Results 51 to 60 of about 18,875 (205)

Wetland location and captive breeding influence trans‐Mediterranean movements in the endangered Marbled Duck (Marmaronetta angustirostris)

open access: yesIbis, Volume 168, Issue 1, Page 245-258, January 2026.
Waterbirds distributed in semi‐arid and arid regions seem to have adapted their behaviour to the availability and seasonality of wetlands, increasing their mobility range. The Marbled Duck Marmaronetta angustirostris is a threatened waterbird that shows trans‐Mediterranean movements but these are poorly known.
Irene Pacheco‐Guardiola   +6 more
wiley   +1 more source

Estudi de l'evolució del límit superior del bosc mitjançant la pedoantracologia a la zona de Plaus de Boldís-Montarenyo (Pallars Sobirà) [PDF]

open access: yes, 2008
L'objectiu d'aquesta recerca és l'estudi de l'evolució del límit superior del bosc en la vessant sud dels Pirineus, concretament a l'àrea dels Plaus de Boldís-Montarenyo (Lladorre, Pallars Sobirà). S'han usat diferents fonts i metodologies amb cobertures
Cunill Artigas, Raquel   +3 more
core  

Revisiting Deere in an Extractivist Era: Agrarian Reform and Feminist Legacies in Coastal Ecuador

open access: yesJournal of Agrarian Change, Volume 26, Issue 1, January 2026.
ABSTRACT This article examines how campesinas in coastal Ecuador have navigated shifting labour roles, financial precarity and ecological degradation under Plan Tierras, a state‐led land redistribution policy embedded in an extractivist model of agriculture.
Natalia Landívar, Lynne Phillips
wiley   +1 more source

Ganadería, campesinado y producción de granos básicos: competencias por el uso de la tierra en México

open access: yesRevista Mexicana de Ciencias Políticas y Sociales, 2019
Consideramos a la ganadería vacuna como una forma específica de apropiación del espacio rural productivo, tratando de esclarecer las determinantes externas e internas de su reciente expansión, especialmente en las áreas tropicales, y sus contradicciones ...
Luis Ma. Fernández   +1 more
doaj   +1 more source

Compresion y analisis de imagenes por medio de algoritmos para la ganaderia de precision

open access: yes, 2021
The problem that we want to solve in this project of the subject of Data Structures and Algorithms, is to decipher some images, which have in them animals, being more specific, bovine animals; in which it is necessary to identify if the animal is healthy, that is to say, if it is in good conditions to be taken into account in the process of selection ...
Tapias, David Agudelo   +1 more
openaire   +2 more sources

La ganaderia en los albores del siglo XXI, con especial referencia a la provincia de Jaén [PDF]

open access: yes, 2010
Discurso de Ingreso en la Real Academia de Ciencias Veterinarias de Andalucía Oriental como Académico de ...
Cano Expósito, T.
core  

A new phylogeny of Anastrepha (Diptera: Tephritidae) based on nuclear loci obtained by phylogenomic methods

open access: yesSystematic Entomology, Volume 51, Issue 1, January‐March 2026.
We present an extensive phylogenetic analysis, based on 293 nuclear loci and 728 individuals representing 237 species of Anastrepha, the largest and most economically important New World genus of Tephritidae. The analysis strongly supports the monophyly of most Anastrepha species groups, also revealing previously unknown relationships among species and
Allen L. Norrbom   +19 more
wiley   +1 more source

Spatial Representativeness of MexFlux as a Regional FLUXNET Network

open access: yesJournal of Geophysical Research: Biogeosciences, Volume 130, Issue 12, December 2025.
Abstract Environmental observatory networks are fundamental in advancing scientific understanding of biogeochemical processes. FLUXNET is a global network of regional eddy covariance networks that measure ecosystem‐scale exchanges of greenhouse gases (e.g., CO2, CH4, H2O) and energy between the biosphere and the atmosphere.
Rodrigo Vargas   +21 more
wiley   +1 more source

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