About correlashion of cold-preferability and oxiphility of endemic and Siberian hydrobionts

Ecological features of several groups invertebrates animal reservoirs of Baikal and Siberian fauna are analysed. It is shown, that in relation to the some stressfully factors to agents hydrobionts occupying non-Baikalian reservoirs and water-currents are less steady, than representatives of the Baikal fauna. Some of hypotheses put forward for an explanation of process «immicibility» Baikal and non-Baikalian kinds hydrobionts are put under doubt.