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Hydrobiological Journal
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ISSN Druckformat: 0018-8166
ISSN Online: 1943-5991

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Hydrobiological Journal

DOI: 10.1615/HydrobJ.v36.i1.90
10 pages

Resistance of Oligochaetes of the Family Tubificidae to Organophosphorus Pesticides

L. N. Lapkina
Institute of Inland Waters Biology, Russian Academy of Sciences, Borok, Russia
N. R. Arkhipova
Institute of Inland Waters Biology, Russian Academy of Sciences, Borok, Russia


Nine species of oligochaetes of the family Tubificidae were exposed to solution of organophosphorus pesticides during 48 hours. Thresholds of toxic effects of phosdrin, paraoxon, phosalon, and dichlorovos differ in the species studied, but range within 0.1−1.0 mg/L in general. Alongside with this, there exist also interspecies distinctions in resistance to pesticides as well as in an intensity of biocidal affect; specific sensitivities (ascertained by LC50) range in wider limits, from 0.5 to 120 mg/L. Potamotrix species are less resistant to pesticides used in the experiment than Aulodrilus pluriseta, Tubifex tubifex and species of the genus Limnodrilus. The sensitivity of oligochaetes is compared with that reported in literature on some other worms .

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