Physiological responses to temperature in two latitudinally separated populations of the mussel, Mytilus edulis
Thompson, R.J.; Newell, R.I.E. (1985). Physiological responses to temperature in two latitudinally separated populations of the mussel, Mytilus edulis, in: Gibbs, P.E. (Ed.) Proceedings of the 19th European Marine Biology Symposium, Plymouth, Devon, UK, 16-21 September 1984. pp. 481-495 In: Gibbs, P.E. (Ed.) (1985). Proceedings of the Nineteenth European Marine Biology Symposium, Plymouth, Devon, UK, 16-21 September 1984. European Marine Biology Symposia, 19. Cambridge University Press: Cambridge. ISBN 0-521-30294-3. 541 pp., more In: European Marine Biology Symposia., more |
| Authors | | Top | - Thompson, R.J.
- Newell, R.I.E.
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| Abstract | In August 1982, mussels (Mytilus edulis) from populations at Bellevue, Newfoundland, and Stony Brook, New York, responded to an increase in temperature from 15 to 25°c by increasing oxygen uptake and ammonia excretion, but reducing absorption efficiency. Clearance rate was considerably reduced at 25°c in the northern population, whereas mussels from the southern population were able to maintain a higher clearance rate under these conditions. Scope for growth decreased at 25°c in both populations, but the decrease was greater in the Bellevue mussels. Mortality was much higher in the Bellevue group. In a similar experiment during April 1984, when the temperature was increased from 5 to 15°C, there was no difference in physiological response between the two populations. There was no sustained influence of temperature on clearance rate, except for a decrease at 25°C in Bellevue mussels. In contrast, oxygen uptake did not acclimate to temperature in either population, especially between 15 and 25°c. This may be attributable in part to the presence of a large mass of metabolically active cells in the ripe gonads of the mussels used for the August experiment. |
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