碩士 / 國立嘉義大學 / 水產生物學系研究所 / 94 / The sailing-fin molly fish (Poecilia latipinna ) is a popular fish that living at the estuary of western-southern Taiwan. They can survive from freshwater (0 ppt) to seawater (50 ppt). It was showed 100% and 50% survival rate upon 24 hr of transfer from 0 ppt to 35 ppt SW and from 0 ppt to 40 ppt SW, respectively. But, there were no fish died from SW direct transfer to FW. The objective of this study was to understand the mechanism of salinity in P. latipinna, especially focused on gill and kidney tissues. Results showed in gill (1) Na+-K+-ATPase specific activity (NKA) of P. latipinna in SW adaptation fish was higher than in FW-. (2) NKA in gills of P. latipinna were significantly increased as compare to control after 72 hr of transfer from FW to SW. (3) SW has adapted fish of P. latipinna transfer to FW, the NKA was significantly decreased than control at 7 and 12 hr of transfer. Compare the muscle water content of P. latipinna was still appeared dehydration after 36 hr of transfer from FW to SW, but it was recovery after 48 hr of transformation. Results appeared in kidney that showed (1) Either in gill or in kidney, both the NKAI reaction were no significantly difference between FW and SW adaptation of P. latipinna, but the nuclear size of renal was bigger at FW fish than SW fish of P. latipinna. According to these results, we suggested that the P. latipinna appeared high tolerance of salinity because it has a powerful of osmo-regulated mechanism.
| Identifer | oai:union.ndltd.org:TW/094NCYU5613013 |
| Date | January 2004 |
| Creators | Ming-Ju Chung, 鍾明儒 |
| Contributors | Su-Mei Wu, 吳淑美 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 0 |
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