Notes on the limnological knowledge of the Paranean gastropods and their trophic relationships I. Ampullarridae

Abstract

The limnological knowledge about the gasteropods of the Paraná River are rather poor, disperse and very diffícult to find and to be applied to the studies related to their múltiple relationships in the aquatic environment, including their participation in the water trophic cycles. Thus, a first approach to a syntesis of the several advances is intended here, in order to center the main problems and estimúlate possible development
ways as well. Aspects with applied interests are also included (fisheries, sanitary problems, weed control). The treatment of each group will be faced separately because of its extention, begining with the present notes on the Ampullaríidae.