Influence of Salinity, Temperature, and Exercise on Plasma Osmolality and Ionic Concentration in Atlantic Salmon ( Salmo salar )
In unexercised Atlantic salmon (Salmo salar), plasma osmolality and Na + and Ca ++ concentrations varied little at temperature-salinity combinations of 3, 5, 10, and 14 C and 0, 15, and 30‰. Plasma K + tended to increase with increase in temperature. Cl − values were similar at 5 and 14 C. At 1 C an...
| Published in: | Journal of the Fisheries Research Board of Canada |
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| Main Authors: | , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Canadian Science Publishing
1972
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1139/f72-181 http://www.nrcresearchpress.com/doi/pdf/10.1139/f72-181 |
| Summary: | In unexercised Atlantic salmon (Salmo salar), plasma osmolality and Na + and Ca ++ concentrations varied little at temperature-salinity combinations of 3, 5, 10, and 14 C and 0, 15, and 30‰. Plasma K + tended to increase with increase in temperature. Cl − values were similar at 5 and 14 C. At 1 C and 0‰, lower plasma osmolalities indicated reduced ability to osmoregulate. At 1 C and 30‰, elevated osmolalities and ionic values and mortalities indicated severe osmotic stress.After exercise for 2 hr at 3–4 body lengths/sec at 5 and 14 C, salmon in salinities of 0 and 15‰ had osmolalities and ionic values the same as or little changed from unexercised values. There were marked increases in the values following exercise in 30‰. |
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