Dementieva E.V., Likhachev S.F.
MORPHO-PHYSIOLOGICAL ADAPTATIONS OF PERITRICHOUS INFUSORIA TO ATTACHED LIFE STYLE ^{[№ 12 ' 2009]}
Adaptive changes in the size and form of peristome, depending on the object of attachment, the degree of carrier using as a source of food and nutritional conditions of the pond (zone of saprobic) are noted in peritrichous infusoria. With a lack of food resources the species with a wide peristome are dominated. At the improvement of nutrition conditions the size of peristome decreases (mainly in episois and mixobionts).