Results 41 to 50 of about 12,886 (218)
Acta Amazonica, 2004 As enchentes anuais dos rios na Amazônia alagam extensas áreas de floresta conhecidas como várzeas ou igapós. Estas áreas têm papel importante na vida dos peixes da região, pois são fontes de alimento e de abrigo.
Luiz Claro-Jr +3 more
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Zygoparity in Characidae - the first case of internal fertilization in the teleost cohort Otomorpha [PDF]
Neotropical Ichthyology, 2020 Most teleosts are externally fertilizing, with internal fertilization occurring as a relatively rare event. Until now, Euteleosteomorpha is the only teleost cohort known to undergo internal fertilization.
Clayton Kunio Fukakusa +2 more
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Astyanax pampa (Characiformes, Characidae), a
Revue suisse de zoologie, 2005 (Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Jorge R. Casciotta +2 more
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Chromosomal characterization of three species of Serrasalmini (Serrasalmidae: Characiformes)
Genetics and Molecular Biology, 2023 The tribe Serrasalmini is a diverse group with paraphyletic genera and taxonomic uncertainties. Several studies have been carried out in this group of fish in order to understand this problem, including the cytogenetic approach. In this study, three species of a clade of Serrasalmini were characterized cytogenetically - Pristobrycon striolatus ...
Alan Gomes dos Santos +4 more
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Fishes from the Río Alvarado drainage, Upper Río Magdalena Basin, Colombia [PDF]
Check List, 2020 An annotated list of the freshwater fishes of the Río Alvarado drainage, Upper Río Magdalena Basin is presented. Fishes were captured from nine localities, quarterly sampled between September 2012 and July 2013.
Juan G. Albornoz-Garzón +4 more
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First study on parasites of Hemibrycon surinamensis (Characidae), a host from the eastern Amazon region. [PDF]
, 2019 This study was the first investigation of communities and infracommunities of parasites of Hemibrycon surinamensis. All the fish collected in a tributary of the Amazon river were parasitized by one or more parasite species. The Brillouin diversity index (
DIAS, M. T. +2 more
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Morphology, molecules and the phylogeny of Characidae (Teleostei, Characiformes) [PDF]
Cladistics, 2018 AbstractThis is the most comprehensive phylogenetic analysis of the Characidae to date and the first large‐scale hypothesis of the family, combining myriad morphological data with molecular information. A total of 520 morphological characters were analysed herein, of which 98 are newly defined.
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PLoS ONE, 2013 Fishes of the order Characiformes are a diverse and economically important teleost clade whose extant members are found exclusively in African and Neotropical freshwaters. Although their transatlantic distribution has been primarily attributed to the Early Cretaceous fragmentation of western Gondwana, vicariance has not been tested with temporal ...
Jairo Arroyave +2 more
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The efficiency of spermatogenesis and the support capacity of Sertoli cells in Characiformes [PDF]
Theriogenology, 2017 This stereological analysis of the types of germ cells and the number of Sertoli cells per cyst in Astyanax altiparanae testes during spermatogenesis is the first such report in Characiformes. Testes of 25 male A. altiparanae were examined. Based on the number of spermatogonia B per cyst (469.2 ± 9.92), we estimated that spermatogonia undergo at least ...
Rodrigues, Maira da Silva +4 more
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Ocorrência de ovos e larvas de Characiformes migradores no Rio Negro, Amazonas, Brasil [PDF]
Acta Amazonica, 2002 A ocorrência de ovos e larvas de sete espécies de Characiformes migradores em estágio de larval vitelino, pré-flexão e flexão, é descrita pela primeira vez para o rio Negro. É discutida a possibilidade de desova dessas espécies neste sistema pela fase de
Edinbergh Caldas de OLIVEIRA +1 more
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