1937-1940년 한국 동해안 정어리(Sardinops melanostictus)의 분포 및 어획 특성 연구
A Study on the Distribution and Fishery Characteristics of Sardine Sardinops melanostictus in the East Sea of Korea from 1937 to 1940
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
This study analyzed experimental fishing survey data colleccted from 1937 to 1940 to evaluate the seasonal distribution, environmental preferences, and gear selectivity of sardines Sardinops melanostictus in the East Sea of Korea. Sardine catches were concentrated between May and October, particularly within sea surface temperatures (SST) of 15–25°C. When SST exceeded 23°C, sardine distribution shifted markedly northward, extending into North Korea’s East Sea and indicating distinct seasonal migration patterns. Monthly catch per unit effort (CPUE) of sardines showed a significant relationship with both sea surface and air temperatures, with peak values at 15–17°C SST. This pattern likely reflects the characteristics of fixed gear (gillnets), which depend on fish passing through the gear location rather than on broad environmental conditions. Selectivity analysis revealed that larger mesh sizes captured narrower size ranges, whereas smaller meshes retained broader spectrum of sizes. These findings provide important insights into sardine habitat preferences and the influence of fishing gear effects, offering a historical reference for future assessments of stock variability and adaptive fishery management under changing climatic conditions.
Abstract
This study analyzed experimental fishing survey data colleccted from 1937 to 1940 to evaluate the seasonal distribution, environmental preferences, and gear selectivity of sardines Sardinops melanostictus in the East Sea of Korea. Sardine catches were concentrated between May and October, particularly within sea surface temperatures (SST) of 15–25°C. When SST exceeded 23°C, sardine distribution shifted markedly northward, extending into North Korea’s East Sea and indicating distinct seasonal migration patterns. Monthly catch per unit effort (CPUE) of sardines showed a significant relationship with both sea surface and air temperatures, with peak values at 15–17°C SST. This pattern likely reflects the characteristics of fixed gear (gillnets), which depend on fish passing through the gear location rather than on broad environmental conditions. Selectivity analysis revealed that larger mesh sizes captured narrower size ranges, whereas smaller meshes retained broader spectrum of sizes. These findings provide important insights into sardine habitat preferences and the influence of fishing gear effects, offering a historical reference for future assessments of stock variability and adaptive fishery management under changing climatic conditions.