Midday and nighttime cooling of broiler chickens

Journal of Applied Poultry Research

Volumn 15, Issue 1, 2006, Pages 28-39

  Segura, J C ^a   Feddes, J J R ^a   Zuidhof, M J ^b  

^a UNIVERSITY OF ALBERTA   (Canada)

^b ALBERTA AGRICULTURE AND RURAL DEVELOPMENT   (Canada)

Author keywords

Broiler chicken; Cooling; Cyclic temperature; Heat stress

Indexed keywords

AVES; GALLUS GALLUS;

EID: 33645331295     PISSN: 10566171     EISSN: None     Source Type: Journal    
DOI: 10.1093/japr/15.1.28     Document Type: Article

References (21)

1. May, J. D., B. D. Lott, and J. D. Simmons. 2000. The effect of air velocity on broiler performance and feed and water consumption. Poult. Sci. 79:1396-1400.
2. Lott, B. D. 1991. The effect of feed intake on body temperature and water consumption of male broilers during heat exposure. Poult. Sci. 70:756-759.
3. Donkoh, A. 1989. Ambient temperature: a factor affecting performance and physiological response of broiler chickens. Int. J. Biometeorolol. 33:259-265.
4. May, J. D., and B. D. Lott. 2000. The effect of environmental temperature on growth and feed conversion of broilers to 21 days of age. Poult. Sci. 79:669-671.
5. Hyink, D. 2001. Alberta Chicken Producers, Edmonton, AB, Canada. Personal communication.
6. Gerein, K. 2002. "Chickens roast to death on Camrose-area farm." Edmonton Journal, 13 July, sec. A1 and A20.
7. Canadian Council on Animal Care. 1984. Guide to the Care and Use of Experimental Animals. Vol. 2. Canadian Council on Animal Care, Ottawa, ON, Canada.
8. Hubbard L. L. C., Walpole, NH.
9. Virtual instrument program LabView, Version 5.1.1, National Instruments Inc., Austin, TX.
10. Pelouze, Model 4010CN, Signature Brands Inc., Bridgeview, IL.
11. 558 mm Exavent exhaust fan, Fancom, Panningen, the Netherlands.
12. HOBO data logger temperature sensor, Onset Computer Corporation, Bourne, MA.
13. The data were analyzed by analysis of variance using the mixed procedure of SAS [14]. Daily diurnal feed and water consumption data were analyzed as 12 periods of 2 h each. Live performance data were analyzed using individual BW data with treatment, trial (Model A), and their interactions as sources of variation (fixed effects) and 29-d BW as a covariate. Differences between means were determined using pairwise tests and are reported as significant where P < 0.05, unless otherwise indicated. Mortality was analyzed with chi-squared analysis using the CATMOD procedure [14]. Mortality data were not transformed, because transformations did not satisfy normality assumptions.
14. SAS. 2001. SAS system for elementary statistical analysis. Release 8.1. SAS Institute Inc., Cary, NC.
15. Simmons, J. D., and B. D. Lott. 1997. Heat loss from broiler chickens subject to various air speed and ambient temperatures. Appl. Eng. Agric. ASAE 13:665-669.
16. Ward, J. M., D. C. Houston, G. D. Ruxton, D. J. McCafferty, and P. Cook. 2001. Thermal resistance of chicken (Gallus domesticus) plumage: a comparison between broiler and free-range birds. Br. Poult. Sci. 42:558-563.
17. Ozkan, S., W. K. Smith, and H. M. Bath. 2002. The development of thermal resistance of the feather coat in broilers with different feathering genotypes and feeding regimes. Br. Poult. Sci. 43:472-481.
18. Walsberg, E. G., and J. R. King. 1978. The relationship of the external surface area of birds to skin surface area and body mass. J. Exp. Biol. 76:185-189.
19. Van Beek, G., and F. F. E. Beeking. 1995. A simple steady state model of the distribution of vertical temperature in broiler houses without internal air circulation. Br. Poult. Sci. 36:341-356.
20. Van Kampen, M., B. W. Mitchell, and H. S. Siegel. 1979. Thermoneutral zone of chickens as determined by measuring heat production, respiration rate, and electromyographic and electroencephalographic activity in light and dark environments and changing ambient temperatures. J. Agric. Sci. 92:219-226.
21. Emmanuel, E. J. 2001. Effect of ventilation rate, air speed and bird disturbance on the incidence of cellulitis and broiler performance. M.S. Thesis, Univ. Alberta, Edmonton, Alberta, Canada.