| Summary: | 碩士 === 國立臺灣師範大學 === 地球科學系 === 105 === The ocean environment has changed in recent decades under the impacts of climate change. In the North Atlantic Ocean, the long-term trend of ocean temperature and salinity is increasing, whereas trend of chlorophyll-a concentration is decreasing. Owing to the changes in the living environment, we wonder how the environmental changes influence the marine organisms and how marine organisms adapt to the changes of environment. In this study, we use the global capture production data from FAO and the assimilation data from SODA POP to investigate the potential connections between the ocean environmental changes and the selected Atlantic fishes: Atlantic Cod, Atlantic Halibut, Atlantic Salmon, and Atlantic Bluefin Tuna during the period 1991-2010 based on the empirical orthogonal function analysis. Our results indicate a significant negative correlation between the ocean temperature and the capture productions of Atlantic Cod and Atlantic Salmon over the past two decades. The relationship between the capture productions of Atlantic Cod and Atlantic Bluefin Tuna and the ocean salinity shows significant negative correlation. Change of chlorophyll-a concentration may also affect the capture productions of Atlantic Halibut, Atlantic Salmon and Atlantic Bluefin Tuna. In addition, the variation of ocean salinity and temperature may cause Atlantic Cod and Atlantic Salmon shift their living depths to a deeper level, respectively.
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