FOOD QUALITY AND FEEDING OF RAINBOW TROUT (SALMO GAIRDNERI RICHARDSON)

Hraniva za salmonide mogu biti životinjskog ili biljnog porijekla. Među životinjskim hranivima razlikuju se živa hrana, svježa hrana i suha brašnasta krmiva (životinjski koncentrati), koja se danas upotrebljavaju. Primjenom kvalitetnih koncentrisanih hraniva u ishrani kalifornijske pastrmke (Salmo gairdneri, Richardson), dobiva se jeftiniji prirast uz nizak hranidbeni koeficijent. Pod kvalitetnim koncentrisanim hranivima razume-voju se ona hranjiva koja u sebi sadrže potrebnu količinu bjelančevina od 35% do 65%, zatim uglji-kohidrate do 12% i masti najviše do 10%. U minimalnim količinama mora da sadrži vitamine i mineralne materije, svega nekoliko mg/kg tjelesne mase. Količina hrane i broj obroka mora se odrediti prema dobi riba, količini rastvorenog kiseonika u vodi i kvalitetu hrane, jer od toga znatno zavisi uspjeh hranjenja.Salmonides food can be of animal or vegetable origin. Among animal food are live organisms, fresh food and dry food (animal concentrates) used for feeding. By the use of quality concentrates in the food of rainbow trout (Salmo gairdneri, Richardson), a cheaper growth rate could be reached with a low consumption of food. The quality concentrates include the food with 35 to 65 % proteins, 12% carbohydrates and 10% fat. It must have vitamins and minerals in a small amount, some mg/kg of the body weight. The quantity of food and the number of meals (should be determined according to the age of the fishes, oxygen quantity in the water, and quality of the food, because the success of feeding depends on this