碩士 / 臺灣大學 / 海洋研究所 / 98 / Leptocephalus is the larvae of the Superorder Elopomorpha which consist of four orders: Anguilliformes, Saccopharyngiformes, Elopiformes, and Albuliformes. Leptocephali are distinguished from other fish larvae by their extremely compressed and transparent body; they are also very different from their adult fish. Since leptocephali are not well described in the Taiwan area, this study aim to use barcoding to identify them in order to give better descriptions. For the morphological and COI identifications, a total of 528 leptocephali were collected by IKMT, shrimp trawl, and ring net in July 2007, June 2008, May-July 2009, and July 2009. Based on the morphological characters, 142 specimens could be classified into 32 types, and further identified to 22 taxa, including 6 families, 3 subfamilies, 10 genera, and 3 species, whereas, barcoding identified the specimens to 24 taxa, including 5 families, 3 subfamilies, 7 genera, and 9 species. Because leptocephali lack significant morphological characters, most of the specimens could only be identified to the family or genus level by morphology. DNA barcoding provides an efficient way to identify fish species: the number of species identified by the barcoding approach is more than that by morphology. It can also evaluate the morphological identification of fish larvae and improve the accuracy of identification. However, the BOLD database is not perfect as it still hasn’t included all the eel species. Therefore, it is necessary to make the COI database more complete for adult eels so that the barcoding identification of leptocephali can be carried out more thoroughly.
| Identifer | oai:union.ndltd.org:TW/098NTU05279017 |
| Date | January 2010 |
| Creators | Su-Chen Tsai, 蔡素甄 |
| Contributors | Kwang-Taso Shao, Chi-Lu Sun, 邵廣昭, 孫志陸 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 84 |
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