Listar Biología por título
Mostrando ítems 97-116 de 1644
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Algoritmos de aprendizaje automático en la identificación de miARNS potencialmente asociados a discapacidades intelectuales no sindrómicas
(2022-05-20)Las Discapacidades intelectuales (IDs) son un grupo de trastornos del neuro-desarrollo con una alta heterogeneidad fenotípica y genotípica. La asociación de elementos genéticos, como genes, micro-ARNs o ARNs largos no ... -
Algunos Detalles Ultraestructurales de la Morfología Externa del Adulto y la Deutoninfa de Allonothrus neotropicus1 en Costa Rica
(2017-09)Se analiza la ultraestructura de Allonothrus neotropicus con ejemplares recolectados en hojarasca de suelo de la región Caribe de Costa Rica. Los caracteres que definen esta especies son: 1) seta e1 el doble de larga que ... -
Alimentacion de pichones, exito reproductivo y notas sobre cuido parental en yiguirros (Turdus grayi): el rol de las hembras y machos
(2018)Las hembras frecuentemente invierten ma ́s que los machos en cuido parental, pero en sistemas sociales monogamos, los machos invierten tanto como las hembras en el cuido de su progenie y se estima que esta contribucion ... -
Alkaloids from Crinum erubescens Aiton
(2016-09)Eight alkaloids have been identified from fresh leaves of Crinum erubescens (Amaryllidaceae) collected in Costa Rica. The alkaloid 1-epidemethylbowdensine, detected by means of GC–MS as part of a global Amaryllidaceae ... -
All-offspring natal philopatry in a Neotropical bat
(2011-11)Natal dispersal is a strategy employed by individuals to avoid reproducing with close relatives. In most bats, incestuous matings are prevented by the departure of one sex; thus, all-offspring philopatry has rarely been ... -
Allometry and stilt root structure of the Neotropical palm Euterpe precatoria (Arecaceae) across sites and successional stages
(2010)The lack of secondary meristems shapes allometric relationships of the palms, infl uencing species segregation according to their capacity to adjust form and function to spatial and temporal changes in environmental ... -
La alometría estática de estructuras bajo selección sexual.
(2012-04-24)El proyecto se diseñó para determinar la alometría del tamaño de las estructuras genitálicas y otras no-genitálicas en varias especies de Coleoptera. El informe es una lista de las publicaciones generadas a partir de la ... -
Alta capacidad de autofecundación y baja visitación de polinizadores en la epífita polinizada por colibríes Pitcairnia heterophylla (Bromeliaceae) en un bosque montano en Costa Rica
(2017)La subfamilia Pitcairnioideae es la segunda más diversa de las bromelias (Bromeliaceae), un grupo exclusivo de la región Neotropical. Las bromelias pitcairnioideas poseen rasgos florales que se asume promueven el exo-cruzamiento ... -
Ammonium and phosphate removal using batch laboratory cultures by microalgae and cyanobacteria isolated from Costa Rica water bodies
(2018)This research analyzed three green microalgae (Scenedesmus sp., Chlamydomonas sp., and Chlorella sp.) and two cyanobacteria (Synechocystis sp. as unicellular strain and Nostoc sp. as filamentous strain) native from Costa ... -
Amphibians and Reptiles of the Tirimbina Biological Reserve: a baseline for conservation, research and environmental education in a lowland tropical wet forest in Costa Rica
(2020-11-30)The Tirimbina Biological Reserve is located in the lowlands on the Atlantic versant of Costa Rica. This study provides an updated comprehensive herpetofauna species list and summarizes the results of all the herpetofauna ... -
An eccentric new species of Stelis from Peru (Orchidaceae: Pleurothallidinae)
(2017)Stelis hualluapampensis, a new species from the cloud forests of Hualluapampa, in the Tayacaja province, Peru, is described and illustrated. Information on its distribution, habitat, phenology, and conservation status, ... -
An Insect Herbivore Microbiome with High Plant Biomass-Degrading Capacity
(PLoS Genetics. September 2010. Volume 6, Issue 9. e1001129, 2010-09)Herbivores can gain indirect access to recalcitrant carbon present in plant cell walls through symbiotic associations with lignocellulolytic microbes. A paradigmatic example is the leaf-cutter ant (Tribe: Attini), which ... -
An overview of bird records committees in the Neotropics
(2018)Neotropical bird records committees have been growing in numbers, remit and prominence in recent years. This feature – by members of those committees – explains how and why committees were established and encourages birders ... -
An unusual disjunction in Loasaceae: Central American Chichicaste grandis is nested in Brazilian Aosa
(2018)The highly distinctive genus Chichicaste is restricted to the Costa Rica-Chocó Biogeographic Hotspsot from Costa Rica to northwestern Colombia and comprises a single species, C. grandis. Relationships of this taxon have ... -
An update on the myxomycete biota (Amoebozoa: Myxogastria) of Colombia
(2012-08-01)Twelve new records of myxomycetes are reported for Colombia. These additions increase the number of myxomycetes known from this country to 108 species. Since the Colombian territory is part of a biodiversity-rich region in ... -
Analysis of genetic diversity of Cucurbita moschata (D.) germplasm accessions from Mesoamerica revealed by PCR SSCP and chloroplast sequence data
(2012-02)The aim of this research was the genetic characterization of 218 accessions of Cucurbita moschata Duchesne, a squash, and its relationship with morphological characteristics of agronomic interest, which are part of the ... -
Anathallis transtalamancana Karremans & Chinchilla, sp. nov.
(2020-08-18)The new species is similar to A. endresii (Luer) Pridgeon & M.W.Chase, but can be distinguished by the 1-2-flowered raceme (vs. 3-4-flowered), the yellowish (vs. purple), glabrous, 4.6-4.8 mm long sepals (vs. ciliate, ...