A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Short‐term toxicity test based on algal uptake by Ceriodaphnia dubia
A Ceriodaphnia algal uptake suppression test (CAUST) was developed for short‐term toxicity screening. The test is based on the feeding behavior of C. dubia and requires as little as 1 hour contact time between C. dubia neonates and toxicant. Before the test, neonate digestive tracts were cleared by feeding yeast to the daphnids. Neonates were then exposed to toxicant, followed by addition of Scenedesmus subspicatus to the bioassay vessels. Daphnids were examined under bright‐field microscopy for presence of algae (indicated by a green‐colored digestive tract) or absence of algae. Uptake indicated no toxic effect, whereas absence of uptake indicated toxic inhibition. Median effective concentrations (EC50 values) were computed based on results over a range of dosed toxicant concentrations. Results for cadmium, zinc, copper, pentachlorophenol, phenol, cyanide, and selected pesticides showed that CAUST was similar in sensitivity to the standard 48‐hour C. dubia acute bioassay and was as sensitive as or more sensitive than the 1‐hour I.Q. test and 30‐minute Microtox.
Short‐term toxicity test based on algal uptake by Ceriodaphnia dubia
A Ceriodaphnia algal uptake suppression test (CAUST) was developed for short‐term toxicity screening. The test is based on the feeding behavior of C. dubia and requires as little as 1 hour contact time between C. dubia neonates and toxicant. Before the test, neonate digestive tracts were cleared by feeding yeast to the daphnids. Neonates were then exposed to toxicant, followed by addition of Scenedesmus subspicatus to the bioassay vessels. Daphnids were examined under bright‐field microscopy for presence of algae (indicated by a green‐colored digestive tract) or absence of algae. Uptake indicated no toxic effect, whereas absence of uptake indicated toxic inhibition. Median effective concentrations (EC50 values) were computed based on results over a range of dosed toxicant concentrations. Results for cadmium, zinc, copper, pentachlorophenol, phenol, cyanide, and selected pesticides showed that CAUST was similar in sensitivity to the standard 48‐hour C. dubia acute bioassay and was as sensitive as or more sensitive than the 1‐hour I.Q. test and 30‐minute Microtox.
Short‐term toxicity test based on algal uptake by Ceriodaphnia dubia
Lee, Sang‐III (author) / Na, Eun‐Jung (author) / Cho, Young‐Ok (author) / Koopman, Ben (author) / Bitton, Gabriel (author)
Water Environment Research ; 69 ; 1207-1210
1997-11-01
4 pages
Article (Journal)
Electronic Resource
English
TESTING , CERIODAPHNIA DUBIA , TOXICITY , BIOASSAY , ALGAE
Comparative toxicity of chlorothalonil and chlorpyrifos: Ceriodaphnia dubia and Pimephales promelas
| Online Contents | 2002
Tolerance and acclimation to zinc of Ceriodaphnia dubia
| Online Contents | 2002
A Novel Flow-Through Method for Toxicity Assessments Using Ceriodaphnia dubia
| Online Contents | 1996
Chronic toxicity of parabens and their chlorinated by‐products in Ceriodaphnia dubia
| Online Contents | 2015