Summer habitat selection by striped bass, Morone Saxatilis, in Cherokee Reservoir, Tennessee, 1977
Summer habitat selection patterns of 18 adult striped bass (Morone saxatilis) in Cherokee Reservoir were monitored with externally attached temperature-sensing acoustic or radio transmitters from June through September 1977. Mortalities of adult striped bass in this reservoir were hypothesized to be related to high summer temperatures and low dissolved oxygen (DO). The inhabited areas or refuges differed from noninhabited areas by maintaining temperatures less than or equal to 22 C and DO concentrations greater than 5 mg/liter. Total water hardness, pH, and water transparency were not significantly different among refuges and noninhabited areas. Movement of fish outside refuges occurred more frequently and for longer periods during June when the summer pattern of high temperatures and low DO was less severe. Fish experienced temperatures between 15 and 27 C with mean temperatures of individuals ranging from 18.5 to 22.0 C. Several tagged fish migrated outside the refuges and selected the lowest available temperature, generally near 21 C, even though DO concentrations at these temperatures were 3 mg/liter or less. Long-term survival of tagged and nontagged fish outside refuges was undetermined because no fish were tracked outside a refuge for more than 12 days without being lost. This study indicates that temperature strongly influences the behavior of striped bass and that adults of this species may have a thermal preferendum of approximately 21 C.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5704852
- Report Number(s):
- ORNL/TM-6927
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BEHAVIOR
TEMPERATURE EFFECTS
STRIPED BASS
HABITAT
BIOLOGICAL EFFECTS
MINERALS
MORTALITY
OXYGEN
PH VALUE
RESPONSE MODIFYING FACTORS
SEASONAL VARIATIONS
TENNESSEE
THERMAL EFFLUENTS
TURBIDITY
WATER QUALITY
ANIMALS
AQUATIC ORGANISMS
CRYOGENIC FLUIDS
ELEMENTS
ENVIRONMENTAL QUALITY
FISHES
FLUIDS
NONMETALS
NORTH AMERICA
SOUTHEAST REGION
USA
VARIATIONS
VERTEBRATES
560205* - Thermal Effects- Vertebrates- (-1987)