강원도 남대천에서 방류된 연어(Oncorhynchus keta) 치어의 연안 분포 및 이동 특성
Coastal Distribution and Movement of Juvenile Chum Salmon Oncorhynchus keta Released in Namdaecheon, Gangwon-do, Korea
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
To analyze the distribution and migration patterns of chum salmon fry, survey was conducted four times from March to April 2020 using a surface water pair trawl in the coastal waters of Gangwon Province. The number of fry per unit area of chum salmon fry averaged 2,302 Inds./km2 (1,625 to 2,984 Inds./km2). The number of fry per unit area, total length and condition factor of caught fry under water temperatures above 12°C significantly increased compared to those under below 12°C (P<0.05). Analysis of the otolith markers showed that fry released in Namdaecheon and Wangpicheon moved north along the coast and were captured off the coast of Sokcho. The results of this study provide key information on the initial coastal recruitment, distribution, migration, and biological indicators of chum salmon fry released in the Namdaecheon area, and can be used to determine the timing of salmon release in the area.
Abstract
To analyze the distribution and migration patterns of chum salmon fry, survey was conducted four times from March to April 2020 using a surface water pair trawl in the coastal waters of Gangwon Province. The number of fry per unit area of chum salmon fry averaged 2,302 Inds./km2 (1,625 to 2,984 Inds./km2). The number of fry per unit area, total length and condition factor of caught fry under water temperatures above 12°C significantly increased compared to those under below 12°C (P<0.05). Analysis of the otolith markers showed that fry released in Namdaecheon and Wangpicheon moved north along the coast and were captured off the coast of Sokcho. The results of this study provide key information on the initial coastal recruitment, distribution, migration, and biological indicators of chum salmon fry released in the Namdaecheon area, and can be used to determine the timing of salmon release in the area.