Ui 



E 



S 

 2 

 (/) 

 IJ 



2 

 O 



< 



100 

 80 

 60 



012 4 



24 48 72 96 



12 4 



72 96 



TIME -hours 



TIME -hours 



Figure 31. Changes in the blood magnesium levels of Penaeus 

 aztecus in the process of salinity adaptation at 25°C"! The 

 control conditions were 15°/ooS and 25°C and the control sam- 

 ple size was 54 shrimp 



92 



