【摘要】 2013年度,调查分析岩滩水库渔民6个月全部渔获物1 409.55kg、52 365尾,青鱼生物学数据21组。结果显示,库区放流青鱼的年龄与相应体长生长指标正常,体长及全长生长比例协调,88.89%的放流青鱼超出其理论体重、平均超重25.15%,库区青鱼难以自然增殖。2013年度库区水域放流青鱼31万尾,可产出青鱼123 000 kg,直接经济价值246万元,间接经济效益384万元,直接效益投入产出比1:53。放流青鱼可去除库区底栖动物1 230 000 kg,提取库区水体中的氮3 690 kg、磷740 kg。鱼类增殖放流已在岩滩水库显现较大的经济效益、生态效益及社会效益,但库区鱼类资源枯竭,渔业生态环境隐患依然存在,库区应坚持青鱼增殖放流,并进一步增加增殖放流青鱼数量。更多还原

【Abstract】 The research explored growth and development,economic profits,and ecological benefits of released black carps on basis of 21 group ecological data on 52365 fish within 6 months.The results indicated that the age and growth index of released black carp were normal and body length and size were coordinated;88.89% released black carps exceeded theoretical weight,with an average of 25.15%,which indicated that black carps are hardly to reproduct naturally.In 2013,310 000 black carps were released in the Reservoir,and 123 tons black carps were obtained,with direct economic value of 2.46 million yuan and indirect economic value of 3.84 million yuan.It can be concluded based on averages that 123 tons black carps can be produced in 2013 and 3 690 kg nitrogen and 740 kg phosphorus can be removed.The releasing of fish has shown much more economic,ecological and social benefits in Yantan Reservoir,but the hidden dangers still exist on fishery environment.Therefore,it is necessary to further increase the number of released black carps in the Reservoir.更多还原