POSTER Session 3

DEVELOPMENT OF SEASONAL HABITAT SUITABILITY INDICES FOR SPATIAL DISTRIBUTION AND ENVIRONMENTAL PREFERENCES OF MACKEREL IN THE EXCLUSIVE ECONOMIC ZONE OF SOUTH KOREA USING GOCI

Under global warming, the steadily increasing sea surface temperature (SST) severely impacts marine ecosystems, such as the productivity decrease and change in marine species distribution. Recently, the catch of the chub mackerel, scientifically known as Scomber japonicus, one of South Korea’s primary marine resources, has dramatically decreased. In this study, we analyze the marine environment that affects the formation of fishing grounds of Scomber japonicus and develop seasonal habitat suitability index (HSI) models based on various satellite data including GOCI data to continuously manage fisheries resources over Korean exclusive economic zone. The seasonal HSI models are developed using the Arithmetic Mean Model, which showed the best performance. Comparing the developed HSI value with the 2019 catch data, it is confirmed that the HSI model is valid because the fishing grounds are formed in different sea regions by season (East Sea in winter and Yellow Sea in summer) and the high HSI (> 0.6) concurrences to areas with the high catch. In addition, we identified the significant increasing trend in SST over study regions, which is highly related to the formation of fishing grounds of Scomber japonicus. We can expect the fishing grounds will be changed by accelerating ocean warming in the future. Continuous HSI monitoring is necessary to manage fisheries’ spatial and temporal distribution.

Jongkuk Choi, Korea Institute of Ocean Science and Technology (KIOST), Republic of Korea, [email protected]

Doni Nurdiansah, Korea Institute of Ocean Science and Technology (KIOST), Republic of Korea, [email protected]

Deukjae Hwang, Korea Institute of Ocean Science and Technology (KIOST), Republic of Korea, [email protected]

Seon Ju Lee, University of Maryland, USA, [email protected]

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