[논문]기후변화와 동해안에서의 명태 자원의 고갈

Kim, Jong-Gyu; Kim, Joong-Soon

doi:10.5668/jehs.2018.44.3.259

기후변화와 동해안에서의 명태 자원의 고갈
Climate Change and Depletion of Walleye Pollock Resources in the East Sea 원문보기

韓國環境保健學會誌 = Journal of environmental health sciences, v.44 no.3, 2018년, pp.259 - 266

Kim, Jong-Gyu (Faculty of Food and Health Sciences, Keimyung University) , Kim, Joong-Soon (Department of Industrial and Management Engineering, Keimyung University)

Abstract ▼ AI-Helper

Objectives: Considered the "national fish" in Korea, the walleye pollock (Gadus chalcogrammus) has disappeared in the East Sea (Sea of Japan), a main habitat and fishing ground for the species. The reason for the disappearance is still a matter of controversy. This study was performed to investigate the long-term relationship between the walleye pollock catch and various meteorological and oceanographic factors in these waters. Methods: Fishery data on walleye pollock and data on meteorological and marine environmental factors over the 30 years (1981-2010) were obtained from the official national database. Time series analysis and correlation and regression analyses were performed to study the relationships. Results: Both air temperature and sea surface temperature in the East Sea rose over these 30 years, and the latter became more prominent. Salinity and dissolved oxygen showed a tendency to decrease while concentrations of nutrients such as nitrite nitrogen and nitrate nitrogen showed an increasing tendency. Sea surface temperature, air temperature, atmospheric pressure, and wind grade were negatively correlated with the catch size of walleye pollock (p<0.05), but salinity was positively correlated (p<0.001). Conclusion: The results of this study indicate that climate change, especially ocean warming, affected the habitat of walleye pollock. The results also indicate that lower sea surface and air temperatures, milder wind grade, and higher salinity were preferred for the survival of the fish species. It is necessary to pay attention to changes of the ocean ecosystem in terms of environmental pollution as well as seawater temperature.

주제어

표/그림 (6)

그림 Fig 1. Changes in the catches of walleye pollack in offshore fisheries of Korea during the past three decades (Source of data: Statistics Korea, Ministry of Oceans and Fisheries).
그림 Fig. 2. The price of walleye pollock at every ten year in South Korea (Source of data: Ministry of Oceans and Fisheries).
그림 Fig. 3. Changes in the sea surface temperature and airt emperature of East Sea during the past three decades.
표 Table 1. Results of correlation analysis between the meteorological and oceanographic factors
그림 Fig. 4. Results of regression analysis between the catch of walleye pollock and the meteorological factors of East Sea.
그림 Fig. 5. Results of regression analysis between the catch of walleye pollock and the oceanographic factors of East Sea

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가설 설정

However, few studies on the climate change of Korea and its effects on the catch of walleye pollock have been reported. In this study, we investigated the long-term effects of climate change on the catch of walleye pollock in South Korea. This was studied by finding the relationship between the main meteorological and the oceanographic factors of East Sea, and also annual catch size of walleye pollock over the past three decades.

제안 방법

In this study, we investigated the long-term effects of climate change on the catch of walleye pollock in South Korea. This was studied by finding the relationship between the main meteorological and the oceanographic factors of East Sea, and also annual catch size of walleye pollock over the past three decades.

대상 데이터

The nutrients such as nitrogen and phosphorous of sea water, which are regarded as the cause of eutrophication of sea were also selected. The data was extracted by the institute six times a year from 1961 to the present, observations for 25 points, 207 lines, and 14 standard water layers. The data of wind grade, air temperature, and atmospheric pressure of the East Sea were also collected from the observed data of Jeongseon Marine Survey.

참고문헌 (30)

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원문보기 상세보기
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원문보기 상세보기
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상세보기
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상세보기
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