Browsing Ciencias básicas by Title
Now showing items 739-758 of 3122
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Cues guiding uloborid construction behavior support orb web monophyly
(2015)Behavior can provide useful traits for testing phylogenetic hypotheses, and some details of orb web construction behavior have been especially useful in characterizing higher-level groups in spiders. The cues used to guide ... -
Cultivation potential of Vanilla crop wild relatives in two contrasting land use systems
(2023)Vanilla is an important cash crop for many smallholder farmers around the tropics, and a highly appreciated spice used in a wide range of products. The crop species Vanilla planifolia is, however, facing a number of threats ... -
Curculionid beetles in aborted flower buds and immature fruits of Ceiba pentandra (Bombacaceae)
(2008)We determined the incidence of curculionid beetles of the genus Lonchophorus on aborted and not aborted flower buds and developing fruits of the tree Ceiba pentandra in southeastern Costa Rica. Beetle larvae were found in ... -
Current approaches to the isolation and structural elucidation of active compounds from natural products
(2018)The essence of medicinal plants, either as pure compounds or as standardized extracts, provides unlimited opportunities for new drug leads because of the unmatched availability of chemical diversity. Due to an increasing ... -
Cyrtidiorchis gerardii
(2017)Cyrtidiorchis Rauschert is a small genus of some fve species distributed from Colombia and Venezuela to Peru, phylogenetically related to Sauvetrea Szlach. and Mormolyca Fenzl (Maxillarinae). Tey are characterized by ... -
Cytological Identification of Chromosomal Rearrangements in Doritaenopsis and Phalaenopsis
(Journal of International Cooperation (Taiwan) 2(1): 1-11, 2007-09-01)This study investigated the impact of gross chromosomal rearrangements, specifically translocations and inversions, on the division of pollen mother cells in hybrids Dtps. Queen Beer, Dtps. Sinica Sunday, Dtps. Sweet ... -
Daños, efectos y amenaza de tsunamis en América Central
(2002)Desde 1539 hasta el presente han habido 49 tsunamis en América Central, 37 en el Pacífico y 12 en el Caribe; 10 de ellos tienen reportes de daños, siete en el Pacífico y tres en el Caribe. Estos tsunamis han cobrado cerca ... -
Datación por 210Pb y 137Cs en suelos sedimentarios
(2021)El uso de técnicas analíticas nucleares para datación tiene una gran cantidad de aplicaciones en diferentes ramas del conocimiento. La información extraída por el análisis permite asignar a un perfil de muestras el fechado ... -
Dataducto para construir Emuladores Estadísticos con datos de NARCCAP
(2019-01-25)El proyecto de investigación B7166 de la Universidad de Costa Rica tiene como objetivo principal presentar un marco estadístico para realizar una emulación de variables obtenidas por medio del Modelo Climático Regional ... -
Day/night change in orientation of the orb-weaver Azilia guatemalensis (Araneae: Tetragnathidae)
(2021)Most orb weavers orient downward on their orbs, but here we describe an unusual pattern of orientation in the tetragnathid Azilia guatemalensis. This species changes its orientation on the hub with a consistent day/night ... -
Decapods crustaceans associated with macroinvertebrates in the Pacific of Costa Rica
(2021)Decapod crustaceans are a diverse group that exploits various types of habitats in Costa Rica, where they represent 8.1% of the marine diversity of the country. This group includes families containing species with strictly ... -
Deciding the status of controversial phonemes using frequency distributions; An application to semiconsonants in Spanish
(2018)Exploiting the fact that natural languages are complex systems, the present exploratory article proposes a direct method based on frequency distributions that may be useful when making a decision on the status of problematic ... -
Deciphering key processes controlling rainfall isotopic variability during extreme tropical cyclones
(2019)The Mesoamerican and Caribbean (MAC) region is characterized by tropical cyclones (TCs), strong El Niño-Southern Oscillation events, and climate variability that bring unique hazards to socio-ecological systems. Here we ... -
Decisions during courtship by male and female medflies (Diptera, Tephritidae): Correlated changes in male behavior and female acceptance criteria in mass-reared flies
(Florida Entomologist 85(1):14-31. 2002, 2002-12)Análisis de más de 300 cortejos video-grabados de moscas del Mediterráneo silvestres y criadas en masas de Costa Rica demostraron que la tendencia de los machos y las hembras de alinearse cara a cara el uno frente al otro ... -
Definable Additive Subgroups of Partial Differential Fields of Characteristic Zero with an Automorphism
(2020-10-19)Abstract.The theory of partial differential fields of characteristic zero withan automorphism has a model companion denoted DCFmA. This theory isnot complete, but its completions are easily discribed. They are supersimpleand ... -
Definición de los servicios ecosistémicos, su valoración económica y su afectación por el cambio climático
(2023-02-22)Se presentan cinco infografías relacionadas con la definición de los servicios ecosistémicos, su valoración económica y su afectación por el cambio climático. Se muestran también algunos de los servicios ecosistémicos de ... -
Defining Generic Limits in Maxillaria. A Return to the Orchidaceous Mine
(2011)If one goes orchid hunting in the forests of Central or South America, odds are that one of the first orchids you will encounter will be a Maxillaria or one of its close relatives. Maxillarias comprise a large percentage ... -
Deformación sísmica reciente de la Sierra de Pie de Palo, Provincia de San Juan
(2014)En este trabajo se estudia la actividad sísmica en la sierra de Pie de Palo durante enero 2008 a diciembre 2009. Los datos utilizados fueron registrados por 52 estaciones sismológicas de los experimentos SIEMBRA y ESP. En ... -
Degree of intervention affects interannual and within-plot heterogeneity of seed arrival in tropical forest restoration
(2021-05-11)In degraded tropical landscapes, lack of seed dispersal can strongly limit recovery, and restoration interventions can overcome this barrier by attracting dispersers. However, seed dispersal patterns are typically studied ...