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Effects of dry-matter intake and egg production on water influx in single comb White Leghorn hens

Published online by Cambridge University Press:  27 March 2009

M. Kam  and
A. A. Degen
M. Kam
Affiliation:
Isan Centre for Comparative Medicine and Desert Animal Research, Jacob Blaustein Institute for Desert Research, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
A. A. Degen
Affiliation:
Isan Centre for Comparative Medicine and Desert Animal Research, Jacob Blaustein Institute for Desert Research, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
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Summary

Water influx, i.e. total water intake from water drunk and water obtained from food, was measured using tritiated water in six groups, each containing ten single comb White Leghorn (SCWL) hens, in which each group received decreasing amounts of dry matter (D.M.) in decrements of 10%. Group 1 received 101·2 g D.M./day, an amount normally offered these hens, group 2 received 92·4 g D.M./day, group 3 received 81·0 g D.M./day, group 4 received 70·4 g D.M./day, group 5 received 61·6 g D.M./day and group 6 received 52·8 g D.M./day. In the first 4 weeks, egg production remained relatively high in the restricted fed groups compared with group 1 and body mass declined rapidly (period I); in the second 4 weeks, egg production declined to a great extent but body mass remained constant (period II). The ratio of water influx to DMI remained constant in the two periods in hens with the same DMI but with different egg production. The linear regression of DMI and/or egg production on water influx were significant within each period. DMI explained 65% of the variation in water influx, egg production explained 30/55% of the variation, and both DMI and egg production explained 66/70% of the variation. Within each period, the regressions of DMI on water influx in hens with similar egg production were generally significant, and, in contrast, the regressions of egg production on water influx within each DMI were generally not significant. It was concluded that DMI was more important than egg production in affecting water influx in laying SCWL hens.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 109 , Issue 3 , December 1987 , pp. 453 - 458
Copyright
Copyright © Cambridge University Press 1987

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References

Auckland, J. N. & Fulton, R. B. (1973). Effects of restricting the energy intake of laying hens. British Poultry Science 14, 579–588.CrossRefGoogle Scholar
Chapman, T. E. & Black, A. L. (1967). Water turnover in chickens. Poultry Science 46, 761–765.CrossRefGoogle Scholar
Chapman, T. E. & Mihai, D. (1972). Influences of sex and egg production on water turnover in chickens. Poultry Science 51, 1252–1256.CrossRefGoogle ScholarPubMed
Degen, A. A., Pinshow, B., Alkon, P. U. & Arnon, H. (1981). Tritiated water for estimating total body water and water turnover rate in birds. Journal of Applied Physiology: Respiratory, Environmental Physiology 51, 1183–1188.CrossRefGoogle ScholarPubMed
Heywang, B. W. (1941). Water consumption of hens. Poultry Science 29, 184–187.CrossRefGoogle Scholar
Jull, M. A. (1949). Water consumption in relation to egg production. World's Poultry Science Journal 5, 29.Google Scholar
Nagy, K. A. & Costa, D. P. (1980). Water flux in animals: analysis of potential errors in the tritiated water method. American Journal of Physiology: Regulatory Integrality Comparative Physiology 238, R454–R465.Google ScholarPubMed
National Research Council (1981). Effect of Environment on Nutrient Requirements of Domestic Animals. Washington, D.C.: National Academy Press.Google Scholar
Snetsinger, D. C. & Zimmerman, R. A. (1974). Limiting the energy intake of laying hens. In Energy Requirements of Poultry (ed. Morris, T. R. and Freeman, B. M.), pp. 185–199. Edinburgh: British Poultry Science Limited.Google Scholar
Sokal, R. R. & Rohlf, F. J. (1973). Introduction to Biostatistics. San Francisco: W. H. Freeman.Google Scholar
Sykes, A. H. (1972). The energy cost of egg production. In Egg Formation and Production (ed. Freeman, B. M. and Lake, P. E.), pp. 187–196. Edinburgh: British Poultry Science Limited.Google Scholar