Estimation of the population parameters of Trachurus japonicus in the Beibu Gulf based on the LBB method

doi:10.12024/jsou.20210203293

Home > Archive>Volume 31, Issue 1, 2022 >212-222. DOI:10.12024/jsou.20210203293

Estimation of the population parameters of Trachurus japonicus in the Beibu Gulf based on the LBB method
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                        10.12024/jsou.20210203293
                    
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                        WANG MiaodiWANG Miaodi
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, Guangdong, China
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WANG XuehuiWANG Xuehui
South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, Guangdong, China;Key Laboratory of Open-Sea Fishery Development, Ministry of Agriculture and Rural Affairs, Guangzhou 510300, Guangdong, China
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DU FeiyanDU Feiyan
South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, Guangdong, China;Guangdong Provincial Key Laboratory of Fishery Ecology and Environment, Guangzhou 510300, Guangdong, China
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SUN DianrongSUN Dianrong
South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, Guangdong, China;Key Laboratory of Open-Sea Fishery Development, Ministry of Agriculture and Rural Affairs, Guangzhou 510300, Guangdong, China
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WANG YuezhongWANG Yuezhong
South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, Guangdong, China;Key Laboratory of Open-Sea Fishery Development, Ministry of Agriculture and Rural Affairs, Guangzhou 510300, Guangdong, China
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CHEN XinjunCHEN Xinjun
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China
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QIU YongsongQIU Yongsong
South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, Guangdong, China;Key Laboratory of Open-Sea Fishery Development, Ministry of Agriculture and Rural Affairs, Guangzhou 510300, Guangdong, China
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Abstract:

In order to explore the influence of the division of different intervals of Trachurus japonicuson on its population parameters and stock assessment, the length frequency with the data of the fork length of T.japonicus in the Beibu Gulf from 2006 to 2018 was reconstructed, and logistic curve fitting and length Bayesian biomass estimation method (LBB)were used to estimate the first sexual maturity fork length (L₅₀), asymptotic fork length (L_∞),relative natural mortality (M/k),relative fishing mortality (F/k), total mortality (Z/k), optimal fork length-at-first-capture (L_{c_opt}), exploitation rate (E) and other population parameters. The differences in population parameters under different intervals.The results show:The fork length of first sexual maturity ranges from 157 mm to162 mm; The average values of L_∞, M/k, F/k, Z/k, and L_{c_opt} of T. japonicusin intervals length are 248 mm, 1.38, 6.92, 8.28, and 156 mm, respectively; The relative biomass B/B₀ is less than 0.5, and E is greater than 0.5; The results of population parameters estimated by reconstruction length frequency of intervals are different, and the fluctuations are more obvious with the increase of intervals.Studies have shown that the biomass of T. japonicus is relatively low and is in an over-exploited state. At the same time, it is recommended to determine the length of a certain fish interval based on the number of samples, length composition and biological characteristics.

Key words:Trachurus japonicus;Beibu Gulf;intervals;LBB;length frequency;population parameters

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王淼娣,王雪辉,杜飞雁,孙典荣,王跃中,陈新军,邱永松.基于LBB方法估算北部湾竹䇲鱼种群参数[J].上海海洋大学学报,2022,31(1):212-222.
WANG Miaodi, WANG Xuehui, DU Feiyan, SUN Dianrong, WANG Yuezhong, CHEN Xinjun, QIU Yongsong. Estimation of the population parameters of Trachurus japonicus in the Beibu Gulf based on the LBB method[J]. Journal of Shanghai Ocean University,2022,31(1):212-222.

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Received:February 05,2021
Revised:June 09,2021
Adopted:July 10,2021
Online: January 13,2022
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