Comparative cold resistance of three Columbia River organisms. [Thermal stresses, fishes, Crustaceans]
Resistance to abrupt and gradual cold shock was determined in bioassays with pumpkinseed (Lepomis gibbosus), rainbow trout (Salmo gairdneri) and a northwestern crayfish (Pacifastacus leniusculus) acclimated to higher temperatures at 5 C increments. Test criteria were median tolerance limits (TLm) for 96-h exposures after abrupt cold shock, and 50% loss of equilibrium (LE50) for decline rates of 18, 15, 10, 5 and 1 C/h during gradual cold shock. Cold resistance depended on original acclimation temperature (AT) and varied among species under both test conditions in the order: pumpkinseed < rainbow trout < crayfish. The lower TLm limit for pumpkinseed was 12.3 C at 30 C AT, 9.6 C at 25 C AT, 4.5 C at 20 C AT, and 2.7 C at 15 C AT. Rainbow trout at 20, 15 and 10 C AT survived abrupt exposures to cold down to 3.3, 1.4 and 0.5 C, respectively. Crayfish at 25, 20 and 15 C AT survived exposures down to 2.5, 0.4 and 0.0 C, respectively. TLm values were slightly above LE50 values for both fish species but well below for crayfish. Partial adaptation significantly lowered LE values at decline rates below 18 C/h for pumpkinseed, and to a lesser extent for the other two species, thus extending the lower margin of cold resistance.
- Research Organization:
- Battelle Pacific Northwest Labs., Richland, WA
- OSTI ID:
- 5643330
- Journal Information:
- Trans. Am. Fish. Soc.; (United States), Vol. 106:2
- Country of Publication:
- United States
- Language:
- English
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Direct effects of cold shock: bioassays with three Columbia River organisms
Resistance of a northwestern crayfish, Pacifastacus leniusculus (Dana), to elevated temperatures
Related Subjects
CRUSTACEANS
TOLERANCE
FISHES
THERMAL POLLUTION
BIOLOGICAL EFFECTS
BIOLOGICAL ADAPTATION
COMPARATIVE EVALUATIONS
TEMPERATURE EFFECTS
ANIMALS
AQUATIC ORGANISMS
ARTHROPODS
INVERTEBRATES
POLLUTION
VERTEBRATES
560205* - Thermal Effects- Vertebrates- (-1987)