38 FISH AND GAME. 



as careful watching. Remember always that it is the dissolved 

 oxygen in the water that the fish need. You can aerate too 

 little. You cannot aerate too much. 



Before liberating any fish a quantity of water should be put 

 into the cans from the brook, stream or pond and aerated a few 

 minutes until the temperature becomes within a few degrees of 

 being the same in the cans as in the brook. 



Trout. - - Small trout and salmon should have enough ice to 

 keep the water at the same temperature as at starting point, and 

 the water should be aerated every ten or fifteen minutes. Distri- 

 bution should be scattered over as large an area of brook as 

 possible. Trout fry should be placed in the head waters, springs 

 and small brooks; fingerlings lower down; adults in the deep 

 holes. 



While Perch. - - White perch fingerlings are cared for in much 

 the same way as trout, except that great care should be used 

 not to get the temperature below 54 degrees F., or, better still, 

 keep as near the temperature of destined pond or stream as 

 possible. Use small quantity of ice. If too cold it is likely to be 

 fatal to the fish. Liberate in deep water if possible. 



Bass. - - Bass are warm-water fish, and require very little ice 

 except on very hot days, and then only in very small quantities. 

 Keep the temperature even. Bass fry and fingerlings should be 

 liberated in the weeds along the shore if possible. Small- 

 mouthed bass are best for sandy or gravelly bottom ponds of 

 good depth, while the large-mouthed will be all right for a 

 muddy bottom and shallow water. 



Bullheads. - - Pouts are a very hardy warm-water fish. With 

 very little aeration they may be carried almost indefinitely. 

 They thrive best in muddy ponds. 



Smelt. - - Landlocked smelt ordinarily do not need ice. They 

 should be liberated on the edges of ponds with tributary 

 streams. The adults serve as food for the larger fish. 



Smelt eggs should be placed in running streams with fair 

 current and sandy bottoms. Keep cool, but do not chill. 



Pike Perch. - - Pike and yellow perch fry are very small, 

 delicate and nearly transparent. Ice should never be used. 

 They will stand high temperatures, and will thrive in ponds 

 where white perch do well. 



