Physiological, toxicological, and population responses of smallmouth bass to acidification. Lake Acidification and Fisheries Project
- eds.
- Wyoming Univ., Laramie, WY (United States). Dept. of Zoology and Physiology
The Lake Acidification and Fisheries (LAF) project examined effects of acidic water chemistries on four fish species. This report presents an overview of investigations on smallmouth bass (Micropterus dolomieui). Experiments conducted with this species included as many as 84 exposure combinations of acid, aluminum, and low calcium. In egg, fry, and juvenile stages of smallmouth bass, increased acid and aluminum concentrations increased mortality and decreased growth, while increased calcium concentrations often improved survival. Relative to the juvenile life stages of smallmouth bass tested, yolksac and swim-up fry were clearly more sensitive to stressful exposure conditions. While eggs appeared to be the most sensitive life stage, this conclusion was compromised by heavy mortalities of eggs due to fungal infestations during experimental exposures. As found in our earlier studies with brook and rainbow trout, acid-aluminum stressed smallmouth bass exhibited net losses of electrolytes across gills and increased accumulation of aluminum on gill tissues. Overall, our results indicated that smallmouth bass were generally more sensitive to increased exposure concentrations of aluminum than to increased acidities. Compared to toxicology results from earlier LAF project studies, smallmouth bass were more sensitive than brook trout and slightly less sensitive than rainbow trout when exposed to water quality conditions associated with acidification.An example application of the LAF modeling framework shows how different liming scenarios can improve survival probabilities for smallmouth bass in a set of lakes sensitive to acidification.
- Research Organization:
- Electric Power Research Inst., Palo Alto, CA (United States); Wyoming Univ., Laramie, WY (United States). Dept. of Zoology and Physiology
- Sponsoring Organization:
- Electric Power Research Inst., Palo Alto, CA (United States)
- OSTI ID:
- 10173151
- Report Number(s):
- EPRI-TR--101062; ON: UN92040701
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540220
560300
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ACID RAIN
ACIDIFICATION
ALUMINIUM
BIOLOGICAL EFFECTS
CHEMICALS METABOLISM AND TOXICOLOGY
CHEMICALS MONITORING AND TRANSPORT
EGGS
ENVIRONMENTAL EFFECTS
FISHERIES
FISHES
GILLS
JUVENILES
LAKES
LIFE SPAN
PH VALUE
POPULATION DYNAMICS
REPRODUCTION