Primary stress responses of common carp, Cyprinus carpio, exposed to copper toxicity
2007
Ramesh, M..,Bharathiar University, Coimbatore (India). Dept of Zoology | Senthil Kumaran, S. | Kavith, C. | Saravanan, M. | Mustafa, A.,Indiana University Purdue University, Fort Wayne (USA). Dept of Biology
The potential effect of a heavy metal-copper on hormonal changes (cortisol and prolactin) in an economically important fresh-water fish-common carp, Cyprinus carpio, was examined. The experimental fish were subjected to two experimental regimes (backed by controls). In the first treatment they were exposed to the acute concentration of copper sulphate, amounting to 0.7 ppm. The second treatment featured copper sulphate concentration of 0.07 ppm. In both acute- and sublethal treatments, both cortisol- and prolactin levels increased. In sublethal treatment, however, plasma prolactin level decreased after 28-day exposure, showing a minimum percentage point decrease of 3.84 by the end of 35-day trial. The increase of the plasma cortisol was probably caused by release of cortisol from the interrenal tissue, as a mechanism of coping with stress
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