Title page for etd-0708110-142237


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URN etd-0708110-142237
Author Shang-chen Yang
Author's Email Address No Public.
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Department IMA
Year 2009
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Fleet Dynamics of Taiwanese Distant Water Longline Fisheries in Indian Ocean
Date of Defense 2010-06-24
Page Count 89
Keyword
  • Geographical Information System
  • CPUE
  • Indian Ocean
  • Tropical Tuna
  • Abstract Tunas are the ocean highly migratory species, Taiwan is the top countries of the
    tropical tunas fishery in the Indian Ocean, and the tropical tunas are the main target
    species of our country in Indian Ocean. There were no systematic arrangement of
    large-scale tuna longline fishery in the past. While assessing the resource assessment,
    there are only few information included and discussed .The Purpose of this research
    based on the large-scale fishing vessels’ logbooks, and analyzed the catch, CPUE and
    fishing effort of tropical tuna longline vessels with geographical information system.
    Discuss the dynamic patterns of tropical tuna vessels, and try to research the factors
    influencing the vessels activities.
    The research focus on the whole Indian Ocean, and utilizes the geographical
    information system to analyze and research CPUE from 1970 to 2007(38 years) with
    annual tropical tuna catch. Then, select the steady times of the fishery activities from
    1999 to 2003 and carry on the analysis of catch data. Second, choose the first 20
    fishing vessels of annual Yellow-fin tunas and Big-eye tunas with largest catch in this
    period, regard these as the representative researching vessels. According to the
    navigation route of each vessel, the results of the analysis are derived: 4 patterns of
    Yellow-fin tuna, 3 patterns of Big-eye tuna. On the whole, there are 5 routes of
    Taiwan fishing boat of tuna longline fishing vessels in the Indian Ocean: 1. The
    fishing vessels go back to the equator across Arabian Sea from the equator. 2. The
    fishing vessels go back to the equator across southern Indian Ocean from Arabian Sea.
    3. The fishing vessels go back to the equator across the Bay of Bengal from the
    equator. 4. The fishing vessels go back to the equator across the southern Indian
    Ocean from the equator and stay near the equator during the whole year. Finally,
    conclude that tuna longline fishery of Taiwan target tropical tunas in the Indian Ocean
    are dominated by factors such as international fish price, climate, walrus and the
    relationship with fishery cooperative countries, etc.. These factors lead to the 5 kinds
    of vessel dynamic ways in the Indian Ocean.
    Advisory Committee
  • Chih-Yuan Chen - chair
  • Chen Chao-ching - co-chair
  • Shui-Kai Chang - advisor
  • Ruo-Shan Tseng - advisor
  • Files
  • etd-0708110-142237.pdf
  • indicate accessible in a year
    Date of Submission 2010-07-08

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