Biología
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Neurobehavioral Effects of Restricted and Unpredictable Environmental Enrichment in Rats
(2020-05)To study how motivational factors modulate experience-dependent neurobehavioral plasticity, we modify a protocol of environmental enrichment (EE) in rats. We assumed that the benefits derived from EE might vary according ... -
Acute stress differentially affects grooming subtypes and ultrasonic vocalisations in the open-field and home-cage test in rats
(2020-06)Grooming behaviour in rodents has been associated with emotional distress, especially in unfamiliar and aversive contexts. However, the biological function of grooming in such situations is still unclear. We hypothesised ... -
External Morphology of Tagosodes orizicolus (Homoptera: Delphacidae) Revealed by Scanning Electron Microscopy
(2001)A comprehensive analysis of the ultrastructure of the delphacid rice pest Tagosodes orizicolus (Muir) was undertaken using scanning electron microscopy to resolve taxonomic problems in the distinction of females and nymphs ... -
Widespread Occurrence of Black-Orange-Black Color Pattern in Hymenoptera
(2019)Certain color patterns in insects show convergent evolution reflecting potentially important biological functions, for example, aposematism and mimicry. This phenomenon has been most frequently documented in Lepidoptera and ... -
Spectral measure of color variation of black-orange-black (BOB) pattern in small parasitoid wasps (Hymenoptera: Scelionidae), a statistical approach
(2019)Small parasitoid wasps are abundant and extremely diverse, yet their colors have not been analyzed. One of the more common color patterns observed in these wasps is a black-orange-black pattern, which is especially common ... -
Rediscovering the value of families for psychiatric genetics research
(2018-06-28)As it is likely that both common and rare genetic variation are important for complex disease risk, studies that examine the full range of the allelic frequency distribution should be utilized to dissect the genetic ... -
Búsqueda y caracterización de proteínas biopesticidas novedosas a partir de cepas de Bacillus thuringiensis
(1999)En la actualidad se desarrollan y se cultivan comercialmente plantas transgénicas que expresan endotoxinas de Bacillus thuringiensis (Bt) como biopesticida para el control específico de insectos. Sin embargo, se teme que ... -
Connecting biology, optics and nanomechanical properties in micro-wasps
(2020)Coloration in insects provides a fruitful opportunity for interdisciplinary research involving both physics and biology, and for a better understanding of the design principles of biological structures. In this research ... -
Phenology of an urban population of Lyssomanes jemineus Peckham & Wheeler (Araneae: Salticidae) with a list of other jumping spiders from the same Costa Rican site
(2019)Jumping spiders were sampled for 24 months in a Costa Rican urban environment and one of the species collected, Lyssomanes jemineus, was observed in detail in order to document its phenology in this disturbed habitat. ... -
Plantas del Dosel del Bosque: Guía para la identificación de géneros de plantas epífitas con flores de Costa Rica
(2020-01-31)Plantas del Dosel del Bosque es una guía botánica que ofrece información sobre las “plantas epífitas”, que son aquellas plantas que se han especializado en vivir sobre otras plantas y se han independizado de las condiciones ... -
Soybean protease inhibitors increase Bacillus thuringiensis subs. israelensis toxicity against Hypothenemus hampei
(2020)The coffee berry borer (Hypothenemus hampei Ferrari, CBB) is one of the most devastating pests on coffee plantations around the world. Although CBB is susceptible to the effect of δ–endotoxins ... -
Contact calling in context: intra- and intergroup variation in vocalization rates depend on a call’s function
(2020)To maintain group cohesion while coordinating group movements, individuals might use signals to advertise the location of a route, their intention to initiate movements, or their position at a given time. In highly mobile ... -
Patrones de coloración en Hymenoptera: su origen, evolución y posible función en miras a la aplicación biomimética
(2020-04-28)El presente estudio proporciona la primera caracterización física y funcional del patrón negro-naranja-negro (BOB) que se encuentra en avispas parasitoides de muy pequeño tamaño (3-10 mm). Aunque se había reportado previamente ... -
Caracterización de los conflictos humano-felinos y otras especies silvestres en el área de amortiguamiento de la Reserva Biológica Alberto Manuel Brenes, 2017-2020
(2020)El aumento de la población humana ha ejercido presión sobre los recursos naturales razón por la cual fue necesario el establecimiento de áreas protegidas para conservar la biodiversidad. Sin embargo, cuando hay traslape ... -
Morfología, ecolocalización y uso de micro-hábitat de murciélagos del género Pteronotus (Chiroptera: Mormoopidae) en el Parque Nacional Barra Honda, Costa Rica
(2020)En el trópico hay una gran riqueza de especies de murciélagos insectívoros y esta riqueza se mantiene, en parte, por el reparto eficiente de los recursos ambientales. Estudios sobre la repartición de recursos entre los ... -
Myxomycetes collected in the eastern United States and patterns of relative biodiversity
(2020-01-05)A total of 68 315 digitised records of myxomycetes from the eastern United States were compiled from all readily available sources. After cleaning the database for inconsistencies, 58 594 records remained that were ... -
New insights into the molecular phylogeny of the swimming crabs of the genera Portunus Weber, 1795 and Achelous De Haan, 1833 (Brachyura: Portunidae) of the Americas
(2018)Earlier studies of swimming crabs (family Portunidae) in the Americas suggested polyphyly of Portunus Weber, 1795. Our previous molecular analyses provided evidence for a subdivision of the genus, resulting in a reassignment ... -
Seagrass organic carbon stocks show minimal variation over short time scales in a heterogeneous subtropical seascape
(2018)Blue carbon initiatives require accurate monitoring of carbon stocks. We examined sources of variability in seagrass organic carbon (Corg) stocks, contrasting spatial with short temporal scales. Seagrass morphology and ... -
ICSEM10 Slideshow
(2020-03-03)This is a slideshow produced for the 10th International Congress on the Systematics and Ecology of Myxomycetes, held in the city of Turrialba (UCR, Sede del Atlántico) in February 2020. -
The new Refugium Botanicum. Maxillariella (Maxillaria) tenuifolia
(2017)Maxillariella tenuifolia (Lindl.) M.A. Blanco & Carnevali, Lankesteriana 7(3): 530. 2007. Basionym: Maxillaria tenuifolia Lindl., Edwards’s Botanical Register 23: sub. t. 1986. 1837. Type: “a native of ...
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