碩士 / 國立海洋大學 / 漁業科學系碩士在職專班 / 91 / Abstract
The family Scombridae is composed of 15 genera and 50 species of mostly epipelagic marine fishes in the world, including mackerels, Spanish mackerels , bonitos , and tunas. While, there are 11 genera and 22 species of scombrids in Taiwan. They are economically important fishes around the world .
Conventionally, the systematic taxonomy of Scombridae is based on morphology and osteology. In this study, the complete cytochrome b gene sequences (1140 bp) were used to infer the phylogenetic relationships of Scombridae in the coastal waters of Taiwan. All of the 22 and 4 outgroup sequences were subjected to Neighbor-joining, and Maximum parsimony methods. The results of analysis suggest that：(1) Sarda and Thunnus share a common ancestor , so Sarda belongs to Thunnini.(2) Thunnus is a monophyletic group. Axis+Euthynnus +Katsuwonus is monophyletic , too. The genetic distances between Euthynnus and Katsuwonus is very short , so it seems to be reasonable for combining these genera to one genus. (3) Grammatorcynus is close to outgroup , so it is a primitive species of scombrid. It should be categorized to Scombrini . (4) Acanthocybium and Gymnosarda share a common ancestor, and they are the sister groups of Sardini. Acanthocybium belongs to Sardini. (5) The classification of Sardini category is unstable , and the members of Sardini need to be re-evaluated for their position in Scombridae.
| Identifer | oai:union.ndltd.org:TW/091NTOU1451026 |
| Date | January 2003 |
| Creators | Chang, Hong-Wen, 張宏文 |
| Contributors | Huang, Bao-Quey, Jian, Chun-Tan, 黃寶貴, 簡春潭 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 68 |
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