• 研究报告 •

### 大麻哈鱼产卵场适宜性指数构建及权重分析

1. (1中国水产科学研究院黑龙江水产研究所， 哈尔滨 150070;  2上海海洋大学水产科学国家级实验教学示范中心， 上海 201306; 3上海海洋大学农业部鱼类营养与环境生态研究中心， 上海 201306)
• 出版日期:2019-12-10 发布日期:2019-12-10

### Suitability index construction and weight analysis for the spawning ground of Oncorhynchus keta.

CUI Kang-cheng1,2,3, LIU Wei1*, GAO Wen-yan1,2,3, LI Pei-lun1, WANG Ji-long1, TANG Fu-jiang1

1. (1Heilongjiang Institute of Fisheries, Chinese Academy of Fishery Sciences, Harbin 150070, China; 2National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China; 3Center for Research on Environmental Ecology and Fish Nutrition of the Ministry of Agriculture, Shanghai Ocean University, Shanghai 201306, China).
• Online:2019-12-10 Published:2019-12-10

Abstract: Spawning ground is an important place for the survival and reproduction of aquatic organisms. At different stages of life history, Oncorhynchus keta has different requirements for environmental factors. Based on the data of water quality, hydrology and aquatic organism survey during the breeding, hatching and migrating period of salmon in the lower reaches of Huma River from autumn 2017 to spring 2018, we used the fuzzy membership function and analytic hierarchy process to standardize the calculation and weight assignment of the environmental indices of salmon spawning ground. We established the evaluation model of salmon spawning ground to compare the suitability across different seasons. The results of standardization showed that water quality and hydrological factors in the lower reaches of the Huma River could better meet the environmental requirements of salmon spawning grounds. Weight analysis results showed that water temperature, dissolved oxygen, and sediment were the most important factors affecting the suitability of salmon spawning grounds in the lower reaches of the Huma River, followed by ammonia, pH and water depth, in autumn, winter, and spring. The results of the evaluation model showed that the suitability index of salmon spawning grounds in autumn, winter and spring were 0.839, 0.652 and 0.743, respectively. Our results indicated that the eco-environment suitability of salmon spawning grounds in the study region was good, with the best in autumn, followed by spring, and worse in winter.