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 Heat - stressed dairy cows
Poster Title: Heat - stressed dairy cows
Submitted on 01 Sep 2020
Author(s): Ahlam A El Shewy
Affiliations: Dairy Science Department, National Research Center,Cairo, Egypt.
Poster Views: 209
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Poster Information
Abstract: Heat stress can be simply defined as a condition that occurs when an animal cannot dissipate an adequate quantity of heat, whether it is produced or absorbed by the body, to maintain body thermal balance. This may cause physiological and behavioral responses, leading to physiological disorders that negatively affect the productive and reproductive performance of farm animals Summary: Nowadays,
climate change
is unequivocal
due to

1- continuous increasing in temperatures of global air and ocean

2- melting of snow and ice

3- rising global sea level
Actually, climate change term is new unlike heat stress term; however,
it has made the problem of heat stress worsen

References: Armstrong, D. V. (1994). Heat stress interaction with shade and cooling.. J. Dairy Sci. 77:2044–2050

Bernabucci, U., et al.,.( 2002b). Effects of the hot season on milk protein fractions in Holstein cows. Anim. Res. 51 (1), 25–33

Chen, K.H. et al., (1993) Effect of Protein Quality and Evaporative Cooling on Lactational Performance of Holstein Cows in Hot Weather. J Dairy Sci. 76:819-825

Das, G.K. and Khan, F.A. (2010). Summer Anoestrus in Buffalo – A Review. Reprod Dom Anim 45, e483–e494

De Rensis, F., I. et al., (2015). Seasonal heat stress: Clinical implications and hormone treatments for the fertility of dairy cows. Theriogenology 84:659–666

El- Fouly, M.M.(1983).some reproductive aspects of the Egyptian Buffalo cow. Buffalo Bulletin, vol.2, No. 3, p,4

Huhnke, R. L., et al., ( 2001). Determining the frequency and duration of elevated temperature-humidity index. ASAE Annu. Int. Mtg., Sacramento, CA. Am. Soc. Agric. Biol. E
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