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THE DIGESTIVE SYSTEM OF VERTEBRATES

FISH: Shark

Basking shark (photo by Dan Gotshall)   (from CD Chapter 2)



Leopard shark (photo by Dan Gotshall)    (from CD Chapter 2)


Table 8.9.  ((from CD Chapter 8)

Enzyme activities expressed as the equivalent amount of bovine trypsin (casein or BAEE) or chymotrypsin (BTEE) under the same conditions. ^a measurements of enzyme activity in the pyloric cecal tissue may account for the lower values, ^b frogs were fed, ^c frogs fasted at 5 C, * group C: 0-20 µg RNase per gram of pancreatic tissue. (from Vonk and Western 1984)



Figure 10.2.  Osmotic regulation in a typical elasmobranch, the dogfish shark (Squalus acanthias). Values for NaCl, Na+, Cl- and urea are given in mM or mEq per liter.  Osmotic pressures (OP) of sea water (SW), body fluids and  urine are given in mOsmoles per liter. (Modified from Kormanik 1992)  (from CD Chapter 10)