Mise en place d'un élevage de Chironomus riparius Meigen(Diptera, Chironomidae) à l'aval d'une station d'épuration parlagunage

Abstract

A rearing system for Chironomus riparius Meigen has been developed on the outlet channel of the third basin of awaste-lagoon purification station at Baraqueville in the department of Aveyron. A weekly survey of the principal physico-chemical factors was made over a year and facilitated the description of the characteristics and functioning of the rearing system. 51 kg wet weight of larvae have been collected over 183 days of operation (May to October), equivalent to 1.77 kg dry weight ha-1 year-1. Temperature, dissolved oxygen concentration, and sedimentation rate are the principal factorsaffecting production. © Gauthier-Villars, 1992.