Adaptation of copepod populations to thermal stress. Technical report
The range of temperatures tolerated by the copepod Eurytemora affinis was found to increase with increasing salinity and with temperature acclimation. Developmental temperature also had a positive influence, as did sex, at least at higher acclimation temperatures. The effects of salinity and acclimation were independent. Female adults were equally or more tolerant then males and pre-adult stages were significantly more tolerant than adults. Thus, the range of successful reproduction, and so survival, depends on the tolerance range of adults. Considerable individual flexibility, at less 1 ppt and without prior acclimation was demonstrated by animals tolerating an increase in temperature from 3C to 33C in less than 2 hours. There was evidence of long-term (genetic) flexibility, which would allow the species to adapt to novel thermal environments. (GRA)
- Research Organization:
- Maryland Univ., College Park (USA). Water Resources Research Center
- DOE Contract Number:
- DI-14-31-0001-5020
- OSTI ID:
- 7175808
- Report Number(s):
- PB-244706
- Country of Publication:
- United States
- Language:
- English
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Increase in range of temperature tolerance by acclimation in the copepod Eurytemora affinis
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Related Subjects
AQUATIC ORGANISMS
BIOLOGICAL ADAPTATION
CRUSTACEANS
THERMAL STRESSES
ECOLOGY
ESTUARIES
REPRODUCTION
SALINITY
WATER POLLUTION
ANIMALS
ARTHROPODS
INVERTEBRATES
POLLUTION
STRESSES
SURFACE WATERS
560204* - Thermal Effects- Invertebrates- (-1987)