Browsing Artículos científicos by Title
Now showing items 1-20 of 64
-
A checklist of the amphibians and reptiles of Río Macho Biological Station, Provincia de Cartago, Costa Rica
(Check List vo.11 no.6 article 1784 1-10 2015, 2015-11-02)We provide a checklist of the amphibians and reptiles of Río Macho Biological Station (RMBS), Costa Rica. During a period of a year (2012–2013) we conducted visual and acoustic surveys in a natural mature forest plot (>50 ... -
A dynamic simulation model for the blooming of Oscillatoria agardhii in a monomictic lake
(Elsevier, 1995-01-15)The occurrence of phytoplankton blooms is a common problem in water bodies. The quantitative description of the algal population growth is of primary importance to understand the mechanisms which lead to these phytoplankton ... -
A simple method for short-term storage and transportation of spermatophores of Pacific white shrimp (Litopenaeus vannamei)
(Hidrobiológica vol.26 no.1 9-14 2016, 2016)The development of a shipping method for spermatophores of the white shrimp Litopenaeus vannamei would open new opportunities for sharing and improving genetic resources of shrimp worldwide. Seventy spermatophores were ... -
Amenaza de contaminación del agua subterránea en el sector norte del acuífero Barva, Heredia, Costa Rica
(2014-11)Most of the water for human consumption and the development of economic activities in the Central Valley of Costa Rica is supplied by the aquifers located in this region. Nevertheless, many of these activities are located ... -
Analysis of the HDG method for the stokes–darcy coupling
(Numerical Methods for Partial Differential Equations, 2017-02-03)In this article, we introduce and analyze a hybridizable discontinuous Galerkin (HDG) method for numerically solving the coupling of fluid flow with porous media flow. Flows are governed by the Stokes and Darcy equations, ... -
Aspects of the reproductive biology of the data-deficient Mustelus minicanis and M. norrisi (Chondrichthyes: Triakidae) in the southern Caribbean Sea
(Environmental Biology of Fishes, 2017-05)Reproduction and maturation in the economically important, but data-deficient, Mustelus minicanis and M. norrisi were analysed using catches of populations exploited by a gillnet fishery during two years in the southern ... -
Behavioral plasticity mitigates risk across environments and predators during anuran metamorphosis
(Behavioral Ecology, 2013)Most animals metamorphose, changing morphology, physiology, behavior and ecological interactions. Size- and habitat-dependent mortality risk is thought to affect the evolution and plastic expression of metamorphic timing, ... -
Biodeterioration and biodegradation of Roman monuments: A comparison of the current status of 18th century paintings by the Canalettos
(2014)Worldwide there is an urgent need to monitor the conditions of monuments affected by biodeterioration and biodegradation, but no long term data exist for most of them. Here is an exception in the case of certain Roman ... -
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, ... -
Composición y estructura forestal del Corredor Biológico Interurbano Río Tibás, Heredia, Costa Rica
(2018-01)This research had as objective to determine the forest structure and floristic composition of the “Tibás River Interurban Biological corridor” region. We delimit three elevational zones/strata in the area and established ... -
Conceptualization and validation of a dynamic model for the simulation of nitrogen transformations and fluxes in fish ponds
(Elsevier, 2002-11-01)Nitrogen is a key element in aquatic environments and an important pond management variable. In aquaculture systems, nitrogen accumulation eventually leads to a deterioration of the system. The interactions between various ... -
Contrasting patterns of leaf trait variation among and within species during tropical dry forest succession in Costa Rica
(Nature Publishing Group, 2018-01-10)A coordinated response to environmental drivers amongst individual functional traits is central to the plant strategy concept. However, whether the trait co-ordination observed at the global scale occurs at other ecological ... -
Desove espontáneo, ontogenia y crecimiento en cautiverio de Cynoscion squamipinnis (Perciformes: Sciaenidae)
(Revista de Biologia Tropical Vol.64 No.3 991 - 1005, 2016-04-04)Las corvinas son especies de interés comercial que han sido sobreexplotadas en el Golfo de Nicoya, Costa Rica. El objetivo de este estudio fue describir por primera vez, el desove espontáneo y la ontogenia de las larvas ... -
Determinación del flujo de agua para la biorremediación en sistemas acuícolas recirculados utilizando tapetes microbianos construidos
(2015-09-01)La cantidad de agua necesaria en los sistemas de producción aumenta con la Intensificación; se han establecido tasas económicas de uso. Esta situación ha obligado a los productores a diseñar sistemas que les permitan seguir ... -
Determination of water flow rate for bioremediation in recirculating aquaculture systems using constructed microbial mats
(2015)The effect of water flow rate was evaluated on the microbial mats efficiency to remove total ammonia nitrogen (TAN, NH4+-N+ NH3-N), nitrite (N-NO2-), nitrate (N-NO3-) and orthophosphate (P-PO4-3) in a pilot recirculation ... -
Determination of water flow rate for bioremediation in recirculating aquaculture systems using constructed microbial mats
(2015-07-01)Se evaluó el efecto del flujo de agua sobre la eficiencia de tapetes microbianos para remover nitrógeno amoniacal total (NAT, N-NH4+ + N-NH3), nitritos (N-NO2-), nitratos (N-NO3-) y ortofosfatos (P-PO4-3) en un sistema de ... -
Dinámica de uso de suelo y sitios prioritarios para la restauración forestal del Corredor Biológico Río Tibás, Costa Rica
(2019-06)An evaluation was conducted on landscape elements (land use, access roads, slopes, and environmental fragility) and trends in the use of soil during the period 2005-2016 in the area proposed for the Biological Corridor ... -
Distribución y abundancia de Caiman crocodilus en el Refugio Nacional de Vida Silvestre Caño Negro, Costa Rica
(Revista de Biología Tropical vol.51 no.2 571-578 2003, 2003)The distribution and abundance of a population of Caiman crocodilus fuscus were estimated by monthly counting of eyeshines at night, from February 1999 to March 2000 in six transects of Río Frío in the Caño Negro National ... -
Efecto de la fitasa en el aprovechamiento del fósforo en dietas para tilapia (Oreochromis niloticus). Resultados preliminares.
(UNICIENCIA, 2001-06-01)Con el fin de evaluar si mediante la adición de la enzima fitasa se puede aumentar la cantidad de fósforo (P) disponible en dietas comerciales de tilapia (Oreochromis niloticus) y con ello reducir su excreción al medio, ... -
Efecto del probiótico Bacillus subtilis sobre el crecimiento y alimentación de tilapia (Oreochromis niloticus) y langostino (Macrobrachium rosenbergii) en laboratorio
(Revista de Biología Tropical, 2004-12-01)Three experiments were conducted to analyze the effect of the probiotic Bacillus subtilis on the growth of juvenile tilapia (Oreochromis niloticus) and freshwater prawn (Macrobrachium rosenbergii). The experiments were ...
