250 



FISH HATCHERY MANAGEMENT 



Figure 75. In recent years, intensive culture of coolwater fishes in tanks has 

 been successful. The tanks are covered partially with black plastic to avoid dis- 

 turbing the fish. Automatic feeders provide a continuous supply of dry feed from 

 dawn to dusk at 5-minute intervals. (Courtesy Pennsylvania Fish Commission.) 



Figure 76. Walleye fingerlings are reared successfully in tanks, with automatic 

 feeders to dispense dry feed. The fish first are started feeding on live brine 

 shrimp or zooplankton and then are converted to dry feed. (Courtesy Pennsyl- 

 vania Fish Commission.) 



