TEOUT PONDS 103 



6 feet wide, and of a depth to allow from 18 

 inches to two feet of water. A pond for year- 

 lings and two-year-olds, may he about 40 to 50 

 feet long, 14 wide, and about three feet in depth. 

 One for older fish might be from 50 to 100 feet 

 long, from 15 to 20 feet wide, and about 4 feet 

 deep, excepting in the circumstances stated 

 later in this chapter. Where it is not desired 

 to rear trout beyond the age of two years, the 

 largest pond mentioned would be used for the 

 oldest fish, and the second size for fish from six 

 or eight months to one year old. Livingston 

 Stone, a well-known authority on trout-culture, 

 advised with sound sense that the smaller the 

 water-supply the smaller should be the ponds. 

 "If," says he, "your water-supply is small and 

 liable to heat up, make the pond narrow and 

 deep, — a deep ditch." 



Where the trout-breeding establishment is 

 for commercial purposes exclusively it is well 

 to have one or more ponds half an acre or so 

 in extent, sloping to a depth of eight to ten 

 feet at the lower end. Such a pond will hold an 

 almost incredible number of fish, and require 

 less attention than smaller ponds. 



