Effects of Environmental pH on the Hepatic Mixed Function Oxidases in Atlantic Salmon ( Salmo salar )
Atlantic salmon (Salmo salar) were held for some months in the Medway River, N.S., at pH 5.2–5.5 and in the Westfield River, N.S., in either untreated ("acidic") water at pH 4.7–5.2 or limed water at pH 51.–5.9 and were examined for effects on hepatic monooxygenases. Fish from the Westfiel...
| Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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| Main Authors: | , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Canadian Science Publishing
1991
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1139/f91-059 http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-059 |
| Summary: | Atlantic salmon (Salmo salar) were held for some months in the Medway River, N.S., at pH 5.2–5.5 and in the Westfield River, N.S., in either untreated ("acidic") water at pH 4.7–5.2 or limed water at pH 51.–5.9 and were examined for effects on hepatic monooxygenases. Fish from the Westfield'acidic regime had lower body weights than those from the other two regimes, but similar liver weights. Females generally had higher hepatic microsomal protein contents than males, but this variable was not affected by environmental pH. Westfield acidic fish usually had higher benzo[a]pyrene hydroxylase and lower ethoxyresorufin O-deethylase activity than those from the other two regimes. Cytochromes P450 and b 5 showed no clear difference between groups. Although the different pH environments affected reproductive success and steroid hormone metabolism, such changes were not reflected in these components of the hepatic monooxygenase system. |
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