丹江口水库渔获量及其相关因子的灰色关联分析

The Grey system Relevant Analysis of The Fish Catch and It's Relevant Factors of Danjiangkou Reservoir

利用丹江口水库1971～1990年的有关数据(渔获量,鱼种投放规格,渔政管理,捕捞力量,鱼种投放量,来水量,水库面积),采用灰色关联分析方法分析了影响其渔获量的各因素间的主从关系。结果表明:在鱼种投放规格小于16cm时,鱼种规格是影响渔获量的首要因子,其次分别是水库面积、捕捞力量、来水量和渔政管理,而与鱼种投放量关系最小。在鱼种投放规格为16～20.4cm的情况下,捕捞力量上升到第一位,鱼种投放量从第六位上升到第四位,鱼种投放规格从第一位下降到第二位,来水量从第四位下降到第六位。说明应在保持现有投放规格的基础上加大鱼种投放量和捕劳力量。渔政管理始终处于第五位,应加强渔政管理。

Using the data from 1971-1990 from DanJiangKou reservoir, we analyzes the primary and secondary relations of the factors influencing the fishcatch by using the. grey relevance analytical technique, Which include: fish catch, plunged fingerling size, fishery administration fishing power,plunged fingerling's weight, quantities of additional water and reservoir area. The research shows : that when the fingerling size is less than 16cm, the fingerling size becoms the most important factor influencing the fishcatch, which follows are fishing power, quantities of additional water and fishery administration respectivly; and the least is the plunged fingerling's weight, when the fingerling size is 16-20. 4cm, the fishing power comes to the first, plunged fingerling's weigh rises to the forth from the sixth, the plunged fingerling size and quantities of additional water are decrease respectivly to the second from the first and to the sixth from the froth. It indicates that it is reasonable to increase the plunged fingerling's weight and fishing power on the basis of the present plunged fingerling size. Fishery administration comes always to the fifth, which should be paid more attention.