Effect of temperature on proteinase activities in intestinal chyme and mucosa of fish of different ecological groups |
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Authors: | V V Kuz’mina E G Skvortsova M V Shalygin |
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Institution: | (1) Papanin Institute of Biology of Inland Waters, Russian Academy of Sciences, Borok, Yaroslavl’ oblast’, Russia |
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Abstract: | Effect of temperature on activities of proteinases in intestinal chyme and mucosa was studied in three fish species (pike-perch, zope, roach) belonging to different ecological groups by their nutrition type. There was revealed a significant difference of dependence of enzyme activities in chyme on temperature in the benthophage, roach (a higher level of relative activity in the range of lower temperatures and a wider zone of temperature optimum) as well as of values of apparent energy of activation of the protein hydrolysis process as compared with that in planktoand ichtyophages, zope and pike-perch, which indicates a significant effect of the enteral microbiota proteinases and of nutrition objects on characteristics of hydrolases functioning in fish intestine. |
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Keywords: | fish chime intestinal mucosa proteinases temperature dependence |
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