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dc.contributor.author Babitha Rani, A. Hasnat en_US
dc.contributor.author Kohli, M.P.S. en_US
dc.contributor.author Chandraprakash, G. en_US
dc.date.accessioned 2012-10-15T23:32:29Z
dc.date.available 2012-10-15T23:32:29Z
dc.date.issued 2012 en_US
dc.identifier.issn 0792-156X en_US
dc.identifier.other IJA_64.2012.779
dc.identifier.uri http://hdl.handle.net/10524/31824
dc.description.abstract Goldfish (Carassius auratus) fry (80 mg) were fed purified diets based on casein as a protein source and containing different levels of supplementary zinc (0, 30, 60, 90, 120, 150 mg Zn/kg diet) for nine weeks. There were overt signs of zinc deficiency (suppressed growth, high mortality) in fish fed the zinc-deficient control diet, while the highest growth was obtained in fish fed the 60 mg Zn/kg diet. Alkaline phosphatase (ALP) activity in the muscle and super-oxide dismutase (SOD) activity in the liver were highest in fish fed the 60 mg Zn/kg diet and did not significantly improve beyond this level. Muscle and whole body zinc concentrations increased proportionately with the dietary zinc supplementation but iron and copper concentrations in fish tissue were not affected by the supplementary zinc. After the 9-week trial, twelve fish were subjected to thermal stress (28-32°C) for another four weeks to observe growth and the physiological response of the stress enzyme, SOD. After thermal stress, growth improved with the increase in zinc. Likewise, SOD activity in the fish liver increased, indicating that fish utilize more zinc in high temperatures to counteract stress. en_US
dc.format.extent 7 pages en_US
dc.relation.ispartofseries The Israeli Journal of Aquaculture - Bamidgeh en_US
dc.subject dietary zinc en_US
dc.subject Carassius auratus en_US
dc.subject super oxide dismutase (SOD) en_US
dc.subject alkaline phosphatase (ALP) en_US
dc.subject thermal stress en_US
dc.subject.lcsh Fish culture--Israel. en_US
dc.subject.lcsh Fish culture. en_US
dc.title Zinc Supplementation and its Effect on Thermal Stress Resistance in Carassius auratus Fry en_US

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