Browsing Artículos científicos by Title
Now showing items 355-374 of 555
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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 ... -
Microhabitat heterogeneity associated with Vanilla spp. and its influences on the microbial community of leaf litter and soil
(Springer Nature, 2020-09)The impact of forest microhabitats on physiochemical properties of the soil and that of microbial communities on tropical soils remain poorly understood. To elucidate the effect of tropical forest stand on leaf litter ... -
Microplastics found in the World Heritage Site Cocos Island National Park, Costa Rica
(Instituto Nacional de Investigación y Desarrollo Pesquero - INIDEP (Argentina), 2022)Microplastics (MPs) defined as ‘small’ pieces of plastic < 5 mm have been found in almost every marine habitat around the world, and studies have shown that we can find them in the ocean surface, the water column, the ... -
El modelo Bandler-Grinder de aprendizaje y la enseñanza de genética mendeliana en estudiantes costarricenses de décimo año
(Universidad Estatal a Distancia (Costa Rica), 2012-12)En Costa Rica existen muy pocas investigaciones en el área de la enseñanza de la genética en secundaria, a pesar de la importancia que tiene esta disciplina actualmente, siendo base fundamental para otras áreas de las ... -
Un modelo biogeoquímico para el Golfo de Nicoya, Costa Rica
(Universidad de Costa Rica, 2007)In agreement with the Broecker and Penn two-boxes model, I generated a biogeochemical balance model for the Gulf of Nicoya (Guanacaste, Costa Rica) using two nutrient reservoirs: surface water and deep water. The mixing ... -
Modificación del índice de calidad de riberas: Inclusión del componente social en la evaluación de la calidad ribereña de la microcuenca del río Burío-Quebrada Seca
(Universidad Nacional (Costa Rica), 2017-01-31)Esta investigación se basó en la comparación de los resultados obtenidos mediante la aplicación del índice de calidad de riberas-QBR (Munné et al., 2003) y el índice de calidad de riberas modificado-QBRm (Araya y Fernández, ... -
Molecular identification of Streptococcus sp. and antibiotic resistance genes present in Tilapia farms (Oreochromis niloticus) from the Northern Pacific region, Costa Rica
(European Aquaculture Society (Bélgica), 2021-07-24)Streptococcosis is a bacterial disease in tilapia that produces economic losses, caused mainly by Streptococcus agalactiae and S. iniae. It is treated using oxytetracycline and florfenicol, which when inappropriately ... -
Morfometría, época reproductiva y talla comercial de Macrobrachium americanum (crustacea: palaemonidae) en Guanacaste, Costa Rica
(Universidad Nacional, Costa Rica, 1996)Macrobrachium americanum was collected in the San Amires River, Santa Cruz, Guanacaste, Co sta Rica (lOO 22' 00" N; 85043' 00" W), from March 1984 to Apri11985. Fo r 290 specimens the relationship tota l lengthto tal ... -
Moribaetis brachiostrinus (Ephemeroptera: Baetidae), a new species of mayfly from Costa Rica
(Magnolia Press, 2018)A new species of Moribaetis is described based on nymphs from the Nicoya peninsula. The new species can be distin guished from the other described species of the genus, among other characteristics, by its short antennae, ...