کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1977086 | 1539272 | 2016 | 6 صفحه PDF | دانلود رایگان |
In the present study, the effect of copper was examined in the common goldfish (Carassius auratus auratus). Fish were fasted and exposed to either a high (0.84 μM), a low (0.34 μM) or a control copper concentration (0.05 μM) for 1 and 7 days. Swimming performance was not affected by either fasting or copper exposure. Food deprivation alone had no effect on ionoregulation, but low plasma osmolality levels and plasma Na+ were noticed in fasted fish exposed to Cu for 7 days. Both gill Na+/K+-ATPase and H+-ATPase activities were undisturbed, while both kidney ATPase activities were up-regulated when challenged with the high Cu levels. Up-regulated kidney ATPase activities likely acted as compensatory strategy to enhance Na+ reabsorption. However, this up-regulation was not sufficient to restore Na+ to control levels in the highest exposure group.
Journal: Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology - Volume 190, December 2016, Pages 32–37