碩士 / 國立高雄海洋科技大學 / 漁業生產與管理研究所 / 95 / Abstract
This study is aimed at analyzing and comparing fishing conditions of the Hsinshefar set-net fishing company (24o 30′ N, 121o 50′ E), located at Tang-Ao bay, and Chiafong set-net fishing company (24o 10′ N, 121o 40′ E), located at Cheng-Der bay, northeast coastal water of Taiwan, including species composition and fluctuations of fishing conditions from 1995 to 2003 through fishing data analysis. The results obtained are summarized as follows:
There are more dominant species at the Chiafong set-net fishing ground than the Hsinshefar set-net fishing ground, but there is little difference of each species catch at Hsinshefar set-net fishing ground.
Regarding dominant species, the two set-net fishing grounds are mostly pelagic migratory species. Sarda orientalis and Auxis thazard are the top one dominant species at Hsinshefar and Chiafong set-net fishing grounds respectively. Furthermore Auxis rochei, Trichiurus lepturus and Decapterus kurroides, Auxis rochei are the second and third dominant species at Hsinshefar and Chiafong set-net fishing grounds respectively, and comprising about 40 % of annual landing at those set-net fishing grounds.
By two-way ANOVA analysis, it showed that there is significant difference on geographical CPUE between Hsinshefar and Chiafong set-net fishing grounds, and there are six species such as Sarda orientalis, Auxis rochei, Trichiurus lepturus, Selar crumenophthalmus, Tylosurus acus melanotus, Seriola dumerili at the Hsinshefar set-net fishing ground more than Chiafong’s on CPUE(P＜0.05；P＜0.01), as well as only Auxis thazard species is opposite at Chiafong set-net fishing ground on CPUE(P＜0.01).
It seems that the two set-net fishing grounds have similar fishing period. However period peak on Trichiurus lepturus at Hsinshefar set-net fishing ground fishing is in March, as well as in April at Chiafong set-net fishing ground. On the other hand, the fishing period peaks on Scomber australasicus and Coryphaena hippurus are in February and December respectively at Chiafong set-net fishing ground.
Fishing condition at the Hsinshefar set-net fishing ground is better than Chiafong’s, because it owned fine fishing ground environmental conditions. Such as estuary front、wide continental shelf、superior bay、upwelling and artificial reefs etc.
| Identifer | oai:union.ndltd.org:TW/095NKIM8451002 |
| Date | January 2007 |
| Creators | Duen-Bao Gau, 高敦寶 |
| Contributors | Huoo-Yuan Jenq, 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 | 97 |
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