Estimation of Growth and Mortality Parameters of Croaker Collichthys lucidus in Inshore Waters of Southern Zhejiang Province
FAN Xiaoyue1, WANG Yin2, LI Jianhua2,3,4, GAO Chunxia2,3,4
1. College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306, China; 2. College of Marine Living Resource Sciences and Management, Shanghai Ocean University, Shanghai 201306, China; 3. National Engineering Research Center for Oceanic Fisheries, Shanghai 201306, China; 4. Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai 201306, China
Abstract:The inshore waters of southern Zhejiang Province is an important fishing area in China, andcroaker Collichthys lucidus as an abundant species in these waters is of great significance to assess the fishery resources of this stock. The body length was measured in croaker C. lucidus sampled in the southern coastal waters(N 27°0′—29°0′, E 120°0′—123°0′)of southern Zhejiang Province from 2015 to 2019, by a single-ship bottom trawl to estimate growth, mortality parameters and resource changes of croaker C. lucidus by Pauly′s empirical formula and Beverton-Holt dynamic model (B-H model). The results showed that the von Bertalanffy growth parameters were found to be L∞=168 mm, K=0.96, and t0=-0.17 year. The natural mortality calculated was to be M=0.90 by Pauly′s empirical equation, and the total mortality of Z=3.66 estimated by length-converted catch curve, with the fishing mortality of F=2.76. The current exploitation rate was shown to be 0.75, indicating that the stock is over-exploited. The Beverton-Holt dynamic model revealed that the minimum exploitation size for C. lucidus was 134.40 mm,and the exploitation rate 0.7,which will contribute to the sustainable development of the recruitment population of C. lucidus. The findings provide basic support materials for the management of fishery resources in this area, and will help managers to further optimize the exploitation policy.
范笑悦, 王寅, 李建华, 高春霞. 浙江南部近海棘头梅童鱼生长和死亡参数估算[J]. 水产科学, 2025, 44(4): 659-665.
FAN Xiaoyue, WANG Yin, LI Jianhua, GAO Chunxia. Estimation of Growth and Mortality Parameters of Croaker Collichthys lucidus in Inshore Waters of Southern Zhejiang Province. Fisheries Science, 2025, 44(4): 659-665.
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