E 



O 



E 

 I 



o 



w 

 o 



- 140 



135 



130 



- 125 



- 120 



115 



110 



105 < 

 _l 

 O 



irt 

 O 



100 



95 



90 



- 75 



70 



12 



10 16 24 



TIME — hours 



48 72 96 



168 



Figure 57. Comparison of the blood osmotic levels of Penaeus aztecus 

 during adaptation to various salinities at 32°C. The control conditions 



were 15°/ooS and 18°C 



123 



