都开展了大规模的增殖放流活动。但由于对放流技术及后续管理研究不充分,增殖放流工作存在一定的盲目性,导致一些增殖放流效果不明显。为指导科学地开展增殖放流工作,获得更好的增殖放流效果,通过对国内外渔业资源增殖放流相关文献与案例的综合分析,探讨了影响渔业资源增殖放流效果的主要因素,分析了各因素中的关键点和择优应用的措施与经验:确定适宜的苗种放流规格范围及放流数量,选择适宜的放流生境;确保放流的苗种强健无病,采用适宜的苗种运输与放流操作方式;确定适宜的放流时间;加强增殖放流后期的管理,制定科学有效保护措施,保护好放流水域和放流种群等。 相似文献
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渔业资源增殖放流效果评估方法的研究 总被引：8，自引：2，他引：8
依据渔业资源评估原理,结合渔业资源增殖放流的特点,提出一套计算群体生物统计量进而评估渔业资源增殖放流效果的方法。选用渔业资源评估模型,估算未建立生长方程的增殖放流种类的生长参数及其自然死亡系数,以及增殖放流种类的合理放流数量。提出确认渔获物中来自放流种苗数量的方法。推导了计算捕捞死亡系数和按时间序列计算放流群体残存量、回捕量、回捕率和回捕效益等的公式。 相似文献
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浅谈闽江流域渔业资源增殖放流 总被引：2，自引：0，他引：2
渔业资源增殖放流是改善水域生态环境,恢复渔业资源、保护生物多样性和促进渔业资源可持续利用的重要途径之一.本文在分析研究闽江流域渔业资源及其增殖放流现状、存在问题的基础上对今后增殖放流工作提出六点建议. 相似文献
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为量化评估增殖放流鱼类产生的经济效益和生态价值,根据广西2013年度中央财政渔业资源保护项目增殖放流鱼类的品种、规格、数量,利用鱼类的生长特征参数、自然死亡系数和捕捞死亡系数,通过巴拉诺夫产量方程估算增殖放流鱼类的回捕量以及水生生物营养转换传递参数、成本参数和市场价格。结果显示,该项目增殖放流鱼类回捕的直接经济效益为10 293万元,投入产出比为1∶25;回捕的放流鱼类从水域中提取氮127.9 t,磷25.6 t,碳汇输出1 874.5 t;回捕放流鱼类及存留鱼类共消耗水域底栖动物44 327.2 t;年度放流总生态价值5 775万元。调查结果表明,开展鱼类增殖放流能产生较好的渔业经济效益和生态效益,有利于维护渔业生态环境健康。 相似文献
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The enhancement of cod stocks 总被引：6，自引：0，他引：6
T. Svåsand T.S. Kristiansen T. Pedersen A.G.V. Salvanes R. Engelsen G. Nævdal & M. Nødtvedt 《Fish and Fisheries》2000,1(2):173-205
Atlantic cod have been a primary target for marine stock enhancement since the 1880s. In the early part of this period, hatched larvae were released in Norway, the USA and Canada. The last larval releases were conducted in Norway in 1971, and a century of cod larvae releases were halted without any clear evidence of benefit. Since the early 1980s, the focus has been on production of larger, more viable juvenile cod. Emphasis has been given to the design of tag–release programmes involving large-scale releases and ecosystem analysis in selected ecosystems. Most of this research has been carried out in Norway, where more than one million tagged juvenile cod have been released. Smaller stocking experiments have also been performed in Denmark, Sweden, the Faroe Islands and the USA.
This paper reviews the major findings from these programmes. We include summaries and evaluations of rearing techniques for juvenile cod, methods of tagging and recapture, experimental fishing, migration, mortality and growth rates in the different habitats, genetic analysis, and ecosystem studies that have tried to describe the variation in the cod carrying capacity of selected release areas.
Despite relatively large variation in environmental conditions, in cod production and in fishing mortality along the Norwegian coast, results indicate that, under the conditions experienced during the 1980s and 1990s, releases of juvenile cod did not significantly increase cod production and catches. The biological limitations and future prospects of Atlantic cod stock enhancement are addressed. 相似文献
This paper reviews the major findings from these programmes. We include summaries and evaluations of rearing techniques for juvenile cod, methods of tagging and recapture, experimental fishing, migration, mortality and growth rates in the different habitats, genetic analysis, and ecosystem studies that have tried to describe the variation in the cod carrying capacity of selected release areas.
Despite relatively large variation in environmental conditions, in cod production and in fishing mortality along the Norwegian coast, results indicate that, under the conditions experienced during the 1980s and 1990s, releases of juvenile cod did not significantly increase cod production and catches. The biological limitations and future prospects of Atlantic cod stock enhancement are addressed. 相似文献
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本试验按照无公害水产品的生产标准 ,选择生产基地 ,利用生态的方法 ,满足其生长的生物学要求 ,探索以低成本 ,养殖大规格、优质商品蟹的高效养殖技术。现将其情况总结如下。1 材料与方法1 1 生产基地的选择按环境空气质量符合ＧＢ30 95 - 1996标准、养殖水质符合ＧＢ116 0 7- 89标准、土壤环境质量符合ＧＢ15 6 18- 1995标准 ,选择适合河蟹生长的大水面。1 2 湖泊生态条件簸箕湖位于安徽省宣州市境内 ,为皖第二大湖南漪湖的围拦而成 ,水源主要为山溪 ,有一溢洪道与南漪湖相通。面积为 135ｈｍ2 ,湖底浅锅底形。湖区水草、螺蛳多 ,天然饵… 相似文献
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Current approaches to the enhancement of fisheries 总被引：3，自引：0，他引：3
With increasing pressure on the world's inland and coastal marine fisheries, increases in production and quality of yield are being sought through the application of a range of enhancement techniques. Which of these is applied depends on the attitude to the natural resource by societies at different levels of economic development. The range of enhancement techniques involves increasing levels of human input and control which raise productivity significantly, but which also raise costs. Introductions have raised production in many areas of the world at the price of the risk of environmental disruption. Stocking is extremely widespread but has generally been applied uncritically. A variety of models are proposed to serve as a basis for more rigorous evaluation of biological and economic effectiveness of this practice. Fertilization of water bodies is used to raise levels of production further. Elimination of unwanted species then becomes necessary to maximize benefits from the target species. Adjustments to the habitats within the water body assist in raising general levels of productivity which culminate in the conversion of areas of the water into fish ponds or for cage culture. This process has important implications for the social, economic and policy context which necessitates shifts in ownership, finance and education among populations where these types of development occur. 相似文献
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怀头鲶(Silurus soldatovi)也称黑龙江六须鲶、怀头和怀子,隶属于鲶形目、鲶科、鲶属,在黑龙江、松花江、乌苏里江、嫩江等水域以及一些大型湖泊中均有分布。怀头鲶是一种大型鱼类,最大个体可达100kg以上。怀头鲶适应环境能力强,耐低氧,生长速度快,容易饲养,起捕率高,鱼苗当年即可养成商品鱼。近年来,怀头鲶在北方地区养殖取得了较好效果,已发展成为重要的名特优养殖品种,其养殖前景看好。一、怀头鲶与普通鲶鱼的主要区别1.怀头鲶身体两侧有一条明显的金黄色侧线,而普通鲶鱼侧线呈黑色。2.怀头鲶的胸鳍硬刺后缘光滑,而普通鲶鱼具有锯齿。用… 相似文献
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闪电河水库位于内蒙古高原的坝上地区,宜渔水面400~760 hm2。渔业综合增殖措施是:移植保护水生植物,调整鱼种放养结构,网箱培育大规格鱼种,增殖高背鲫和池沼公鱼,投饵施肥,加强看护,定点垂钓。为大水面渔业合理开发、水产业可持续发展得出一些可以借鉴的新途径。2000年开始项目实施,2003年底已收回全部投资,2004和2005年共计盈余346.6万元,投入产出比约1∶1.92。 相似文献
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海洋生物资源增殖放流回顾与展望 总被引：14，自引：6，他引：8
海洋生物资源增殖放流是一项实现海洋渔业可持续发展的重要管理措施。本文简要回顾了海洋生物资源增殖放流的发展历史,分析了过去一百多年来各国增殖放流实践中的经验和教训,同时介绍了当前倡导的负责任海洋生物资源增殖放流理念,以期为中国今后的增殖放流工作提供参考与借鉴。 相似文献
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石磺的生物学特性及其增养殖前景分析 总被引：23，自引：0，他引：23
石磺(Onchidium verruculatum Cuvier)俗名土鸡,海蛤,海癞蛤蟆等,属于亚热带的腹足纲贝类,广泛分布于印度——太平洋沿岸的河口海域,国内则多分布于东海和南海,江苏、上海、浙江、福建、广东、香港等沿海地区的资源量很大。在我国,除了一些资源调查报告中对石磺的分布状况有简单叙述以外,几乎看不到这方面的完整资料,现笔者根据多年观察研究的结果,介绍这一具有开发利用前景的药用贝类。一、石磺的生物学特性1.外形结构 石磺体呈卵圆形或椭圆形,成体体长6.0cm左右,体宽3.7cm左右,平均体重14g,全身裸露无壳,体表呈青兰色、灰色并夹杂绿色… 相似文献