Results 11 to 20 of about 311 (149)

Redescription of ‘Chasmocranus’ brachynema (Heptapteridae: Heptapterini)

Neotropical Ichthyology
The 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, Veronica Slobodian, Depra Gabriel DE CARVALHO   +2 more
exaly   +7 more sources

Redescription and expansion of the geographic distribution of Phenacorhamdia nigrolineata (Siluriformes: Heptapteridae)

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.
Wolmar Benjamin Wosiacki
exaly   +6 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   +8 more sources

Assessment of total mercury content in fish muscle tissue from the middle basin of the Pastaza River, Ecuador. [PDF]

PLoS One
One of the most toxic metals is mercury, which exhibits high toxicity during short exposure periods. This study aimed to determine the concentration of total mercury (THg) in fish muscle tissue from various species captured from two locations in the ...
Paz-Suconota F, Fernández L, Carpintero-Salvador N, Ruiz-Urigüen M, Brück SA, Galarza FER, Burgos-Morán R, Espinoza-Montero PJ.   +7 more
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, Alberto Luciano Carmassi, Francisco Manoel de Souza Braga   +2 more
doaj   +4 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, DIEGO H.M.D. VIEIRA, VANESSA D. ABDALLAH, RODNEY K. AZEVEDO   +3 more
doaj   +7 more sources

First report of albinism in the South American catfish Imparfinis mirini (Siluriformes: Heptapteridae)

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, Erika R. Ono, Maria Ines B. Alves   +2 more
doaj   +3 more sources