Premium
Toxicity of silver sulfide‐spiked sediments to the freshwater amphipod ( Hyalella azteca )
Author(s) -
Hirsch Marianne P.
Publication year - 1998
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620170411
Subject(s) - hyalella azteca , environmental chemistry , sediment , amphipoda , sulfide , ecotoxicology , toxicity , dry weight , bioavailability , crustacean , chemistry , zoology , biology , ecology , botany , paleontology , organic chemistry , bioinformatics
Natural freshwater sediments were spiked in the laboratory with silver sulfide (Ag 2 S), and semistatic toxicity tests were conducted with a series of sediment silver (Ag) concentrations ranging from 1.27 to 753.3 mg/kg of sediment. Water was added to glass beakers containing either the Ag 2 S‐amended or the control sediment. Each of the Ag 2 S‐amended and control sediments was tested in replicates of eight. Ten juvenile Hyalella azteca were added to each beaker at test start. The overlying water was renewed twice daily. The 10‐d 50% lethal concentration value for Ag as Ag 2 S for H. azteca was determined to be >753.3 mg/kg, the highest analyzed concentration tested. There were no statistically significant differences in survival rates of H. azteca exposed to any of the Ag 2 S‐amended sediments when compared to the control. In addition, there were no concentration–response trends for mean survival or average dry weight data from this study, indicating that this form of silver was not bioavailable under these conditions.