North Pacific Anadromous Fish Commission

Technical Report 23

Table of Contents

Distribution and Migration Characteristics of Juvenile Chum Salmon (Oncorhynchus keta) in the Coastal Waters of Gangwon Province, Korea

Authors:
Byoungsun Yoon, Dooho Kim, Jongkuk Choi, and Jukyoung Kim

Abstract:
In order to analyze the distribution characteristics and migration characteristics of juvenile chum salmon, a survey was conducted four times from March to April 2019 using the surfacewater pair trawl in the coastal waters of Gangwon province. The survival rate per unit area of ​​juvenile chum salmon averaged 2,302 individuals/km2 (1,625 to 2,984 individuals/km2), and the stock increased over time. The total length of juvenile salmon was 5.4 ± 1.2 cm in the 1st survey, 5.8 ± 0.9 cm in the 2nd survey, 6.6 ± 0.9 cm in the 3rd survey, 6.8 ± 0.9 cm in the 4th survey and the total length of juvenile chum salmon increased sharply between the 2nd and 3rd surveys. The condition factor of salmon was highest in the 1st survey and showed a tendency to decrease in the 2nd and 3rd surveys but increased in the 4th survey. As a result of analyzing the marked patterns of juvenile chum salmon otoliths, out of a total of 259 individuals, the 3-3-4H pattern accounted for 26 individuals (10.0%) and the 4n-4-2H pattern accounted for 2 individuals (0.8%).

DOI:
https://doi.org/10.23849/npafctr23/4qm-fx6

Citation

Yoon, B., D. Kim, J. Choi, and J. Kim.  2024.  Distribution and migration characteristics of juvenile chum salmon (Oncorhynchus keta) in the coastal waters of Gangwon Province, Korea.  N. Pac. Anadr. Fish Comm. Tech. Rep. 23: 60.  https://doi.org/10.23849/npafctr23/4qm-fx6