Results 1 to 10 of about 1,227 (168)

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

Arquivo Brasileiro de Medicina Veterinária 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.
E.S. Andrade, V.O. Felizardo, L.D.S. Murgas, M.M. Drumond, M.G. Zangerônimo, S.F. Costa   +5 more
doaj   +15 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

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

Comparative analysis of sex chromosomes in Leporinus species (Teleostei, Characiformes) using chromosome painting. [PDF]

BMC Genet, 2013
BACKGROUND: The Leporinus genus, belonging to the Anostomidae family, is an interesting model for studies of sex chromosome evolution in fish, particularly because of the presence of heteromorphic sex chromosomes only in some species of the genus.
Parise-Maltempi PP, da Silva EL, Rens W, Dearden F, O'Brien PC, Trifonov V, Ferguson-Smith MA.   +6 more
europepmc   +5 more sources

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

Molecular Cytogenetics, 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 Edson Lourenço, de Borba Rafael Splendore, Parise-Maltempi Patrícia Pasquali   +2 more
doaj   +2 more sources

Diel variation in the ascent of fishes up an experimental fish ladder at Itaipu Reservoir: fish size, reproductive stage and taxonomic group influences [PDF]

Neotropical Ichthyology, 2007
In this study, we evaluated the fish ascent in the experimental ladder at Itaipu Reservoir (Paraná State, Brazil), in relation to diel variation, fish size, reproductive stages and species composition.
Domingo Rodriguez Fernandez, Angelo Antonio Agostinho, Luis Mauricio Bini, Fernando Mayer Pelicice   +3 more
doaj   +2 more sources

Evaluation of fish passage through the Igarapé Dam fish ladder (rio Paraopeba, Brazil), using marking and recapture [PDF]

Neotropical Ichthyology, 2007
Rio Paraopeba, a tributary of rio São Francisco, has a six-meter high dam, built in 1978 to divert water to the Igarapé Thermal Power Plant. In 1994, a fish ladder was built at this dam.
Carlos Bernardo Mascarenhas Alves
doaj   +2 more sources

From fresh water to the slope: fish community ecology in the Río de la Plata and the sea beyond [PDF]

, 2010
The spatial pattern of fish assemblages and its relationship with factors along an environment gradient, from fresh to marine water environment along the Río de la Plata estuary (36ºS, 56ºW) the shelf and part of the slope, was examined using data from ...
García, Mirta L., Jaureguizar, Andrés Javier, Protogino, Lucila C.   +2 more
core   +10 more sources

Cross species amplification and characterization of microsatellite markers in Leporinus friderici (Characiformes, Anostomidae) [PDF]

Ciência Rural, 2020
: Leporinus friderici is a migratory neotropical fish with elevated ecological and economic importance in Brazil. Microsatellite markers are highly important in population genetic studies, management, and conservation programs; however, no markers are ...
Caio Felipe da Silva, Diego Galetti Martins, Fernanda Dotti do Prado, Ricardo Utsunomia, Fausto Foresti, Fábio Porto-Foresti   +5 more
doaj   +1 more source

Hematological and Histopathological Changes of Juvenile Grass Carp (Ctenopharyngodon idella) Exposed to Lethal and Sublethal Concentrations of Roundup (Glyphosate 41% SL)

Aquaculture Research, Volume 2023, Issue 1, 2023., 2023
The presence of pesticides and their potential toxic effects on fish can pose a threat to aquatic ecosystems and human health. The present study aimed to evaluate the effect of commercial formulations of glyphosate (Roundup) on the survival rate, hematological parameters, and tissues (gills and liver) of juvenile grass carp (Ctenopharyngodon idella ...
Dariush Azadikhah, Matin Varcheh, Ahmad Mohamadi Yalsuyi, Mohammad Forouhar Vajargah, Mohammad Mansouri Chorehi, Caterina Faggio, Hamed Ghafarifarsani   +6 more
wiley   +1 more source