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The effect of food on the acute toxicity of silver nitrate to four freshwater test species and acute-to-chronic ratios.
MedLine Citation:
PMID:  21779820     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Acute silver toxicity studies were conducted with and without food for four common freshwater test species: Daphnia magna, Ceriodaphnia dubia, Pimephales promelas (fathead minnow-FHM), and Oncorhynchus mykiss (rainbow trout-RBT) in order to generate acute-to-chronic ratios (ACR). The studies were conducted similarly (i.e., static-renewal or flow-through) to chronic/early-life stage studies that were previously performed in this laboratory. The acute toxicity (EC/LC50 values) of silver without food ranged from 0.57 μg dissolved Ag/l for C.dubia to 9.15 μg dissolved Ag/l for RBT. The presence of food resulted in an increase in EC/LC50 values from 1.25× for RBT to 22.4× for C. dubia. Invertebrate food type was also shown to effect acute silver toxicity. Food did not affect EC/LC50s or ACRs as greatly in fish studies as in invertebrate studies. ACRs for both invertebrate species were <1.0 when using acute studies without food but were 1.22 and 1.33 when using acute studies with food. ACRs for FHMs ranged from 4.06 to 7.19, while RBT ACRs ranged from 28.6 to 35.8 depending on whether food was present in acute studies. The data generated from this research program should be useful in re-determining a final ACR for silver in freshwater as well as in risk assessments.
Authors:
Rami B Naddy; Gina R McNerney; Joseph W Gorsuch; Russell A Bell; James R Kramer; Kuen B Wu; Paul R Paquin
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-7-22
Journal Detail:
Title:  Ecotoxicology (London, England)     Volume:  -     ISSN:  1573-3017     ISO Abbreviation:  -     Publication Date:  2011 Jul 
Date Detail:
Created Date:  2011-7-22     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9885956     Medline TA:  Ecotoxicology     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Fort Collins Environmental Toxicology Laboratory, AECOM, 4303 W. LaPorte Avenue, Fort Collins, CO, 80521, USA, rami.naddy@aecom.com.
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