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By: Rojas, N. E. T. - Marins, M. A. - Rocha, O.Type: ArticleIn: Instituto Internacional de EcologiaVolume:Series:Issue:Date: 2001-08-01Page Range:Publication Info: Instituto Internacional de Ecologia 2001-08-01Subjects: Abiotic factors egg hatching encysted embryos ephippia Moina micrura