CAT-FISH CULTUKE 69 



the greater depth of the shelf is advised. The 

 shelf, a shoal part, had better comprise the 

 greater part of the pond, as it gives a larger 

 spawning-surface. The kettle naturally will be 

 located at the outlet end. Arrangements for 

 the inflow and outflow are the same as for bass 

 or any other warm- water fish-ponds that is, 

 provide an inflow pipe, and for the outflow con- 

 crete gate-frames with splash-boards and 

 screens. About the same amount of water is 

 ordinarily used as for black bass, although cat- 

 fish can get along on a smaller supply. Too 

 little water breeds the dangerous fungus. 



