Occurrence of Craspedacusta sowerbii (Hydrozoa: Limnomedusae) (Lankester, 1880) at the 14 de Julho reservoir, Rio Grande do Sul, Brazil

Abstract

During the environmental monitoring of 14 de Julho reservoir at Antas river, Cotiporã city, Rio Grande do Sul state, Brazil, was detected a Craspedacusta sowerbii Lankester, 1880 (Hydrozoa: Limnomedusae) bloom at the dammed area of Retiro stream. The samples were collected with a bottle. The individuals were indentified, photographed and added to the Cnidaria collection of the Museu de Ciências Naturais da Fundação Zoobotânica do Rio Grande do Sul. During the bloom the water presented eutrophic conditions and Cryptomonas algae dominance.