碩士 / 國立中山大學 / 經濟學研究所 / 102 / Tuna is one of the species of high economic value. The annual catches of tuna in Taiwan can be as high as about 400,000 tons, and the annual production value is of 40 billion NTD. In recent years, due to the fishing around the world, it has resulted in over-exploitation of tuna resources. Consequently, some international organizations and associations have got marine resources of tuna under regulation and management. As a result, Taiwan is subject to the annual tuna fishing catch quotas according to international norms. Therefore, in addition to the description of the current state of Taiwan’s tuna fisheries, this study analyzed the data about the monthly catches of five categories of tuna in Taiwan in an attempt to establish the assessment model for the five categories of tuna for comparison. It was expected to develop an effective catches assessment model constructed with simplified influencing factors for application.
The research period was from January 1999 to the end of December, 2010. This study used the monthly statistical data of 144 months in 12 years. The research targets included albacore tuna, bigeye tuna, yellowfin tuna, southern bluefin tuna and other tunas. Meanwhile, this study applied ARMA model in the construction of the catches assessment model and test of seasonal factors and El Nino (La Nina) effect. Finally, the empirical study found that it is feasible to use ARMA model in the assessment of fishing catches. ARMA(1,2) model can be used to assess the albacore tuna and bigeye tuna, AR(2) model can be used to assess the yellowfin tuna, ARMA(2,4) model can be used to assess the southern blufin tuna and ARMA(4,4) model can be the most appropriate interpretation model for the logarithmetics catches. In addition, it was also found that climatic changes have no significant impact on the catches of various tunas. Finally, the seasonal impact on the catches of five categories of tunas is apparent, and seasonable factors can be regarded one of the key factors influencing the catches of albacore tuna, bigeye tuna , and southern bluefin tuna .
| Identifer | oai:union.ndltd.org:TW/102NSYS5389005 |
| Date | January 2014 |
| Creators | Chi-Chueh Hsieh, 謝琪雀 |
| Contributors | Shan-Non Chin, 曾憲郎 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 75 |
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