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On the reproduction of the silver croaker Plagioscion squamosissimus (Heckel, 1840), in the reservoir of Tucuruí power plant, Pará State, Brazil The reproduction of silver croaker, Plagioscion squamosissimus, was investigated by means of samples derived from monthly catches in the the reservoir of Tucuruí power plant, Pará State, Brazil, in the years 2001 and 2002. Gill nets were used as fishing gear and, at laboratory, the fish were submitted to biometric measurement, and identification of the sex and gonad maturity stages. Predominance of females, with statistical significance, was registered in all months but February and November of 2002, and also for all size classes, especially from 51 cm TL onwards due to 1 Engenheiro de Pesca Projeto Piatam mar II E-mail: jossandrarocha@hotmail.com 2 Analista de Meio Ambiente das Centrais Elétricas do Norte do Brasil S.A. 3 Professor da UFRA Pesquisador Cepnor/Ibama

boletim técnico-científico do cepnor

A REPRODUÇÃO DA PESCADA-BRANCA Plagioscion squamosissimus (HECKEL, 1840) (PERCIFORMES: SCIAENIDAE) NO RESERVATÓRIO DA USINA HIDRELÉTRICA DE TUCURUÍ (PARÁ-BRASIL)