Comparative Evaluation of Dairy Performance and Thermoregulatory Traits of Two Exotic Breeds of Cattle in the Hot Humid Climate of Adamawa, Nigeria
Asian Journal of Research in Animal and Veterinary Sciences,
Page 60-64
Abstract
The dynamics of heat stress has been a major challenge limiting cattle productivity in Nigeria. The overall objective of this study was to evaluate the dairy performance and thermoregulatory of two exotic cattle in hot tropical conditions of Adamawa State. Milk production traits measured were 305 day fat corrected milk yield, daily milk yield, total fat yield, total protein yield while thermoregulatory traits measured were rectal temperature, respiratory rate and skin temperature. All descriptive statistical analyses (Mean, coefficient of variation and standard error of mean) and T-test were done using R commander (2016) Software. Mean separation was done using least significant difference procedure. Milk production and efficiency traits were greatly influenced (P<0.01) by the genotypes of cows in Adamawa State, with the exception of 305FCM per cows per day protein yield, lactation length, net energy efficiency and dairy merits. Brown-Swiss had significant (P < 0.05) higher respiratory rate than Jersey cows. It is evident that considerable variation exists in milk production and thermoregulatory traits of the two exotic cows.
Keywords:
- Dairy performance
- cattle
- veterinary medicine
How to Cite
References
Rashamol VP, Sejian V, Bagath M, Krishnan G, Archana PR, Bhatta R. Physiological adaptability of livestock to heat stress: An updated review. Journal of Animal Behaviour and Biometeorology. 2018;6:62-71.
DOI: 10.31893/2318-1265jabb.v6n3p62-71
Daltro D, Dos S, Fischer V, Alfonzo EPM, Dalcin VC, Stumpf MT, Kolling GJ, Silva MVGB da, McManus C. Infrared thermography as a method for evaluating the heat tolerance in dairy cows. Revista Brasileira de Zootecnia. 2017;46:374- 383.
DOI: 10.1590/s1806-92902017000500002
Climate-Data: Climate-Data.org; 2015.
Available:http://en.climate-data.org/location/402824
(Accesses on 12, 2015)
Richardson, H.G. Standard methods for the examination of dairy products. 6th edition, American public health association, Washington, DC. 1985;133-150.
A.O.A.C. Association of Official and Analytical Chemists. 15th Edition William Press, Richard Virginia, U.S.A; 1990.
R Development Core Team. A language and environment for statistical computing.R Foundation for Statistical Computing, Vienna, Austria; 2016.
Lee JK, VanRaden PM, Norman HD, Wiggans GR and Meinert TR. () Relationship of yield during early lactation and days open during current lactation with 305 d yield. J. Dairy Sci. 1997;80:771-776.
Finch VA. Body temperature in beef cattle: Its control and relevance to production in the tropics. Journal of Animal Science. 1986;62:531–542.
Berman A, Folman Y, Kaim M, Mamen M, Herz Z, Wolfenson D, Arieli A, Graber Y. Upper critical temperatures and forced ventilation effects for high-yielding dairy cows in a subtropical climate. Journal of Dairy Science. 1985;68:1488–1495.
DOI: 10.3168/jds.S0022-0302(85)80987-5
Hammami H, Rekik B, Soyeurt H, Bastin, C, Stoll J and Gengler N. Genotype × Environment interaction for milk yield in Holsteins using Luxembourg and Tunisian populations. Journal of Dairy Science. 2009;91:3661-3671.
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