摘要
[目的]研究滤食性鱼类对阳澄西湖生态、经济的影响。[方法]2009年3-12月,对阳澄西湖7个入水口、6个出水口及湖区5个围养区域水质进行跟踪监测,并对经济效益作了调查。[结果]阳澄西湖出水口水质优于入水口,生态围养区水质优于出、入水口水质,但整体水质属于V类或劣V类水。全湖叶绿素年平均水平为39.67 mg/L,生态围养经济效益为1 001.3万元,以渔获物形式移出湖体的N、P分别为33.7、10.0 t。[结论]围养滤食性鱼类控藻效应明显,经济效益可观。鉴于阳澄西湖目前营养盐水平较高,宜继续实施以放养滤食性鱼类为主体的渔业模式。
[Objective]The effects of planktivorous fish on the ecological and economical evaluation in west Yangcheng lake were studied.[Method]Planktivorous fish was cultured in 5 large enclosures.Water quality in7 inlets,6 outlets,and 5 enclosures were monitored fromMarchto December,2009,and economic benefitwas calculated.[Result]The water quality of outletwas better than thatof inlet,and thatwas the bestinthe enclosures.However,the water quality was or was worse than Class Vof the water quality standard.The average concentration of chlorophylla in enclosures was39.67 mg/Lin the whole year.Planktivorous fish culture brought economic benefit of10.013 million yuan.Meanwhile,33.7tons of Nand 10.0 tons of P were removed fromthe lake by fisheries.[Conclusion]Planktivorous fish culture controlled algal blooms effectively.Because of the high level of nutrients in the lake,it was necessary to keep the fishery patterns of culturing planktivorous fish.
出处
《安徽农业科学》
CAS
北大核心
2011年第7期4024-4026,共3页
Journal of Anhui Agricultural Sciences
基金
江苏省苏州市相城区农发局实事工程项目
水体污染控制与治理科技重大专项(2008ZX07101-012)
中国科学院知识创新工程项目(KZCX1-YW14)
关键词
阳澄西湖
滤食性鱼类
水质
经济效益
West Yangcheng lake
Planktivorous fish
Water quality
Economic benefit
