英那河水库渔业生态学调查

于2002—2003年夏、秋、冬季和春季分别对扩建前的英那河水库非生物环境、生物群落和渔产力进行了调查。结果表明：英那河水库属于富营养型,N∶P值达62.62,属于磷限制型水库;浮游植物共有151个种属,密度为2.5×10^7个/L,生物量为10.58 mg/L,以硅藻和绿藻占优势,叶绿素a含量为15.31μg/L;浮游动物共见到83个种属,密度为992个/L,生物量为4.21 mg/L,以枝角类和桡足类为主;超微藻类的密度为（0.73-5.80）×107个/L;浮游细菌总数为2.57×10^7个/L,夏季最高,达5.78×10^7个/L;异氧菌密度平均为2.53×10^6个/L;底栖动物5种,密度平均为471个/m^2,生物量为1.21 g/m^2,以粗腹摇蚊幼虫和水丝蚓占优势;共有水生维管束植物2种,鱼类39种,软体动物2种。此外,还对英那河水库的水质类型、营养状况和鱼产力进行了讨论。

Survey of fishery ecology in Yingnahe Reservoir in Dalian

The water quality, communities of aquatic organisms and evaluation of fishery productivity were studied in Yingnahe Reservoir in summer, autumn, winter and spring from 2002 to 2003. The Yingnahe Reservoir as a phosphorus limiting reservoir was found to be eutrophication waters with N： P ratio of 62.62. A total of 151 taxa of phytoplankton and 83 taxa of zooplankton were identified in Yingnahe Reservoir. There were abundance of phytoplankton of 2.5×10^7 ind./L and biomass of 10.58 mg/L. The diatom and green algae were of the predominant phytoplankton species. The abundance of total zooplankton was 992 ind./L and the biomass of 4.21 mg/L. The predominant zooplankton were cladocera and copepoda. The density of picoplankton reached （0.73 -5.80）×10^7 ind./L, and the total abundance of bacteriaplankton 2.57×10^7 ind./L, the peak in summer （5. 78×10^7 ind./L）. There was 2.53×10^6 ind./L of heterbacerria. Five taxa of benthos were identified with mean density of 471 ind./m^2 and biomass of 1.21 g/m^2. The predominant species were Pelopia and Limnodrilus hoffmeisteri. Two species of water macrophytes, 39 fish species and 2 shellfish species were distributed in Yingnahe Reservoir. The eutrophic situation, and fishery productivity were discussed.