Continuous measuring of heat production and activity during the course of the day in hungry growing rats |
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| Authors: | L Hoffmann H Scholze |
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| Institution: | Breich Tierern?hrung Oskar Kellner, Akademie der Landwirtschaftswissenschaften der DDR, Forschungszentrum für Tierproduktion Dummerstorf-Rostock. |
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| Abstract: | Heat production (indirect calorimetry) and motor activity were measured continuously with 4 repetitions at 8 male albino rats (24 h fasting) over 21 h (4 minute cycle of measured value registration). The average difference between maximum and minimum heat production in a 4-minute measuring period amounted to 82 +/- 14% (68 to 139%). There was a significant connection between heat production and activity. 7.9 +/- 1.2% of the heat production of the hungry rat could be ascribed to activity. In the course of the day of fasting (24 h) an average metabolism reduction of 15 kJ/kg LW0.75 could be observed. |
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