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研究報告

更新日期: 2015-02-09
點閱數: 1,191

太平洋主要旗魚類資源指標變動與環境因子關係研究

年度 2013
計劃名稱 太平洋主要旗魚類資源指標變動與環境因子關係研究
中文摘要 本研究以加入環境因子的GAM模型,分析2001-2011台灣鮪延繩釣漁獲資料,進行太平洋劍旗魚和紅肉旗魚CPUE標準化分析,探討劍旗魚和紅肉旗魚CPUE變動與環境因子的關係。影響北太平洋劍旗魚CPUE變動的環境因子有海水面高度異常、南北向風速、SST、南方震盪指數、太平洋年代震盪指數和東西向風速;南太平洋劍旗魚部分則是葉綠素濃度、SST、海水面高度異常和風速。影響北太平洋紅肉旗魚CPUE變動的環境因子有南北向風速、SST、太平洋年代震盪指數和南方震盪指數;南太平洋紅肉旗魚部分則是SST、葉綠素濃度、南方震盪指數、海水面高度異常和南北向風速。其中環境因子的變動受到南方震盪和太平洋年代震盪的影響,在太平洋年代震盪指數為正值,對應於南方震盪指數是負值時,劍旗魚和紅肉旗魚的CPUE較高。
英文摘要 The catch and effort data of swordfish and striped marlin for the Taiwanese tuna longline fishery in the Pacific Ocean were collected for 2001-2011. GAMs with environmental factors included are applied to standardize the CPUEs of swordfish and striped marlin. For swordfish, The GAMs results showed that sea level anomalies, meridional wind speed, SST, SOI, PDO index and zonal wind speed were important factors in explaining the variance in CPUE in the North Pacific, and chlorophyll a concentration, SST, sea level anomalies and wind speed were important in the South Pacific. For striped marlin, meridional wind speed, SST, PDO index and SOI were important factors in explaining the variance in CPUE in the North Pacific, and SST, chlorophyll a concentration, SOI, sea level anomalies and meridional wind speed were important in the South Pacific. These environmental factors related to ENSO and PDO revealed that swordfish and striped marlin are in a higher CPUE level as PDO index positive and SOI negative.
計畫編號 102農科-11.1.1-漁-F3(4)
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