Do sewage treatment plant discharges substantially impair fish reproduction in polluted rivers?

Jessica D; Robert M; Frdric S; Arnaud B; Delphine L; Jean-Pierre T; Patrick K Unité de Recherches en Biologie des Organismes (URBO), Facultés Universitaires Notre-Dame de la Paix, Rue de Bruxelles, 61, B-5000, Namur, Belgium. [email protected] Sewage treatment plants are frequently associated with the release of xenobiotics and, consequently, with alterations of the reproductive function induced by many of these substances in aquatic organisms. In order to assess the impacts of sewage treatment plant (STP) discharges in polluted rivers, two sentinel species (gudgeon Gobio gobio and stoneloach Barbatula barbatula) were caught during their reproductive cycle upstream and downstream two STPs (STP1--Goffontaine, STP2--Wegnez).

Gonadosomatic index, histological (testicular and ovarian stages, atretic follicles, intersexuality) and endocrine (sex steroids, aromatase activity, alkali-labile phosphorus) parameters were assayed. More.

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