碩士 / 國立中興大學 / 水土保持學系所 / 98 / Base on field survey data of fish on Tou-Bian-Keng creek, Taichung from 2004 to 2009, the fish types has been classified into attributes of aqua- habitat, body length and water pollution resistance to identify the correlation between fish composition and factors of aquatic habitat environment.
The investigations take quarterly of totally 21 from 2004 to 2009 on the Tou-Bian-Keng creek, Taichung. Chi-square and Pearson correlation test has been used to explore the relationship between fish, water quality and hydrology.
The correlation analysis results has illustrated that aqua-habitat types show little significant difference in hydrology factors of water velocity(0.0-0.7m/s) and water depth(4.6-38.0cm), while water quality factors of water temperature(16.0~33.9℃) and turbidity(0.1-467.9NTU) show negative correlation，and conductivity (165~677μs/cm) and dissolved oxygen (4.4-13.6mg/l) show positive correlation. For these reasons, the aqua-habitat types and fish population were not sufficient to reflecting changes in water velocity and water depth yet is capable to identify change in water quality in Tou-Bian-Keng creek.
In pollution resistance aspect, the occurrence frequency of fish shows little significant difference in water quality factors such as water temperature, EC, PH, turbidity and DO, as well as in hydrology factors such as velocity, depth and river width. Hence the appearance frequency of fish was failed to use as indicator to identify water quality of Tou-Bian-Keng creek.
Additionally, fish body length has also been used as classification factor to identify applicability and correlation between fish population and the selected water quality and hydrology factors. The study has figure out that occurrence frequency of fish and water temperature show significant correlation according to classification of fish body length , fish population also illustrated negative correlation between water quality factors of water temperature (16.0 ~ 33.9 ℃) and turbidity (0.1-467.9NTU) ,while conductivity (165 ~ 677μs/cm) and dissolved oxygen (4.4-13.6mg / l) show a positive correlation ;among which the number of small fish (≦ 5cm) and water depth (4.6-38.0cm) show significant negative correlation. The study results may be related to the scale of investigation space or the investigation methods.
| Identifer | oai:union.ndltd.org:TW/098NCHU5080021 |
| Date | January 2010 |
| Creators | Song-Cing Lai, 賴松慶 |
| Contributors | 林信輝 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 72 |
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