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Alexandrium monilatum (Howell) Balech bloom in the Gulf of Nicoya, Puntarenas
(The Intergovernmental Oceanographic Commission of UNESCO (Francia), 2005-12)
The Gulf of Nicoya, an estuary on
the pacific coast of Costa Rica, extends
80 Km, from the Tempisque River to
the Pacific, with a maximum width of
50 Km at the mouth, and an area of 1550
Km2. Hydrography of the Gulf ...
Variación mensual del índice de gonadosomatico de Colossoma macropomum relacionado a factores ambientales en Cañas, Costa Rica
(Universidad Nacional (Costa Rica), 2000)
Con el fin de determinar la variación mensual en el índice gonadosomático de Colossoma macropomum en estanques, se tomaron muestras mensuales de 10 individuos desde setiembre de 1993 hasta setiembre de 1994. Se midieron ...
Cooling, cryoprotectant and hypersaline sensitivity of penaeid shrimp embryos and nauplius larvae
(Elsevier, 2001-10-23)
The sensitivity of embryos of the penaeid shrimp, Trachypenaeus byrdi, to cooling, cryoprotec tant exposure dimethyl sulfoxide : DMSO, sucrose, methanol and glycerol , and hypersaline Ž .
treatment was assessed in order ...
Growth of Oreochromis aureus fed with diets containing graded levels of coffee pulp and reared in two culture systems
(Aquaculture vol.217 no.1-4 275-283 2003, 2003)
A study was conducted to compare growth and feed utilization of Oreochromis aureus fed graded
levels of coffee pulp (CoP) and reared in aquaria or in pens. Diets contained 0, 130, 260 and 390 g
kg 1 of oven-dried CoP. ...
Induction of sperm activation in open and closed thelycum penaeoid shrimps
(Aquaculture vol.216 no.1-4 371-381 2003, 2003)
A modified egg water (EW) technique for in vitro induction of sperm activation was applied to Trachypenaeus byrdi, Xiphopenaeus riveti (closed thelycum shrimps), and Litopenaeus occidentalis (open thelycum) from a tropical ...
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 ...