Sublethal effects of cadmium exposure on freshwater teleosts
Biochemical and physiological parameters were examined to investigate the effects of sublethal concentrations on freshwater teleosts (golden shiner, Notemigonus crysoleucas; fathead minnow, Pimephales promelas; and bluegill sunfish, Lepomis macrochirus). Accumulation profiles of fish environmentally exposed to cadmium demonstrated that tissue distribution was time- and concentration-dependent. Gill tissue and internal organs accumulated significant residue levels of cadmium. Investigations concerned with the influence of cadmium on gill ATPase activity indicated that enzymatic activity was sensitive to cadmium exposure. An acute (48 h) comparative study was performed with the three species of freshwater teleosts. A stimulation of Na/K ATPase activity was observed at an exposure concentration of 1 {mu}g Cd/1 in bluegill sunfish and fathead minnows. At higher exposure concentrations (10 and 100 {mu}g Cd/1) an inhibition of enzymatic activity was observed. Gill Na/K ATPase activity in golden shiners was not significantly influenced by cadmium exposure. The observed insensitivity of Na/K ATPase in golden shiners may, in part, be related to high background concentrations of cadmium in gill tissue. An overall inhibitory response of gill Na/K ATPase was demonstrated in bluegill sunfish exposed to 10 and 100 {mu}g/1 of cadmium for 14 d. These results support the conclusion that biochemical and physiological parameters have potential for diagnostic use in assessing the overall environmental health of fish populations.
- Research Organization:
- Northeast Louisiana Univ., Monroe, LA (USA)
- OSTI ID:
- 7149743
- Resource Relation:
- Other Information: Thesis (Ph.D)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
CADMIUM
TOXICITY
FISHES
SENSITIVITY
ATP-ASE
BIOLOGICAL ACCUMULATION
BIOLOGICAL MARKERS
DOSE-RESPONSE RELATIONSHIPS
ENVIRONMENTAL EXPOSURE
ENZYME ACTIVITY
TIME DEPENDENCE
TISSUE DISTRIBUTION
ACID ANHYDRASES
ANIMALS
AQUATIC ORGANISMS
DISTRIBUTION
ELEMENTS
ENZYMES
HYDROLASES
METALS
PHOSPHOHYDROLASES
VERTEBRATES
560300* - Chemicals Metabolism & Toxicology
540320 - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)