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绥芬河水域是黑龙江省的一条独立水系,主要流经东宁县由绥芬河下水磨河段入苏联境内,自海参崴入日本海。绥芬河是大麻哈鱼和鲤科唯一溯河洄游鱼——滩头雅罗鱼的溯河繁殖的母河川。近年来绥芬河水域的水产资源也遭到严重的破坏,特别是名贵经济鱼类大麻哈鱼的产量下降到每年只有800—1000尾。为了增殖绥芬河水域大麻哈鱼资源,恢复绥芬河母河川,1988年建立起东平县鲑鱼放流站。并于当年春季首次向绥芬河放流驼背大麻哈鱼苗80万尾,其中做标志鱼3万尾。今年6月至8月是放流驼背大麻哈鱼的洄游季节,黑龙江省水产研究所和东宁县鲑鱼放流站对这一人工放流科研项目进行了调查。截止今年8月末,已在绥芬河下水磨河段捕到驼背大麻哈鱼610尾,平均体重0.95—1.5公斤,平均体长40—50厘米,其中做放流标志的鱼5尾,被剪掉的仔鳍没有再生长出 相似文献
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正大麻哈鱼(Oncorhynchus keta Walbaum),地方名:大麻哈鱼、秋鲑、大马哈鱼,是北半球著名的经济鱼类,栖息于太平洋北部(N33-N72)沿岸水域,是大麻哈鱼属在太平洋中分布相对广泛的一个种类。绥芬河水系大麻哈鱼类种群属于北太平洋亚洲群系滨海州地理生态种群,由日本海经下游(俄罗斯境内)溯入我国境内,每年9月上旬至10月末溯游到绥芬河东宁江段,是绥芬河水系重要的经济鱼类。我国大麻哈鱼增殖放流已有几十年的历史。哈尔滨水产试验场于1956年在乌苏里江首次开展大麻哈鱼人工孵化放流;吉林省水产研究所于1962年在图们江开展人工孵化放流;黑龙江水产研究所 相似文献
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大麻哈鱼类是分布在北太平洋水域的溯河性洄游鱼类,以分布广泛、渔获量高、营养丰富等特点而成为世界著名经济鱼类。北太平洋大麻哈鱼有6种,分布西岸亚洲区域有4种,溯入我国河流境内有3种,即细鳞大麻哈鱼[Oncomyhchsu gorbusha(Walbaum,1792),亦称驼背大麻哈鱼、地方 相似文献
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<正> 孟苏大麻哈鱼Oncorhynchus masu(Brevooirt系冷水性溯河产卵鱼类,是大麻哈鱼属中适应温度较高的一种。分布于太平洋北海岸,南至日本四国、九洲,北至苏联堪察加以及朝鲜洛东江以北的东海岸。在我国仅产于图门江和绥芬河水系。近十几年来,图门江水系的渔业资源遭到严重破坏, 相似文献
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绥芬河滩头雅罗鱼孵化放流的初步试验 总被引：1，自引：0，他引：1
本文首次报道绥芬河滩头雅罗鱼大批量人工孵化放流。1989年5～6月,在绥芬河东宁河段采捕、利用(?)河亲鱼3037尾,采卵1867万粒,利用自然产卵场生态条件孵化放流的雅鱼1323万尾(全长6.5mm)。 相似文献
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史氏鲟、达氏鳇的资源现状与研究进展 总被引：2，自引：0，他引：2
史氏鲟（Acipenser schrencki)，达氏鳇（Huso dauricus)属鲟科鱼类，是黑龙江的主要经济鱼类之一。由于近年来过度捕捞，资源遭到一定程度的破坏。本主要通过对黑龙江某江段上的捕捞生产调查统计，评估其现有资源状况，并提出了五个方面的建议。同时介绍了我国目前对鲟鱼研究方面的进展情况。1957年黑龙江水产研究所成功地进行了史氏鲟的人工繁殖试验，以后除了五十年代和七十年代的一些调查工作外，基本上中断了对这条鱼的人工繁殖试验工作。1989年，黑龙江省国营农场总局在勤得利农场建立了第一个史氏鲟放流试验站，当年就进行了人工繁殖和放流工作。四年中，向黑龙江放流鲟鱼苗累计达107万尾。在此期间有关的科研和生产单位利用这一条件开展对鲟鱼的研究，本还介绍了正在进行的“史氏鲟活体取卵手术技术研究”、“鲟幼鱼人工饲料研究”和“人工养殖技术研究”等。 相似文献
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绥芬河污染对大麻哈鱼、滩头雅罗鱼及水生生物影响的调查监测 总被引：1，自引：0，他引：1
绥芬河为中俄共有河，是黑龙江省的产鱼区之一，本介绍了该河流水质常规分析，工厂污水分析、鱼体残毒分析、浮游动物、浮游植物、底栖生物、着生藻类定性、定量及鱼类急性致毒性试验结果，同时进行了水质评价。结果表明：该河流经环境治理，水质状况得以改善，属于寡污带河流，基本达到渔业水质标准，是我国少有的清洁河流，对该河流洄流的四种大麻哈鱼、两种滩头鱼和生存的其它水生生物不构成危害性影响。 相似文献
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The River Blythe lies between the cities of Birmingham and Coventry. It has been notified recently as a statutory Site of Special Scientific Interest (SSSI) and is one of the few whole-river SSSIs in Britain. It possesses a combination of natural course and structure which is a rare feature of lowland rivers in England. There is a clear succession of plant communities from its source to its confluence with the River Tame. Botanically it is one of the richest rivers in England. A study in 1982 recorded 159 macroinvertebrate taxa from the river. A notable feature is the species richness of the molluscs, oligochaetes and caddis-flies. The Blythe is subject to a range of pressures including land drainage, recreation and development (buildings and infrastrucure). The appropriate option for its conservation management is limitation of catchment development. In order that this nationally important resource is conserved for future generations, a strategic approach to catchment management is needed combined with urban and infrastructure developments which are environmentally sustainable. The preparation of a catchment management strategy needs to be given a priority. The success of such a strategy will be dependent on cooperation between English Nature, the National Rivers Authority, the local planning authorities and the many riparian owners and occupiers. English Nature is cooperating with the National Rivers Authority to produce a ‘special ecosystem’ classification so that statutory Water Quality Objectives can be set to protect river SSSIs like the Blythe. 8. The goodwill of the riparian owners and occupiers is needed for the protection and enhancement of wildlife habitats along the river. 相似文献
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本报道绥芬河开展大麻哈鱼人工繁殖与孵化放流试验。1989、1991、1993年共采捕利用亲鱼674尾，其中雌亲鱼365尾， 采卵101．6万粒，雌亲鱼利用率为81．3％，受精率为95．6％，孵化率为96．3％，稚鱼饲养成活率为92．5％，放流稚鱼共92．2万尾。本项试验为该水系大麻哈鱼大规模殖放流提供必要的技术参数。 相似文献
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霍尔果斯河为中国和哈萨克斯坦的界河, 人类从没有对其进行过水生生物的研究, 为了合理开发利用该河水资源, 保护生态环境, 2007年6~ 7月调查组对霍尔果斯河进行了2次调查, 共采集浮游生物样本20瓶, 底栖动物样本5瓶, 鱼类标本164尾。通过野外物种样本采集和室内分析研究, 表明: 霍尔果斯河有浮游植物3门34种属, 浮游动物5个种属, 底栖动物10种, 水生植物仅2个种属, 鱼类10种( 其中土著鱼类5种)。由于该河为边境界河, 人烟罕至, 水域生态环境保持原始状态, 鱼类资源丰富。 相似文献
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- River fish diversity is threatened by anthropogenic environmental alteration to landscapes. The early life-history stages of fish play an important role in maintaining diversity and population recruitment and can be heavily influenced by landscape patterns. Information on temporal and spatial distribution patterns of fish eggs and larvae is also important for biodiversity conservation and management of fish resources.
- The Yangtze River possesses a high diversity of fishes, including many commercially important species. The economy along the lower reach of the river is well developed, and most of the area is experiencing high pressure from human impacts. This section of the Yangtze River connects with the largest freshwater lake in China at the upstream end and flows into the estuary at the downstream end. These two landscape features are likely to have a significant impact upon the spatial distributions of fish egg and larval assemblages.
- Environmental variables, fish eggs, and larval assemblages were sampled in three locations, at Hukou, Anqing, and Jingjiang, in the lower reach of the Yangtze River. The results suggest that the higher number of species and greater abundance in upstream sites reflect the critical function of connectivity of Poyang Lake with the river for fish recruitment in the lower Yangtze. The delayed bloom of larval fish, occurrence of estuarine species, and a lower species number and abundance of freshwater fish downstream reflect the influence of tidal intrusion from the estuary.
- This study highlights the value of maintaining natural river–lakes connectivity in the Yangtze River as a conservation measure. The connected river–lake system should be designated as a priority area for fish resource protection in the lower reach of the Yangtze River. We recommend further measures to break down barriers between the river and other lakes and to restore the natural lateral connectivity of the floodplain ecosystem.