CULTURE OF YELLOW PEECH 189 



impregnation is not as satisfactory in results 

 as raising eggs naturally deposited and fer- 

 tilised. Ordinarily a larger percentage of eggs 

 can be fertilised by artificial impregnation than 

 by natural, but this has not proven so in this 

 case. 



Care of the Fish. — ^Yellow perch can be re- 

 tained and cared for in hatchery-ponds as easily 

 and numerously as brook-trout. For food they 

 take very kindly to cut lungs and liver, and will 

 not even disdain bread. They require less 

 artificial food than trout because there is for 

 thena a wider range of natural food. While 

 yellow perch may be retained successfully in 

 ponds of almost any size, they thrive better in 

 those of large area, and should have ponds as 

 large as those provided for the black bass. 



It is no trouble whatever to induce yellow 

 perch to take artificial food during the spring, 

 summer and early autumn ; but after they have 

 gone into the kettle in the late autumn it is not 

 so easy to feed them successfully. Yet they 

 must be induced to eat it, because hatchery- 

 ponds contain a minimum amount of natural 

 food, and otherwise on the arrival of spring 



