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Hemidactylus frenatus (Common House Gecko). Diet
(2017)Hemidactylus frenatus is an invasive species in the Americas that has succeeded in establishing populations in Costa Rica (Savage 2002. The Amphibians and Reptiles of Costa Rica: A Herpetofauna between Two Continents, ... -
Un herbario de Costa Rica llega a 75 años
(2006)Desde diciembre de 2005, el Herbario de la Universidad de Costa Rica (USJ) lleva el nombre de uno de sus fundadores: el Dr. Luis A. Fournier. En 2006 este herbario cumplió 75 años de contribuir con la investigación ... -
El Herbario USJ de Costa Rica: trayectoria y contribuciones
(2012)En 2011 el Herbario USJ de Costa Rica cumplió 80 años y llegó a 100 000 especímenes de todos los taxa que estudia la botánica. Se anotan datos y cifras sobre historia, fundadores y contribuciones de USJ al conocimiento ... -
La herencia: Jornada de estudio (ARPAMEC)
(1981-03-05)El documento contiene el material utilizado en una jornada de estudio de la Asociación Regional para el Mejoramiento de la Enseñanza de las Ciencias (ARPAMEC), que se realizó en el transcurso del primer semestre del año ... -
Heteromysis cocoensis n. sp. (Crustacea: Mysida: Mysidae) from coastal waters of Isla del Coco, Costa Rica
(2018)A survey of the invertebrate fauna of coral reef hard bottom communities in the shallow waters of Isla del Coco yielded a new species of mysid belonging to the genus Heteromysis S. I. Smith, 1873. Heteromysis (Olivemysis) ... -
Hidrocarburos cuticulares: su potencial como estímulo para el reconocimiento de parentela en dos arañas subsociales anelosimus (Araneae: Theridiidae) y patrones de fijación de hilos de seda en la araña subsocial Anelosimus baeza (Araneae: Theridiidae)
(2019-09-27)El reconocimiento de parentela en grupos sociales de artrópodos puede ocurrir por diferentes tipos de estímulos, como por ejemplo los compuestos excretados de la cutícula. Un rasgo posiblemente ancestral de las arañas ... -
High Performance Graphene–Oxide–Metal Diode through Bias‐Induced Barrier Height Modulation
(2016)Graphene–oxide–metal diodes are presented whose performance is preserved even for thin oxide layers, as required for high frequency applications. The diodes, which rely upon bias-induced modulation of graphene's work ... -
Highly diverse fungal communities in carbon-rich aquifers of two contrasting lakes in Northeast Germany
(2019-10)Fungi are an important component of microbial communities and are well known for their ability to decompose refractory, highly polymeric organic matter. In soils and aquatic systems, fungi play an important role in carbon ... -
Historia natural y repertorio acústico del Sancuinclas (Pezopetes capitalis), ave endémica de Costa Rica y el oeste de Panamá
(2014)El Sancuinclas es una especie endémica y un habi- tante común del sotobosque de bosques montanos y páramo en las tierras altas de Costa Rica y el oeste de Panamá. A pesar de ser una especie común, existía poca información ... -
Un híbrido espontáneo entre Aristolochia gorgona y A. grandiflora (Aristolochiaceae)
(2005)A spontaneous hybrid between Aristolochia gorgona and A. grandiflora appeared at Lankester Botanical Garden, Costa Rica, where plants of both species were cultivated in close proximity. This indicates that geographic ... -
Híbridos silvestres de patos (Anseriformes: Anatidae) registrados en Costa Rica
(2016-09)Informamos la existencia de tres híbridos silvestres de patos en Costa Rica, basados en observaciones esporádicas en el país. Adicionalmente, proveemos una explicación de cuáles, serían las especies que dieron origen a ... -
Homoplasious colony morphology and mito-nuclear phylogenetic discordance among Eastern Pacific octocorals
(2016)Octocorals are a diverse and ecologically important group of cnidarians. However, the phylogenetic relationships of many octocoral groups are not well understood and are based mostly on mitochondrial sequence data. In ... -
Horichia dressleri. A new genus recorded for Costa Rica and a truly rare orchid?
(2017)Orchid collectors, as well as scientists, know that some species are rarer than others. “Know” should perhaps be used in this context with some caution as, in general, rarity is something closer to a perception than ... -
Horichia Jenny
(2022)Rarity, in orchids, is often closer to a perception than to a specific category of frequency, assessed on the basis of documented data. Rare species are frequently only a way to say that they are rarely seen in living ... -
Hot carrier extraction from multilayer graphene
(2016)Hot carriers in semiconductor or metal nanostructures are relevant, for instance, to enhance the activity of oxide-supported metal catalysts or to achieve efficient photodetection using ultrathin semiconductor layers. ... -
House Wrens Troglodytes aedon reduce repertoire size and change song element frequencies in response to anthropogenic noise
(2020-06-09)Anthropogenic noise (≤ 3 kHz) can affect key features of birds’ acoustic communication via two different processes: (1) song-learning, because songbirds need to hear themselves and other birds to crystallize their song, ... -
How many species of Pleurothallidinae are there?
(2019)Subtribe Pleurothallidinae is possibly the most species-rich of all orchid groups. Nevertheless, they are a young group of plants in terms of scientific learning. The last three decades have been the most active with respect ...