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http://dx.doi.org/10.5657/KFAS.2022.0721

Ecological Characteristics and Biomass of White Croaker Pennahia argentata Population in the South Sea of Korean Peninsula  

Jeon, Bok Soon (Fisheries Resources Research Center, National Institute of Fisheries Science)
Lee, Hae Won (Distant Water Fisheries Resources Research Division, National Institute of Fisheries Science)
Kang, Sukyung (Fisheries Resources Research Center, National Institute of Fisheries Science)
Lee, Seung Jong (Fisheries Resources Research Center, National Institute of Fisheries Science)
Oh, Chul-Woong (Department of Marine biology, Pukyong National University)
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.55, no.5, 2022 , pp. 721-729 More about this Journal
Abstract
We investigated the ecological characteristics and biomass of white croaker Pennahia argentata population in the South Sea of Korea using catch data from Danish seins fishery and biological data from 2018 to 2020. Survival rate (S), which was estimated using Pauly method (1984) was 0.361 per year, and the instantaneous coefficient of total mortality (Z) was 1.019 per year. The instantaneous coefficient of natural mortality (M) and that of fishing mortality (F) were estimated as 0.351 and 0.668 per year, respectively. At first capture, age was estimated to be 1.19 years and length at this age was 18.7cm. The annual biomass was estimated with a biomass-based cohort analysis using annual catch data between 1997-2020 in Korean water. The biomass of the white croaker declined sharply from 4,000 tons in 1999 to the lowest level of approximately 1,000 tons in 2004. Post 2004, the biomass started to increase gradually and reached approximately 7,000 tons. The amount of resources was 35.7%, 34.8%, and 16.5% at age one, two, and three years, respectively, and 86.9% of all captured white croaker individuals belonged to the age group of 1-3 years.
Keywords
White croaker; Pennahia argentata; Ecological characteristics; Age at first capture; Biomass-based cohort;
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