Abstract:

Correct evaluation of priority conservation order of fishes in the estuary and offshore has important significance for estuarine ecosystem management and maintenance of biological diversity.A set of index system and method of evaluation of priority conservation order of fishes is preferred to protect race fishes.Based on field survey and information collection,a new evaluation index system of priority conservation order of fishes is established by means of expert consultation and related research achievements,which is consisted of subsystems of the endangered species system,the genetic value system and the species value system.At the same time,the evaluation grade and standard of priority conservation order of fishes is determined.In order to overcome the subjective random of weight determination,the objective weights of evaluation indexes are calculated based on the information entropy principle.On the basis of this,ideal point method is introduced into multiobjective decision making evaluation of priority conservation order of fishes in the estuary and offshore.Furthermore,a model is established to evaluate priority of conservation order of fishes.Finally,the model is applied to evaluate priority conservation order of fishes in the Zhangweixin River Estuary and Offshore.The result shows that the method is very simple and the evaluation result is reliable,so it can be widely applied in estuarine ecosystem management