The relationship between the digestive enzymes in arctic char,Salvelinus alpinus (Salmonidae,Osteichthyes) and its ability to survive in extreme environments |
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Authors: | Gerhard Reimer |
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Institution: | 1. Zoologisches Institut der Universit?t Wien, Althanstra?e 14, A-1090, Wien, Austria
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Abstract: | Digestive enzymes of chars from seven Austrian lakes have been studied. Trypsin activity ml−1 fluid is proportional to body size but inversely proportional to the amount of food in the digestive tract. The pancreas
appears to secrete trypsin ± continuously and the activity measureable in the intestinal fluid seems to depend largely on
the gut passage rate. There is no seasonal rhythm of enzyme activity. Amylase activity is very weak. Pepsin activity seems
to depend mostly on the dilution of the gastric juice. The results indicate that the steering mechanisms of digestive enzymes
in salmonidae are well distinct from other families.
This work was part of a PH. D. thesis (Reimer, 1984).
This work was part of a PH. D. thesis (Reimer, 1984). |
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Keywords: | Salvelinus alpinus Salmonidae trypsin digestion |
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