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Recruitment and communication of food source location in three species of stingless bees (Hymenoptera, Apidae, Meliponini)
(Universidad Nacional (Costa Rica), 2005-06-01)
This study reports on controlled experiments of the recruitment behavior and location
communication in three species of stingless bee Trigona corvina, Plebeia tica and Trigona (Tetragonisca)
angustula. We trained bees ...
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 ...
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, ...