Results 61 to 70 of about 2,449 (227)

Parasitism by Clinostomum marginatum (Clinostomidae) in neotropical electric fish (Gymnotiformes) in the Brazilian Amazon

, 2020
Gymnotiformes are currently recognized as electric fish, the vast majority of which emit low power electrical discharges. Clinostomum trematodes have been the subject of numerous investigations in several host species due to the ability of metacercariae ...
Corrêa, Lincoln Lima, Nogueira, Adília, Chagas de Souza, Darlison   +2 more
core   +1 more source

Description of a new species of glass knifefish genus Eigenmannia (Gymnotiformes: Sternopygidae) from the rio Negro basin, Brazil

Neotropical Ichthyology
A new species of Eigenmannia is described from the rio Negro basin, Brazil, based on both morphological and molecular datasets. It is distinguished from all congeners by the following combination of characters: subterminal mouth, absence of lateral-line ...
Maria Isabela Moreira Uliam, H. Ribeiro, G. Dutra   +2 more
semanticscholar   +1 more source

Diagnosis and Off‐Label Treatment of Subcutaneous Putative Dracunculoid Nematodes in Apteronotus albifrons Originating From Wild‐Caught Fisheries

Journal of Fish Diseases, EarlyView.
ABSTRACT Apteronotus albifrons (Gymnotiformes: Apteronotidae), commonly known as the black ghost knifefish, is a high‐value ornamental fish that is susceptible to various parasites. The affected fish were wild‐caught fisheries and subsequently introduced into a commercial breeding system.
Pedro Henrique Magalhães Cardoso, Simone de Carvalho Balian, Herbert Sousa Soares, Marcelo Bahia Labruna, Gracienhe Gomes dos Santos, José Blanchard Girão Ribeiro Filho, Mauricio Laterça Martins   +6 more
wiley   +1 more source

Sensoriamento ambiental com gymnotiformes (pisces). [PDF]

, 2010
A Amazônia Brasileira contém a maior diversidade conhecida de peixes da Ordem Gymnotiformes. Estes peixes elétricos, como são popularmente conhecidos, têm sido intensamente estudados por causa de sua capacidade bioelétrica. Em função destes dois fatores,
http://lattes.cnpq.br/6768576719778466, Schwertner Filho, Gilberto   +1 more
core  

First record of supernumerary (B) chromosomes in electric fish (Gymnotiformes) and the karyotype structure of three species of the same order from the upper Paraná River basin

Comparative Cytogenetics, 2012
Cytogenetic studies were performed on the species Apteronotus prope albifrons Linnaeus, 1766, Rhamphichthys hahni Meinken, 1937 and Brachyhypopomus gauderio Giora & Malabarba, 2009, collected in the upper Paraná River floodplain, Porto Rico ...
Valéria Mendes, Ana Luiza Portela-Castro, Horácio Júlio-Júnior   +2 more
doaj   +1 more source

Microsternarchus javieri, a new species of weakly electric fish (Gymnotiformes: Hypopomidae, Microsternarchini) from the Negro River basin, Amazonas, Brazil

Acta Amazonica
Here we describe a new hypopomid species, Microsternarchus javieri n. sp., encountered in flooded savanna streams of the Branco River and in terra-firme streams in the mid- and lower portions of the Negro River basin. We compared this new species with M.
Carolina Escamilla Pinilla, Cristina Cox Fernandes, J. Alves-Gomes   +2 more
semanticscholar   +1 more source

Description of three new species of Eigenmannia (Gymnotiformes: Sternopygidae) from the rio Mearim and rio Parnaíba basins, Northeastern Brazil

Neotropical Ichthyology, 2022
Three new species of Eigenmannia belonging to the E. trilineata species-group are described. The first species is described from rio Mearim basin and can be diagnosed by lateral line stripe restricted to last two thirds of body, superior midlateral ...
G. Dutra, T. Ramos, N. Menezes
semanticscholar   +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

Electric imaging through evolution, a modeling study of commonalities and differences. [PDF]

PLoS Computational Biology, 2014
Modeling the electric field and images in electric fish contributes to a better understanding of the pre-receptor conditioning of electric images. Although the boundary element method has been very successful for calculating images and fields, complex ...
Federico Pedraja, Pedro Aguilera, Angel A Caputi, Ruben Budelli   +3 more
doaj   +1 more source

Life history traits of the glass knifefish Eigenmannia desantanai (Gymnotiformes: Sternopygidae) in the Southern Pantanal, Brazil

Acta Limnologica Brasiliensia
Aim This study investigated life-history traits of Eigenmannia desantanai in the southern Pantanal floodplain. Methods Fish were collected beneath stands of aquatic macrophytes using seine nets and rectangular sieves with a 2 mm mesh size in the Paraguay
K. K. Tondato-Carvalho, Mateus de Souza Jeronymo, P. L. Rondon, É. J. Gouveia, Francisco Severo-Neto, Y. Súarez   +5 more
semanticscholar   +1 more source