caa a22 4500 47711721X CHVBK 20180405111626.0 cr unu---uuuuu 170330e19960801xx s 000 0 eng 10.1007/BF02112362 doi (NATIONALLICENCE)springer-10.1007/BF02112362 Endogenous antioxidant systems of two teleost fish, the rainbow trout and the black bullhead, and the effect of age [Elektronische Daten] [Diana Otto, Thomas Moon] Antioxidant enzyme activities and glutathione status were determined in different tissues of two teleost species, the rainbow trout (Oncorhynchus mykiss) and the black bullhead (Ameiurus melas) to establish whether age-related changes exist between mature and immature individuals. Glutathione reductase and superoxide dismutase activities were significantly lower in hepatic and extrahepatic tissues of 3+ year than 1+ year trout and bullheads. Activities of glutathione peroxidase, catalase and glutathione S-transferase did not exhibit a clear pattern, with decreases in liver and kidney, but increases in gill and muscle tissues. Glutathione concentrations were significantly higher in most tissues of 3+ year than in 1+ year trout, but remained unchanged or decreased in tissues of older bullheads. The results imply an age- or maturation-dependent effect on key antioxidant enzymes in various tissues of these 2 teleost species. Thus, age and maturation may impact upon the use of oxidative stress parameters as indicators of contaminant exposure in environmental studies. Kugler Publication bv Amsterdam, 1996 glutathione nationallicence antioxidant enzymes nationallicence age nationallicence maturation nationallicence rainbow trout nationallicence black bullhead nationallicence CAT : catalase nationallicence GGT : γ-glutamyl transpeptidase nationallicence GPX : glutathione peroxidase nationallicence GR : glutathione disulfide reductase nationallicence GSH : reduced glutathione nationallicence GSSG : glutathione disulfide nationallicence GST : glutathione S-transferase nationallicence SOD : superoxide dismutase nationallicence TBARS : thiobarbituric acid reactive substances nationallicence TGSH : total glutathione nationallicence Otto Diana Ottawa-Carleton Institute of Biology, Department Biology, University of Ottawa, P. O. Box 450 Stn A, K1N 6N5, Ottawa, Ontario, Canada aut Moon Thomas Ottawa-Carleton Institute of Biology, Department Biology, University of Ottawa, P. O. Box 450 Stn A, K1N 6N5, Ottawa, Ontario, Canada aut Fish Physiology and Biochemistry Kluwer Academic Publishers 15/4(1996-08-01), 349-358 0920-1742 15:4<349 1996 15 10695 https://doi.org/10.1007/BF02112362 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02112362 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Otto Diana Ottawa-Carleton Institute of Biology, Department Biology, University of Ottawa, P. O. Box 450 Stn A, K1N 6N5, Ottawa, Ontario, Canada aut NATIONALLICENCE 700 1- Moon Thomas Ottawa-Carleton Institute of Biology, Department Biology, University of Ottawa, P. O. Box 450 Stn A, K1N 6N5, Ottawa, Ontario, Canada aut NATIONALLICENCE 773 0- Fish Physiology and Biochemistry Kluwer Academic Publishers 15/4(1996-08-01), 349-358 0920-1742 15:4<349 1996 15 10695 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer