66.0 

 62.0 

 58.0 

 54.0 

 50.0 

 46.0 



42.0 



_l 



S 38.0 



E 



I 

 2 34.0 



UJ 30.0 



z 



§ 26.0 



-y/- 



ACCL 32X 

 TEST I8''C 



/A' 



-V/ 



56%o 



._ 25% o: 



5 /oo 

 J 1 I I L. 



-//- 



1240 

 1180 

 1120 

 1060 

 1000 



940 



880 



820 



760 



700 2 



64 ''' 



580 O 

 < 



520 ^ 



460 

 400 

 340 

 280 

 220 

 160 

 100 

 40 



16 24 48 72 96 



TIME -hours 



168 



Figure 75. Comparison of blood magnesium levels of Penaeus aztecus dur- 

 ing adaptation to various salinities at 18°C. The control conditions 



were 15°/ooS and 32°C 



146 



