摘要
对利用滤食性鲢鱼、鳙鱼的生物操纵作用抑制水源水中孳生的剑水蚤类浮游动物进行了探讨.在不投加任何饵料的条件下,进行微型生态系统的试验研究.结果表明:鱼类的放养生物量对其生物操纵作用具有重要的影响,适宜生物量的鲢鱼、鳙鱼的放养,可以有效地抑制剑水蚤类浮游动物的孳生,并通过影响水体中营养物质水平和生物群落结构,帮助水体水质的恢复;放养生物量过低难以有效地控制剑水蚤的生长,过高的放养生物量会导致鱼类捕食活动过于剧烈,加速营养物质自下而上的补充,甚至有可能会破坏水中正常的食物链关系.
An ecological project called fish biomanipulation is put forward for control of excessive propagation of Cyclops by stocking the filter-feeding fish, such as silver carp and bighead carp, under the condition of no extraneous nutrient feeding. The result of experiments with different stocking biomasses showed that the propagation of Cyclops could be controlled effectively, and the water quality could be improved simultaneous by impacting the nutriment level and plankton community structure at proper stocking density. The growth of Cyclops may not be effectually controlled at low biomass of fish, while the natural food chain relation may be destroyed at high stocking density. In addition, the high predator pressure at high stocking density may accelerate the supplemental rate of nutriments from bottom sediment to water body and finally increase the content of total nitrogen and total phosphorus in water.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2006年第5期481-484,共4页
Journal of Hohai University(Natural Sciences)
基金
国家"863"攻关专项课题资助项目(2002AA601140)
关键词
滤食性鱼类
剑水蚤
浮游动物
生物操纵
水处理
filter-feeding fish
Cyclops
zooplankton
biomanipulation
water treatment
