Results 21 to 30 of about 1,484 (195)

Application of a deep learning image classifier for identification of Amazonian fishes. [PDF]

Ecol Evol, 2023
To address the growing prevalence of large ecological datasets combined with a need for rapid species identification tools, we describe a novel application of a computer vision model, which is built to rapidly identify Amazonian fishes from captured image data.
Robillard AJ, Trizna MG, Ruiz-Tafur M, Dávila Panduro EL, de Santana CD, White AE, Dikow RB, Deichmann JL.   +7 more
europepmc   +2 more sources

The simple morphology of the sunfish heart. [PDF]

J Anat
Jensen and Lauridsen describe the least curved vertebrate heart to date in seven specimens of Ocean sunfish. By comparison to multiple vertebrates, it is concluded that the highly unusual heart is a recent evolution that relates in part to the extraordinary shape of the body.
Jensen B, Lauridsen H.
europepmc   +2 more sources

Linking rivers, mixing faunas: How artificial connectivity between the Middle and Upper Paraná River basins shapes fish diversity in a tributary of the Itaipu Reservoir, Brazil. [PDF]

J Fish Biol
Abstract This work aimed to investigate the distribution and occurrence of fish species along the São Francisco Falso Braço Norte (SFFBN) River basin, a tributary of the Middle Paraná River basin now artificially connected to the Upper Paraná ecoregion, to evaluate how such connectivity may affect the biogeographic distribution and regional composition
Kampfert LEP, Maicrovicz JC, Blanco DR, Lange D, Pavanelli CS, Brandão H.   +5 more
europepmc   +2 more sources

Impoundment effects in the population of Auchenipterus osteomystax (Siluriformes: Auchenipteridae): a Neotropical reservoir case

Revista de Biología Tropical, 2012
New impoundments provide opportunities to check whether species that present enough feeding flexibility in natural conditions may take advantage of this situation and, without reproductive restriction, can occupy the most conspicuous habitat in a large ...
Elcio Barili, Rosemara Fugi, Gisele Caroline Novakowski, Angelo Antonio Agostinho   +3 more
doaj   +5 more sources

Cephalic Musculature of the Pacman Catfish Lophiosilurus alexandri Steindachner, 1876 (Siluriformes, Pseudopimelodidae). [PDF]

J Morphol
The head of the Pacman catfish (Lophiosilurus alexandri [L. alexandri]) is strongly depressed, broad, and with a large mouth, roughly resembling those of Lophius piscatorius and Chaca bankanensis. Also, they are bottom dwellers and have ambush behavior for fish predation.
da Silva Marques R, Ohara I, Shibatta OA.   +2 more
europepmc   +2 more sources

Quantifying shortfalls in the knowledge on Neotropical Auchenipteridae fishes [PDF]

Fish and Fisheries, 2020
AbstractThe Neotropics harbour the greatest diversity of freshwater fish on Earth. Despite recent advances in characterizing the fish fauna, the total number of species, distributional range, evolution and ecological traits remain uncertain. Thus, we quantify shortfalls in the knowledge of taxonomy (Linnean shortfall), geographic distribution ...
Tiago Magalhães da Silva Freitas, Juliana Stropp, Bárbara Borges Calegari, Joaquín Calatayud, Paulo De Marco, Luciano Fogaça de Assis Montag, Joaquín Hortal   +6 more
openaire   +2 more sources

Karyotypic variation of Glanidium ribeiroi Haseman, 1911 (Siluriformes, Auchenipteridae) along the Iguazu river basin [PDF]

Brazilian Journal of Biology, 2015
The Iguazu river is a tributary of the left margin of the Paraná river, isolated from this basin about 22 million years ago with the appearance of the Iguazu Falls.
R. L. Lui, D. R. Blanco, J. B. Traldi, V. P. Margarido, O. Moreira-Filho   +4 more
doaj   +4 more sources

Rio Doce Acoustic Surveys of Fish Biomass and Aquatic Habitat. [PDF]

Integr Environ Assess Manag, 2020
ABSTRACT Following the failure of the Fundão mine tailings dam in Brazil, approximately 32 million cubic meters of Fe ore tailings were released into the downstream riverine system. The postevent monitoring surveys implemented the use of noninvasive acoustic methods to improve the understanding of the fish biomass distribution patterns and aquatic ...
Hobbs D, Bigot M, Smith REW.
europepmc   +2 more sources

Conservation threats and future prospects for the freshwater fishes of Ecuador: A hotspot of Neotropical fish diversity

Journal of Fish Biology, Volume 99, Issue 4, Page 1158-1189, October 2021., 2021
ABSTRACT Freshwater fish communities in Ecuador exhibit some of the highest levels of diversity and endemism in the Neotropics. Unfortunately, aquatic ecosystems in the country are under serious threat and conditions are deteriorating. In 2018–19, the government of Ecuador sponsored a series of workshops to examine the conservation status of Ecuador's ...
Windsor E. Aguirre, Gabriela Alvarez‐Mieles, Fernando Anaguano‐Yancha, Ricardo Burgos Morán, Roberto V. Cucalón, Daniel Escobar‐Camacho, Iván Jácome‐Negrete, Pedro Jiménez Prado, Enrique Laaz, Katherin Miranda‐Troya, Ronald Navarrete‐Amaya, Fredy Nugra Salazar, Willan Revelo, Juan F. Rivadeneira, Jonathan Valdiviezo Rivera, Edwin Zárate Hugo   +15 more
wiley   +1 more source

From scales to armor: Scale losses and trunk bony plate gains in ray‐finned fishes

Evolution Letters, Volume 5, Issue 3, Page 240-250, June 2021., 2021
Abstract Actinopterygians (ray‐finned fishes) are the most diversified group of vertebrates and are characterized by a variety of protective structures covering their integument, the evolution of which has intrigued biologists for decades. Paleontological records showed that the first mineralized vertebrate skeleton was composed of dermal bony plates ...
Alexandre Lemopoulos, Juan I. Montoya‐Burgos   +1 more
wiley   +1 more source