The source and the

manufacturing process of tilapia feed sold in the country and

registered in the Quality Control Program for Animal Feed of

the Ministry of Agriculture and Livestock of Costa Rica and

the prescriptions according to the physiological stage, chemical

compositions and the relations crude protein : metabolizable

energy and calcium : phosphorus, were evaluated and

compared to nutritional requirements. The physical quality

was evaluated in terms of particle size of the pellets against

the size of fish. The market study compared the selling price

per nutrient unit in each formula, with respect to its contents.

It was determined that 82.35% of the formulas were manufactured

in Costa Rica, 82.23% were extruded feed and 41%

of the formulas are recommended for all types of tilapia fish,

which resulted in inconsistencies with respect to the requirements.

However, all crude protein levels in different fingerlings

formulas complied with requirements. With respect to

physical quality the situation is more critical, since only

23.53% of the registers indicated the size of the pellet. Only

5 out of the 17 registered formulas are being marketed, reason

enough to conclude that comparing formulas on their selling

price per nutrient unit, is not a good criteria for selecting

a particular formula.