Results 121 to 130 of about 814,992 (234)

Using convolutional neural networks to count parrot nest‐entrances on photographs from the largest known colony of Psittaciformes

open access: yesEcology and Evolution
Counting animal populations is fundamental to understand ecological processes. Counts make it possible to estimate the size of an animal population at specific points in time, which is essential information for understanding demographic change.
Gabriel L. Zanellato   +3 more
doaj   +1 more source

La transición energética y su impacto en el desarrollo tecno-productivo: el caso de la industria nuclear en Argentina (2006-2024)

open access: yesAmérica Latina en la Historia Económica
La preocupación por impulsar un proceso de transición energética abre nuevas posibilidades de innovación y creación de mercados, lo que demanda la elaboración de políticas públicas orientadas al desarrollo de soluciones tecnológicas.
Manuel José Lugones
doaj   +1 more source

Firewood as a pathway for insectintroductions. What are the risks of ant invasions in Patagonia?

open access: yesEcología Austral, 2017
Firewood can act as a long-distance dispersal vector for wood-infesting insects both within and among countries. Recently, we detected the alien carpenter ant Camponotus mus in firewood transported from central Argentina to Patagonia.
Victoria Werenkraut   +4 more
doaj   +1 more source

Mottramita-descloizita en un yacimiento de caolín de la zona SE de Los Menucos (prov. de Río Negro) [PDF]

open access: yes, 2002
A mineral of the mottramite-descloizite series from the Blanquita deposit (Los Menucos, Province of Río Negro), was studied by means of X-ray diffiraction, petrographic microscope and SEM-EDX analysis.
Maiza, Pedro   +2 more
core  

Helminth parasites of alien freshwater fishes in Patagonia (Argentina) [PDF]

open access: yes, 2018
A survey of the helminth parasites of alien freshwater fishes from Argentinean Patagonia is presented, based on samples taken from 2010 to 2017 and including previous published records.
Flores, Verónica Roxana   +5 more
core   +1 more source

Migration, circular mobility and food security in Nicaragua: An analytical framework based on food sourcing and farm household multi‐localisation

open access: yesThe Geographical Journal, Volume 192, Issue 1, March 2026.
Short Abstract The article proposes a methodological approach to analyse the links between mobility, migration, immobility and food security, and its application to a case study in Nicaragua. Abstract This article explores the links between agriculture, circular mobility, migration and food security in the Global South. It focuses on farm households in
Sandrine Fréguin‐Gresh   +1 more
wiley   +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

Multiple dinosaur egg-shell occurrence in an Upper Cretaceous nesting site from Patagonia [PDF]

open access: yes, 2010
The discovery of hundreds of megaloolithid-type egg-clutches (some including embryos of an indeterminate species of titanosaur sauropods) in several stratigraphical levels of the Late Cretaceous nesting site of Auca Mahuevo (Chiappe et al., 2005 ...
Chiappe, Luis M.   +2 more
core   +1 more source

Prueba de campo experimental de la vacuna EG95 contra la equinococosis quística ovina en Río Negro, Argentina: segundo estudio de impacto

open access: yesCiencia Veterinaria, 2018
La Equinococosis quística es endémica en la provincia de Río Negro, Argentina. Después de 30 años de control usando praziquantel en perros, la velocidad de transmisión a seres humanos y ovejas, se ha reducido significativamente, sin embargo persiste la ...
Edmundo Juan Larrieu   +18 more
doaj  

Morphological, cytochemical and ultrastructural aspects of blood cells in freshwater stingray species in the middle Rio Negro basin of Amazonian Brazil. [PDF]

open access: yesSci Rep, 2021
de Oliveira AT   +7 more
europepmc   +1 more source

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