Results 61 to 70 of about 755 (165)

Patterns of Style, Diversity, and Similarity in Middle Orinoco Rock Art Assemblages

Arts, 2019
The area encompassed by the Orinoco river basin is home to some of the largest and most diverse rock art sites in lowland South America. In this paper, we aim to formally describe the spatial distribution and stylistic attributes of rock engravings and ...
Philip Riris, José Oliver
doaj   +1 more source

Proposal of a non-lethal visual census method to estimate freshwater stingray abundance

Universitas Scientiarum, 2016
There is not a current method to estimate South American freshwater stingray’s abundance. Therefore we designed a census method and tested it in the field.
Mónica Andrea Morales-Betancourt, Carlos Andrés Lasso-Alcalá   +1 more
doaj   +1 more source

Lista preliminar de los peces del río Papunahua, cuenca del río Inírida - departamento del Vaupés, Colombia

Biota Colombiana, 2009
Fish sampling in the Papunahua river (Inírida river basin-colombian Orinoco) (october and november 2005) revealed 86 fish species grouped in 64 genera, 28 families, and 8 orders. Orders with the largest numbers of species were Characiformes (42 species),
Hollman Miller-Hurtado, Donald C. Taphorn B., José Saulo Usma Oviedo   +2 more
doaj   +1 more source

Methane fluxes from tropical wetlands of the Orinoco River Basin and their regional implications

Abstract. The Llanos del Orinoco, a vast tropical savanna floodplain in northern South America, plays a significant yet understudied role in the global methane (CH4) budget. This study synthesizes existing data to evaluate CH4 emissions from the region, highlighting the interplay between natural processes and anthropogenic influences.
Amaral, J., Botia, S., Quintero, P., Gutierrez Rincon, A., Ho, D., Sanchez, A., Avila-Diaz, A., Uhde, A., Quesada, B., Benavides, J., Winton, R., Sierra, C., Sierra, C., Navarro-Ramírez, M., Pardo Buitrago, D., Hantson, S.   +15 more
openaire   +2 more sources

Soil ecosystem services and land use in the rapidly changing Orinoco River Basin of Colombia

Agriculture, Ecosystems & Environment, 2014
Abstract In the Orinoco River Basin of eastern Colombia large scale and rapid conversion of natural savannas into commercial agriculture exists as a critical threat for the ecological integrity of this fragile region. The highly acidic and compacted soils inherent to this region require thorough physical and chemical conditioning in order for ...
Lavelle, Patrick M., Rodríguez, Nubia E., Arguello, Orlando, Bernal Riobo, Jaime Humberto, Botero, César, Chaparro, Paula, Gómez, Yolanda, Gutiérrez, Albert, Hurtado, María del Pilar, Loaiza, Sandra, Pullido, Sandra Xiomara, Rodríguez, Edgar, Sanabria, Catalina, Velásquez, Elena, Fonte, Steven J.   +14 more
openaire   +2 more sources

Revision of the Astyanax orthodus species-group (Teleostei: Characidae) with descriptions of three new species

European Journal of Taxonomy, 2018
The Astyanax orthodus species-group includes nine species: Astyanax boliviensis sp. nov., A. bopiensis nom. nov., A. embera sp. nov., A. gandhiae sp. nov., A. moorii comb. nov., A. orthodus, A. superbus, A. villwocki and A. yariguies comb. nov. The group
Raquel I. Riuz-C, César Román-Valencia, Donald C. Taphorn, Paulo A. Buckup, Hernán Ortega   +4 more
doaj   +1 more source

A new catfish of the genus Epapterus (Siluriformes: Auchenipteridae) from the Orinoco River basin

, 1984
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Vari, Richard P., Taphorn, Donald C. (Donald Charles),, Jewett, Susan L, Gilbert, Carter Rowell,   +3 more
openaire   +1 more source

Systematics and biogeography of Sternarchellini (Gymnotiformes: Apteronotidae): Diversification of electric fishes in large Amazonian rivers

Neotropical Ichthyology
The Sternarchellini (Gymnotiformes, Apteronotidae) is a clade of 10 electric fish species that inhabit deep river channels of the Amazon and Orinoco basins, attain moderate adult body sizes (15-50 cm TL), and have a predatory life style.
Stephen J. Ivanyisky III, James S. Albert   +1 more
doaj   +1 more source

Revision of the South American freshwater fish genus Laemolyta Cope, 1872 (Ostariophysi: Characiformes: Anostomidae)

Neotropical Ichthyology
The anostomid genus Laemolyta Cope, 1872, is redefined.Various morphological, especially osteological characters in addition to the commonly utilized features of dentition proved useful for its characterization.
Kelly Cristina Mautari, Naércio Aquino Menezes   +1 more
doaj   +1 more source

Spatial and temporal length distribution of Zungaro zungaro caught in the Orinoco River Basin of Colombia [PDF]

Revista Mvz Cordoba, 2015
Objetive. To determine the effect of fishing on capture size of both male and female Zungaro zungaro catfish, historical records of size and spatial distribution of the species were analyzed from the Orinoco Basin in Colombian.
Hernando Ramírez-Gil
doaj