Results 21 to 30 of about 6,049 (231)

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.
L. Peixoto, M. D. De Pinna
semanticscholar   +1 more source

Osteology of the cranium and Weberian apparatus of African catfish families (Teleostei: Ostariophysi: Siluriformes) with an assessment of Palaeogene genera

Vertebrate Anatomy Morphology Palaeontology, 2022
Although the vast majority of fossil catfish material is isolated elements such as fin spines, a number of fossil catfishes (Siluriformes) have been named based on articulated crania from Palaeogene formations of Africa.
Alison M. Murray, R. Holmes
semanticscholar   +1 more source

Ontogeny of the specificity of gonadotropin receptors and gene expression in carp

Endocrine Connections, 2019
The pituitary gonadotropins, luteinizing hormone (LH) and follicle-stimulating hormone (FSH), are the principle endocrine drivers of reproductive processes in the gonads of jawed vertebrates.
Lian Hollander-Cohen, Benjamin Böhm, Krist Hausken, Berta Levavi-Sivan   +3 more
doaj   +1 more source

A taxonomic review of the Neotropical electric fish Rhamphichthys (Gymnotiformes: Rhamphichthyidae) [PDF]

Neotropical Ichthyology, 2023
The species diversity and taxonomy of Rhamphichthys is reviewed and seven species are considered valid: Rhamphichthys apurensis from the Orinoco and Cuyuni river basins; R. drepanium from the Amazon and Orinoco river basins; R.
Tiago P. Carvalho, James S. Albert
doaj   +1 more source

Evaluación de cuatro anestésicos en peces cebo de agua dulce (Cheirodon interruptus) (Ostariophysi: Characidae)

Revista de Investigaciones Veterinarias del Perú, 2022
El estudio tuvo como objetivo evaluar la respuesta del eugenol, propofol, isofluorano y lidocaína sobre variables fisiológicas y anestesiológicas de Cheirodon interruptus, el pez cebo de mayor utilización en Argentina. Se conformaron seis grupos: eugenol
Natalia Urzúa Pizarro, M. Mancini, María Jimena Messina, Carlos Errecalde, V. Salinas, Carlos Lüders, Guillermo Prieto   +6 more
semanticscholar   +1 more source

Filling gaps in the ecological knowledge on Auchenipteridae catfishes (Ostariophysi: Siluriformes): first data for Trachelyichthys exilis

Acta Amazonica, 2022
The feeding habit of Trachelyichthys exilis is described for the first time, with additional comments on its growth type and size at sexual maturity.
T. Freitas, J. Zuanon
semanticscholar   +1 more source

New species of Curimatopsis from the río Caroni, Orinoco basin, Venezuela, with comments on C. macrolepis (Characiformes: Curimatidae) [PDF]

Neotropical Ichthyology, 2020
A new species of Curimatopsis is described from the highlands of the western Guiana Shield in the río Carapo and río Paragua, tributaries of the río Caroni in the Orinoco basin, southeastern Venezuela.
Bruno F. Melo
doaj   +1 more source

Molecular cloning, sequencing and tissue expression of vasotocin and isotocin precursor genes from Ostariophysian catfishes: Phylogeny and evolutionary considerations in teleosts

Frontiers in Neuroscience, 2015
Basic and neutral neurohypophyseal (NH) nonapeptides have evolved from vasotocin (VT) by a gene duplication at the base of the gnathostome lineage. In teleosts, VT and IT are the basic and neutral peptides, respectively.
Putul eBanerjee, Radha eChaube, Keerikkattil Paily Joy   +2 more
doaj   +1 more source

Integrative taxonomy reveals a new species of Neotropical headstanding fish in genus Schizodon (Characiformes: Anostomidae)

Neotropical Ichthyology, 2021
Schizodon encompasses approximately 15 species of Neotropical headstanding fishes. Integrative taxonomy, combining molecular and morphometric analyses with traditional taxonomic methods, was used to investigate Schizodon vittatus and its potential new ...
Júlio C. Garavello, Jorge L. Ramirez, Alexandre K. de Oliveira, Heraldo A. Britski, José L. O. Birindelli, Pedro M. Galetti Jr   +5 more
doaj   +1 more source

A case of intersex occurrence in Steindachneridion parahybae (Steindachner, 1877) (Siluriformes: Pimelodidae) under captivity condition: A cytogenetic and morphological study [PDF]

, 2016
Poco se sabe sobre la biología reproductiva de Steindachneridion parahybae , una especie de teleósteo gonocorístico en peligro de extinción que habita la cuenca del río Paraíba do Sul y en éste trabajo se describe por primera vez la aparición de ...
Caneppele, Danilo, Honji, Renato Massaaki, Lo Nostro, Fabiana Laura, Moreira, Renata G., Pandolfi, Matias   +4 more
core   +2 more sources