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|Title:||Exposure to Sublethal Concentrations of Copper Affecting Ion Balance in Tilapia Larvae (Oreochromis Mossambicus)|
Department of Life Science, NTNU
Tilapia larvae (post-hatch. 1-day stage) ere exposed with 0 (control) and 100 μg/L (treatment) for 11 days, and the hole body of the calcium and sodium content as detected after copper exposure at 0, 1, 3, 5, 7, 12 hr and 1, 2, 5, 7, 10, 11 days. The present data show it didn't undergo significant change during 0~12 hr and 0~48 hr of copper exposure for the sodium content and calcium content, respectively. The sodium content was significantly decreased to compare with the control group 12 hr after copper exposure. It was still lower on treatment than the control group. However, the range of the sodium content between treatment and control became narrower during 5~11 days of copper exposure. Besides, the range of the calcium content as smaller and smaller following the copper exposure time. No larvae died during this study, but both the Ca(superscript 2+) and Na(superscript +) levels increased gradually following the larvae growth. According to these data, we suggest that the larvae acclimated in the hypo-sodium and hypo-calcium states, awl even the growth rate of the larvae as inhibited by ambient copper.
|Appears in Collections:||生物學報|
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