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3062858 
Technical Report 
Osmoregulation a gill Na, K-ATPase in the rock crab, ancer irroratus: response to DDT 
Neufeld, GJ; Pritchard, JB 
1979 
PESTAB/79/1871 
Biochem 
2 
PESTAB. Hemolymph osmotic regulation by the rock crab, Cancer irroratus, was minimal over the salinity range 310-1000 mOs/kg. There was no induction of gill Na.K-ATPase when the crabs were transferred to 50% seawater. Gill Na,K-ATPase was inhibited by both in vitro and in vivo exposure to DDT. 14C-DDT administered via the vascular system was sequestered rapidly by the hepatopancreas. Depuration proceeded slowly. The hepatopancreas metabolized the DDT primarily to DDE. Only small quantities of DDD (TDE) and polar metabolites were detected. (Author abstract by permission)