30.0 

 28.0 

 26.0 

 24 .0 

 22.0 

 20.0 

 18.0 

 16.0 

 14.0 



^:^^^-----I2^Z3fe^^it^C ^ 



I07oo 



90 

 80 

 70 



10 16 



TIME-hours 



24 48 72 96 



Figure 69. Comparison of blood calcium ion levels of Penaeus aztecus 

 during adaptation to various salinities at 18°C (section A of the fig- 

 ure), 25°C (B), and 32°C (C) . Control conditions were 15°/ooS and 18°C 



138 



