Ref ID : 128
M.D. Ferrando and E. Andreu-Moliner; Acute lethal toxicity of some pesticides to Brachionus calyciflorus and Brachionus plicatilis. Bull.Environ.Contam.Toxicol. 47:479-484, 1991
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Due to their widespread distribution and toxin nature pesticides may have a serious impact on the aquatic environment and exert adverse effects on the associated organisms. Acute bioassy tests have been used to determine the actual impact of various pesticides on aquatic life. Static acute toxicity tests provide rapid and reproductible concentration-response curves for estimating toxic effects of chemicals on aquatic organisms. These tests provide a data base for determining relative toxicity to a variety of species. Data on sensitivity to pesticides for zooplankton species, in laboratory controlled conditions, is mainly reported to crustaceans, existing a lot of information on daphnids. However, a few information about controlled bioassays conducted with rotifers is available. Brachionus calyciflorus and Brachionus plicatilis are particularly useful for environmental toxicology because of their rapid reproduction, short generation time, cosmopolitan distribution and the commercial availability of the dormant eggs (cysts). The present study was conducted to determine the acute toxicological effects of some pesticides (trichlorfon, fenitrothion, chlorpyrifos, lindane and 3,4-dichloroaniline (3,4-DCA)) on B. calyciflorus and B. plicatilis. These two zooplanktonic species were tested to elucidate sensitivity differences between freshwater and brackish environment rotifers.