碩士 / 國立嘉義大學 / 水生生物科學系研究所 / 97 / Parambassis siamensis, which is known as glass fish, causes considerable damage to economical species in the Sun-Moon Lake, but its feeding habits and the impact on aquatic organism had not been understood clearly. The doubt as reference for prevention and treatment in the future need to be investigated.
The glass fish in the Sun-Moon lake was sampled monthly by a square-shape fishing net from June 2005 to May 2007. A total of 718 fish and a total weight of 2,365.60 g were collected. Their stomach contents were examined, and then, analyzed with CLUSTER, MDS, the similar percentage (SIMPER) and one-way ANOSIM in PRIMER 6.0, and compared among the seasons, genders, and body sizes. The results showed that the major food items of the glass fish were fish fry and Chironomids. No significant difference was found in food items between the genders, among the seasons, and among the body size classes. Due to no significant difference in components of food items of the glass fish in different areas, the glass fish belongs to opportunist. In daily food consumption rate and food consumption, daily food consumption rate is 1% of body weight at 28 ℃, 1.12% of body weight at 23 ℃, 0.54% of body weight at 18 ℃, the results showed the decreasing of daily food consumption rate was the trend toward the temperature drop. Daily food consumption rate was estimated, it was showed that glass fish which average body weight was 1 g could ingest 11.51 mg food at 28 ℃, then it could also ingest 5.60 mg food approximately 3.73 fry at 18 ℃. Due to their strong piscivorous habit, the exotic glass fish may cause damaging effects on the aquatic ecosystem and native fish populations.
| Identifer | oai:union.ndltd.org:TW/097NCYU5061002 |
| Date | January 2009 |
| Creators | Chih-Hung Chen, 陳智宏 |
| Contributors | Shih-Rong Kuo, 郭世榮 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 101 |
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