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In vivo and in vitro heat shock proteins gene expression in cattle.
Geraldo, A.C.A.P.M.; Oliveira, L.J.; Pereira, A.M.F.; Moreira da Silva, F.; Titto, E.A.L.The main purpose for this study was the quantification of the heat shock proteins HSPA1A and HSP90AA1, in cow lymphocytes, when subjected to heat stress directly - in vivo, or indirectly - in vitro. The aim was to identify differences between HSP expression in vitro and in vivo. The experiment was conducted in the Biometeorology and Ethology Laboratory of FZEA-USP. Were used three female Holstein Frisian, which...
Influence of season on plasmatic cortisol and IGF -I in dairy cows under therma...
Titto, E.A.L; Titto, C.G.; Negrão, J.A.; Canaes, S.T; Leme, T.M.; Vilela, R.A.; Geraldo, A.C.A.P.M.; Pereira, A.M.F.; Nogueira Filho, J.C.MObjectives: Access to evaporative cooling system can increase production in dairy cows due to improve thermal comfort. The aim of this study was to evaluate the impact of ambient temperature on thermoregulation, cortisol and IGF-I, and determine the efficiency of evaporative cooling system on the physiological responses in different weather patterns. Materials and Methods: 24 Holstein cows were housed in two gr...
Behavioral aspects of Caracu and Red Angus cattle breeds in a pasture with shad...
Geraldo, A. C. A. P. M.; Pereira, Alfredo Manuel Franco; Nogueira Filho, J.C.M.; Titto, E.A.L.The shade is an important resource in the extensive production systems in tropical regions. The aim of this study is to understand through behavioral analysis, the preferences of animals for resources for environmental protection. The experiment was conducted in the Biometeorology and Ethology Laboratory of FZEA-USP. Six male of Caracu and Red Angus cattle breeds were used. The animals were submitted to 2 diffe...
INFLUENCE OF SHADOW AVAILABILITY ON SPERMATIC MORPHOLOGY OF BRAHMAN BULLS [Bos ...
Fantinato Neto, P.; Leme, T.M.C.; Amadeu, C.C.B.; Geraldo, A.C.A.P.M; Tribucci, A.M.O.; Colussi, A.M.; Pereira, A.M.F.; Titto, E.A.L.Under heat stress conditions, testicular degeneration can occur, even on zebu animals. Therefore, the aim of this work was to verify the occurrence of any possible effect of shadow availability on pasture on spermatic morphology of Brahman Bulls on Brazil Southeast. Five animals were allocated on pasture with shadow availability, and five bulls were allocated on pasture without any kind of shadow. No difference...
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