TOP VIEW 



-26cm>( 



Refuge for young fish 

 (duplicated in eoch tank) e 



SIDE VIEW 



o o^oo 



-40-w. fluorescent tubes- 



278 cm - 

 278 cm ■ 



"40-W. fluorescent tubes 



■ 279 cm 



6cm [gppr ) 



y i 



Figure 1. — General arrangement of tanks and orientation with respect to light fixtures. Door 

 to room was located beyond end of light fixture in upper right corner, and was not visible 

 to fish in tanks. 



FOOD LEVEL AXD EXPLOITATION IN FISH POPULATIONS 



427 



