Abstract
The activity of glycosidases (maltase activity and amylolytic activity) in the intestinal mucosa of juvenile common carp Cyprinus carpio (L.) under a sharp increase in water temperature depends on its physiological state (satiety or starvation). The fish are acclimated to a temperature of 22°С during the summer (young-of-the-year) and winter (yearling) seasons. An increase in water temperature at a rate of 8.0°C/h leads to an increase in amylolytic activity in well-nourished fish, but the maltase activity does not change. Starving for 3 or 10 days changes the response of glycosidase to temperature stress: the maltase activity increases, but amylolytic activity does not change. Short-term starvation does not affect the thermal tolerance of juvenile common carp; i.e., the values of the critical thermal maximum in hungry and well-nourished specimens do not differ.
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ACKNOWLEDGMENTS
We are deeply grateful to V.K. Golovanov and N.S. Nekrutov for performing the water heating experiments.
Funding
This study was performed as part of State Task no. AAAA-A18-118012690102-9 and supported by Theme of the Presidium of the Russian Academy of Sciences no. 0122-2018-0001.
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Translated by D. Martynova
Abbreviations: AA—amylolytic activity; CTM—critical thermal maximum.
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Filippov, A.A., Golovanova, I.L. Short-Term Starvation Changes the Sensitivity of Intestinal Glycosidases of Juvenile Common Carp Cyprinus carpio L. to an Increase in the Water Temperature. Inland Water Biol 13, 334–337 (2020). https://doi.org/10.1134/S1995082920020170
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DOI: https://doi.org/10.1134/S1995082920020170