Use of estuarine water column tests for detecting toxic conditions in ambient areas of the Chesapeake Bay watershed
- Univ. of Maryland System, Queenstown, MD (United States)
Various estuarine water column toxicity tests were conducted twice in nine different ambient stations in the Chesapeake Bay watershed over a 2-year period (1991 to 1993) to determine if toxic conditions existed. The following 8-d toxicity tests were conducted: larval sheepshead minnow (Cyprinodon variegatus) survival and growth test; larval grass shrimp (Palaemonetes pugio) survival and growth test; and a copepod (Eurytemora affinis) life-cycle test. During the second year of testing, two 48-h coot clam (Mulinia lateralis) tests were conducted at each station during each testing period. In 1991, the toxicity tests were conducted twice at stations in the Potomac River at Morgantown and Dahlgren, and in the Patapsco River and the Wye River at the Manor House. All of the above tests were conducted during the fall of 1992 and spring of 1993 at two stations in the Wye River, Nanticoke River, and Middle River. Inorganic contaminants, organic contaminants, and water-quality conditions were measured concurrently during the toxicity testing of ambient water. In 1991, reduced growth of sheepshead minnow larvae was reported at both Potomac River stations during the first test. Significant mortality of either the copepod or sheepshead minnow larvae was also reported at the Wye River during both tests. Results from the 1992/93 testing generally showed minimal effects for three of the test species at all stations. Reduced normal shell development was reported for the coot clam at both Middle River stations during the fall and spring tests concurrently with concentrations of various trace metals that exceeded chronic marine water-quality criteria.
- OSTI ID:
- 6527528
- Journal Information:
- Environmental Toxicology and Chemistry; (United States), Vol. 14:2; ISSN 0730-7268
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
CHESAPEAKE BAY
WATERSHEDS
CLAMS
SENSITIVITY
CRUSTACEANS
FISHES
INORGANIC COMPOUNDS
TOXICITY
ORGANIC COMPOUNDS
WATER POLLUTION
SHRIMP
ANIMALS
AQUATIC ORGANISMS
ARTHROPODS
ATLANTIC OCEAN
BAYS
COASTAL WATERS
DECAPODS
INVERTEBRATES
MOLLUSCS
POLLUTION
SEAS
SURFACE WATERS
VERTEBRATES
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)
560300 - Chemicals Metabolism & Toxicology