Results 51 to 60 of about 16,784 (214)

RENDIMIENTO DE GRANO DE GENOTIPOS DE MAÍZ SEMBRADOS BAJO TRES DENSIDADES DE POBLACIÓN

Ecosistemas y Recursos Agropecuarios, 2014
Con el objetivo de determinar el efecto de la densidad de población sobre el rendimiento de grano de nueve genotipos de maíz (Zea mays L.) tropical, se condujo en 2005 un estudio en el campo experimental de la Univer-sidad Juárez Autónoma de Tabasco en ...
E de la Cruz-Lázaro, H Córdova-Orellana, MA Estrada-Botello, JD Mendoza-Palacios, A Gómez-Vázquez, NP Brito-Manzano   +5 more
doaj   +1 more source

Ecología de poblaciones

Desde la experiencia y actualización permanente docente de los autores, el libro aborda los ejes temáticos fundamentales para la ecología de poblaciones teórica y aplicada: leyes y conceptos centrales; muestreo, distribución y abundancia; dinámica del cambio en longitud-biomasa de los individuos y numérico; ajustes al ambiente (evolución del nicho ...
Rumi Macchi Zubiaurre, Alejandra, Rodrigues Capítulo, Alberto   +1 more
openaire   +2 more sources

Identifying hotspots of faunal data deficiency to direct urgent research and monitoring

Conservation Biology, EarlyView.
Abstract Data deficiency is a substantial challenge for extinction risk assessments because incomplete data means we cannot accurately identify priority protected areas for conservation. Here, we use the International Union for Conservation of Nature (IUCN) distributions of amphibians, sharks and rays, fish, mammals, birds, and reptiles to identify ...
Matt W. Hayward, Danielle Verdon‐Kidd, K. Colyvas, Ellen Saxon, Andrea S. Griffin   +4 more
wiley   +1 more source

Environmental influence and species occurrence of yellowjacket drones in an invaded area

Scientific Reports
During the mating season, reproductive individuals of numerous insect species gather in rendezvous areas, which increases mating opportunities. Male hymenopterans often have to move considerable distances during a particular season, searching or waiting ...
Agustina P. Porrino, Maité Masciocchi, Andrés S. Martínez   +2 more
doaj   +1 more source

Extreme site fidelity in long‐distance migratory shorebirds in Australia and potential implications for conservation

Conservation Biology, EarlyView.
Abstract Site fidelity is the tendency for animals to repeatedly return to the same locations, either within or between years. Site fidelity enables animals to utilize knowledge of previously visited locations, including assessments of seasonal variations in health and mortality risks (e.g., predation), resource availability, and social benefits such ...
Tobias A. Ross, Australasian Wader Studies Group, Victorian Wader Study Group, Queensland Wader Study Group, Robyn Atkinson, Maureen Christie, Danny I. Rogers, Chris Hassell, Roz Jessop, Jonathan T. Coleman, Theunis Piersma, Sara Ryding, Aaron Spence, Marcel Klaassen   +13 more
wiley   +1 more source

Evaluación de generaciones segregantes de fríjol Phaseolus vulgaris L. en campos de agricultores en contraste a la realizada en estación experimental

Acta Agronómica, 1995
<p>This study was conducted at CIAT, in both the research station and fanners' plots, in the Darién area, of the Cauca Valley Department, between 1989 and 1991.
Beltrán Jorge Alonso, Kornegay Julia, Baena García Diosdado   +2 more
doaj  

Intact coastal nursery rearing amid climate‐driven phenological shifts in threatened salmon

Conservation Biology, EarlyView.
Abstract Literature linking phenology to climate has proliferated in recent decades and shows that climate change has reorganized seasonal opportunities worldwide. However, this literature often quantifies changes in point measures of timing (e.g., beginnings and peaks) without context about duration (e.g., rearing season length) or performance (e.g ...
Stuart H. Munsch, Joseph H. Anderson, Eric M. Beamer, Joshua W. Chamberlin, Christopher Ellings, Correigh M. Greene, Sayre Hodgson, Michael T. LeMoine, W. Todd Zackey   +8 more
wiley   +1 more source

Análisis del conocimiento actual de la ecología, evolución y manejo del género Bursera (Burseraceae) en México

Acta Botanica Mexicana
Antecedentes y Objetivos: El género Bursera es altamente diverso y alcanza su mayor riqueza en México. Dada su relevancia, usos actuales y potenciales y el reciente aumento en las publicaciones en torno a él, es necesario analizar los avances en su ...
Consuelo Bonfil Sanders, Bruno Barrales-Alcalá   +1 more
doaj   +1 more source

Subspecies taxonomy reflects social and geographic patterns of taxonomic effort in tetrapods

Conservation Biology, EarlyView.
Abstract Subspecies have been used in conservation biology to account for intraspecific patterns in genetic diversity, which is crucial to long‐term population viability. Although over 3200 subspecies are currently assessed by the International Union for Conservation of Nature Red List, their biological relevance remains controversial.
Jhonny J. M. Guedes, José Alexandre F. Diniz‐Filho, André V. L. Freitas, Mario R. Moura   +3 more
wiley   +1 more source

Respuesta del maíz a las aplicaciones de nitrógeno en diferentes densidades de poblaciones y sistemas de siembra Maize response to nitrogen application at several plant densities and planting systems

Agronomía Colombiana, 1988
El nitrógeno es un macronutrimento de mayor importancia para las plantas, debido a que ellas lo requieren en grandes<br />cantidades. Por lo general, la disponibilidad de este elemento químico en el suelo es insuficiente, requiriéndose su ...
Martínez W. Orlando, Torregrozo C. Manuel, Arce Jaime, Abril V. Luis   +3 more
doaj