Resumo

IBANEZ, Ana Laura; GARCIA CALDERON, José Luis  e  TORRES-OROZCO B., Roberto. Reproductive features of the "charal" Menidia jordani (Woolman) from Lake of Metztitlán, Hidalgo. Hidrobiológica [online]. 2008, vol.18, n.1, pp.1-9. ISSN 0188-8897.

Menidia jordani is a silverside species naturally distributed in the Mexican and Lerma drainage areas and has in Metztitlán Lake it most eastern area of distribution in a lentic system. The analysis of the reproductive biology of this species showed that even Metztitlán Lake is the extreme frontier of their distribution conserved its reproduction phenology in relation with other populations. The highest standard length was 58 mm and the length at first sexual maturation was at 43 mm. Sexual ratio inequality was manifested in mayor proportion of females during all collects with exception of January of 2004.

Palavras-chave : Menidia jordani; sexual maturation; phenology; sexual ratio; Barranca de Metztitlán; México Biosphere Reserve.

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