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Issue: Vol. 1707 No. 1: 20 Feb. 2008
Type: Article
Published: 2008-02-20
DOI: 10.11646/zootaxa.1707.1.3
Page range: 37–48
Abstract views: 81
PDF downloaded: 51

Morphological development of Hypophthalmus fimbriatus and H. marginatus post-yolk-sac larvae (Siluriformes: Pimelodidae)

Núcleo de Pesquisas em Ictioplâncton (NUPIC)/Laboratório de Ecologia III/Depto. de Biologia/ICB/Universidade Federal do Amazonas. Av. Gal. Rodrigo Otávio, 3000, bloco E, CEP 69077-000, Manaus-Amazonas
Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupélia)/Pós-Graduação em Ecologia de Ambientes Continentais/Depto. de Biologia/Universidade Estadual de Maringá (UEM). Av. Colombo, 5790, bloco G-90, CEP 87020-900, Maringá, PR
Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupélia)/Pós-Graduação em Ecologia de Ambientes Continentais/Depto. de Biologia/Universidade Estadual de Maringá (UEM). Av. Colombo, 5790, bloco G-90, CEP 87020-900, Maringá, PR
Fish mapará morphological description larval development rio Negro Amazon

Abstract

Descriptions of stages in the larval development of two sympatric and congeneric freshwater fishes from the rio Negro (Amazon basin), Hypophthalmus fimbriatus and H. marginatus, are presented. Larval development is described in terms of ontogenetic changes in morphology, pigmentation and fin development. Developmental changes during the larval period of the two species are similar, but they can be separated mainly by the following variables: eye diameter, head width, body depth and pre-pectoral distance. Aspects of their reproduction strategies are also discussed.

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