6533b853fe1ef96bd12abf15
RESEARCH PRODUCT
Effect of the insecticide methylparathion on filtration and ingestion rates of Brachionus calyciflorus and Daphnia magna
A. Fernández-casalderreyE. Andreu-molinerM.d. Ferrandosubject
Environmental EngineeringbiologyfungiDaphnia magnaRotiferbiology.organism_classificationPollutionAcute toxicityToxicologyAnimal scienceCladoceraBrachionus calyciflorusEnvironmental ChemistryEcotoxicologyIngestionWaste Management and Disposalreproductive and urinary physiologyEC50description
The freshwater rotifer Brachionus calyciflorus and the cladocera Daphnia magna were exposed to sublethal levels of methylparathion to determine the effect on filtration and ingestion rates. The experiments were performed using the unicellular algae, Nannochloris oculata in a density of 5 × 105 cell/ml. Prior to feeding experiments, preliminary acute toxicity tests were carried out to determine 24-h LC50 values for both species, these values indicated that Daphnia magna was more sensitive to methylparathion acute exposure than Brachionus calyciflorus was. Rates of filtration and ingestion declined with increasing methylparathion concentrations after an exposure of 5 h to this toxicant. The effective concentration at which filtration and ingestion rates were reduced to 50% of those in controls (EC50) were calculed for both species.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-01-01 | Science of The Total Environment |