Browsing Artículos científicos by Title
Now showing items 80-99 of 507
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Characteristics of the venoms and digestive secretions of Aphonopelma seemanni and Sphaerobothria hoffmanni (Araneae: Theraphosidae) of Costa Rica
(Universidad de Costa Rica, 1987)A comparison of some components of the venoms of two Costa Rican tarantulas, Aphonopelma seemanni (Cambridge) and Sphaerobothria hoffmanni (Karsch) by polyacrylamide gel electrophoresis shows patterns similar to those of ... -
Characterization of sandy beaches of the Southern Caribbean of Costa Rica
(Instituto Tecnológico de Costa Rica, 2021-07)Las zonas costeras son ambientes dinámicos que brindan múltiples servicios ecosistémicos. La influencia de factores naturales y antrópicos conducen cambios cada vez más drásticos, que generan impactos negativos en la ... -
Characterization of the coral communities and reefs ot two previously underscribed locations in the upwelling region of Gulf of Papagayo Costa Rica
(Universidad Nacional (Costa Rica), 2010)In the seasonal upwelling region of Gulf of Papagayo (Northern Pacific coast of Costa Rica), we evaluated and described two previously poorly known coral habitats, Punta Cacique and Bahía Guacamaya. Both localities differed ... -
Chemical tradeoffs in seed dispersal: defensive metabolites in fruits deter consumption by mutualist bats
(Oikos, 2015-09-08)Although fleshy fruits function primarily to attract seed dispersers, many animal‐dispersed fruits contain potentially toxic secondary metabolites. These metabolites can provide defense against seed predators and pathogens, ... -
Chromosome-Level Genome Reveals the Origin of Neo-Y Chromosome in the Male Barred Knifejaw Oplegnathus fasciatus
(Universidad Nacional (Costa Rica), 2020-04-24)The barred knifejaw, Oplegnathus fasciatus, is characterized by an X1X2Y system with a neo-Y chromosome for males. Here, a chromosome-level genome was assembled to investigate the origin of neo-Y chromosome to the male O. ... -
Cianobacterias bentónicas marinas en el Caribe central y sur de Costa Rica
(Universidad Nacional (Costa Rica), 2012-12)Las cianobacterias comprenden un grupo de microorganismos del dominio Bacteria (Woese et al. 1990) poco estudiado en Costa Rica. Los escasos trabajos realizados abordan temáticas relacionadas con la ocu-rrencia de ... -
Ciclo anual del fitoplancton en el lago de Rio Cuarto, Costa Rica
(Universidad Nacional [Costa Rica], 1989-01-01)El ciclo anual de fitoplancton y nutrientes (nitratos y ortofosfatos) del Lago Río Cuarto, Costa Rica, ha sido estudiado desde febrero de 1984 hasta marzo de 1985. Las muestras de agua se obtuvieron con un muestreador ... -
Citotaxonomía comparativa de tres especies de Cichlasoma (Pisces: Cichlidae) nativas de Costa Rica
(Universidad de Costa Rica, 1991)The karyotype oí three species oí CichlasofM: C. dOllii, C. managwmse and C. friedrichstali were studied. The number of diploid chromosomes is 2n=48 in the fust two species. Their karyotypes are composed of four pairs ... -
Cloning, purification and characterization of nigrelysin, a novel actinoporin from the sea anemone Anthopleura nigrescens
(Elsevier B.V., 2019)Actinoporins constitute a unique class of pore-forming toxins found in sea anemones that being secreted as soluble monomers are able to bind and permeabilize membranes leading to cell death. The interest in these proteins ... -
Cloning, purification and characterization of nigrelysin, a novel actinoporin from the sea anemone Anthopleura nigrescens
(Elsevier (Países Bajos), 2018-07-21)Actinoporins constitute a unique class of pore-forming toxins found in sea anemones that being secreted as soluble monomers are able to bind and permeabilize membranes leading to cell death. The interest in these proteins ... -
Coastal fisheries of Costa Rica
(Organización de las Naciones Unidas para la Alimentación y la Agricultura, 2011)Costa Rica is a small country, with a territory of 51 000 km2 (Figure 1). Due to the small and open economy, export of products is a major component in many industries, including fisheries. Joaquín and Windevoxhel (1998) ... -
Comparación de la composición química proximal de la carne de Anadara tuberculosa y A. similis (Bivalvia: Arcidae) de Chomes, Puntarenas, Costa Rica
(Universidad Nacional, Costa Rica, 2012-12)Se estudiaron la variación estacional de la composición química proximal y el contenido energético de la carne de las pianguas Anadara tuberculosa y A. similis. Mensualmente, entre marzo de 2010 y febrero de 2011, se ... -
Comparison of amino acid profiles of feeds and fish as a quicic metiiod for selection of feed ingredients: a case study for Colossoma mactopomum (Cuvier)
(John Wiley & Sons, 1996)The amino acid profile of Colossoma macropomum was determined. Indispensable amino acid levels were sim ilar to those reported in other fish species. Suitability of local. Costa Rican, ingredients as protein sources for ... -
Comparison of fatty acids profile of the gonads and eggs of Lutjanus guttatus(Perciformes: Lutjanidae) obtained from wild and captive broodstock
(Universidad Nacional (Costa Rica), 2020-01)The proportions of fatty acids present in eggs and gonads of wild and captive Lutjanus guttatus(Steindachner, 1869) were evaluated to assist in obtaining nutritional information necessary to ... -
El complejo Jamesonia flexuosa (Kunth) Christenh. (Pteridaceae) para el Neotrópico
(Universidad Nacional (Costa Rica), 2017-12)Los estudios del autor en el género Jamesonia Hook. & Grev. para el Neotrópico han resultado en la validación y combinación de tres taxa pertenecientes al grupo de frondas grandes y escandentes con ejes comúnmente flexuosos, ... -
El complejo Jamesonia flexuosa (Kunth) Christenh. (Pteridaceae) para el Neotrópico
(Universidad Nacional (Costa Rica), 2017-12)Los estudios del autor en el género Jamesonia Hook. & Grev. para el Neotrópico han resultado en la validación y combinación de tres taxa pertenecientes al grupo de frondas grandes y escandentes con ejes comúnmente flexuosos, ... -
Complementary Notes On The White Shrimp Fishery In The Gulf Of Nicoya, Costa Rica
(Universidad Nacional, Costa Rica, 2006)In addition to the information provided on the white shrimp fishery in the Gulf of Nicoya, Costa Rica, in our recent paper in Crustaceana (Tabash-Blanco & Chávez, 2006), we consider that a couple of aspects require some ... -
Comportamiento reproductivo, forrajeo y uso de hábitat de Coccyzus ferrugineus (Cuculiformes: Cuculidae) en la Isla del Coco, Costa Ric
(Universidad de Costa Rica, 2020-03-24)Introducción: Coccyzus ferrugineus is the least studied endemic bird of Isla del Coco, many aspects of its natural history and behavior remain unknown, being one the least known species in Costa Rica. Objective: To describe ... -
Composición bioquímica de la carne de Polymesoda radiata (Bivalvia: Corbiculidae) en Costa Rica
(Universidad de Costa Rica, 1998)Monthly changes in biochemical composition and condition index of the green clam, Polymesoda radiata were studied from August 1992 tbrough July 1993 in Bebedero river, Guanacaste, Costa Rica. This species has a continuous ... -
Composición proximal en algunas especies de pescado y mariscos disponibles en el pacífico costarricense.
(Universidad Nacional, Costa Rica, 2017-01-31)El pescado y los mariscos son alimentos de los más completos por su calidad y cantidad de nutrientes; sin embargo, poco se sabe sobre la composición química de los recursos pesqueros del pacífico costarricense. Por tal ...