Results 11 to 20 of about 3,600 (245)

Dimorfismo sexual em Siluriformes e Gymnotiformes (Ostariophysi) da Amazônia Sexual dimorfism in Amazonian Siluriformes and Gymnotiformes (Ostariophysi) [PDF]

Acta Amazonica, 2005
No presente trabalho é feito um levantamento dos casos de dimorfismo sexual em Siluriformes e Gymnotiformes. Este levantamento se restringe às formas Neotropicais, com ênfase mais especificamente, às da Amazônia.
Lúcia H. Rapp Py-Daniel, Cristina Cox Fernandes   +1 more
doaj   +6 more sources

Data supporting phylogenetic reconstructions of the Neotropical clade Gymnotiformes

Data in Brief, 2016
Data is presented in support of model-based total evidence (MBTE) phylogenetic reconstructions of the Neotropical clade of Gymnotiformes “Model-based total evidence phylogeny of Neotropical electric knifefishes (Teleostei, Gymnotiformes)” (Tagliacollo et
Victor A. Tagliacollo, Maxwell J. Bernt, Jack M. Craig, Claudio Oliveira, James S. Albert   +4 more
doaj   +5 more sources

Species diversity of gymnotiform fishes (Gymnotiformes, Teleostei) in Colombia

Biota Colombiana, 2003
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Javier Alejandro Maldonado-Ocampo, James S. Albert   +1 more
doaj   +2 more sources

Description of Encephalon Morphology of Nile Tilapia Oreochromis niloticus (Linnaeus, 1758) (Perciformes: Cichlidae) From Brazil. [PDF]

Anat Histol Embryol
ABSTRACT The Nile tilapia (Oreochromis niloticus) is a cichlid species native to Africa and is widely farmed in tropical and subtropical regions around the world, making it one of the most commercially important aquaculture species. Despite its significance, there is still a lack of detailed anatomical descriptions of its brain.
Pereira ALS, Sartori E, Campos GM, Ferreira CD, Mendonça PP, Vergilio CDS.   +5 more
europepmc   +2 more sources

Molecular phylogeny reveals a new species of ghost electric knifefish Porotergus Ellis 1912 (Gymnotiformes: Apteronotidae), from the Amazon basin. [PDF]

J Fish Biol
Abstract A new species of ghost electric knifefish, Porotergus sambaibensis sp. nov., is described from the Javaés River, a tributary of the Araguaia River in Brazil. The new species was assigned to the genus Porotergus as the closest relative to Porotergus gimbeli through maximum likelihood reconstruction of a concatenated multilocus dataset ...
Mendonça MB, Peixoto LAW, Chamon CC, Akama A, de Santana CD.   +4 more
europepmc   +2 more sources

Brain Transcriptomics Reveals Molecular Mechanisms of Cave Adaptation in <i>Triplophysa</i> Loaches. [PDF]

Ecol Evol
This study compares brain transcriptomes of cave (Triplophysa shilinensis) and surface‐dwelling (T. xiangshuingensis) loaches to uncover molecular adaptations to subterranean life. We identified widespread gene down‐regulation in the cave ecotype, with enriched pathways in energy metabolism, circadian rhythms, sensory perception, and body coloration ...
Li C, Wu L, Hu F, Chen S, Xiao H.
europepmc   +2 more sources

Small fish, large variation: Morphological diversity of Weberian apparatus in Noturus catfishes and ecological implications. [PDF]

Anat Rec (Hoboken)
Abstract The Weberian apparatus is a hearing specialization unique to the otophysan fishes, and an unexpected degree of morphological variation exists in species of the Noturus catfishes. Our aim in this study is to investigate relationships between morphological variations and ecology that may drive this variation.
Hoeflich JC, Liu J.
europepmc   +2 more sources

The untold story of the caudal skeleton in the electric eel (ostariophysi: gymnotiformes: electrophorus). [PDF]

PLoS ONE, 2013
Alternative hypotheses had been advanced as to the components forming the elongate fin coursing along the ventral margin of much of the body and tail from behind the abdominal region to the posterior margin of the tail in the Electric Eel, Electrophorus ...
Carlos David de Santana, Richard P Vari, Wolmar B Wosiacki   +2 more
doaj   +1 more source

Patterns of diversification and phylogenetic structure in the dorsolateral head musculature of Neotropical electric eels (Ostariophysi: Gymnotiformes), with a myological synonymy

Neotropical Ichthyology, 2022
The present study offers a broad comparative analysis of the dorsolateral head musculature in the Gymnotiformes, with detailed descriptions and illustrations of the dorsolateral head muscles of 83 species representing combined all valid genera.
Luiz Antônio Wanderley Peixoto, Mário de Pinna   +1 more
doaj   +1 more source

ENDOPARASITOS DE Gymnotus sp. (GYMNOTIFORMES: GYMNOTIDAE) DE ISQUEIROS COMERCIAIS NA BACIA DO PANTANAL, BRASIL CENTRAL

Boletim do Instituto de Pesca, 2018
Este estudo avaliou os parasitos endohelmí­­nticos do peixe nativo Gymnotus spp. coletados de diferentes isqueiros comerciais na bacia do Pantanal, Mato Grosso do Sul, Brasil Central.
Arlene Sobrinho VENTURA, Santiago Benites de PÁDUA, Márcia Mayumi ISHIKAWA, Maurício Laterça MARTINS, Ricardo Massato TAKEMOTO, Gabriela Tomas JERÔNIMO   +5 more
doaj   +1 more source