012 4 6 



10 16 24 48 72 96 



TIME — hours 



Figure 40. Changes in the blood potassium 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 sample size was 55 shrimp. New steady- 

 state levels did not appear in most of the salinities ever in the control 



temperature 



