Title page for etd-0822108-175356


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URN etd-0822108-175356
Author Wan-chun Chang
Author's Email Address No Public.
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Department Marine Biotechnology and Resources
Year 2007
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Spatiotemporal distribution of hydromedusae in relation to hydrography in the waters surrounding Taiwan
Date of Defense 2008-06-30
Page Count 153
Keyword
  • hydrography
  • hydromedusae
  • spatiotemporal distribution
  • Abstract Temporal and spatial distribution in species composition and abundance of hydromedusae in relation to hydrographic variables in the waters surrounding Taiwan were investigated from February to November, 2004. A total of 101 species belonging to 65 genera and 34 families hydromedusae were identified, with the mean abundance of 557 ± 90 inds./1000m3. The abundance of hydromedusae showed no significant seasonal change but generally was higher in spring and fall, and lower in summer. The eight dominant species were Aglaura hemistoma、Solmundella bitentaculata、Eutima levuka、Liriope tetraphylla、Aglantha elata、Laodicea indica、Rhopalonema velatum and Sminthea eurygaster, which together contributed 85% of the total hydromedusae.
    Hydromedusae showed higher abundance in the waters northwest off
    Taiwan, while the species number and diversity were higher in the waters east and south off Taiwan. Hydromedusa communities showed significant difference among water masses, higher abundance in China Costal Current, meanwhile higher species number and diversity in Kuroshio Current. Different dominant species showed different distribution patterns. The total abundance of hydromedusae showed no significant correlation with temperature or salinity, but were positive correlated with zooplankton abundance, while species richness were negatively correlated with zooplankton abundance. Different dominant hydromedusae species showed different correlationships with environmental factors; Aglaura hemistoma showed significant positive correlation with salinity, but Solmundella bitentaculata showed significant negative corelation with salinity. The correlationship between the abundance of each dominant species and evironmental factors varied seasonally.
    Advisory Committee
  • Ming-An Lee - chair
  • Kwee-siong Tew - co-chair
  • Chih-hao Hsieh - co-chair
  • Wen-Tseng Lo - advisor
  • Files
  • etd-0822108-175356.pdf
  • indicate access worldwide
    Date of Submission 2008-08-22

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