Results 11 to 20 of about 1,833 (196)
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 +2 more
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Redescription of ‘Chasmocranus’ brachynema (Heptapteridae: Heptapterini)
Neotropical IchthyologyThe endangered species ‘Chasmocranus’ brachynema is redescribed and diagnosed among other Heptapterini by having the adipose fin extensively fused with the caudal fin, caudal fin shallowly bifurcate, and anal-fin insertion posterior to a vertical through
Gabriel de Carvalho Deprá +1 more
doaj +3 more sources
Molecular characterization of the progenetic metacercariae Crocodilicola pseudostoma parasitizing Rhamdia quelen (Siluriformes, Heptapteridae) in Brazil [PDF]
Anais da Academia Brasileira de Ciências, 2020 The trematodes have developed several adaptations and strategies to complete their life cycle in the intermediate host, without even reaching the definitive host.
DÉBORA C. NEGRELLI +3 more
doaj +8 more sources
Neotropical Ichthyology, 2023 Phenacorhamdia nigrolineata is redescribed, and the expansion of its geographic distribution is presented based on abundant new records. Morphological analysis, meristic comparison and osteological description were performed.
Íthalo da Silva Castro +1 more
doaj +3 more sources
Hearing in catfishes: 200 years of research. [PDF]
Fish Fish (Oxf), 2023 Abstract Ernst Weber stated in 1819, based on dissections, that the swimbladder in the European wels (Silurus glanis, Siluridae) and related cyprinids serves as an eardrum and that the ossicles connecting it to the inner ear function as hearing ossicles similar to mammals. In the early 20th century, K.
Ladich F.
europepmc +2 more sources
Biological information of Taunayia bifasciata (Siluriformes: Heptapteridae): a threatened and unknown catfish [PDF]
Zoologia (Curitiba), 2011 Taunayia bifasciata (Eigenmann & Norris, 1900) is a small catfish that inhabits headwater streams of the Tietê and Paraíba do Sul river basins, southeastern Brazil, being restricted to the Atlantic rain forest. The species is found on lists of threatened
Giulianna Rondineli +2 more
doaj +4 more sources
Integrative morphometric and molecular analyses reveal possible genetic contamination of silver catfish populations of the genus Rhamdia in Neotropical River basins. [PDF]
J Fish BiolAbstract Rhamdia quelen, Rhamdia branneri and Rhamdia voulezi are morphologically similar species that, until recently, were considered synonymous. Although R. quelen has wide distribution in the Neotropical region, R. branneri and R. voulezi are sympatric and endemic species of the Iguaçu River basin.
Bignotto TS +4 more
europepmc +2 more sources
A new species of Gladioglanis Ferraris & Mago-Leccia from rio Aripuanã, Amazonas, Brazil (Siluriformes: Heptapteridae) [PDF]
Neotropical Ichthyology, 2008 A new species of Gladioglanis is described from a single locality on rio Aripuanã, rio Madeira basin, and can be distinguished from its congeners by the following characters: dorsal-fin spine and spinelet absent, first dorsal-fin ray flexible, unbranched,
Marcelo Salles Rocha +2 more
doaj +4 more sources
Revista Mexicana de Biodiversidad, 2017 Albinism is a genetic condition caused by an autosomal recessive gene that affects normal pigmentation in animals. In Neotropical freshwater fish fauna, albinism cases are extremely rare, with only 14 species recorded among more than 6,000 described ...
Pedro S. Manoel +2 more
doaj +3 more sources
Hydrological Connectivity Enhances Fish Biodiversity in Amazonian Mining Ponds: Insights From eDNA and Traditional Sampling. [PDF]
Mol EcolABSTRACT Artisanal and small‐scale gold mining (ASGM) expansion in the Madre de Dios region of the Peruvian Amazon has transformed primary forests into a novel wetland complex of thousands of abandoned mining ponds. Despite their ecological relevance, post‐mining recovery of these systems remains understudied, particularly regarding fish biodiversity ...
Timana-Mendoza C +7 more
europepmc +2 more sources