660 

 620 

 580 

 540 

 500 

 460 

 420 

 380 



2 340 



CO 



UJ 300 



z 



< 



-//- 



ACCL SgoC 

 TEST 25»C 





-.'//' 



.^'^ 



.^' 



I 



/ 



,^' 



36%, 



257o, 



- 1240 

 1180 

 1120 

 1060 

 1000 



940 



880 



820 



760 



700 2 



to 



640 



580 W 



CONTROU 



^ l5%o 



■JJM ~'^^ "--j 



VA 



520 

 460 

 400 

 340 

 280 

 220 

 160 

 100 

 40 



Z 



< 



12 4 6 



10 



16 



TIME— hours 



24 48 72 96 



168 



Figure 74. Comparison of blood magnesium ion levels of Penaeus aztecus 

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



were 15°/ooS and 32°C 



144 



