Seasonal changes in antioxidant defence system of liver and gills of Salmo trutta caspius, Salmo trutta labrax and Salmo trutta macrostigma
JOURNAL OF FISH BIOLOGY, vol.74, no.4, pp.842-856, 2009 (SCI-Expanded)
- Publication Type: Article / Article
- Volume: 74 Issue: 4
- Publication Date: 2009
- Doi Number: 10.1111/j.1095-8649.2008.02164.x
- Journal Name: JOURNAL OF FISH BIOLOGY
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.842-856
- Keywords: antioxidant enzymes, gonado-somatic index, oxidative stress, reactive oxygen species, Salmo trutta sp, seasonal variations, FRESH-WATER FISH, OXIDATIVE STRESS, HEPATIC BIOTRANSFORMATION, GLUTATHIONE-PEROXIDASE, SUPEROXIDE-DISMUTASE, BROWN TROUT, ENZYMES, RESPONSES, BIOMARKERS, DAMAGE
- Open Archive Collection: AVESIS Open Access Collection
- Akdeniz University Affiliated: No
Abstract
Seasonal changes in antioxidant enzyme activities (superoxide dismutase, SOD, EC 1.15.1.1; catalase, CAT, EC 1.11.1.16; glutathione peroxidase, GPx, EC 1.11.1.9; glutathione reductase, GR, EC 1.6.4.2; glucose-6-phosphate dehydrogenase, G6PD, EC 1.1.1.49 and glutathione S-transferase, GST, EC 1.5.1.18) and lipid peroxidation (LPO) levels of livers and gills of female Caspian trout Salmo trutta caspius, Black Sea trout Salmo trutta labrax and mountain trout Salmo trutta macrostigma were investigated. SOD, CAT, GPx, G6PD and GST activities were higher in liver compared to gills of all sub-species; concomitantly, the GR activity was also higher in the livers of S. t. caspius and S. t. labrax, but the reverse was seen in S. t. macrostigma. LPO levels were higher in the gills compared to the liver of all sub-species. There was no general trend in the seasonal changes in the gill antioxidant enzyme (AE) activities or LPO levels. Higher AE activities, however, were found in the liver of each sub-species during autumn, and this coincided with an increase in the gonado-somatic index.