Browsing Artículos científicos by Title
Now showing items 347-366 of 555
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Landscape analysis for the American crocodile Crocodylus acutus (Reptilia: Crocodilidae) in northwestern Costa Rica
(Instituto de Biología de la UNAM (México), 2022-10-18)Northwest Costa Rica has the largest crocodile population in the country, but it is also an important area of the human population growth, tourism, crops, and aquaculture, that have generated great changes in the region. ... -
Larvae of the Costa Rican Hetaerina (Odonata: Calopterygidae) with comments on distribution
(Royal Entomological Society, 1993)The larvae of seven of the nine Costa Rican species of Hetaerina (H.capitalis, H.cruentata, H. fuscogutfata, H. majuscula, H. miniata, H. occisa and H. titia) were identified by matching their Cellulose Acetate Gel ... -
Late onset autosomal dominant Charcot– Marie–Tooth 2 neuropathy in a Costa Rican family
(W.S. Maney & Son Ltd., 2009)Objective: To describe the clinical, electrophysiologic and morphologic features of a Costa Rican family with an autosomal dominant inherited Charcot–Marie–Tooth (CMT) neuropathy. Methods: The field study took place in ... -
Latitudinal regionalization of epibenthic macroinvertebrate communities on rocky reefs in the Gulf of California
(Marine Biology Research vol.12 no.4 389-401 2016, 2016-04-27)We report on a latitudinal pattern in the structure and species composition of epibenthic macroinvertebrate communities on rocky reefs along a gradient of eight degrees of latitude in the Gulf of California. We provide ... -
Leaf life span spectrum of tropical woody seedlings: effects of light and ontogeny and consequences for survival
(Oxford University Press, Annals of Botany Company, 2013-03-26)Background and AimsLeaf life span is widely recognized as a key life history trait associated with herbivory resistance, but rigorous comparative data are rare for seedlings. The goal of this study was to examine how light ... -
Liberación de juveniles de pargo manchado Lutjanus guttatus (Steindachner, 1869), como estrategia para la conservación de la especie y educación ambiental marino costera
(Universidad Nacional de Colombia, 2019)La percepción ambiental como herramienta de educación y sensibilización a la conservación de los recursos marinos, fue implementada en la liberación de 102.000 juveniles de Lutjanus guttatus con la participación activa ... -
Lichen community structure and richness in three mid-elevation secondary forests in Costa Rica
(Universidad de Costa Rica (Costa Rica), 2021-06-21)Introduction: Lichen diversity, community structure, composition and species abundance have been used as indicators of the integrity and ecological continuity of tropical forest ecosystems. Objectives: To assess ... -
Lineamientos generales sobre educación científica
(Universidad Michoacana de San Nicolás de Hidalgo, 2014)Ante los retos que representa la tendencia mundial a la globalización y el mundo de constantes transformaciones, donde la ciencia y la tecnología se entrelazan para ofrecer opciones de solución a problemáticas comunes, se ... -
Lista agregada de peces en tres zonas de manglar del golfo de Nicoya, Costa Rica
(Universidad Nacional (Costa Rica), 1995-02-22)El conocimiento en nuestro país sobre la ictiofauna asociada a zonas de manglar es escaso, especialmente en zonas alejadas de la parte central del Golfo. La suma de características físicas y biológicas que se dan en estas ... -
Lista Provisional de los peces de las aguas continentales de Costa Rica
(Universidad Nacional (Costa Rica), 1984-01-01)A revised and amplified list of species of Costa Rican continental water fishes is presented. Some species are included for the first time in the Costa Rican freshwater ichthyofauna and others are not described yet to the ... -
Longitud a la primera madurez, ciclo reproductivo y crecimiento del camarón blanco (Penaeus occidentalis, decapoda:penaeidae) en la parte interna del Golfo de Nicoya, Costa Rica
(Universidad Nacional (Costa Rica), 2000)En este trabajo se estudiaron algunos aspectos biológicos de la población de Penaeus occidentalis de la parte interna del Golfo de Nicoya. La relación de sexos en la población, hembra : macho = 1,4 : 1, resultó ser ... -
Losing legs and walking hard: Effects of autotomy and different substrates in the locomotion of harvestmen in the genus Prionostemma
(Journal of Arachnology vol.44 no.1 76-82 2016, 2016-04-01)Autotomy, the strategy of voluntarily releasing a leg during an encounter with a potential predator or in agonistic interactions between conspecifics, is common in animals. The potential costs of this behavior have been ... -
Madurez sexual, Índice de condición y rendimiento de Pinctada mazatlanica (Pterioida: Pteriidae), Golfo de Nicoya, Costa Rica
(Universidad de Costa Rica, 1997)The reproductive cycle, condition index and meat yield of 627 specimens of pearl oyster, Pinctada mazat/anica were studied in Isla Pan de Azúcar, Golfo de Nicoya, Costa Rica from September 1993 through September ... -
Manglares y sus Servicios Ecosistémicos: hacia un Desarrollo Sostenible
(Universidad Nacional (Colombia), 2019)Los manglares se extienden a través de las zonas tropicales y sub tropicales del planeta, se han adaptado a sobrevivir a condiciones ambientales adversas por lo tanto, han desarrollado características de supervivencia ... -
Marea roja producida por Lingulodinium polyedrum (Peridiniales, Dinophyceae) en Bahía Culebra, Golfo de Papagayo, Costa Rica
(Universidad de Costa Rica, 2001)This is the first record of the dinoflagellate Lingulodinium polyedrum in a red tide bloom in the North Pacific coast of Costa Rica. The sample was collected on April 2000 at Culebra Bay, Gulf of Papagayo, ... -
Marine aquaculture in the pacific coast of Costa Rica: Identifying the optimum areas for a sustainable development
(Elsevier (Países Bajos), 2022-03-15)Sustainable marine aquaculture requires the definition of adequate areas for its development, where the productive activity has a lower impact on the environment and avoid conflicts with other coastal activities. The ... -
Mass mortality of Canthigaster rostrata(Tetraodontiformes: Tetraodontidae) on the southern Costa Rican Caribbean coast
(Universidad Nacional (Costa Rica), 2018-01)In 2017 a mass mortality event of the reef fish Canthigaster rostrata was observed on the Southern Caribbean coast of Costa Rica. The 86 subjects collected, possibly juveniles, were less than 49 mm and below 2.8 g. Similar ... -
Medicinal plants cultivated in urban home gardens in Heredia, Costa Rica
(BioMed Central (Reino Unido), 2022)Background: Urban ethnobotanical research in Costa Rica is rather rare and home gardens are poorly studied so far. Investigating their biodiversity is crucial in gathering knowledge on the uses of this particular flora, ... -
Mesoamerican tree squirrels evolution (Rodentia: Sciuridae): a molecular phylogenetic analysis
(Universidad de Costa Rica, 2014)The tribe Sciurini comprehends the genera Sciurus, Syntheosiurus, Microsciurus, Tamiasciurus and Rheinthrosciurus. The phylogenetic relationships within Sciurus have been only partially done, and the relation ship between ... -
Microalgas en estanques de tilapia y su potencial biotecnológico, ambiental e industrial
(Universidad Estatal a Distancia (Costa Rica), 2013)Las microalgas han sido ampliamente estudiadas a nivel mundial, sin embargo en el trópico hacen falta más estudios relacionados con su identificación y posibles usos biotecnológicos. Los estanques de tilapias son ecosistemas ...