碩士 / 國立清華大學 / 生物資訊與結構生物研究所 / 95 / In general, most researches on the relationships between fishways and riverine creatures focuses mainly on specific fish that use a fishway, or the behavior of fish that swim upstream in different hydraulic conditions. However, few studies have discussed the circumstances in which migratory species use a fishway.
In this study the exploitation of the fishway of Shin-Kang Dam by migratory creatures was investigated. The methodology included the analysis of the abundance, richness, diversity, evenness and similarity coefficient of the fish and crustacea present, in order to understand what creatures use the fishway for migration and the times when they use it.
The findings here indicated that most creatures in Tachia River used the fishway from winter to spring, and from spring to summer. The major period that those creatures swam upstream was that Hemimyzon formosanus from August to April, Sinogastromyzon puliensis from October to December, and Formosania lacustre from October to December. Microphysogobio alticorpus showed two periods of upstream, from April to June and October to December. Among those creatures Hemimyzon formosanus and Sinogastromyzon puliensis could be classified as potamodromous fishes.
The results indicate that the Shin-Kang Dam has become a major obstacle to migratory creatures between the Chang-Geng Bridge and Bi-Feng Bridge, large portion of creatures could not swim upstream by the fishway. The study also indicates that a nearby auxiliary dam and waterfall also act as obstacles to migratory creatures. We suggest that modifications to these obstacles be carried out to allow successful passage of the migratory creatures. The further study of the exploitation of the fishway of Shin-Kang Dam by migratory creatures should be conducted over a longer period of time.
| Identifer | oai:union.ndltd.org:TW/095NTHU5112024 |
| Date | January 2007 |
| Creators | Jian-Ting Chen, 陳建廷 |
| Contributors | Chyng-Shyan Tzeng, 曾晴賢 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 62 |
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