本研究利用一個海洋數值模式的輸出結果來分析進出東海主要通道的傳輸量變化及原因。另外，鰻苗是透過黑潮一路從赤道往北輸送，我們更進一步探討黑潮的年際變動是否會影響臺灣東岸鰻苗的漁獲量。
季節變化部分，各通道的傳輸量變化以夏冬季為主，夏季傳輸量增強，冬季則減弱，而黑潮流經的東臺灣通道與圖克拉海峽的傳輸量變化主要是受到東太平洋往西運動的渦漩所影響。藉由經驗正交函數（EOF）分析，我們發現東海各通道傳輸量變化亦呈現出春秋季的變化型態。年際變化部分，聖嬰年時，臺灣海峽受到東北季風減弱的影響，傳輸量會比反聖嬰年強，另一方面，黑潮流經的東臺灣通道與圖克拉海峽，在聖嬰年時傳輸量會比反聖嬰年弱。
東臺灣通道的黑潮受到年際變動會有強弱的差別，我們將臺灣東岸鰻苗的漁獲量與黑潮做比對，發現兩者有一定的相關性。當1998到2000的反聖嬰年黑潮傳輸量增強時，漁獲量也有增多的情形，然而在1998年黑潮傳輸量達到最強時，漁獲量卻沒有達到最大值，反而是到了2000年時達到最大，推測此原因是在1997聖嬰年黑潮傳輸量減弱時，鰻苗減少，加上過度捕撈使得鰻魚洄游之數量減少所致。

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