Body Fluids 



113 



SALINITY OF CRAB BLOOD 



The depression of the freezing point of blood (A) 

 indicates the amount of salt present. Salinity decreases as 

 crabs live away from sea. 



Tortugas, Florida °C 



Misaki, Japan 



Gecarcinus 

 lateralis 



Cardisoma 

 guanhumi 



Ocypode 

 albicans 



Grapsus 

 grapsus 



Mithrax 

 verrucosus 



-1.65 

 -1.66 

 -1.70 

 -1.92 

 -2.07 





A\ 



cs 

 in 



Sesarma 

 haematocheir -1.43 



Sesarma 

 pictum —2.17 



Hemigrapsus 

 sanguineus —2.19 



Pachygrapsus 

 crassipes -2.24 



Pugettia 

 quadridens -2.27 



Coenobita 

 clypeatus 



Petrochirus 

 bahamensis 



Panulirus 

 argus 



Sea Water 



2.09 



2.09 



2.20 

 2.04 





53 



173 



Sea Water 



-2.09 



Fig. 18. 



