Browsing Artículos científicos by Title
Now showing items 230-249 of 329
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Madurez sexual, Índice de condición y rendimiento de Pinctada mazatlanica (Pterioida: Pteriidae), Golfo de Nicoya, Costa Rica
(Universidad de Costa Rica, 1997)The reproductive cycle, condition index and meat yield of 627 specimens of pearl oyster, Pinctada mazat/anica were studied in Isla Pan de Azúcar, Golfo de Nicoya, Costa Rica from September 1993 through September ... -
Marea roja producida por Lingulodinium polyedrum (Peridiniales, Dinophyceae) en Bahía Culebra, Golfo de Papagayo, Costa Rica
(Universidad de Costa Rica, 2001)This is the first record of the dinoflagellate Lingulodinium polyedrum in a red tide bloom in the North Pacific coast of Costa Rica. The sample was collected on April 2000 at Culebra Bay, Gulf of Papagayo, ... -
Mass mortality of Canthigaster rostrata(Tetraodontiformes: Tetraodontidae) on the southern Costa Rican Caribbean coast
(Universidad Nacional (Costa Rica), 2018-01) -
Mesoamerican tree squirrels evolution (Rodentia: Sciuridae): a molecular phylogenetic analysis
(Universidad de Costa Rica, 2014)The tribe Sciurini comprehends the genera Sciurus, Syntheosiurus, Microsciurus, Tamiasciurus and Rheinthrosciurus. The phylogenetic relationships within Sciurus have been only partially done, and the relation ship between ... -
Microhabitat heterogeneity associated with Vanilla spp. and its influences on the microbial community of leaf litter and soil
(Springer Nature, 2020-09)The impact of forest microhabitats on physiochemical properties of the soil and that of microbial communities on tropical soils remain poorly understood. To elucidate the effect of tropical forest stand on leaf litter ... -
Un modelo biogeoquímico para el Golfo de Nicoya, Costa Rica
(Universidad de Costa Rica, 2007)In agreement with the Broecker and Penn two-boxes model, I generated a biogeochemical balance model for the Gulf of Nicoya (Guanacaste, Costa Rica) using two nutrient reservoirs: surface water and deep water. The mixing ... -
Morfometría, época reproductiva y talla comercial de Macrobrachium americanum (crustacea: palaemonidae) en Guanacaste, Costa Rica
(Universidad Nacional, Costa Rica, 1996)Macrobrachium americanum was collected in the San Amires River, Santa Cruz, Guanacaste, Co sta Rica (lOO 22' 00" N; 85043' 00" W), from March 1984 to Apri11985. Fo r 290 specimens the relationship tota l lengthto tal ... -
Moribaetis brachiostrinus (Ephemeroptera: Baetidae), a new species of mayfly from Costa Rica
(Magnolia Press, 2018)A new species of Moribaetis is described based on nymphs from the Nicoya peninsula. The new species can be distin guished from the other described species of the genus, among other characteristics, by its short antennae, ... -
Mortalidad embrionaria y éxito de eclosión en huevos de Trachemys scripta (Testudines: Emydidae) incubados en un área natural protegida
(Universidad de Costa Rica, 1996)In the northeast of Costa Rica, ilIega! collecting, habitat destruction and heavy predation 011 adult females, young and eggs of Trachemys scripta produced a population decline in recent years. The slider tUltle has a ... -
Natalidad de Chelydra serpentina (Testudines: Chelydridae) en Costa Rica
(Universidad de Costa Rica, 1996)Three Chelydra serpentina nests were monitored from September through October 1993. Maximum natality was 92% (mean 33.73%) and seemed to be associated with high temperature potasium and a moderate concentration of calcium ... -
Native plants for erosion control in urban river slopes [Plantas nativas para el control de la erosión en taludes de ríos urbanos] [Plantas nativas para controlo da erosão em taludes de rios urbanos]
(2014)Mechanical and structural erosion of soils is produced by the loss of the vegetal cover and the action of rain on unprotected surfaces. Raindrop impact, transport and sediment deposition leads to landslides and slope ... -
Neighborhood structure influences the convergence in light capture efficiency and carbon gain: An architectural approach for cloud forest shrubs
(Tree Physiology vol.36 no.6 712-724 2016, 2016-03-24)Although plant competition is recognized as a fundamental factor that limits survival and species coexistence, its relative importance on light capture efficiency and carbon gain is not well understood. Here, we propose a ... -
Neighbourhood structure and light availability influence the variations in plant design of shrubs in two cloud forests of different successional status
(Annals of Botany, 2016-07)Background and Aims Plant design refers to the construction of the plant body or its constituent parts in terms of form and function. Although neighbourhood structure is recognized as a factor that limits plant survival ... -
Neotropical flowering epiphyte diversity: local composition and geographic affinities
(Universidad Nacional, Costa Rica, 2013)Worldwide, the highest diversity of vascular epiphytic plants resides in the Neotropics. The general pattern of taxonomic composition of the neotropical epiphytic flora has been described, but information regarding the ... -
Nesting ecology of East Pacific green turtles at Playa Cabuyal, Gulf of Papagayo, Costa Rica
(2014-07)East Pacific green turtles (Chelonia mydas), often referred to as black turtles, are smaller and exhibit a lower reproductive output than other populations of green turtles in the Atlantic, Indian and Western Pacific Oceans. ... -
New records of snipe eels (Anguilliformes: Nemichthyidae) from the Pacific coast of lower Central America
(Marine Biodiversity Records vol.9 no.1 1-6 2016, 2016)Background: New records of occurrence of two snipe eels (Avocettina bowersii and Nemichthys scolopaceus), poorly known for the Pacific coast of Costa Rica and Panama are herein reported. Results: Specimens, 45 in total (28 ... -
New sighting of seagrasses in the Eastern Tropical Pacific (Bahía Potrero, Costa Rica)
(Elsevier B.V., 2018-07-22)Seagrass meadows provide a multitude of ecosystem services, yet they are currently threatened and declining worldwide due to anthropogenic impacts. Current knowledge of seagrass presence in the Eastern Tropical Pacific ... -
New species of Potamocoris Hungerford (Heteroptera, Potamocoridae) from Costa Rica and a key to the species
(Magnolia Press, 2014-11)A new potamocorid species, Potamocoris sitesi NEW SPECIES, with its two wing morphs (coleopteroid and macropterous) are described from Costa Rica. Descriptions are supported with photographs and illustrations. Parameres ... -
Nitrogen budget and fluxes in Colossoma macropomum ponds
(Blackwell Publishing Ltd., 2005-07-01)This study quanti¢ed the accumulation of nitrogen (N) in the water column, sediments, ¢sh and seepage water during a production cycle of Colossoma macropomum. By combining estimates of the deposition rates of uneaten feed, ... -
Nivel de desarrollo de las competencias científicas en estudiantes de secundaria de (Mendoza) Argentina y (San José) Costa Rica
(Organización de Estados Iberoamericanos, 2011)Una de las premisas que se maneja con más fuerza en la actualidad es que la sociedad organiza los procesos educativos formales con el propósito de integrar a todos sus miembros en la construcción de la tradición ...
