Title page for etd-0722110-151904


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URN etd-0722110-151904
Author PI-YU HSU
Author's Email Address byshu.tw@yahoo.com.tw
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Department Marine Biotechnology and Resources
Year 2009
Semester 1
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Temporal variation of species composition shrimp beam trawler at the waters off Yunlin, southwestern Taiwan
Date of Defense 2010-01-22
Page Count 101
Keyword
  • Yunlin
  • shrimp beam trawler
  • time series
  • resources
  • Abstract This study aims to analysis the seasonal fluctuation fisheries assemblages and fishing yield by weight and amount of per unit effort using commercial shrimp beam trawlers at the waters off Yunlin, southwestern Taiwan during 1997-2007. In total, 47 sampling cruises, 320 taxa belonging to 205 genera and 102 families were identified. Among these, twelve species occurred greater than 80%. The species number of teleost fish were the most in each sampling. The total fish yield were 3032.9 kg and 304,680 individuals in the sampling period. Shrimps, the target species of the commercial beam trawler, were collected 945.7kg (31.2% of the total fish yield) and 181,050 individuals (59.4% of the total fish yield) , both are the most dominant fish yield among the fishing communities. The teleost fish (865.2 kg, 31.2%) and snails (73,868 individuals, 24.2%) were with the most fish yield in terms of weight and amount, respectively. The dominant species presented a seasonal pattern with a highly oscillation yield in both weight and biomass of the species in the same season each year.
    Thirteen species were recognized as the mainly harvested animals in of seasonal the commercial shrimp beam trawler. This study also showed that the shrimp, Parapenaeopsis hardiwckii, from February to May, and the portunid crab, Portunus sanguinolentus, from August to November in each year had the most production by cluster analysis. Since, the coastal zone at Yunlin were selected for constructing as an industrial park from May, 1998. Therefore in related to the development of the industrial park, to compare the production of 13 mainly harvest animals individually between three industrial developmental stages (pre-development: 1997.1-1998.2, development: 1998.5-2004.12 and post-development: 2005.2-2007.12). The results showed that the production of 3 species, Tanea lineate, Glossaulax didyma and Parapenaeopsis hardiwckii, decreased significantly (p< 0.05), where as of 2 fish species, Arius maculates and Chrysochir aureus, increased. By in large the other species was not remained the same after the construction.
    Advisory Committee
  • Tin-Yam Chen - chair
  • Pan-Wen Hsueh - co-chair
  • Win-Ton Cheng - co-chair
  • Meng-Hsien Chen - advisor
  • Jung-Fu Huang - advisor
  • Files
  • etd-0722110-151904.pdf
  • indicate access worldwide
    Date of Submission 2010-07-22

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