Results 41 to 50 of about 7,182 (179)

La civilización actual en una encrucijada: nuevos retos para un gobierno global

Internaciones, 2017
Al comenzar este siglo, los recursos se utilizan a una tasa superior a la que se pueden reponer, y la humanidad demanda cambios y decisiones de gran complejidad para las relaciones internacionales.
Erico Wulf Betancourt
doaj   +1 more source

Sobrevivencia in vitro de segmentos nodales de Cordia trichotoma

Agronomía Costarricense, 2023
Introducción. El presente trabajo se llevó a cabo para evaluar segmentos de Cordia trichotoma en el Laboratorio de Biotecnología de la Facultad de Ciencias Agrarias de la Universidad Nacional de Asunción, Paraguay. Objetivo.
Maura Isabel Díaz-Lezcano, Angel Manuel Duarte-Asilvera, Luis Gonzalez-Segnana, Mirtha Lucía Vera de Ortiz   +3 more
doaj   +1 more source

When conservation meets contagion: Mapping yellow fever risk to guide vaccination in an endangered primate

Journal of Applied Ecology, Volume 63, Issue 6, June 2026.
Spatial projections revealed high‐risk areas for YF transmission, highlighting priority zones for targeted vaccination efforts in GLTs. By integrating disease ecology into conservation planning, this study offers a scalable framework for spatially informed interventions aimed at mitigating disease‐driven declines in threatened species.
Maxime Pierron, Aurore Ponchon, Carlos R. Ruiz‐Miranda, Andreia Martins, Cédric Sueur, Valéria Romano   +5 more
wiley   +1 more source

Mujeres rurales y sobrevivencia familiar

Realidad, Revista de Ciencias Sociales y Humanidades, 1993
No abstract availableRealidad: Revista de Ciencias Sociales y Humanidades No.
openaire   +3 more sources

Fluctuating asymmetry in spider‐hunting wasps as a possible indicator of stress in Brazilian Atlantic Forest landscapes Assimetria flutuante em vespas caçadoras de aranhas como possível indicador de estresse em paisagens da Mata Atlântica brasileira

Ecological Entomology, Volume 51, Issue 3, Page 558-569, June 2026.
Agricultural cover was positively associated with fluctuating asymmetry in Trypoxylon opacum, suggesting a possible increase in developmental instability in intensively managed landscapes. Wing size was positively related to forest cover and negatively related to agricultural cover, indicating that forested landscapes may promote larger body size ...
Luana Vieira Carlin dos Santos, Jean Pablo Alves de Deus, Milton Cezar Ribeiro, Maria Luisa Tunes Buschini   +3 more
wiley   +1 more source

Escacez y sobrevivencia en Centroamérica

Revista de Ciencias Ambientales, 2019
No disponible/Not ...
openaire   +3 more sources

Canalized to heat, plastic to cold: adaptive coordination of leaf and seed strategies in populations spanning an elevational gradient

New Phytologist, Volume 250, Issue 2, Page 873-884, April 2026.
Summary In tropical mountains, surviving temperature extremes demands finely tuned strategies. We investigated how populations of the bromeliad Pitcairnia flammea across a 2200 m elevational gradient balance genetic canalization and plasticity, and whether thermal strategies are coordinated between seeds and leaves.
Cleber J. N. Chaves, Danilo U. Tavares, Isabella V. Lemos‐Silva, João P. S. P. Bento, Henrique Vilela‐Bianchini, Paulo Aecyo, Tami C. Cacossi, Marília M. Tavares, Gabriel P. Sabino, Vitor de A. Kamimura, Wagner L. dos Santos, Lucas N. Gonçalves, Karina T. Silva, Juliana L. S. Mayer, Rafael V. Ribeiro, Diego Escobar‐Escobar, Kenneth J. Feeley, Clarisse Palma‐Silva   +17 more
wiley   +1 more source

Fecundity, growth, and survival of the angelfish Pterophyllum scalare (Perciformes: Cichlidae) under laboratory conditions

Revista de Biología Tropical, 2009
The freshwater angelfishes (Pterophyllum) are South American cichlids that have become very popular among aquarists, yet scarce information on their culture and aquarium husbandry exists.
Armando A Ortega-Salas, Isabel Cortés G, Hugo Reyes-Bustamante   +2 more
doaj  

Actividad metabólica y velocidad de asimilación instantánea de CO₂ en tallos de pitaya (Stenocereus thurberi) propagada vegetativamente

Botan‪ical Sciences
Antecedentes: Los periodos de sequía en el Desierto Sonorense aumentan el interés por cultivos con baja huella hídrica. Stenocereus thurberi es una alternativa, incluyendo beneficios económicos para los pobladores.
Jesús Antonio Orozco-Avitia, Ángel Javier Ojeda-Contreras, Alfonso A. Gardea, Miguel A. Hernández-Oñate, Tania Carvallo, Aldo Gutierrez   +5 more
doaj   +1 more source

Avoceta americana (Recurvirostra americana): primeros registros reproductivos en Chihuahua, México

Huitzil, 2015
La avoceta americana (Recurvirostra americana) es un ave playera que se encuentra asociada a los cuerpos de agua poco profundos; de figura estilizada y apariencia inconfundible, pertenece a la familia Recurvirostridae.
Diana Venegas Holguín, Militza Érica Díaz Tengler, Javier Cruz Nieto   +2 more
doaj   +1 more source