洋圻湖水生生物资源及鱼产力分析

Analysis of Aquatic Organism Resources and Fishery Productive Ability in Yangqi Lake

洋圻湖浮游植物包括绿藻门、硅藻门、蓝藻门、金藻门、裸藻门、甲藻门、黄藻门等7门105属的种类,浮游动物包括原生动物、轮虫、枝角类、桡足类等4类78属。该湖浮游植物个体密度年平均为108.2万/1,浮游植物生物量年平均为13.25mg/1;浮游动物个体密度年平均为23458个/l,浮游动物生物量年平均为5.76mg/l。浮游植物、浮游动物的种类及生物量都存在明显季节变化。根据浮游生物生物量对该湖2000亩水面花白鲢鱼的生产力进行的估算推知其花白鲢的鱼产潜力为92960kg,其中白鲢80300kg,占86.4％,花鲢12660kg,占13.6％。

There are 105 genera phytoplankton which belong to Chlorophyta, Bacillariophyta, Cyanophyta, Chrysophyta, Euglenophyta, Pyrrophyta, Xanthophyta, and 78 genara zooplanktonwhich belong to Protozoa, Rotifera, Cladocera and Copepoda in Yangqi Lake.The year average individual density of phytoplankton and zooplankton are 1.082×10~7and 23458 individual/L, respectively.The year average biomass of phytonplankton and zooplankton are 13.25 and 5:76mg/L, respectively.Andthe species and biomass of phytonplankton and zooplankton could change obviouslywith season ch,anging in a year.According to the biomass of phytoplankton and zooplankton of the Lake, its fishery productive ability is 92960kg, of which the productive ability of silve carpe (Hypophthalmichthys molitrix) is 80300kg, makingup 86.4％ of the total quantity, and productive ability of bighead carp(Aristichthys nobils) is 12660kg, making up 13.6％