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Analysis of the threat of groundwater contamination in the Jacó aquifer, Central Pacific, Costa Rica
(Universidad Nacional (Costa Rica), 2021-07-01)
[Introduction]: In Costa Rica, more than 70 % of the public drinking water supply comes from groundwater sources. In the coastal city of Jacó, on the Central Pacific Coast of Costa Rica, tourism activity ...
Producción de semilla de ostra (Crassostrea gigas) Selección de dos rasgos fenotípicos
(Universidad Técnica Nacional (UTN) (Costa Rica), 2012)
La actividad de producción de semilla de ostra Crassostrea gigas,
es una tecnología que ya se encuentra implementada en
forma exitosa en la Estación de Biología Marina de la Universidad
Nacional, Heredia, Costa ...
Estructura vegetal y flora asociada del manglar de Mata de Limón, Puntarenas, Costa Rica
(Universidad Nacional (Costa Rica), 2022-03-07)
La estructura de los manglares se ve afectada negativamente por diferentes factores y sus variaciones llegan a causar estrés fisiológico. El objetivo de la investigación fue describir el estado de la estructura ...
Technical and economic feasibility of adding pure oxygen for rotifer production (Brachionus plicatilis) spotted snapper (Lutjanus guttatus) larvae feeding
(Tecnológico de Costa Rica (TEC) (Costa Rica), 2016-08-30)
A study to technically and economically evaluate the addition of pure oxygen in a culture of
rotifers for feeding marine fish in the Pacific Marine Park, Puntarenas, Costa Rica was performed.
The results showed no ...
Effect of organic nitrogen and carbon mineralization on sediment organic matter accumulation in fish ponds
(Aquaculture Research, 2005-07-01)
In aquaculture, ponds with high loads of organic inputs, organic matter accumulates at the bottom over time. Uneaten feed, senescent phytoplankton and faeces are the principal sources of accumulated material, but quanti¢cations ...
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, ...
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)
Effect of the probiotic Bacillus subtilis on the growth and food utilization of tilapia (Oreochromis niloticus) and prawn (Macrobrachium rosenbergii) under laboratory conditions. Three experiments were conducted to analyze ...
Occurrence and predominance of the fish killer Cochlodinium polykrikoides on the Pacific coast of Costa Rica
(2006-07-01)
Water samples were collected at several points along the Pacific coast of Costa Rica (10°00’N, 84°15’E) fortnightly from January 2003 to June 2004. During this period, dense red-ochre discolourations dominated by Cochlodinium ...
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 ...
Extensive blooms due to Cochlodinium polykrikoides: New to Costa Rica
(Intergovernmental Oceanographic Commision, UNESCO, 2004-10-01)
At the beginning of April of 2004 an extensive bloom produced by Cochlodinium polykrikoides was detected, embracing the whole Pacific coast of Costa Rica. The bloom was characterized by a red-oxide colour and was located ...