Pentair Aquatic Eco-Systems in Guyana
Aquaculture in Guyana is a relatively new concept, however, due to declines in marine capture fisheries, the interest in aquaculture is steadily increasing. The main culture species of the country include Nile tilapia, (Oreochromis niloticus), Mozambique tilapia (Oreochromis mossambicus), Jamaican red tilapia, (hybrid), giant river prawn (Macobrachium rosenbergii), armored catfish or atipa (Hoplosternum littorale), and salmon shrimp (Mesopenaeus tropicalis).
The majority of cultured animals are freshwater species. Tilapia is currently only practiced in earthen ponds ranging from 40 m2 to 2000 m2, with stocking ranges starting at 2300/m2 but often exceeding that. Typical feeds used are rice bran, wheat bran, chicken starter, and some farmers use a floating tilapia grower feed. The giant river prawn is still in its trial phases, but they are currently being grown in earthen ponds from 80 m2 and up, and stocking at five postlarvae/m2. The seed stock is still imported from the United States of America, at present. Feeds used are locally produced chicken starter feed, and sinking grower tilapia pellets. Armored catfish or atipa are grown in earthen ponds ranging from 40 m2 to 1200 m2, and a stocking density of 4600/m2. Rice bran is the main feed used along with cow manure with feeding rates as high as 453 kg/m2.
There are some brackishwater species cultured that operate as extensive polyculture systems, as well, and include salmon shrimp, common snook (Centropomus undecimalis), tarpon (Megalops atlanticus), and mullet (Mugil spp.).