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Mostrando ítems 632-651 de 1615
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Expresión de genes relacionados al sistema de defensa de dos variedades de café (Coffea Arabica) mediante el uso de inductores de resistencia contra el patógeno de la roya (Hemileia vastatrix)
(2022)El objetivo de esta investigación fue analizar la expresión 6 genes relacionados con el sistema de defensa café (Coffea arabica L.) contra el patógeno de la roya (Hemileia vastatrix) al aplicar AS y FP en plantas var. Obatá ... -
Expression analysis of two SOMATIC EMBRYOGENESIS RECEPTOR KINASE (SERK) genes during in vitro morphogenesis in Spanish cedar (Cedrela odorata L.)
(2018-11-08)Somatic embryogenesis (SE) is one of the most important steps during regeneration, but the molecular mechanism of SE remains unclear for Cedrela odorata. SOMATIC EMBRYOGENESIS RECEPTOR-LIKE KINASE (SERK) is one of the genes ... -
Extended suspect screening to identify contaminants of emerging concern in riverine and coastal ecosystems and assessment of environmental risks
(2021)A suspect screening methodology was developed for the fast and reliable identification of 360 contaminants of emerging concern (CECs) of anthropogenic origin in the vulnerable area of the Ebro Delta (Catalonia, Spain) and ... -
External Morphology of Tagosodes orizicolus (Homoptera: Delphacidae) Revealed by Scanning Electron Microscopy
(2001)A comprehensive analysis of the ultrastructure of the delphacid rice pest Tagosodes orizicolus (Muir) was undertaken using scanning electron microscopy to resolve taxonomic problems in the distinction of females and nymphs ... -
Extreme Behavioral Adjustments by an Orb‐Web Spider to Restricted Spaces
(2012)Adaptive flexibility in response to environmental variation is often advantageous and occurs in many types of traits in many species. Although the basic designs of the orb webs of a given species are relatively uniform, ... -
El factor humano en la regeneración de bosques
(2004-06)Se proponen ideas prácticas para la recuperación de bosques, valorando tres estrategias: A) Regeneración natural, sin intervención antropógena más allá de la protección física (ej., cercas, vallas, rondas contra incendios) ... -
Factores de paisaje y de manejo ligados a la conservación de mamíferos terrestres dentro de la Reserva Forestal Golfo Dulce, Costa Rica
(2022)Las Áreas Protegidas (AP) son esenciales como hábitat para especies en peligro como los mamíferos grandes y medianos, sin embargo, cada vez es más evidente que la conservación en tierras privadas es necesaria para que las ... -
Factors affecting phenological patterns of bombacaceous trees in seasonal forests in Costa Rica and Mexico
(2003)We compared phenological patterns of tree species of the family Bombacaceae in three seasonal forests in Mexico and Costa Rica whose dry seasons vary in duration and intensity. The objectives were to (1) determine intraspecific ... -
Fallen Branches as Part of Leaf-Cutting Ant Trails: Their Role in Resource Discovery and Leaf Transport Rates in Atta cephalotes
(2007)Fallen branches, logs, and exposed roots (fallen branches hereafter) commonly form part of the trunk trail system of leaf-cutting ants that inhabit the tropical rain forest. We studied the role of fallen branches on resource ... -
La familia Bombacaceae (Malvales) en Costa Rica
(1997)General descriptions and taxonomic keys to the nine genera (Bernoullia, Ceiba, Huberodendron, Matisia, Ochroma, Pachira, Pseudobombax, Quararibea, and Spirotheca) and twenty-four species of Bombacaceae species known to ... -
Familia LOASACEAE
(2021-11-05)Este texto describe las características de plantas pertenecientes a varias especies de la familia Loasaceae. Se detallan aspectos de sus tallos, raíces, hojas, flores, inflorescencias, y frutos. También se menciona la ... -
La fase Terrestre de la Tortuga lora 1081Lepidochelys olivacea
(1980)Esta investigación estudia algunos aspectos de la fase terrestre del ciclo de vida de la tortuga lora Lepidochelys olivacea -
Feeding by Philoponella vicina (Araneae, Uloboridae) and how uloborid spiders lost their venom glands
(2006)Feeding by uloborid spiders is unusual in several respects: cheliceral venom glands are absent; prey wrapping is extensive (up to several hundred metres of silk line) and severely compresses the prey; the spider’s mouthparts ... -
Feeding effectiveness of Megaphobema mesomelas (Araneae, Theraphosidae) on two prey types
(2012)Prey selection is essential for individual fitness; therefore, it would be expected that a predator would select prey of a higher rank (energy/time) when exposed to prey of differing quality. In this paper, we compare the ... -
Feeding habits of the Pacific bearded brotula Brotula clarkae Hubbs, 1944 (Ophidiidae) along the Pacific coast of Costa Rica, Central America
(2016)The present study analyzed the diet composition, ontogenetic shifts and dietary overlap of Brotula clarkae in relation to stage of maturity and sex. Samples were collected from the trawling fishery along the Pacific coast ... -
Fenología de Crescentia alata (Bignoniaceae) en Guanacaste, Costa Rica
(2019)Los estudios fenológicos generan información que contribuye con el conocimiento de las relaciones entre especies y componentes abióticos de los ecosistemas, disponibilidad de alimento para animales y regeneración de cobertura ... -
Fenología de especies de árboles de la Península de Osa y la región de Golfo Dulce, Costa Rica
(2007)Se presentan datos sobre fenología de hojas, flores y frutos de 74 especies de árboles de la Península de Osa y Golfo Dulce, al Sureste de Costa Rica. Los datos fueron obtenidos de observaciones directas de árboles no ... -
Fenología reproductiva y dispersión de semillas de Potalia turbinata (Gentianaceae) por vertebrados en un bosque húmedo tropical en Costa Rica
(2021)Potalia turbinata (Gentianaceae) es un arbusto que se distribuye en la zona norte y caribe de Costa Rica. En general se sabe poco de esta especie, por ejemplo, se desconoce la fenología reproductiva y sus interacciones de ...