Results 1 to 10 of about 1,942 (155)

Reproductive dynamics of Leporinus obtusidens captured downstream from an important hydropower Station in Brazil [PDF]

Arquivo Brasileiro De Medicina Veterinaria E Zootecnia, 2013
This study evaluated the reproductive dynamics and gonadal morphology of piaparas (Leporinus obtusidens) captured downstream from the Funil Hydroelectric Power Station. The 107 piaparas evaluated were captured monthly from Sep 2006 to Aug 2007.
Marcio Zangeronimo, Suely De Fátima Costa, M G Zangeronimo   +2 more
exaly   +13 more sources

Glyphosate on digestive enzymes activity in piava (Leporinus obtusidens) [PDF]

Ciencia Rural, 2014
The effects of glyphosate, a nonselective herbicide (1.0 or 5.0mg L-1) on digestive enzymes activity (stomach and intestine) were evaluated in juveniles of piava (Leporinus obtusidens) after 90 days of exposure.
Carolina Gioda, Vania Lucia Loro, Bernardo Baldisserotto   +2 more
exaly   +7 more sources

Alimentação da piava (Leporinus obtusidens) com diferentes fontes protéicas [PDF]

Ciencia Rural, 2006
A piava (Leporinus obtusidens) é um peixe nativo de grande importância nas bacias hidrográficas do Sul do Brasil. Neste estudo, verificou-se o crescimento de juvenis de piava alimentados durante 60 dias com três dietas contendo diferentes fontes ...
Rafael Lazzari, Fabio de Araújo Pedron
exaly   +6 more sources

External Morphology of Leporinus oliveirai (Characiformes: Anostomidae) During Early Life Stages. [PDF]

J Morphol
Herein, we describe the early development of Leporinus oliveirai, a recently described species, documenting its external morphology with photographs and illustrations. The ontogeny of L. oliveirai is compared with other anostomids and developmental patterns are described for the family.
Ito ISB, Boaretto MP, Venturieri M, Bialetzki A, Birindelli JLO.   +4 more
europepmc   +2 more sources

Cryptic diversity and recent diversification in the Pyrrhulina australis species complex (Characiformes, Lebiasinidae) revealed by mitochondrial DNA. [PDF]

J Fish Biol
Abstract Pyrrhulina australis Eigenmann & Kennedy, 1903, is widely distributed across the main hydrographic basins of South America. The taxonomic integrity of this species is nevertheless challenged by the lack of clear diagnostic characters, its marked geographic variation and the morphological overlap with its congeners. In this context, the present
Souza TB, Ferreira DC, Silva HPD, Machado CB, Oliveira C, Netto-Ferreira AL, Venere PC.   +6 more
europepmc   +2 more sources

Ontogeny of the Skeleton of Leporinus oliveirai (Characiformes, Anotomidae). [PDF]

J Morphol
In this study, we provide the first complete description of the skeleton ontogeny of an anostomid. The developmental sequence of 141 bony elements is described and illustrated. The main discoveries are numerous conical teeth on the premaxilla and dentary that are replaced with three or four large incisiform multicuspid teeth, that become unicuspid in ...
Boaretto MP, Venturieri M, Birindelli JLO.   +2 more
europepmc   +2 more sources

A new species of Leporinus Agassiz, 1829 from the upper Rio Paraná basin (Characiformes, Anostomidae) with redescription of L. elongatus Valenciennes, 1850 and L. obtusidens (Valenciennes, 1837)

Papeis Avulsos De Zoologia, 2012
Leporinus obtusidens Valenciennes, 1837 and L. elongatus Valenciennes, 1850 are redescribed based on the type specimens, including those of their junior synonyms, and recently collected specimens.
José Luís O. Birindelli
exaly   +3 more sources

Chromosome mapping of repetitive sequences in Anostomidae species: implications for genomic and sex chromosome evolution. [PDF]

Mol Cytogenet, 2012
Background Members of the Anostomidae family provide an interesting model system for the study of the influence of repetitive elements on genome composition, mainly because they possess numerous heterochromatic segments and a peculiar system of female ...
da Silva EL, de Borba RS, Parise-Maltempi PP.   +2 more
europepmc   +2 more sources

Substituição de fígado bovino por glúten de milho, glúten de trigo e farelo de soja em rações para pós-larvas de piavas (Leporinus obtusidens) [PDF]

Ciencia Rural, 2005
Este trabalho foi realizado em duas etapas, com o objetivo de avaliar o efeito dos glutens de milho e trigo, e do farelo de soja, em substituição ao fígado bovino no crescimento de pós-larvas de piava (Leporinus obtusidens).
Rafael Lazzari, José Henrique Souza da Silva, Silva José Henrique Souza Da   +2 more
exaly   +3 more sources

Evaluation of trace metals (cadmium, chromium, copper and zinc) in tissues of a commercially important fish (Leporinus obtusidens) from Guaíba Lake, Southern Brazil

Brazilian Archives of Biology and Technology, 2009
Concentrations of Cd, Cr, Cu and Zn were determined in liver and muscle of Leporinus obtusidens. During 2003, the fishes (N = 54) were sampled from three sites along Guaíba Lake (north, central and south zones).
Sandra Maria Hartz
exaly   +3 more sources