ABSTRACT
In cold-water ponds, cold-loving fish are cultured, primarily brown trout and rainbow trout. The biological peculiarities of trout, which is more exacting in conditions of external environment, temperature regime, and quality of water, have led to the adoption of certain unique methods for its rearing and breeding. The stripped eggs are mixed in the same container with milt collected from two or three males. The contents are moistened with water and stirred gently with a duck or hen feather. At the time of catching fingerlings the water is discharged from the ponds and fish traps installed behind the bottom outlets to facilitate catchment and grading. The daily food norm for trout fry depends on their age and the water temperature, and ranges from 2 to 12% of the body weight. The main method of intensification of trout farming is feeding under higher density of stocking than done at carp farms.
