66 



62, 



58 



54 



50, 



46. 



42. 



_l 



l^ 38. 



I 

 2 34. 



CO 



^ iO. 



o 



t 26. 



22. 

 18. 



14 . 



10. 



6. 



- 

 



- 







- 

 - 



- 

 

 - 

 • 



- 



- 



- 



 



-//- 



ACCL 25'C 

 TEST 25"C 



..//'■ 



/ 



* 



t / 



CONTROL 



- i/ I0%o /CONTRi 



. ^^'^^ l5%o 



■7> 



_i_ 





-^ 36%, 



12 4 6 



10 16 24 4 ( 



TIME — hours 



72 96 



780 

 740 

 - 700 

 660 

 620 

 580 

 540 

 500 



460 Z 



L57oo  



5 /oo 



Z'Z, 



420 



V) 



380 « 

 340 



300 

 260 

 220 

 180 

 140 

 100 

 60 

 20 



168 



Figure 70. Comparison of blood magnesium ion levels of Penaeus aztecus 

 during adaptation to various salinities at 25°C. The control conditions 



were 15°/ooS and 25°C 



140 



