Broodstock and hatcheries
One problem for Peruvian trout farmers is the lack of eggs from national hatcheries. All eggs must be imported from countries like United States, Canada, Spain and Denmark in technopor conditioned layered boxes at 4ºC. From there, on-land incubators grow the eggs to fingerlings of about 4-6 centimeters. Some importers sell their fingerlings to smaller and medium scale farmers. The fingerlings are transported (by land to ponds or by boat to cages) to the grow-out ponds/cages. Survival rate from egg to a 300-350 gr WR trout is about 70%.
The bigger feed mills in Peru have stores in all important farming areas. Companies like Aquatech, Purina and Nicovita can supply feed within one day. The pellets normally contain fish meal, grains and some (permitted) additives. One legal additive is responsible for the color of the meat of the fish. The demand of the customer decides which feed to use: cheaper feed for white meat (for export to Russia for example) or more expensive feed for dark pink meat (for export to United States for example). Until 2-3 months before harvesting, the farmer can adjust the color of the meat (according to the Roche Color Cart). The farmers don’t use chemicals nor biotics but medicines are an eventual input to strike skin allergy.