Results 1 to 10 of about 1,651,917 (208)

Phylogeography and population genetic structure of the cardinal tetra (Paracheirodon axelrodi) in the Orinoco basin and Negro River (Amazon basin): evaluating connectivity and historical patterns of diversification [PDF]

PeerJ, 2023
The Neotropics contain one of the most diverse assemblages of freshwater fishes worldwide. Part of this diversity is shared between the Orinoco and Amazon basins.
Diana Sanchez-Bernal, José Gregorio Martinez, Izeni Pires Farias, Tomas Hrbek, Susana Caballero   +4 more
doaj   +3 more sources

Integrative taxonomy reveals two new species of whiptail catfishes Loricaria (Siluriformes: Loricariidae) from northeastern Brazil. [PDF]

J Fish Biol
Abstract Two new species of whiptail catfish, Loricaria (Siluriformes: Loricariidae), were discovered in the Munim and Itapecuru river basins, Maranhão State, northeastern Brazil, through an integrative taxonomic approach combining morphology and mitochondrial DNA.
Serejo-Saraiva AC, Piorski NM, Ottoni FP, Sabaj MH, Lima SMQ.   +4 more
europepmc   +2 more sources

Dispersal Across Headwaters Determines Fish Population Structure Between Interdigitating River Systems in the Guiana Shield Highlands. [PDF]

Ecol Evol
The genetic population structure of riverine fishes is strongly shaped by the architecture of dendritic river networks, which can shift over both contemporary and geological timescales. Such river rearrangements are rarely incorporated into models of riverscape genetics, but they can have a profound effect on fish populations, especially when formerly ...
Morgan TD, Alofs KM, Taphorn DC, Hemraj-Naraine D, Liverpool E, Mol J, Covain R, Lujan NK, López-Fernández H.   +8 more
europepmc   +2 more sources

A new endemic pearl cichlid of the 'Geophagus' brasiliensis (Cichliformes: Cichlidae) species group from the Piranga River, upper Doce River basin, southeastern Brazil. [PDF]

J Fish Biol
Abstract A new species of pearl cichlid of the ‘Geophagus’ brasiliensis species group, endemic to the Piranga River, a major tributary of the upper Doce River basin in the state of Minas Gerais, southeastern Brazil, is herein described. The new species is delimited using an integrative approach, with molecular‐based species delimitation methods coupled
de Assis CE, Dergam JA, Cunha AF, Machado VN, Hrbek T, Vicente NMF, de Queiroz V, Henschel E.   +7 more
europepmc   +2 more sources

Dental Microwear Evidence of Holocene Dietary Variability in the Argentinian Pampas and Paraná Delta. [PDF]

Am J Biol Anthropol
ABSTRACT Objectives This study explores the subsistence strategies of Middle‐to‐Late Holocene human populations in the Argentinean Pampas and Paraná River Delta by analyzing dental microwear patterns. Materials and Methods We examined occlusal molar microwear textures of individuals from the Middle and Late Holocene recovered from 12 archaeological ...
Carvalho MRG, Messineo PG, van Raap MAR, Flensborg G, Martínez G, Scheifler NA, Gonzalez ME, Álvarez MC, Kaufmann CA, Bonomo M, Scabuzzo C, Politis GG, El Zaatari S, Harvati K.   +13 more
europepmc   +2 more sources

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