碩士 / 國立臺灣海洋大學 / 環境生物與漁業科學學系 / 104 / This study used 14 bottom trawl fishing vessels from Ziguan and 19 bottom trawl fishing vessels from Donggang. These 33 vessels were in the southwestern coast of Taiwan. In order to analyze the long-term resource utilization in the southwestern coast of Taiwan, this study compiled three fishery ecological indicators from the log books during 1997 to 2012, including Mean trophic level(MTL), MTL Contribute trophic level(CTL) and the Fishing-in-balance index(FiB).
The results of this paper, analysis of species composition of the catch：in southwestern coast of Taiwan, the catch a total of 151 kinds of fish, including the total number of fish catches Ziguan area 119 species; the total number of fish catches in Donggang District 111 species. Further analysis,only appeared in Ziguan regions catch species number of 45 species, only appeared in the eastern port district number 34 kinds of fish catches, While appearing in Ziguan and Donggang catch species was 72 species.
In Varied species composition ratio analysis: in southwestern coast of Taiwan ,varied species composition of catches to Reef-associated and Demersal based, taken together accounts for about 83.5%. Pelagic accounted for only about 9.9%; and more Benthopelagic only 6.6%.
In the mean trophic level（MTL）index analysis: Ziguan area catches the mean trophic level, ranging from 3.47 to 4.03; Donggang area catches the meantrophic level, ranging from 3.84 to 4.26; and in southwestern coast of Taiwan on the whole, catches the mean trophic level,ranging from 3.78 to 4.16.
In MTL Contribute trophic level (CTL)species analysis: In 1997 to 2012, the cumulative contribution of in southwestern coast of Taiwan fish catches CTL analysis more than 70%, the statistics MTL contribution to the three species:white octopus(Trichiurus lepturus) butterfish (Psenopsis anomala) and bigeye (Priacanthus macracanthus).
To fishing-in-balance index (FiB) analysis：Using 1997 as the benchmark, Ziguan area fishing-in-balance index (FiB) from 1998 to 2005 the average annual negative, since 2006, gradually turned positive；Donggang area fishing-in-balance index (FiB) from 1998 to 2012 the average annual positive, and the value has increased year by year trend. The overall fishing-in-balance index (FiB) in southwestern coast of Taiwan in terms of catches, In addition to the 1998, 2003 and 2004 is negative, the rest of the year are positive, and there are rising year by year, is displayed in the in southwestern coast of Taiwan, it has not overfishing.
| Identifer | oai:union.ndltd.org:TW/104NTOU5451034 |
| Date | January 2016 |
| Creators | Chang , Chen-Hui, 張晨暉 |
| Contributors | Liao , Cheng-Hsin, 廖正信 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 48 |
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