衛星遙測海面溫度應用於黃鰭鮪漁場變動之研究

A Study on the Variation of Yellowfin Tuna Fishery Ground from Satellite-derived Sea Surface Temperatures

翁筱郡(Hsiao-Chun Weng) ； 郭南榮(Nan-Jung Kuo) ； 何宗儒(Chung-Ru Ho) ； 陳俊德(Chun-Te Chen)

《航測及遙測學刊》 10卷2期 (2005/06) Pp. 139-158

https://doi.org/10.6574/JPRS.2005.10(2).2

摘要

本文利用1996至2001年NOAA衛星酬載之高解析度輻射計(Advanced Very High Resolution Radiometer, AVHRR)之表水溫資料及太平洋共同體秘書處(The Secretariat of the Pacific Community, SPC)之鮪釣漁獲資料，探討聖嬰／反聖嬰對熱帶太平洋及澳洲沿岸黃鰭鮪鮪釣漁況之影響。本文主要利用經驗模態分解法(Empirical Mode Decomposition, EMD)，取出與聖嬰／反聖嬰相關之本質模態函數(Intrinsic Mode Function, IMF)進行分析。研究結果顯示當聖嬰現象發生時中西太平洋之黃鰭鮪釣獲率呈現降低之趨勢，且緯向漁場重心向西移動，反聖嬰時則反之。至於東太平洋海域黃鰭鮪釣獲率受聖嬰／反聖嬰影響較中西太平洋明顯，但緯向漁場重心則無明顯變動。澳洲沿岸因位於陸地邊緣且離赤道較遠，黃鰭鮪釣獲率及緯向漁場位置變動受聖嬰／反聖嬰影響並不明顯。

關鍵字

表水溫 ； 聖嬰／反聖嬰現象 ； 太平洋 ； 黃鰭鮪 ； 經驗模態分解法 ； 本質模態函數

並列摘要

In this study the NOAA satellite AVHRR Sea Surface Temperature data and the Secretariat of the Pacific Community (SPC) longline fishery data from 1996 to 2001 are analyzed to discuss the effect of the El Niño/La Niña events on the longline fishery of yellow fin tuna in the Pacific Ocean. The Empirical Mode Decomposition (EMD) method is used to retrieve Intrinsic Mode Function (IMF) related to the El Niño/La Niña events. The results indicate that the evolution of El Niño/La Niña event causes the decreasing/increasing of the hook rate and westward/eastward movement of the Catch Per Unit Effort (CPUE) zonal center of the yellow fin tuna around the Equatorial Pacific. Meanwhile, a nearly simultaneous response between El Niño/La Niña event and yellowfin tuna longline fishery occurs in the eastern part of the Equatorial Pacific, while about 7-9 months lag for yellow fin tuna fishery in the western Pacific. We also find that the El Niño/La Niña event show s no clear influence on the yellow fin tuna fishery in the Southwest Pacific near Australia.

並列關鍵字

Sea Surface Temperature ； El Niño/La Niña event ； Yellowfin tuna ； Pacific Ocean ； Empirical Mode Decomposition ； Intrinsic Mode Function.