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BIBTEX RIS

Heteromorphic sex chromosomes in three species of the genus <i>Leporinus </i>(Pisces, Anostomidae)

1981; Karger Publishers; Volume: 29; Issue: 3 Linguagem: Inglês

10.1159/000131562

ISSN

1424-8581

Autores

Pedro Manoel Galetti, Fausto Foresti, L.A.C. Bertollo, Orlando Moreira‐Filho,

Tópico(s)

Reproductive biology and impacts on aquatic species

Resumo

The present paper describes three cases of heteromorphic sex chromosomes in fishes of the genus <i>Leporinus </i>(Anostomidae). An XX/XY type was found in <i>Leporinus lacustris </i>and a ZZ/ZW type in <i>L</i>. <i>silvestrii </i>and <i>L</i>. <i>obtusidens</i>. These facts agree with the observations of Ebeling and Chen (1970), who suggested that heterogamety evolved not once but many times among the teleosts.

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