94 THE ANGLER AND HUNTSMAN 



CULTURE OF RAINBOW TROUT AND BROOK 

 TROUT IN PONDS: 



The U. S. Department of Commerce, Bureau of Fish- 

 eries, has furnished us the following data in regard to the 

 ciilture of Kainbow and Brook trout in ponds. This data 

 was prepared by Glen C. Leach, Assistant in charge of Di- 

 vision of Fish Culture, TJ. S. Bureau of Fisheries: 



"The information herein given has been prepared for 

 the use of persons who may be in a position to propagate 

 trout under the more or less natural conditions existing in 

 farm ponds or other waters of a somewhat similar charac- 

 ter. To this has been added a chapter on intensive pond 

 culture for the benefit of those whose operations must nec- 

 essarily be confined to a limited area. 



' ' The fact is recognized that individuals engaged in the 

 business of farming or stock raising have not the necessary 

 time to devote to intensive fish culture. At the same time 

 there are, doubtless, many who would find it possible, at 

 trifling expense, to convert into trout ponds land areas 

 which -are at present unproductive, either by the damming 

 of a ravine on the diversion of water from some neighbor- 

 ing stream into a suitable inclosure. 



Water Supply Volume, Quality and Temperature: 



"The first and most important requisite in such an un- 

 dertaking is the water supply. It should be derived from 

 springs or a spring-fed brook; it must be of suitable vol- 

 ume and temperature, and its source must be so located 

 that a constant gravity flow into the proposed pond is as- 

 sured. Ponds used for the watering of farm animals should 

 not be stocked with trout, unless the stock can be confined 

 to a certain portion of the pond by a fence, preferably near 

 the outlet, as successful results can not be expected where 

 the water is liable to become roiled or contaminated. How- 

 ever, trout ponds can safely be used as a source of supply 

 for ice. The best results may be expected if the source of 



