Results 21 to 30 of about 246 (148)

Length-weight relationship for Potamotrygon wallacei (Carvalho, Rosa and Araújo, 2016) caught in the middle Negro River, Barcelos, Brazilian Amazon

Brazilian Journal of Biology, 2022
This research aimed to estimate the length-weight ratio (LWR) of the stingray Potamotrygon wallacei, known locally as the cururu, which was caught in streams and lakes in the middle Negro River region, Amazonas, Brazil. The stingrays were captured during
M. G. Amazonas, D. Olentino, C. Lubich, W. P. Duncan, K. C. Yamamoto   +4 more
doaj   +1 more source

Potamotrygonidae Garman 1877

, 2023
Family Potamotrygonidae Garman 1877 (Fig. 2D). River Stingrays, Whiptail Stingrays; Rayas de Espina, Rayas Látigo Description: Body strongly depressed; anterior edge of the greatly enlarged pectoral fins attached to the sides of the head via the antorbital cartilage; up to about 100 cm in length; disc a rounded rhomboid, wider than long, evenly rounded
Angulo, Arturo, Betts, Joel T., González-Alemán, Néstor J., Castañeda, Edgar, Berghe, Eric Van Den, Elías, Diego J., Mcmahan, Caleb D., Matamoros, Wilfredo A.   +7 more
openaire   +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

Evolution of reproductive modes in sharks and rays

Journal of Evolutionary Biology, Volume 36, Issue 11, Page 1630-1640, November 2023., 2023
The evolution of reproductive modes in sharks, rays, and chimaeras. Abstract The ecological and life history drivers of the diversification of reproductive modes in early vertebrates are not fully understood. Sharks, rays and chimaeras (group Chondrichthyes) have an unusually diverse variety of reproductive modes and are thus an ideal group to test the
Gergely Katona, Flóra Szabó, Zsolt Végvári, Tamás Székely Jr, András Liker, Robert P. Freckleton, Balázs Vági, Tamás Székely   +7 more
wiley   +1 more source

Ectoparásitos (Argulidae, Cymothoidae, Corallanidae) en rayas de agua dulce (Potamotrygonidae) de la Orinoquia colombiana

Biota Colombiana, 2018
Se registra por primera vez para Colombia (cuenca del Orinoco), cuatro especies de crustáceos ectoparásitos en rayas de agua dulce (Potamotrygonidae), género Potamotrygon.
Carlos Andrés Lasso, Martha R. Campos, Mónica A. Morales-Betancourt, David Castro   +3 more
doaj   +5 more sources

Comparing the performance of 12S mitochondrial primers for fish environmental DNA across ecosystems

Environmental DNA, Volume 3, Issue 6, Page 1113-1127, November 2021., 2021
We propose a framework for comparing the performance of primer pairs, which we applied to the comparison of two fish eDNA primer pairs, teleo and MiFish‐U. We showed how those primer pairs could be best used together to increase diversity coverage of eDNA studies.
Andrea Polanco F., Eilísh Richards, Benjamin Flück, Alice Valentini, Florian Altermatt, Sébastien Brosse, Jean‐Claude Walser, David Eme, Virginie Marques, Stéphanie Manel, Camille Albouy, Tony Dejean, Loïc Pellissier   +12 more
wiley   +1 more source

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

Hematological parameters of freshwater stingrays from the lower river negro, Amazonas, Brazil [PDF]

Brazilian Journal of Biology
Freshwater stingrays of the subfamily Potamotrygoninae represent a unique group of elasmobranchs exclusively adapted to freshwater environments in South America.
R. M. Paixão, A. R. S. Liebl, M. F. S. Gomes, M. W. S. Ribeiro, A. N. A. Santos, J. P. F. Rufino, A. C. N. Alves, A. T. Oliveira   +7 more
doaj   +2 more sources

Potamotrygonidae Garman 1877

, 2020
Published as part of Hui, Tan Heok, Peng, Kelvin Lim Kok, Huan, Liew Jia, Wei, Low Bi, Hing, Rayson Lim Bock, Beng, Jeffrey Kwik Teik & Yeo, Darren C. J., 2020, The non-native freshwater fishes of Singapore: an annotated compilation, pp. 150-195 in Raffles Bulletin of Zoology 68 on page 151, DOI: 10.26107/RBZ-2020-0016, http://zenodo.org/record ...
Hui, Tan Heok, Peng, Kelvin Lim Kok, Huan, Liew Jia, Wei, Low Bi, Hing, Rayson Lim Bock, Beng, Jeffrey Kwik Teik, Yeo, Darren C. J.   +6 more
openaire   +2 more sources

Mitochondrial DNA suggests Hybridization in Freshwater Stingrays Potamotrygon (POTAMOTRYGONIDAE: MYLIOBATIFORMES) from the Xingu river, Amazonia and reveals speciation in Paratrygon aireba

Anais da Academia Brasileira de Ciências, 2021
In the Xingu river basin, Brazil, occurs two genera of Potamotrygonidae family: Potamotrygon and Paratrygon. In this region, the taxa have significant economic importance for the ornamental fishing industry, being intensively captured, especially the ...
DAMIRES SANCHES, THAIS MARTINS, ÍTALO LUTZ, IVANA VENEZA, RAIMUNDO DA SILVA, FELIPE ARAÚJO, JANICE MURIEL-CUNHA, IRACILDA SAMPAIO, MAGALI GARCIA, LEANDRO SOUSA, GRAZIELLE EVANGELISTA-GOMES   +10 more
doaj   +1 more source