The hatching period depends on the temperature of the water. The fish culturist prefers water of from 45 to 50 degrees F. in which the fish hatch in from 45 to 60 days, but in a natural state the hatching usually takes closer to 100 days; sometimes as long as 220 days.
Growth of the fry is governed somewhat by the amount of available food and the water conditions. Ordinarily a trout weighs an ounce or less during the first year after which the growth is more rapid; a two year old fish weighs eight to ten ounces and a pound trout is usually three years old.
In waters that are much fished, especially small
