Title page for etd-0217113-212412


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URN etd-0217113-212412
Author Tzu-hao Kuo
Author's Email Address No Public.
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Department Biological Sciences
Year 2012
Semester 1
Degree Master
Type of Document
Language English
Title Population Genetic Structure of Cypselurus poecilopterus in the Waters off Taiwan Based on Cytochrome b Sequences
Date of Defense 2013-01-31
Page Count 49
Keyword
  • South China Sea warm current
  • cytochrome b
  • Cypselurus poecilopterus
  • Kouroshio
  • South China Sea surface current
  • Abstract Cypselurus poecilopterus is a highly migratory fish and is widely distributed in the warm waters of the Indo-Pacific Ocean. It is a common flying fish of miniature size that resides in the waters near Taiwan. Previous studies suggested that C. poecilopterus around Taiwan come from more than one source, and the winter population should be from single source. In this study, I examined the genetic structure ofC. poecilopterus populations in the waters off Taiwan using mitochondrial cytochrome b sequences. A total of 85 individuals were collected from set nets in Pingtung, Taitung, Hualien, and Ilan. In total, I found 68 haplotypes of cytochrome b sequences, of which the nucleotide length was 1,000 bp, including 102 informative sites. The mean genetic distance was 0.9%. Two major clades were revealed in the phylogenetic trees and the TCS haplotype network. Clade 1 includes the summer and winter haplotypes, Clade 2 includes only the summer haplotypes. The relative positions of the haplotypes in the clades corresponded to the current flow directions of summer and winter. The haplotypes of Clade 1 may come from the South China Sea and migrate with the South China Sea surface current and South China Sea warm current. The haplotypes of Clade 2 may come from the waters of the East Philippines and migrate with the Kouroshio. Based on the AMOVA results, the variation among clades (63.7%) was significantly greater than the variations within clades (36.3%), suggesting that the two populations have significant genetic differentiation. Therefore, the results support that C. poecilopterus around Taiwan come from more than one source.
    Advisory Committee
  • Hin-Kiu Mok - chair
  • Shui-Kai Chang - co-chair
  • Hsueh-Wen Chang - advisor
  • Files
  • etd-0217113-212412.pdf
  • Indicate in-campus at 1 year and off-campus access at 3 year.
    Date of Submission 2013-02-17

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