FASTING CONFINEMENT EFFECTS ON SHARKS 



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Figure 2 Alterations in the histological appearance of the interrenal glands of captive 

 Squalus acanthias. (a) Parenchyma of the normal gland (formalin fixed, 

 glycol-methacrylate embedding, 4 pm); hematoxylin and eosin, X 125. (b) Interrenal from 

 a shark sacrificed after 14 days in captivity (processed as in 2a); hematoxylin and eosin, 

 X 125. (c) Interrenal from an animal sacrificed after 18 days in captivity (processed as in 

 2a); hematoxylin and eosin X 125. (d) Interrenal from an animal sacrificed when 

 immobile, after 9 days of captivity (processed as in 2a); hematoxylin and eosin, X 125. (e) 

 Interrenal from a shark that died in the pen after 18 days in captivity (formalin fixed, 

 para-plast embedding, 4 /Lim) X 125. 



