FISHERY BULLETIN: VOL. 87. NO. 1 



Figure 1.— The effect of temperature on egg and yolk-sac 

 stage duration of white perch. Plotted values are means ± 2 

 SE. 



125 



100 



75 



o 

 in 



^ 50 



25 



De ^ 686.9906"°^'*°^"'" (r2.0.99) 

 where Dg = time in hours 



T = temperature (°C) 



■'■•i 



13 17 



Temperature (°C) 



21 



60 



- 50 



40^ 



o 30 



~ 20 



10 



13 "C 



17 



21 ^C 



2 3 4 

 Group 



Figure 2.— Mean expected survival of white perch larvae after eight days of 

 feeding. Error bars are ±2 SE. 



66 



