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http://dx.doi.org/10.7837/kosomes.2017.23.7.909

The Effect of Interannual Variations in Water Temperature on the Yellowtail Catch, Seriola Quinqueradiata, in the Eastern Part of the Korean Peninsula  

Kim, Sang-Woo (Fisheries Resources and Environment Division, East Sea Fisheries Research Institute, NIFS)
Ahn, Ji-Suk (Fisheries Resources and Environment Division, East Sea Fisheries Research Institute, NIFS)
Lee, Yoon (National Institute of Fisheries Science, Oceanic Climate and Ecology Research Division, NIFS)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.23, no.7, 2017 , pp. 909-917 More about this Journal
Abstract
In this study, we investigated the relationship between catches of yellowtail and water temperature at the set net fisheries of Gyeongsangbuk-do (Gyeongbuk) and Gangwon-do (Gangwon) off the east coast of Korea from May-November, 1980-2010. We also analyzed the water temperature and fluctuation of catches during the northward moving period (May-August) and southward moving period (September-November) using NOAA satellite images. Although the total catches fluctuated year by year, catches increased during the southward moving period when the water alongside the coast warmed. Yellowtail catches during the southward period in fall were higher than those during the northward period in spring or summer. The catch when the water temperature decreased was larger in Gyeongbuk than in Gangwon for all periods However, the catch when the water temperature increased was much larger in Gangwon than in Gyeongbuk. This indicates that high summer temperatures (> $25^{\circ}C$) affected the coast of Gangwon, with high water temperature ($20^{\circ}C$) maintained in the region during fall. Therefore, the increased catch in Gangwon was due to longer yellowtail presence caused by increased water temperature.
Keywords
Water temperature; Yellowtail; Fluctuation of catches; Interannual variation; East coast;
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  • Reference
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