Chronic sublethal effects of San Francisco Bay sediments on nereis (neanthes) arenaceodentata; effect of food ration on sediment toxicity. Final report
This report is designed to address concerns regarding the effect of food ration on toxicity during chronic sublethal sediment bioassays. To this end, a contaminated San Francisco Bay sediment and a clean control sediment were evaluated in a chronic sublethal test under a series of different food rations, with the marine polychaete worm Nereis (Neanthes) arenaceodentata. Animals were exposed from early juvenile stage through the onset of gametogenesis. Treatments were 2.OX, 1.OX, 0.5X, and 0.25X where X is the recommended food ration for laboratory cultures. Test end points were survival, growth, and reproduction. The contaminated sediment was a composite of several cores taken to project depth (38 ft (11.6 m) below mean low water mark) from an area in Oakland Inner Harbor known to be contaminated with polycyclic aromatic hydrocarbons and metals. Comparisons were made with a clean control sediment. The control sediment is used in the laboratory cultures of N. arenaceodentata and was collected from Sequim, WA. Mean percent survival of Neanthes was high (>90 percent) in both the contaminated and control sediment across all food ration treatments. Individual wet weights were significantly reduced with decreasing food ration in both contaminated and control sediments. Significant differences in wet weight between sediment types were observed at the 1.OX, 0.5X, and 0.25X rations. Reproduction (fecundity and emergent juvenile (EJ) production) was also Chronic sublethal, Neanthes, Dredged material, San Francisco Bay, Food ration, Sediment.
- Research Organization:
- Army Engineer Waterways Experiment Station, Vicksburg, MS (United States). Environmental Lab.
- OSTI ID:
- 5634467
- Report Number(s):
- AD-A-269901/5/XAB; WES/MP/D--93-4
- Country of Publication:
- United States
- Language:
- English
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63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
AROMATICS
ASCHELMINTHES
BIOASSAY
BIOLOGICAL EFFECTS
CHALCOGENIDES
CONTAMINATION
DATA
ELEMENTS
ENVIRONMENTAL EFFECTS
EVALUATED DATA
FOOD
GAMETOGENESIS
HARBORS
HELMINTHS
HYDROCARBONS
INFORMATION
LABORATORIES
METALS
NEMATODES
NUMERICAL DATA
ORGANIC COMPOUNDS
PACIFIC OCEAN
PARASITES
POLLUTION
POLYCYCLIC AROMATIC HYDROCARBONS
REPRODUCTION
SAN FRANCISCO BAY
SEAS
SEDIMENTS
STATISTICAL DATA
SULFIDES
SULFUR COMPOUNDS
SURFACE WATERS
TOXICITY
WATER POLLUTION