Results 1 to 10 of about 314 (167)

Genetic characterization of the Neotropical catfish Pimelodus maculatus (Pimelodidae, Siluriformes) in the Upper Uruguay River [PDF]

Genetics and Molecular Biology, 2012
Freshwater fish present unique challenges when one attempts to understand the factors that determine the structure of their populations. Habitat fragmentation is a leading cause of population decline that threatens ecosystems worldwide. In this study, we
Josiane Ribolli, Cláudio Manoel Rodrigues de Melo, Evoy Zaniboni-Filho   +2 more
doaj   +7 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

DNA metabarcoding assessment of Neotropical ichthyoplankton communities is marker-dependent. [PDF]

Ecol Evol, 2023
DNA metabarcoding has been applied as a rapid, cost‐effective, and accurate taxonomy tool, allowing the identification of multiple individuals simultaneously. The combined use of the three markers increased the genera detection rates by 25%–87.5%, allowing an increased taxonomic coverage and robust taxonomic identification of complex Neotropical ...
Teixeira DF, Hilário HO, Santos GB, Carvalho DC.   +3 more
europepmc   +2 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

Hydrological Connectivity Enhances Fish Biodiversity in Amazonian Mining Ponds: Insights From eDNA and Traditional Sampling. [PDF]

Mol Ecol
ABSTRACT 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, Reyes-Calderón A, Venail P, Britzke R, Santa-Maria MC, Araújo-Flores JM, Silman M, Fernandez LE.   +7 more
europepmc   +2 more sources

Genetic variability in four fish species (Pimelodus maculatus, Prochilodus lineatus, Salminus brasiliensis and Steindachneridion scripta) from Uruguay River basin

Brazilian Archives of Biology and Technology, 2006
The genetic variability of four fish species (Pimelodus maculatus, Prochilodus lineatus, Salminus brasiliensis and Steindachneridion scripta) collected in the upper Uruguay River basin was analyzed using the RAPD technique.
Micheline Sandra Ramella, Mariela Aparecida Kroth, Samira Meurer, Alex Pires de Oliveira Nuñer, Evoy Zaniboni Filho, Ana Carolina Maisonnave Arisi   +5 more
doaj   +3 more sources

Deciphering the complex life cycle and partial migration of an ecological engineer and critical Neotropical fishery species, Prochilodus costatus. [PDF]

J Fish Biol
Abstract Understanding complex migration patterns, including drivers of partial migration and habitat use, is challenging but essential for conservation, as it determines a species' adaptative capacity in the face of environmental change and anthropogenic threats.
Peressin A, de Magalhães Lopes J, Neto FRA, Machado GJ, Alves CBM, Murgas LDS, Pompeu PS.   +6 more
europepmc   +2 more sources

Population structure analysis of Pimelodus maculatus (Pisces, Siluriformes) from the Tietê and Paranapanema Rivers (Brazil)

Genetics and Molecular Biology, 2003
Pimelodus maculatus populations from the Tietê and Paranapanema rivers were sampled and had their genetic structure analyzed by using RAPD markers, with the aim of contributing to future conservation studies.
Fernanda Simões de Almeida, Leda Maria Koelblinger Sodré, Eucleia Primo Betioli Contel   +2 more
doaj   +3 more sources

DNA metabarcoding of mock communities highlights potential biases when assessing Neotropical fish diversity

Environmental DNA, Volume 5, Issue 6, Page 1351-1361, November 2023., 2023
The performance of a taxonomy‐free approach using ASV/MOTUs was not as precise as assigning DNA reads to species using a curated 12S library that includes approximately 100 fish species since more than one ASV/MOTU was observed for the same specimen.
Heron Oliveira Hilário, Izabela Santos Mendes, Naiara Guimarães Sales, Daniel Cardoso Carvalho   +3 more
wiley   +1 more source

Fisheries in a border area of the Moxos Lowlands (Bolivia) after invasion of Arapaima gigas

Aquaculture, Fish and Fisheries, Volume 3, Issue 2, Page 196-210, April 2023., 2023
We characterized fisheries in the area of the port city of Riberalta (upper Madeira River basin) and evaluated the contribution of an invasive species (Arapaima gigas) to the landings. A. gigas represented 57.6% of the overall economic value of fish in the region.
Gabriela Rico Lopez, Claudia Coca Méndez, Joachim Carolsfeld, Oriana Almeida, Paul Andre Van Damme   +4 more
wiley   +1 more source