Browsing Biología by Title
Now showing items 433-452 of 851
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Gastric cancer in the era of immune checkpoint blockade
(2019-09-24)Gastric cancer (GC) is one of the most important malignancies worldwide because of its high incidence and mortality. The very low survival rates are mainly related to late diagnosis and limited treatment options. GC is the ... -
La genealogía de doña Isabel Jiménez. Una aproximación a la primera fase del mestizaje en Costa Rica
(Orígenes. Revista de la Asociación de Genealogía e Historia de Costa Rica, 1(1), 271-284, 2012)The genealogy of doña Isabel Jiménez is a evidence of Spanish-Amerindian admixture since the early Spanish Colony in Costa Rica. The observed a DNA lineage wich has an Amerindian ancestry in a a deep matrilineal genealogy. ... -
Genera Pleurothallidinarum: the era of Carlyle Luer
(2017)The era or Carlyle Luer, which currently comprehends the forty-two years since the publication of the first Icones Pleurothallidinarum in 1975, has witnessed a true revolution in the knowledge and understanding of the ... -
Genetic analysis of the dry forest timber tree Sideroxylon capiri in Costa Rica using AFLP
(2015-01)Sideroxylon capiri (“Tempisque”) is a threatened and economically important timber species in the dry forest of Costa Rica. To assess the extent of the genetic diversity between and within populations of this species, 86 ... -
Genetic And Morphological Variation Of The Sooty-capped Bush Tanager (Chlorospingus Pileatus), A Highland Endemic Species From Costa Rica And Western Panama
(2010)We examined the effect of geographic isolation on morphology, genetic structure, and abundance of the Sooty-capped Bush Tanager (Chlorospingus pileatus), an endemic species restricted to highlands of Costa Rica and western ... -
Genetic contributions to circadian activity rhythm and sleep pattern phenotypes in pedigrees segregating for severe bipolar disorder
(2016-02-09)Abnormalities in sleep and circadian rhythms are central features of bipolar disorder (BP), often persisting between episodes. We report here, to our knowledge, the first systematic analysis of circadian rhythm activity ... -
Genetic diversity and reproductive biology of the dioecious and epiphytic bromeliad Aechmea mariae-reginae (Bromeliaceae) in Costa Rica: implications for its conservation
(2019)Ecological traits and pollination mode associated with dioecious sexual expression in plants are likely to influence their reproductive success and levels of genetic diversity. Dioecy is an uncommon condition in Bromeliaceae. ... -
Genetic Diversity and Spatial Genetic Structure of an Epiphytic Bromeliad in Costa Rican Montane Secondary Forest Patches
(2014)Information on genetic variation and its distribution in tropical plant populations relies mainly on studies of ground‐rooted species, while genetic information of epiphytic plants is still limited. Particularly, the effect ... -
Genetic diversity in Oryza glumaepatula wild rice populations in Costa Rica and possible gene flow from O. sativa
(2016-04-07)Wild crop relatives are an important source of genetic diversity for crop improvement. Diversity estimates are generally lacking for many wild crop relatives. The objective of the present study was to analyze how genetic ... -
Genetic diversity in the endangered tropical tree, Guaiacum sanctum (Zygophyllaceae)
(2010)Fragmentation of tropical forests has changed continuous tropical landscapes into a network of poorly connected fragments, reducing population sizes and potentially increasing genetic isolation. This study quantifies genetic ... -
Genética y ecología de la regeneración de robledables fragmentados en Costa Rica: efecto de mamíferos pequeños en la disperción de semillas y el establecimiento de plántulas.
(2011-08-09)Este proyecto estudió el papel de los mamíferos pequeños (especialmente roedores) en la dinámica de la regeneración de los bosques de roble en las zonas altas de Costa Rica, específicamente en el Cerro de la Muerte. Los ... -
Genome Sequencing of Sulfolobus sp. A20 from Costa Rica and Comparative Analyses of the Putative Pathways of Carbon, Nitrogen, and Sulfur Metabolism in Various Sulfolobus Strains
(2016-11-30)The genome of Sulfolobus sp. A20 isolated from a hot spring in Costa Rica was sequenced. This circular genome of the strain is 2,688,317 bp in size and 34.8% in G+C content, and contains 2591 open reading frames (ORFs). ... -
Genome-wide QTL analysis for anxiety trait in bipolar disorder type I
(2017)Background Genetic studies have been consistent that bipolar disorder type I (BPI) runs in families and that this familial aggregation is strongly influenced by genes. In a preliminary study, we proved that anxiety trait ... -
Geographic variation in aggressive signalling behaviour of the Jacky dragon
(2015)Signal diversification is often the product of sexual and/or natural selection and may be accompanied by genetic differentiation or simply reflect a plastic response to social and environmental variables.We use an agamid ... -
El género Elaphrothrips Buffa, 1909 (insecta, thysanoptera, tubulifera) en América Central, discusión del concepto de especie y descripción de especies nuevas para Costa Rica
(2015-08)Se analiza el concepto de especie dentro del género Elaphrothrips, así como los problemas de criterios taxonómicos relacionados a este grupo. Además, se discuten las variaciones morfológicas del mismo y se presentan las ... -
El género Trybomia Karny 1911 en América Central (Insecta: Thysanoptera)
(2015-02-27)El género Trybomia Karny 1911 cuenta con pocas especies, todas en el Neotrópico. La última especie se describió hace 82 años según los datos expuestos en la literatura. El material de estudio se obtuvo de muestreos llevados ... -
Grado de vulnerabilidad ante la presencia del cocodrilo americano (Crocodylus acutus) en cinco comunidades costeras de la Región Pacifico Central de Costa Rica, 2017 - 2018
(2020-09)El conflicto entre seres humanos y animales silvestres es un fenómeno recurrente a nivel mundial y que se origina desde que ambos comparten los mismos hábitats y recursos. Entre el 2017 y el 2018, se evaluó el grado de ... -
Greenidea psidii (Hemiptera: Aphididae: Greenideinae) New Invasive Aphid in Costa Rica
(2009-06)Greenidea (Trichosiphum) psidii van der Goot 1916 is recorded for the first time in Costa Rica and Central America. The species has been recorded on Psidium guajava, Psidium friedrichst halianum and Myrciaria cauliflora ... -
Ground Anoles (Anolis humilis) Discriminate between Aposematic and Cryptic Model Insects
(2016)Aposematic coloration allows predators to use visual cues to avoid eating potentially toxic or distasteful prey. Predators across many animal taxa actively avoid aposematically colored prey and remember distasteful brightly ...