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The adaptation of digestive enzymes to temperature, season and diet in roach Rutilus rutilus L. and rudd Scardinius erythrophthalmus L. Cellulase
Author(s) -
Niederholzer R.,
Hofer R.
Publication year - 1979
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1979.tb03624.x
Subject(s) - rutilus , biology , omnivore , detritus , cellulase , digestive enzyme , zoology , digestion (alchemy) , digestive tract , adaptation (eye) , fish <actinopterygii> , zooplankton , ecology , enzyme , fishery , lipase , predation , biochemistry , medicine , chemistry , chromatography , neuroscience
The cellulolytic activity of the contents of the intestinal tract of populations of roach and rudd in four Tyrolean lakes was studied. Much of the activity was taken up with the diet. In fish feeding on plants and detritus a lower cellulolytic activity was found than in fish feeding on zooplankton or on arthropods. A seasonal pattern of cellulolytic activity was demonstrated with a peak in the autumn. It is assumed that the cellulolytic activity found in the intestinal contents of cyprinids is insufficient for the digestion of fibre, but that is suffices—particularly in omnivorous species—to support the breakdown of cell walls.