Results 61 to 70 of about 1,453 (199)

Genetic variability of pure Pseudoplatystoma corruscans and Pseudoplatystoma reticulatum individuals in the Paraná and Paraguay River basins [PDF]

Fisheries Science, 2016
The presence of interspecific hybrid surubim (Pseudoplatystoma corruscans × Pseudoplatystoma reticulatum) in natural environments can put at risk the existence of the pure parental lineages. The aim of this study was to characterize the genetic variability of pure Pseudoplatystoma corruscans and Pseudoplatystoma reticulatum individuals from rivers in ...
Vaini, Jussara Oliveira, do Amaral Crispim, Bruno, dos Santos Silva, Danielly Beraldo, Benites, Celso, Russo, Marcia Regina, Grisolia, Alexéia Barufatti   +5 more
openaire   +2 more sources

Quality of semen in the reproductive cycle of Cachara (Pseudoplatystoma fasciatum) raised in captivity

Acta Scientiarum: Biological Sciences, 2019
In this study, we evaluated the semen quality of Cachara (Pseudoplatystoma fasciatum) raised in captivity during its reproductive period. For the evaluation of qualitative parameters, we analyzed: sperm morphology, sperm motility, and sperm vigor; while
Rodrigo Diana Navarro, Juliana Ventorim Lemos, Marcela Tosta Ribeiro   +2 more
doaj   +1 more source

Evolutionary history of Middle American Rhamdia (Siluriformes: Heptapteridae) inferred from comparative mitogenomic data: Insights on historical biogeography and cave colonization in the group

Journal of Systematics and Evolution, Volume 63, Issue 6, Page 1501-1518, November 2025.
Investigating the systematics and biogeography of Neotropical catfishes of the genus Rhamdia refined phylogenetic hypotheses, including deep paraphyly of Rhamdia laticauda, supported northward dispersal catalyzed by emergence of the Panamanian Isthmus and imply that cave colonization is widespread, convergent, and recent, with established cave‐dwelling
Jairo Arroyave, Adán Fernando Mar‐Silva, Bruno F. Melo, Sonia Gabriela Hernández‐Ávila, Jesús M. López‐Vila, Gabriel S. C. Silva, Píndaro Díaz‐Jáimes   +6 more
wiley   +1 more source

Parasites Are Paramount: Vertical Trophic Positions of Parasitic Catfishes in a Tropical River Food Web

Ecology of Freshwater Fish, Volume 34, Issue 4, October 2025.
ABSTRACT The Neotropical catfish family Trichomycteridae contains parasitic fishes that include scale and mucus feeders (subfamily Stegophilinae) and blood feeders (i.e., ‘candirus’, subfamily Vandelliinae). The influence of parasitic catfishes on food web dynamics is unknown.
Carmen G. Montaña, Chase Nimee, Sophie Scott, Megan Beeksma, Kendall Hasting, Takiya Jackson, Leslie Kelso‐Winemiller, Kirk O. Winemiller   +7 more
wiley   +1 more source

Low‐Effort eDNA Sampling Reveals Fish Community Patterns in a Neotropical River Basin

Environmental DNA, Volume 7, Issue 4, July–August 2025.
Low eDNA sampling effort (< 10 sample sites) using a portable on‐site kit with syringe filters and a modest water volume (< 500 mL per site) provided a rapid and robust snapshot of fish biodiversity. Environmental DNA based species richness increases along the upstream‐downstream gradient showing a significant negative correlation with river elevation ...
Daniel Cardoso Carvalho, Heron Oliveira Hilário, Igor Henrique Nascimento, Guilherme Costa Berger, Paulo Santos Pompeu   +4 more
wiley   +1 more source

Efecto de la inclusión en la dieta de hidrolizado proteico de pescado sobre el crecimiento corporal y composición proximal del músculo de doncella (Pseudoplatystoma punctifer)

Revista de Investigaciones Veterinarias del Perú, 2022
Se evaluó el efecto de la inclusión en la dieta de hidrolizado proteico de pescado sobre el crecimiento corporal y la composición química del músculo de juveniles de doncella.  El estudio siguió un diseño experimental completamente al azar con un arreglo
Carlos Cortegano, Rudy Leandro Núñez Montúfar, Deykie Max Wong Bardales, Daniel Prada Rojas, César Augusto Villanueva Chávez, Guadalupe Victoria Contreras Salazar, Sandra Gracia Bezada Quintana, Fernando Demetrio Carcelén Cáceres, Sofía López Guerra   +8 more
semanticscholar   +1 more source

Expansion of fluvial transport of commodities through the Pantanal floodplains of Brazil: Potential impacts and interference by climate change

Conservation Science and Practice, Volume 7, Issue 7, July 2025.
Abstract Inland waterways have historically been viewed as a desirable means for transporting commodities. However, creating and maintaining navigable river channels can entail substantial geomorphological modifications, resulting in changes to the ecohydrology of a river and its adjacent floodplains.
Pierre Girard, Fabio de Oliveira Roque, Wilson Cabral de Sousa Jr, Stephen K. Hamilton   +3 more
wiley   +1 more source

Flood Pulse Effects on the Growth of Pseudoplatystoma fasciatum in the Amazon Basin

Fishes
Fish growth is a fundamental biological process driven by a multitude of intrinsic (within-individual) and extrinsic (environmental) factors that underpin individual fitness and population dynamics.
L. A. Pereira, Leandro Castello, Eric M. Hallerman, E. Rodrigues, C. Doria, F. Duponchelle   +5 more
semanticscholar   +1 more source

Population genetics of the endangered catfish Pseudoplatystoma magdaleniatum (Siluriformes: Pimelodidae) based on species-specific microsatellite loci

, 2021
The Neotropical catfish genus Pseudoplatystoma comprises eight species of large size, widely distributed in South American basins. The endangered species P. magdaleniatum is endemic to Magdalena basin (Colombia), experiences high fishing pressure and its
Kevin León García-Castro, J. D. Rangel-Medrano, R. M. Landínez-García, E. Márquez   +3 more
semanticscholar   +1 more source

Crecimiento y sobrevivencia de post-larvas de bagre rayado (Pseudoplatystoma sp) y yaque (Leiarius marmoratus) consumiendo una dieta seca Crescimento e sobrevivência de pós-larvas do pintado (Pseudoplatystoma sp) e yaque (Leiarius marmoratus) alimentadas com ração seca Adaptation to a commercial diet alters post-larvae growth and development of striped catfish (Pseudoplatystoma sp) and yaque (Leiarius marmoratus)

Revista Colombiana de Ciencias Pecuarias, 2011
El principal desafío de la piscicultura con silúridos consiste en optimizar la producción de alevinos mediante prácticas eficientes de larvicultura y alevinaje.
Lili J Marciales-Caro, Nubia E Cruz-Casallas, John J Díaz-Olarte, Víctor M Medina-Robles, Pablo E Cruz-Casallas   +4 more
doaj