Table XVI. 

 Mean blood chloride concentration +^ S. E. in P_. aztecus 

 during the time course of salinity-temperature adaptation. 



Control Temperature 

 Test Temperature 



18°C 

 18°C 



Control Salinity 



15°/oo 



Sampling 

 Interval 



(hour) 



Test Salinity - °/oo 



10 



15 



25 



36 



298+ 1.8 298+ 1.8 298+ 1.8 -- -- 298+ 1.8 298+ 1.8 



1 256j|^4,2 268-1^5.6 274-1^5.6 280+9.8 293^^16.4 324+6.8 



2 253+5.3 246+7.0 285^^5.3 291+3.4 314+7.6 34U9.2 

 4 237+^7.8 240+9.0 285+5.4 299^^5.8 308j|^6.0 371-|^15.1 

 6 222-1^1.5 228-1^12.9 274-1^8.0 303+6.9 309+8.6 3524^3.7 



10 193+10.8 222 + 18.0 268-1^6.3 301+8.3 310+4.5 415+8.1 



16 222+10.3 241+8.9 279+9.8 294j^3.1 313+8.3 404+4.8 



24 218-t^ 5.3 2294^9.3 279+9.6 303+8.0 305+6.2 362^^30.0 



48 242-1^5.0 252+2.2 281+4.7 296+7.8 322+3.2 392 + 13.1 



72 235+14.2 249+10.3 272+3.8 300+5.1 304+8.8 368+3.0 



96 232+4.3 248+13.1 270+5.0 301+5.1 322+5.0 383+2.8 



168 253+7.7 247-)^ 4.4 2644^6.0 315+4.0 314jt^9.4 378-|^6.2 



Avg 246+ 4.5 254+ 4.0 280+2.1 298+1.8 308+2.2 357+^5.7 



B17 



