Results 31 to 40 of about 786 (175)

Subchronic effects of dipyrone on the fish species Rhamdia quelen

Ecotoxicology and Environmental Safety, 2011
The use of the non-steroidal anti-inflammatory drugs such as dipyrone is so widespread that this drug and its metabolites have been detected in effluents and surface water. This study aimed to evaluate the potential toxic effects of dipyrone on the aquatic environment, using a native fish species, Rhamdia quelen.
J H, Pamplona, E T, Oba, T A, da Silva, L P, Ramos, W A, Ramsdorf, M M, Cestari, C A Oliveira, Ribeiro, A R, Zampronio, H C Silva, de Assis   +8 more
openaire   +2 more sources

Evidence for the true type-locality of Rhamdia quelen (Siluriformes: Heptapteridae), and the geographical origin and invalid neotype designation of four of its synonyms [PDF]

Neotropical Ichthyology, 2020
Historical information on the probable type-locality of Pimelodus quelen and of its four junior synonyms that share the same neotype, Pimelodus namdia, Pimelodus sebae, Heterobranchus sextentaculatus, and Silurus rivularis, is presented and discussed ...
Stefan Koerber, Roberto E. Reis
doaj   +1 more source

Stress response of Rhamdia quelen to the interaction stocking density – Feeding regimen

General and Comparative Endocrinology, 2023
This study aimed to verify the effect of different feeding and stocking conditions during 14 days on the gene expression of several hormones and enzymes related to the stress cascade and metabolic parameters in silver catfish Rhamdia quelen under the following experimental conditions: 1) fed at low stocking density (2.5 kg m-3, LSD-F); 2) fed at high ...
Hugo Napoleão Pereira da Silva, Ana Paula G. Almeida, Carine de F. Souza, Juan Miguel Mancera, Juan Antonio Martos-Sitcha, Gonzalo Martínez-Rodríguez, Bernardo Baldisserotto   +6 more
openaire   +3 more sources

ASSOCIAÇÃO ENTRE A PRESENÇA DE UM FATOR DE 38 kDa NO PLASMA SEMINAL E A INIBIÇÃO DA MOTILIDADE ESPERMÁTICA NO JUNDIÁ Rhamdia quelen

Ciência Animal Brasileira, 2010
Fatores proteicos tem sido indentificados no plasma seminal de peixes e mamíferos e, em algumas situações, associados com indicadores de qualidade espermática.
Vinicius Farias Campos, Tiago Collares, Fabiana Kömmling Seixas, Cristian Kaefer, Paulo Varoni Cavalcanti, Marta Gonçalves Amaral, Thomaz Lucia Jr., João Carlos Deschamps   +7 more
doaj   +1 more source

Rhamdia quelen Quoy & Gaimard 1824

, 2019
Published as part of Sébastien Brosse, Fréderic Melki & Régis Vigouroux, 2019, Fishes of the Mitaraka Mountains (French Guiana), pp. 131-151 in Zoosystema 41 (8) on page 146, DOI: 10.5252/zoosystema2019v41a8, http://zenodo.org/record ...
Sébastien Brosse, Fréderic Melki, Régis Vigouroux   +2 more
openaire   +2 more sources

Effects of the herbicide atrazine in neotropical catfish (Rhamdia quelen)

Ecotoxicology and Environmental Safety, 2013
The exposure to a world-wide used herbicide atrazine (ATZ) (96h exposure to 2, 10, and 100μgL(-1)), was investigated on the freshwater fish Rhamdia quelen through a multi biomarker approach. Liver histopathology revealed leukocyte infiltration, hepatocyte vacuolization like steatosis and necrosis areas, leading to raised lesion index levels in all ...
M, Mela, I C, Guiloski, H B, Doria, M A F, Randi, C A, de Oliveira Ribeiro, L, Pereira, A C, Maraschi, V, Prodocimo, C A, Freire, H C, Silva de Assis   +9 more
openaire   +2 more sources

Celioscopic liver biopsy in silver catfish (Rhamdia quelen) [PDF]

Pesquisa Veterinária Brasileira, 2015
Endosurgery has been used for assessment of fish celomatic cavity, as well as for obtaining biopsies for organic analysis. Such minimally invasive access may also be used for the analysis of environmental impact on biomarkers of pollution. In Brazil, studies and literature regarding the use of celioscopy in fish are sparse.
Feranti, João P.S., Guimarães, Luciana D., Oliveira, Marília T. de, Hartmann, Hellen F., Souza, Fernando W. de, Corrêa, Luís F.D., Silva, Marco A.M., Brun, Maurício V.   +7 more
openaire   +4 more sources

Salinity on artificial reproduction of silver catfish (Rhamdia quelen) [PDF]

Ciência Rural, 2015
Attempting to improve reproduction performance and ichthyo prophylaxis, this study evaluated the effects of maintaining silver catfish (Rhamdia quelen) broodstock in different saline concentrations (0, 2, 4, 6 and 8‰) on gametes quality and reproductive viability.
Martins, Gabriel Bernardes, Piedras, Sérgio Renato Noguez, Pouey, Juvêncio Luís Osório Fernandes, Bongalhardo, Denise Calisto, Robaldo, Ricardo Berteaux   +4 more
openaire   +4 more sources

Gross brain morphology of Rhamdia quelen (Quoy & Gaimard 1824) (Ostariophysi: Siluriformes: Heptapteridae)

Papéis Avulsos de Zoologia, 2018
The brain gross morphology of Rhamdia quelen is described and compared with seven species of six genera of Heptapteridae. Interspecific variation in shape, size, and position of brain subdivisions was observed in all examined species.
Vitor Pimenta Abrahão, Fábio Müller dos Reis de Salles Pupo, Oscar Akio Shibatta   +2 more
doaj   +1 more source

Fish Assemblages in an Urbanized Neotropical Basin: Influence of Environmental Factors Across Dry and Rainy Periods

International Review of Hydrobiology, Volume 111, Issue 2, December 2026.
ABSTRACT This study investigated the effects of season and environmental disturbances on fish communities in neotropical rivers of the Sorocaba basin, a Sub‐Basin of the Paraná River in Southeast Brazil, based on sampling 1196 individuals from 49 species, including two non‐native and one threatened with extinction.
Natalia S. Alves, Daiane E. Cavallari, Welber S. Smith   +2 more
wiley   +1 more source