REPRODUCTIVE BIOLOGY OF <em>Plagioscion squamosissimus</em> (TELEOSTEI, SCIAENIDAE) IN THE BARRA BONITA RESERVOIR, PIRACICABA RIVER, STATE OF SÃO PAULO, BRAZIL

  • Francisco Manoel de Souza Braga UNESP - Rio Claro

Abstract

The reproductive cycle of Plagioscion squamosissimus which takes place in the summer season, November through February, was characterized by intermittent spawning. Twenty-four centimeters was the estimated medium length at the first sexual or gonad maturation for both males and females. Specimens heavier and longer than at the first sexual maturation displayed a lower fertility rate than smaller ones, which was attributed to the adaptation to freshwater reproduction. It was verified that the right ovary is smaller than the left one and contains fewer ovocytes whose growth proved to be similar in both ovaries.

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Author Biography

Francisco Manoel de Souza Braga, UNESP - Rio Claro
Possui graduação em História Natural pela Faculdade de Filosofia Ciências e Letras de Rio Claro (Instituto Isolado) (1973), mestrado em Oceanografia (Oceanografia Biológica) pela Universidade de São Paulo (1978) e doutorado em Oceanografia (Oceanografia Biológica) pela Universidade de São Paulo (1982). Em 1995 prestou concurso para professor livre-docente, tornando-se professor adjunto e em 2005 tornou-se professor titular por concurso pela Universidade Estadual Paulista Júlio de Mesquita Filho. Tem experiência em biologia pesqueira de peixes marinhos e continentais e atualmente tem trabalhado em biologia populacional e ecologia de peixes de riachos Currículo Lattes
Published
2008-07-23
Section
Biological Sciences