Universidad de Costa Rica
  • Sobre Kérwá
  • Acceso Abierto
  • Cómo Depositar
  • Políticas
  • Contacto
    • español
    • English
  • English 
    • español
    • English
  • Login
Search 
  •   Kérwá Home
  • Investigación
  • Ciencias básicas
  • Biología
  • Search
  •   Kérwá Home
  • Investigación
  • Ciencias básicas
  • Biología
  • Search
JavaScript is disabled for your browser. Some features of this site may not work without it.

Search

Show Advanced FiltersHide Advanced Filters

Filters

Use filters to refine the search results.

Now showing items 1-10 of 850

  • Sort Options:
  • Relevance
  • Title Asc
  • Title Desc
  • Issue Date Asc
  • Issue Date Desc
  • Results Per Page:
  • 5
  • 10
  • 20
  • 40
  • 60
  • 80
  • 100
Thumbnail

Analysis of genetic diversity of Cucurbita moschata (D.) germplasm accessions from Mesoamerica revealed by PCR SSCP and chloroplast sequence data 

Barboza Vargas, Natalia María; Albertazzi Castro, Federico José; Sibaja Cordero, Jeffrey Alejandro; Mora Umaña, Floribeth; Astorga, Carlos; Ramírez Fonseca, Pilar (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 ...
Thumbnail

Genetic diversity in Oryza glumaepatula wild rice populations in Costa Rica and possible gene flow from O. sativa 

Fuchs Castillo, Eric J.; Meneses Martínez, Allan; Calvo Santana, Amanda; Muñoz García, Melania Nelly; Arrieta Espinoza, Griselda (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 ...

Conceptual and statistical problems with the use of the Shannon-Weiner entropy index in bioacoustic analyses 

Sandoval Vargas, Luis Andrés; Barrantes Montero, Gilbert; Wilson, David R. (2018-04-03)
Information theory and its indices were developed for human communication to predict the amount of information transferred in a message. One such index, the Shannon-Weiner index (SWI), has often been used to analyse ...
Thumbnail

Contrasting Thermal Strategies of Montane Neotropical Bats at High Elevations 

Garin, Inazio; Chaverri Echandi, Gloriana; Jimenez, Lide; Castillo Salazar, Cristian; Aihartza, Joxerra (2018)
In the Neotropics, captive vespertilionid bats substantially reduce their metabolic rate at low ambient temperatures, similar to their temperate counterparts, whereas the ability of phyllostomids to lower metabolic rate ...

Bemisia tabaci Biotype Q is present in Costa Rica 

Guevara Coto, José Andrés; Barboza Vargas, Natalia María; Hernández Jiménez, Eduardo José; Hammond, Rosemarie W.; Ramírez Fonseca, Pilar (2011)
Whiteflies are an insect group that comprises multiple species and biotypes, capable of affecting crops by phloem feeding, virus transmission and promotion of fungal colonization. The distribution of these pests is worldwide. ...
Thumbnail

Reproductive biology and behavior of Doru taeniatum (Forficulidae) 

Briceño Lobo, Daniel; Wolfganf, Schüch (Revista de BioIogía Tropical 36(2B): 437-440, 1988., 1988)
This study deals with the biology of Doru taeniatum, (Forficuüdae), particulary the habitat, feeding, reproduction, maternal care, and nymphal stages. The density of adults is higher in the older corn plants. The earwings ...

First Report of Tomato chlorosis virus Infecting Sweet Pepper in Costa Rica 

Vargas Zamora, José A.; Hernández Jiménez, Eduardo José; Barboza Vargas, Natalia María; Mora Umaña, Floribeth; Ramírez Fonseca, Pilar; Hammond, Rosemarie W. (2011-11)
In September 2008, a survey of whiteflies and whitefly-borne viruses was performed in 11 pepper-growing greenhouses in the province of Cartago, Costa Rica. During this survey, the vast majority of sweet pepper (Capsicum ...

A new Brachionidium (Orchidaceae: Pleurothallidinae) from the first botanical expedition to the Volcán Cacho Negro, Costa Rica 

Bogarín Chaves, Diego Gerardo; Karremans Lok, Adam Philip (2016-12)
A new species of Brachionidium from Costa Rica is described and illustrated. Brachionidium cornu-nigricum, from the Volcán Cacho Negro, a remote, previously unexplored location in Costa Rica, is most similar to B. filamentosum. ...

Ontogeny of an interactive call-and-response system in Spix's disc-winged bats 

Araya Salas, Marcelo; Hernández Pinsón, Héctor Andrés; Rojas, Nazareth; Chaverri Echandi, Gloriana (2020)
We investigated the ontogenetic changes of two call types, the inquiry call and the response call, which comprise an interactive communication system in Spix's disc-winged bats, Thyroptera tricolor. We documented structural ...

Complex phylogeographic patterns indicate Central American origin of two widespread Mesoamerican Quercus (Fagaceae) species 

Rodríguez Correa, Hernando; Oyama, Ken; Quesada Avendaño, Mauricio; Fuchs Castillo, Eric J.; Quezada Aguilar, Maura Liseth; Ferrufino Acosta, Lilian; Valencia Ávalos, Susana; Cascante Marín, Alfredo; González Rodríguez, Antonio (2017)
The northern Neotropical region is characterized by a heterogeneous geological and climatic history. Recent studies have shown contrasting patterns regarding the role of geographic elements as barriers that could have ...
  • 1
  • 2
  • 3
  • 4
  • . . .
  • 85

  • Repositorios universitarios

  • Repositorio del SIBDI-UCR
  • Biblioteca Digital del CIICLA
  • Repositorio Documental Rafael Obregón Loría (CIHAC)
  • Biblioteca Digital Carlos Melendez (CIHAC)
  • Repositorio de Fotografías
  • Colección de videos de UPA-VAS
  • Sitios recomendados

  • Buscador regional de LA Referencia
  • Buscador del Open ROAR
  • Scientific Electronic Library Online (SciELO)
  • Directory of Open Access Journals (DOAJ)
  • Redalyc
  • Redes sociales

  • facebook.com/repositoriokerwa
  • @Ciencia_UCR
  • Sobre Kérwá
  • Acceso Abierto
  • Cómo depositar
  • Políticas
Contact Us | Send Feedback
Repositorio Institucional de la Universidad de Costa Rica. Algunos derechos reservados. Este repositorio funciona con DSpace.
 

 

Browse

All of KérwáCommunities & CollectionsTitlesAuthorsSubjectsProcedenceTypeThis CollectionTitlesAuthorsSubjectsProcedenceType

My Account

LoginRegister

Discover

AuthorBarrantes Montero, Gilbert (81)Retana Salazar, Axel P. (41)Blanco Coto, Mario Alberto (38)Karremans Lok, Adam Philip (32)Cascante Marín, Alfredo (31)Pupulin, Franco (31)Bogarín Chaves, Diego Gerardo (30)Chaverri Echandi, Gloriana (28)Fuchs Castillo, Eric J. (27)Karremans Lok, Adam Philip (26)... View MoreType
artículo científico (850)
versión final del autor (2)contribución a revista (1)documentación técnica (1)otro (1)ProcedenceVicerrectoría de Investigación (535)Vicerrectoría de Docencia (484)Sedes Regionales (42)... View MoreHas File(s)Yes (806)No (44)

  • Repositorios universitarios

  • Repositorio del SIBDI-UCR
  • Biblioteca Digital del CIICLA
  • Repositorio Documental Rafael Obregón Loría (CIHAC)
  • Biblioteca Digital Carlos Melendez (CIHAC)
  • Repositorio de Fotografías
  • Colección de videos de UPA-VAS
  • Sitios recomendados

  • Buscador regional de LA Referencia
  • Buscador del Open ROAR
  • Scientific Electronic Library Online (SciELO)
  • Directory of Open Access Journals (DOAJ)
  • Redalyc
  • Redes sociales

  • facebook.com/repositoriokerwa
  • @Ciencia_UCR
  • Sobre Kérwá
  • Acceso Abierto
  • Cómo depositar
  • Políticas
Contact Us | Send Feedback
Repositorio Institucional de la Universidad de Costa Rica. Algunos derechos reservados. Este repositorio funciona con DSpace.