Sensitivity of Baikal and non-Baikal amphipods to some components of water environment

The responses of same Baikal and non-Baikal amphipods to hydroperoxide and humic acids were studied. Hydroperoxide was supposed to decrease the toxicity of para-benzoquinone which is more toxic for amphipods than hydroquinone. The concentrations of humic acids inducing avoidance were lower for The Lake Baikal than in case of golarctic species Gammarus lacustris. At the same time Baikal species preferred lower level of humic acids than non-Baikal species. The experiments with hydroperoxide showed opposite trends. Attractive properties of hydroperoxide was higher for Baikal species than G. lacustris.