关键词: 优势鱼类, 种群参数, 资源现状, 黄河干流河南省段

Abstract: To evaluate the growth dynamics and utilization status of fish resources in the Henan section of the main stream of the Yellow River，fish resources were investigated in 11 sections of Henan section of the main stream of the Yellow River in June（summer）and October（autumn）of 2023，January（winter）and May（spring）of 2024. Growth and mortality parameters as well as resource utilization status were analyzed for five dominant fish species Parabramis pekinensis，Carassius auratus，Hemiculter leucisculus，Pseudobrama simoni，Cyprinus carpio by using FiSAT Ⅱ software.The Beverton‐Holt dynamic comprehensive model was applied to assess management strategies. The results showed that the growth index（b）of the five fish species ranged from 3.02 to 3.22，exhibiting positive allometric growth.The growth coefficient（K）was 0.39—0.93，so all of them were rapid growth type.The growth performance index（φ'） was 4.02—5.41.The resource exploitation rate of four fish species，except for Cyprinus carpio，were all lower than the exploitation rate which produces maximum sustainable yield，suggesting that the stocks were not over‐exploited. The results of the Bverton‐Hort dynamic comprehensive model showed that the current catchable body length of Cyprinus carpio was relatively smaller，and increasing the catchable body length was more conducive to the recovery of fish resources than reducing the fishing intensity.Optimal resource protection and management would be achieved by setting size‐at‐first‐capture limits at 236 mm for Parabramis pekinensis，165 mm for Carassius auratus，89 mm for Hemiculter leucisculus，86 mm for Pseudobrama simoni，and 490 mm for Cyprinus carpio.In summary，in the Henan section of the the main stream of the Yellow River，the growth rate of the five dominant fish species showes an accelerating trend；Cyprinus carpio resources are overexploited.

Key words: Dominant fish, Population parameters, Resource situation, Henan section of the main stream of the Yellow River