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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ref ID : 192

A.Fernandez-Casalderrey, Ferrando, M.D., and Andreu Moliner, E.; Effect of sublethal diazinon concentrations on the demographic parameters of Brachionus calyciflorus Pallas (Rotifera). Bull.Environ.Contam.Toxicol. 48:202-208, 1992

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Short time toxicity tests with high concentrations of the pollutant do not allow predictions which act for a longer period of time. So there is a need for chronic toxicity tests which monitor the toxic effects of a pollutant on different life stages. Rotifers, widely recognized as bioindicators of water quality (Sladecek, 1983), are also ideal bioassay animals for sublethal toxicity tests because of their sensitivity, short generation time, genetic uniformity (due to predominantly parthenogenetic reproduction), and relative ease of culture and maintenance in the laboratory. Furthermore, the fact that rotifers constitute a vital component of freshwater foodwebs (Hutchinson, 1967) makes their selection for bioassy tests an ecologically relevant one. We report here the effect of sublethal levels of diazinon on selected demographic parameters of the freshwater rotifer Brachionus calyciflorus (Pallas).