66. 

 62. 



58. 

 54. 

 50. 

 46. 

 42. 



Id 38 



E 



i 34 



CO 



W 30 



I 26 



22 



18 



14 



10 



6 



2 



-ff- 



ACCL 25''C 

 TEST le'C 



/X 



36%, 



12 



10 



VA- 



780 

 740 

 700 

 660 

 620 

 580 

 540 

 500 



460 S. 

 420 f^ 



60 

 20 



16 24 48 



TIME -hours 



72 96 



168 



Figure 

 during 



72. Comparison of blood magnesium ion levels of Penaeus aztecus 

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



were 15°/ooS and 25°C 



142 



