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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 羅敏輝(Ming-Hui Lo) | |
dc.contributor.author | Yi-Ting Hsiao | en |
dc.contributor.author | 蕭伊庭 | zh_TW |
dc.date.accessioned | 2021-05-20T00:52:13Z | - |
dc.date.available | 2020-08-24 | |
dc.date.available | 2021-05-20T00:52:13Z | - |
dc.date.copyright | 2020-08-24 | |
dc.date.issued | 2020 | |
dc.date.submitted | 2020-08-18 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/8331 | - |
dc.description.abstract | 在氣候變遷的影響下,大尺度的洋流改變會影響海表溫度分佈,而洄游性的海洋魚類可能因應溫度改變而遷徙,造成漁業資源的分佈變化。為找出海洋表面溫度之變化是否在時間及空間上影響鮪魚捕獲率,本研究選擇黃鰭鮪魚(Yellowfin tuna)以及長鰭鮪魚(Albacore tuna)做為研究魚種,使用資料為美洲熱帶鮪魚委員會(Inter-American Tropical Tuna Commission, IATTC)及中西部太平洋漁業委員會(Western and Central Pacific Fisheries Commission, WCPFC)之延繩釣鮪魚捕獲資料。研究時間及空間為1971 ~ 2016 年,緯度20°N~20°S,經度105°E~75°W,分析中太平洋聖嬰事件與東太平洋聖嬰事件下,兩種鮪魚單位努力漁獲量(catch per unit effort, CPUE)的空間和時間變化。 根據氣候模式 CGCMs的模擬,在全球暖化下中太平洋聖嬰事件的頻率會增加,使得海表面溫度上升的區域有別於過往的典型聖嬰現象,而溫度上升對於鮪魚的初期生長有很大的影響,其中溫度上升有利於黃鰭鮪魚的在西中太平洋中主要的產卵場,因此聖嬰事件有利於黃鰭鮪魚魚群量的增加。反之,太平洋中部暖水區的延伸可能會減少長鰭鮪魚的產卵場,且海平面溫度的升高將降低其增添量,因此聖嬰事件不利於長鰭鮪魚魚群量的增加。 研究結果顯示在中太平洋聖嬰事件下,長鰭鮪魚及黃鰭鮪魚CPUE之重心相較於正常年有西南向的移動; 而在東太平洋聖嬰事件下,長鰭鮪魚CPUE之重心相較於正常年有西南向的移動,黃鰭鮪魚有東南向的移動。 探討中太平洋聖嬰事件對於鮪魚捕獲率分佈是否有影響,在未來中太平洋聖嬰事件的發生頻率隨著氣候變遷而有增加的情況下,對於漁業管理以及海洋資源的永續發展將有很大的幫助。 | zh_TW |
dc.description.abstract | This study selected Yellowfin tuna and Albacore tuna as the research species to explore whether the change in sea surface temperature affects the spatiotemporal variations in the tuna catch rates. We used long-line tuna fishing data from the Inter-American Tropical Tuna Commission (IATTC) and Western and Central Pacific Fisheries Commission (WCPFC). With global warming, climate models CGCMs project an increasing trend of central Pacific El Niño events, where the changes in sea surface temperature are different from the typical eastern Pacific El Niño. Such environmental changes influence the early life stage of tunas. The increase in temperature is beneficial to the main spawning ground of yellowfin tuna in the Western Central Pacific Ocean, the El Nino event may cause the increase in the population of yellowfin tuna. Conversely, the extension of the warm water in the Central Pacific Ocean may reduce the spawning grounds of albacore tuna, the El Nino event may cause the decrease in the population of albacore tuna. Results show that under the Central Pacific El Niño events, the gravity center of catch per unit effort for Albacore tuna and Yellowfin tuna have a southwestward movement compared to normal years. Under the East Pacific El Niño events, the gravity center of catch per unit effort for Albacore tuna has a southwestward movement compared to the normal year, while the Yellowfin tuna has a southeastward movement. Consequently, it is crucial to investigate how such climatic periodicity will impact the distribution of catch rate and abundance of tunas, which will greatly help fisheries management and sustainable development of marine resources. | en |
dc.description.provenance | Made available in DSpace on 2021-05-20T00:52:13Z (GMT). No. of bitstreams: 1 U0001-0308202019242600.pdf: 7537802 bytes, checksum: e9738f77419709b34633babf6246879e (MD5) Previous issue date: 2020 | en |
dc.description.tableofcontents | 摘要 I ABSTRACT II 第壹章 緒論 1 1.1 研究背景與動機 1 1.2 文獻回顧 2 1.3 研究假設 5 1.4 研究目的 5 第貳章 資料與方法 6 2.1 研究時間、地點及事件 6 2.2 資料來源 7 2.3 研究魚種 8 第參章 研究結果 11 3.1 1970 ~ 2016 年間,CPUE平均分佈圖 11 3.2 1970 ~2017 年,每六年間CPUE分佈圖 12 3.3 計算研究魚種所受溫度影響之延遲時間 15 3.4 CPUE之年際趨勢與海洋表面溫度距平值之比較 17 3.5 正常年及聖嬰、反聖嬰事件下,7月至隔年6月,海洋表面溫度距平與CPUE距平之分佈(經延遲時間之處理後) 20 3.6 正常年及聖嬰、反聖嬰事件下,9月至隔年2月,海洋表面溫度距平與CPUE距平之分佈(經延遲時間之處理後) 26 3.7 中太平洋聖嬰事件及東太平洋聖嬰事件下,9月至隔年2月,CPUE分佈圖與重心位置 32 3.8 中太平洋及東太平洋聖嬰事件下,CPUE大於25百分位分佈圖 38 中太平洋及東太平洋聖嬰事件下,海洋表面溫度距平與CPUE距平 40 3.9 之相關圖 40 3.10 每月份CPUE和海洋表面溫度之相關係數 43 3.11 CPUE之縱向重心與SOI數值之比較圖 44 3.12 CPUE之緯向重心與SOI數值之比較圖 50 3.13 近年事件驗證 55 (一) 1997~1998 東太平洋聖嬰事件 55 (二) 2009~2010 中太平洋聖嬰事件 58 第四章 結果討論 62 4.1 CPUE空間變化對應海洋表面溫度變化 62 4.2 豐度變化對應海洋表面溫度變化 62 4.3 海洋表面溫度對研究魚種CPUE影響顯著的月份與產卵季節之關聯 63 第伍章 結論與未來研究建議 64 參考資料 66 附錄 69 | |
dc.language.iso | zh-TW | |
dc.title | 中太平洋聖嬰事件與東太平洋聖嬰事件對於太平洋熱帶鮪魚捕獲率分佈的影響 | zh_TW |
dc.title | Different Types of ENSO Impact on the Distribution of Catch Rate of Two Tropical Tunas | en |
dc.type | Thesis | |
dc.date.schoolyear | 108-2 | |
dc.description.degree | 碩士 | |
dc.contributor.coadvisor | 王慧瑜(Hui-Yu Wang) | |
dc.contributor.oralexamcommittee | 莊振義(Jehn-Yih Juang), 曾于恒(Yu-Heng Tseng) | |
dc.subject.keyword | 中太平洋聖嬰,東太平洋聖嬰,鮪魚捕獲率,魚場分佈,氣候變遷, | zh_TW |
dc.subject.keyword | Central Pacific El Niño–Southern Oscillation,East Pacific El Niño–Southern Oscillation,catch rate of tuna,fishing ground distribution,climate change, | en |
dc.relation.page | 72 | |
dc.identifier.doi | 10.6342/NTU202002310 | |
dc.rights.note | 同意授權(全球公開) | |
dc.date.accepted | 2020-08-19 | |
dc.contributor.author-college | 理學院 | zh_TW |
dc.contributor.author-dept | 氣候變遷與永續發展國際學位學程 | zh_TW |
顯示於系所單位: | 氣候變遷與永續發展國際學位學程(含碩士班、博士班) |
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