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Effects of temperature and diet on the water and energy metabolism of growing rabbits

Published online by Cambridge University Press:  27 March 2009

L. M. Jin
Affiliation:
Department of Biochemistry, Microbiology and Nutrition, University of New England, Armidale, NSW 2351, Australia
E. Thomson
Affiliation:
Department of Biochemistry, Microbiology and Nutrition, University of New England, Armidale, NSW 2351, Australia
D. J. Farrell
Affiliation:
Department of Biochemistry, Microbiology and Nutrition, University of New England, Armidale, NSW 2351, Australia

Summary

Water and energy metabolism were measured in six growing female New Zealand White rabbits placed individually in metabolism cages within chambers at 20 or 30 °C and offered a diet high (H) or low (L) in roughage. For water balance measurements, feed intake was higher at 20 °C than at 30 °C; mean water balance of rabbits on diet L was 7 g/day at 20 °C and 36 g/day at 30 °C. Total daily water consumption was 84–96 g/kg body weight (W), and the ratio of free water to feed intake was 1·6:1 at 20 °C and 2·3:1 at 30 °C.

Calorimetric measurements showed no differences in energy metabolism of rabbits due to diet or temperature. Metabolizable energy needed for maintenance was 357 kJ/kg W0·75 per day and was used with an efficiency of 0·44 for weight gain.

Type
Animals
Copyright
Copyright © Cambridge University Press 1990

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