基于灰色理论探究生态环境对鱼类优势种群的影响

Effect of Ecological Environment on Dominant Population of Fish Based on Grey Theory

为探究生态环境变化对鱼类优势种群的影响,以楠溪江2007—2011年鱼类打捞数据为依据,运用灰色理论建立平均肥满度、灰色关联度分析和灰色预测等模型,并借助Matlab和Excel软件编程,探讨生态环境对鱼类生存状况的影响.各鱼类的生态状况显示,鲫鱼最佳,河川沙塘鳢等16种鱼中等,中华花鳅、泥鳅和鲶鱼较差.建议采取改善水体质量,培植相关植物,确保鱼类生物多样性等措施,进一步改善鱼类的生态环境.

In order to explore the effect of the ecological environment change on the dominant population of f ish , based on the data of fish salvage in Nanxi River during the period of 2007 -2011 , the statistical model for average fatness, grey relational analysis model and grey prediction model were established by using Grey Theory. With the help of MATLAB and EXCEL software programming, the effect of ecological environment on fish living condition was studied. The ecological status of different fish showed that crucian carp was the best, snakehead and other sixteen kinds were medium but Loach, Cobitis sinensis, Catfish were the poorest. It is suggested that the water quality be improved, the relevant vegetation planted to ensure the diversity of fish and the ecological environment.