The effect of high temperature on blood glucose level in two teleost fish ( Ictalurus melas and Ictalurus punctatus )

The effect of high temperature on blood glucose level in two teleost fish ( Ictalurus melas and... Black and channel catfish ( Ictalurus melas and Ictalurus punctatus ) were gradually acclimated to 36°C. Ictalurus punctatus tolerated the higher temperature better than Ictalurus melas . An intravenous glucose tolerance test was performed on Ictalurus punctatus by intravenously injecting 25 mg/100 g body weight of d -glucose. Both in the control and in acclimated fish, the blood glucose peak was reached after 1 min, after 5 min it began to decrease and after 4 hr it was drastically reduced, reaching the starting level after 24 hr. There was no significant difference between the two groups of animals until the 24th hour, where the glucose level in blood was significantly higher ( P < 0.05) in acclimated fish than in control animals. Immuno-histochemical and electron microscopy studies indicated the presence of insulin-positive beta cells with characteristic cytoplasmatic electron-dense granulations, without any apparently histomorphological difference between acclimated and control fish. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Comparative Biochemistry and Physiology Part A: Physiology Elsevier

The effect of high temperature on blood glucose level in two teleost fish ( Ictalurus melas and Ictalurus punctatus )

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Publisher
Elsevier
Copyright
Copyright © 1995 Elsevier Ltd
ISSN
0300-9629
eISSN
1879-1115
D.O.I.
10.1016/0300-9629(95)00009-V
Publisher site
See Article on Publisher Site

Abstract

Black and channel catfish ( Ictalurus melas and Ictalurus punctatus ) were gradually acclimated to 36°C. Ictalurus punctatus tolerated the higher temperature better than Ictalurus melas . An intravenous glucose tolerance test was performed on Ictalurus punctatus by intravenously injecting 25 mg/100 g body weight of d -glucose. Both in the control and in acclimated fish, the blood glucose peak was reached after 1 min, after 5 min it began to decrease and after 4 hr it was drastically reduced, reaching the starting level after 24 hr. There was no significant difference between the two groups of animals until the 24th hour, where the glucose level in blood was significantly higher ( P < 0.05) in acclimated fish than in control animals. Immuno-histochemical and electron microscopy studies indicated the presence of insulin-positive beta cells with characteristic cytoplasmatic electron-dense granulations, without any apparently histomorphological difference between acclimated and control fish.

Journal

Comparative Biochemistry and Physiology Part A: PhysiologyElsevier

Published: Jun 1, 1995

References

  • Effect of fasting on glucose turnover in a carnivorous fish ( Hoplias sp. )
    Machado, C.R.; Garofalo, M.A.R.; Roselino, J.E.S.; Kettelhut, I.C.; Migliorini, R.H.
  • Studies on oral glucose intolerance in fish
    Palmer, T.N.; Ryman, B.E.

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