BULLETIN or THE UNITED STATES FISH COMMISSION. 3 03 



96.-DESCRIPTION OF CAKP rOIVDS AND ^VATEB OATE. 



By JULIUS OROSS. 



Carp Ponds. — Pond No. 1 is u spawuiug poud, 150 by 17q feet. This 

 slopes from 1 inch to 8 feet in depth, and is supplied with spring water, 

 which is brought about 1,200 feet in tile pipes. 



Pond Ko. 2 is a little hatching pond, 40 by 50 feet, which slopes from 

 1 inch to 3 feet in depth, and receives its water from Ko. 1, while its 

 outflow empties into No. 3. 



Pond No. 3 is a raising or stock pond, 200 by 300 feet, sloping from 

 6 inches to 8 feet, and supplied with water from a creek. 



N'7. Spaxftdng Tcnd^ 

 \A ?50 '.775 '.Xlqiih rio3'. 







I have found that the best way of transferring the eggs from No. 1 to 

 No. 2 is by putting live cedar brush into the spawning pond, and after 

 tlJfe eggs are deposited they can easily be removed to the hatching pond. 



When the ponds are to be drained, all three empty into a creek which 

 flows near by, and is several feet lower than the ponds. When No. 1 is 

 drained to take out the young fish, the old ones are put into No. 2, where 

 thej^ remain until all necessary repairs have been made. No. 1 is then 

 filled to half its depth with back-water from No. 3, a fine strainer being 

 kept in the inflow to prevent intruders from coming in with the back- 

 water, while the spring fills the remainder of the pond. The spawning- 

 fish are then replaced in No. 1. 



Water Gate. — At the outflow of a carp pond there is apt to be some 

 trouble, caused by leakage or by muskrats or crawfish making holes in the 



