1. 1. Common carp (Cyprinus carpio) exposed to experimental temperatures of 12, 18, 24, 30 or 36°C for a 4-week period were used to investigate the effect of temperature acclimation on the frequency of opercular movement (FOM), growth and cytochrome c oxidase (CCO) activity in heart, liver and muscle. 2. 2. An exponential relationship between FOM and temperature after the first week (1010 =1.76) disappeared after the second week. 3. 3. The initially high FOM at temperatures of 30 or 36°C and the low FOM at 18 or 12°C changed over 4 weeks to approach the FOM of fish at 24°C. 4. 4. This change in the relationship of FOM to temperature from highly dependent to independent appeared to be thermal compensation. 5. 5. Heart and liver CCO activities were significantly affected by temperature, with the lowest activity at the approximate optimum temperature for growth, 24°C. 6. 6. Highest CCO activities for heart and liver occurred at both the highest and lowest temperatures. 7. 7. Among the three tissues, heart CCO activity was generally the highest and most affected by acclimation temperature. 8. 8. Muscle tissue had the lowest CCO activity and was unaffected by temperature. 9. 9. The high CCO activity at a cold acclimation of temperature 12°C was probably due to thermal compensation and the high activity at 36°C may have been a result of thermal stress.
|Original language||English (US)|
|Number of pages||6|
|Journal||Comparative Biochemistry and Physiology -- Part A: Physiology|
|State||Published - 1990|
Bibliographical noteFunding Information:
.4ckno+riedgements-Thsitsu dy was supportedb y a grant from the Universityo f MinnesotaA griculturalE xueriment Station. We are -grateful to Jay Maher for technical assistance.