94 



FISH HATCHERY MANAGEMENT 



FERTILIZATION PROCEDURES 



Fertilization promotes fish production by increasing the quantity and qual- 

 ity of food organisms. Bacteria are important in the release or recycling of 

 nutrients from fertilizers. Once in solution, nutrients stimulate growth and 

 reproduction of algae which, in turn, support populations of zooplankton. 



PIPE CLAMPS 



SUPPLY LINE 



SOCK FILTER, 

 WATER SURFACE 



LEVEE 



SARAN SOCK ATTACHED TO THE WATER LINE 



Figure 37. Sock- type filters with saran screen for pond 

 inflows. (Diagram from Arkansas Game and Fish Commis- 

 sion; photo courtesy of Fish Farming Experimental Station, 

 Stuttgart, Arkansas.) 



