Use of Ceriofast™ for Monitoring the Toxicity of Industrial Effluents: Comparison With the 48-H Acute Ceriodaphnia Toxicity Test and Microtox®

Abstract

Abstract-A comparison of an acute 1-h Ceriodaphnia dubia toxicity test (CerioFAST) with Microtox and the standard acute 48-h C. dubia acute toxicity test was undertaken to determine the toxicity of a variety of industrial effluents. CerioFAST is based on suppression of feeding activity of C. dubia in the presence of toxicants and consists of a 1-h-exposure period to a given toxicant followed by a 20-min-feeding period using fluorescent yeast cells. Twenty-eight industrial effluent samples, collected from northern and central Florida, were tested and compared using the CerioFAST and the standard 48-h C. dubia acute toxicity test. The results of the CerioFAST assay were well correlated with the standard 48-h C. dubia test (r 2 ϭ 0.98). Therefore, CerioFAST is useful as a rapid-screening test or range-finding test for assessing the toxicity of environmental samples.

Postexposure Feeding Depression: A New Toxicity Endpoint for Use in Laboratory Studies With Daphnia Magna

“…By exposing Daphnia magna to a range of metals and organic chemicals, Allen et al [11] demonstrated a significant reduction in feeding rates after exposure to all substances tested. Short-term feeding tests have been developed with Ceriodaphnia dubia, and under laboratory conditions have demonstrated contaminant-induced feeding depression after exposure to a range of effluents and toxic substances with different modes of action [12][13][14]. Reductions in feeding * To whom correspondence may be addressed (d.j.baird@stir.ac.uk).…”

Postexposure feeding depression: A new toxicity endpoint for use in laboratory studies with Daphnia magna

“…By exposing Daphnia magna to a range of metals and organic chemicals, Allen et al [11] demonstrated a significant reduction in feeding rates after exposure to all substances tested. Short‐term feeding tests have been developed with Ceriodaphnia dubia , and under laboratory conditions have demonstrated contaminant‐induced feeding depression after exposure to a range of effluents and toxic substances with different modes of action [12–14]. Reductions in feeding rate in these tests can be detected in less than 90 min, thus showing that feeding depression is a rapid, as well as general, indicator of toxic stress.…”