Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2008.2163.2166SoleimaniA.F.KasimA.AlimonA.R.ZulkifliI.1220081117A trial was conducted to determine the influence of
short term exposure to high ambient temperature at 28 and 35 days of age
on deep body temperatures (Tb) and subsequent growth of birds until 42
days of age. A total of 90 day old chicks were reared in stainless steel
battery cages and were assigned at random into 18 pens of 5 birds each,
with 9 pens containing males and another 9 pens containing females. Three
treatment groups, each represented by 3 male and 3 female pens, were represented
by T_{1} without any heat exposure, T_{2} with heat exposure
starting at day 28 and T_{3} with heat exposure starting at day
35. Heat stress was defined as 180 min exposure to 35±1°C.
Tb and body weights were measured at 35, 37 and 39 days of age immediately
following heat exposure. Heat stress resulted in higher Tb and Onset of
heat stress at 28 days resulted in significantly lower Tb than onset of
heat stress at 35 days. Lower Tb in T_{2} than T_{3} permitted
recovery in body weight at 42 days. Sexes responded similarly to heat
stress.]]>Cooper, M.A. and K.W. Washburn,1998Dawson, W.R. and G.C. Whittow,2000De Basilio, F., Leon, A. Requena, M. Vilarino and M. Picard,2003Dozier, W.A., B.D. Lott and S.L. Branton,2005Guerreiro, E.N., P.F. Giachetto, P.E.N. Givisiez, J.A. Ferro, M.I.T. Ferro and J.E. Gabriel et al.,2004Liew, P.K., I. Zulkifli, M. Hair-Bejo, A.R. Omar and D.A. Israf,2003Lott, D.,1991May, J.D., J.W. Deaton and S.L. Branton,1987Meltzer, A.,1987SAS Institute,1996Teeter, R.G., M.O. Smith and C.J. Wiernusz,1992Van Kampen, M.,1981Wiernusz, C.J. and R.G. Teeter,1996Yahav, S. and S. Hurwitz,1996Yahav, S. and J.P. McMurtry,2001Yahav, S. and I. Plavnik,1999Yahav, S.,2001