Ecotoxicological responses of Planorbarius corneus s. lato allospecies (Mollusca, Gastropoda) from Ukrainian river network to exposure of pesticides

We studied by the laboratory tests impact of most widespread pesticides (insecticide “Actor”, fungicide “Scooter”, herbicide “Titus-C”) in different concentrations (0,001–1000 mg/L) and water on main ecotoxicological indexes genetic vicaristic “western” “eastern” allospecies great ramshorn Planorbarius corneus s. lato. It was established, ranges toxic action these pollutants (mg/L) are following: insecticide – < 0.01–1, 0.1–80, 40–1000 for allospecies, 0.001–1, 0.01–10, 10–1000, respectively, allospecies. By scale ramshorns, toxicants belong to low-toxic (herbicide “Titus C”), strongly (fungicide “Scooter”) highly “Actor”), present following order: > herbicide. Via monitoring behavioral features physiological state mollusсs, we established threshold, sub-lethal, chronic-lethal acute-lethal each examined (mg/L). The length latent period within intoxication process development differed among Under 0,001–10 mg/L, this index higher than (p≤0.05). Adaptation coefficients three categories mollusсs were highest under lowest action, registered earlier Along with increasing concentrations, durability raised both but they appeared one lethal time decreased from lower toxicant used, same it shorter 1–2 hours absolute values toxicity 1.6–10-fold (р≤0.05). certain used toxicants, developed irreversible pathological consisting 5 phases: latent, stimulatory, depressive, sublethal lethal. equal all experiments, mortality that one. a set signs is much more sensitive less adapted environment is, thus tends regress conditions enhanced pollution toxicants. can be consequence arid climate allospecies’ range Left-Bank Ukraine.