Results 61 to 70 of about 97,331 (271)

La Colonización del Chaco austral argentino y el tránsito hacia el ciclo algodonero. Afluencia humana y problemas de coexistencia en una sociedad en formación

open access: yesAnuario de Estudios Americanos, 2008
Durante las décadas veinte y treinta del siglo pasado, se produjo en el entonces Territorio del Chaco un vertiginoso proceso que modificó radicalmente la fisonomía económica y social de este espacio argentino.
Oscar Ernesto Mari
doaj   +1 more source

The genus Erlandia Aurivillius, 1904 (Coleoptera: Cerambycidae) in Argentina, with the description of a new species [PDF]

open access: yes, 2011
The genus Erlandia (Cerambycinae: Erlandiini) was described by Aurivillius in 1904, containing a single species, Erlandia inopinata, distributed in Bolivia, Argentina, and Paraguay. Anew species, E.
Di Iorio, Osvaldo R.
core  

First record of Eptesicus brasiliensis argentinus Thomas, 1920 (Chiroptera, Vespertilionidae) in Entre Ríos province, Argentina [PDF]

open access: yes, 2018
Here, we present the first record of Eptesicus brasiliensis argentinus Thomas, 1920 for the province of Entre Ríos, Argentina. This subspecies was originally described as a full species (Eptesicus argentinus) based on its morphological features that ...
Barquez, Ruben Marcos   +3 more
core   +1 more source

Distribution modelling for Neotropical freshwater stingrays Potamotrygon brachyura and Potamotrygon motoro (Myliobatiformes, Potamotrygonidae) in the Uruguay River basin

open access: yesJournal of Fish Biology, EarlyView.
Abstract This study aimed to identify geographical distribution patterns of the giant short‐tailed river stingray Potamotrygon brachyura and the motoro stingray Potamotrygon motoro in the Uruguay River basin. Data on presence/absence of stingrays were based on fishers' knowledge accessed by interviews through expeditions in Brazil, Argentina and ...
Danilo Araujo Soares Pereira   +2 more
wiley   +1 more source

Infecção por riquétsias em carrapatos de aves silvestres em duas ecorregiões da Argentina [PDF]

open access: yes, 2016
Several tick-borne Rickettsia species are recognized human pathogens in Argentina. Here we evaluated rickettsial infection in ticks collected on passerine birds during 2011-2012 in two eco-regions of Argentina.
Borges Costa, Francisco   +4 more
core   +1 more source

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

open access: yesJournal of Fish Biology, EarlyView.
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
Lucas E. P. Kampfert   +5 more
wiley   +1 more source

The Role of Gene Flow in the Diversification of the Monkey Treefrog Complex Across the South American Dry Diagonal

open access: yesZoologica Scripta, EarlyView.
ABSTRACT Understanding Neotropical megadiversity remains challenging due to fundamental taxonomic issues, including identifying and describing cryptic species and their distribution, and the limited knowledge of key factors driving biological diversification. Such challenges are especially prominent in diverse clades with high levels of cryptic species,
Felipe Camurugi   +10 more
wiley   +1 more source

La producción agropecuaria en el nordeste subtropical argentino. Condicionantes y dinámica geográfica en la segunda mitad del siglo XX

open access: yesEstudios Geográficos, 2001
[es] La región del Noreste Subtropical de la República Argentina, integrada por las provincias de Chaco, Corrientes, Misiones y Formosa constituye un ámbito geográfico de características especiales en el contexto agropecuario del país.
Cristina Ofelia Valenzuela de Mari
doaj   +1 more source

Along the Silenced Footsteps of Latin American Pastoralists: From Mexico to Argentina, a Journey Through Pastoral Systems in Latin America

open access: yesThe Journal of Latin American and Caribbean Anthropology, Volume 31, Issue 1, March 2026.
ABSTRACT Pastoralism worldwide faces a complex landscape of increased pressures and exclusion. Beyond ecological and economic challenges, pastoralists suffer eroding cultural identity, limited generational renewal, and political marginalization. Yet pastoral livelihoods are increasingly recognized as stewards of sustainable futures and amongst the best
Greta Semplici, Pablo Manzano
wiley   +1 more source

ARSENIC DEGRADATION BY Pseudomonas aeruginosa FOR WATER BIOREMEDIATION. PRELIMINARY STUDY

open access: yesAvances en Ciencias e Ingeniería, 2015
The aim of this study was to investigate the arsenic resistance in pure cultivations of Pseudomonas aeruginosa isolated from Presidencia Roque Sáenz Peña groundwater (Chaco province), and evaluate the possibility of its use to remove arsenic from ...
Esther E. Pellizzari   +3 more
doaj  

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