碩士 / 國立高雄海洋科技大學 / 漁業生產與管理研究所 / 100 / In this study, Variations of fishing conditions of two set-net fishing grounds in the eastern and southwestern Taiwan, Chiafong and Manfong, based on variable factors such as catch composition, catch per unit effort (CPUE), fishing condition, fishing season, and fishing period in seven years from 2001 to 2007 were investigated and analyzed. The results of the preliminary research are shown as follows:
1. There were 12 common dominant species at two fishing grounds: 5 species of Scombridae (including, Acanthocybium solandri, Scomberomorus commerson, Auxis rochei, Auxis thazard, Euthynnus affinis); 1 species of Carangidae (Seriola dumerili); 6 other species (including, Tylosurus acus melanotus, Sphyraena japonica, Sphyraena forsteri, Dasyatis akajei, Aluterus monoceros and Istiophorus platypterus).
2. The Chiafong set-net Fishing ground’s CPUEs were higher than those of Manfong’s in 7 consecutive years. The Chiafong and the Manfong set-net fishing grounds had two peak fishing seasons from November to January as well as from March to May and one peak fishing season from March to June, respectively.
3. The Index of Diversity and the Index of Evenness of the Manfong set-net Fishing grounds which were higher than those of the Chiafong’s should be attributed to more dominant species in the former’s fish fauna. In addition, the catches obviously different among dominant species at the Chiafong were also significant.
4. The first dominant species of the Chiafong and the Manfong set-net fishing grounds were Auxis thazard and Seriola quinqueradiata, respectively. The second (third) dominant species of the Chiafong and Manfong were Mola molaas (Decapterus kurroides) and Tylosurus acus melanotus (Megalaspis cordyla), respectively. The average catches of top three dominant species at two fishing ground, 46.2% and 26.82%, indicated dominant species’ significant effects on their annual outputs.
| Identifer | oai:union.ndltd.org:TW/100NKIMT451006 |
| Date | January 2012 |
| Creators | Wu,Ying-Chang, 吳盈璋 |
| Contributors | Jenq,Huoo-Yuan, 鄭火元 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 94 |
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