Browsing Artículos científicos by Title
Now showing items 45-64 of 507
-
Aspects of the reproductive biology of the data-deficient Mustelus minicanis and M. norrisi (Chondrichthyes: Triakidae) in the southern Caribbean Sea
(Environmental Biology of Fishes, 2017-05)Reproduction and maturation in the economically important, but data-deficient, Mustelus minicanis and M. norrisi were analysed using catches of populations exploited by a gillnet fishery during two years in the southern ... -
Assessment of methods for predicting eukaryotic promoter sequences
(IEEE, 2023)Identifying promoters is challenging due to their short sequences, low conservation, and complex regulation. Historically, this was done through slow and expensive experimental methods. Efficient pattern recognition and ... -
Atractivos turísticos naturales en el sector Gandoca, Refugio Nacional Mixto de Vida Silvestre Gandoca-Manzanillo, Costa Rica
(Instituto Tecnológico de Costa Rica, 2016-07)En la planificación del espacio físico, la determinación de los atractivos ecoturísticos en áreas silvestres protegidas de carácter mixto es fundamental para orientar los usos permitidos y la gestión comunal. ... -
Avances biotecnológicos sobre maricultura en Costa Rica. Una revisión de la investigación desarrollada por la Escuela de Ciencias Biológicas de la Universidad Nacional
(Universidad Nacional (Costa Rica), 2017-07-31)El desarrollo de la maricultura en Costa Rica ha requerido de la validación, la innovación y la generación de conocimiento científico biotecnológico. Se presenta una revisión de los principales ... -
Avifaunal characterization of Corral de Piedra Palustrine Wetland, Nicoya, Costa Rica
(Universidad Estatal a Distancia, 2017-12)Wetlands maintain high biodiversity and provide impor-tant habitat for many bird species, but now have strong pressure from anthropogenic activities. Birds in wetlands are important indicators of environmental changes ... -
Áreas protegidas de Costa Rica: Fragmentación, tamaño y forma
(Instituto Centroamericano para la investigación en biología y conservación, 2011-10)La reducción en el tamaño del hábitat y la fragmentación ha sido considerada como una de las principales causas de extinción de las especies. Como una estrategia para disminuir el efecto de los procesos de fragmentación ... -
Áreas verdes urbanas, una caracterización paisajística y biológica aplicada a una microcuenca de la Gran Área Metropolitana de Costa Rica
(Universidad Nacional (Costa Rica), 2022-07-30)Este artículo presenta una caracterización paisajística y biológica de las áreas verdes urbanas (AVU) de la microcuenca del río Bermúdez, provincia de Heredia, Costa Rica. Esta caracterización se basa en una clasificación ... -
Batch fertility and larval parameters of the jaguar cichlid (Cichlasoma managuense) spawned in the laboratory
(Universidad Nacional (Costa Rica), 1994-05-06)Abstract: Batch fertility and larval parameters of 32 spawns of the jaguar guapote (Cichlasoma managuense) in the laboratory were analyzed. Batch fertility was positively correlated with the female weight with spawns between ... -
Behavioral plasticity mitigates risk across environments and predators during anuran metamorphosis
(Behavioral Ecology, 2013)Most animals metamorphose, changing morphology, physiology, behavior and ecological interactions. Size- and habitat-dependent mortality risk is thought to affect the evolution and plastic expression of metamorphic timing, ... -
Beta diversity and oligarchic dominance in the tropical forests of Southern Costa Rica
(Blackwell Publishing Ltd, 2019-03)Recent studies have reported a consistent pattern of strong dominance of a small subset of tree species in neotropical forests. These species have been called “hyperdominant” at large geographical scales and “oligarchs” ... -
Biodeterioration and biodegradation of Roman monuments: A comparison of the current status of 18th century paintings by the Canalettos
(2014)Worldwide there is an urgent need to monitor the conditions of monuments affected by biodeterioration and biodegradation, but no long term data exist for most of them. Here is an exception in the case of certain Roman ... -
Biological treatments affect the chemical composition of coffee pulp
(Elsevier, 2003-02-16)Biological treatments were applied to fresh coffee pulp (CoP) to improve its nutritive value for monogastric animals by reducing its content of cellulose and antinutritional factors (ANFs) such as total phenols, tannins ... -
Biomass allocation and gas exchange are affected by light conditions in endangered Cedrela salvadorensis (Meliaceae) seedlings
(Universidad de Costa Rica, 2016)The determination of favorable light habitat conditions per species and life stage is transcendental, for both ex situ and in situ conservation strategies of endangered forest tree species, and for their utilization as ... -
Biometría de Bufo marinus (Anura: Bufonidae) del refugio nacional de vida silvestre Golfito, Costa Rica
(Universidad Nacional (Costa Rica), 1995-10-30)El análisis biométrico de Bufo marinus se realizó en el Refugio Nacional de Vida Silvestre Golfito, Golfito, Puntarenas, Costa Rica, entre mayo de 1986 y junio de 1987. El análisis estadístico de los parámetros biométricos ... -
Biometry of Modiolus capax (Bivalvia: Mytilidae) in Playa Ocotal, Guanacaste, Costa Rica
(Universidad de Costa Rica, 1994)155 specirnens of mussels (Modiolus capax) were gathered during March 1993 in a subtidal hed, located in northern Ocotal, Guanacaste, Costa Rica. For each individual in the randon sample, shell length, breadth and height ... -
Body mass explains digestive traits in small vespertilionid bats
(Springer Science and Business Media Deutschland GmbH, 2021-02-11)Bats are unique among mammals in that they have evolved the capacity to fly. This has generated strong selective pressure on the morphology and function of their digestive system. Given that in bats intestinal length and ... -
Bovine spongiform encephalopathy risk management in Latin America: Costa Rica as a representative country for risk management and policy
(Inderscience Enterprises Ltd., 2010)Costa Rica is a representative Latin American country with significant regional cattle production for its size. The country experienced an exceedingly low challenge for bovine spongiform encephalopathy (BSE) as evidenced ... -
Calidad fisicoquímica y microbiológica del agua superficial del río Grande de Tárcoles, Costa Rica: un enfoque ecológico
(Universidad Estatal a Distancia (Costa Rica), 2021-06)Introducción: La calidad del agua en una cuenca hidrográfica, y su uso potencial, se ven afectados por factores antrópicos y naturales. El río Tárcoles es el receptor final de aguas de la región central de Costa Rica, donde ... -
Camelobaetidius guaycara, a new species of Baetidae (Ephemeroptera) from Costa Rica, Central America
(Magnolia Press, 2018-06-14)The nymphs of a new species of Camelobaetidius (Ephemeroptera: Baetidae) possibly related to the South American species of this genus were found on the Atlantic and Pacific slopes of Costa Rica. Among other characteristics ... -
Caracterización de la cobertura vegetal dentro de la franja de protección del Río Copey, Jacó, Puntarenas, Costa Rica
(Universidad Nacional (Costa Rica), 2017)Los ríos son de los ecosistemas más afectados por las actividades del ser humano; por ello, es necesario evaluar las condiciones de los mismos y su entorno; por esto el objetivo de este estudio es caracterizar la cobertura ...