Table XXXVIII. 

 Mean blood magnesium concentration ^S. E. in P^. aztecus 

 during the time course of salinity-temperature adaptation. 



Control Temperature 



Test Temperature 32°C 



5°C Control Salinity 15 /oo 



Sampling Test Salinity - °/oc 

 Interval — 



(hour) 2 5 10 15 25 36 



8.2 + 0.3 8.2-|_0.5 8.2 + 0.5 8,2+0.3 8.2+0.3 8.2 + 0.3 



1 14.7+1.1 9.9+0.7 8.1 + 1.1 11.4 + 1.2 12.8+0.6 17.9+^1.2 



2 9.8+^0.7 6.6+^0.6 6.5 + 0.6 9.4+^0.9 13.6+^1.1 24.5 + 3.0 

 4 3.6+0.6 4.7 + 0.1 5.6j+1.4 7.1+0.5 16.2 + 1.0 27.5ji^3.8 

 6 2.8+^0.2 5.2+0.3 6.6 + 0.8 8.3+0.6 16.1ji^l.8 32.7 + 1.3 



10 5.1+0.6 6.3+0.6 6.3+^0.2 9.6+0.9 18.3 + 1.4 30.2 + 2.5 



16 4.6 + 0.6 6.2+0.1 6.9+0.4 9.1+^0.5 27.6+^4.8 50.1+4.9 



24 3.6 + 0.3 6.0+0.5 6.3+0.6 7.9 + 0.9 25.7 + 2.8 50.0+^4.3 



48 3.0+^0.7 6.0+0.6 6.4+_0.6 8.6+^0.3 19.6+2.8 52.6+3.8 



72 2.8+1.1 5.1+0.8 5.4+1.0 7.8+0.6 24.8+2.2 48.4+6.7 



96 3.1 + 0.2 6.2+_0.5 4.9+^0.7 8.7+0.9 14.3+1.2 42.0+^9.4 



168 3.7+0.8 7.2+0.2 4.1+0.4 5.2+1.0 15.4+1.8 61.2+2.6 



Avg 5.4+0.5 6.6+^0.2 6.3+^0.2 8.4_+0.3 16.8+0.9 34.6 + 2.3 



B39 



