Evaluation of Growth Characteristics and Resource Status of Dominant Fish Species in Henan Section of the Main Stream of the Yellow River

ZHANG Qingqing; HE Haizhan; FANG Dongdong; MA Chao; WANG Zhaoping; YANG Hui; HUI Jun

doi:10.15933/j.cnki.1004-3268.2025.10.014

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.