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Effects of an evaporative cooling system on plasma cortisol, IGF-I, and milk pr...
Titto, C.G.; Negrão, J.A.; Titto, E.A.L.; Canaes, T.S.; Titto, R.M.; Pereira, A.M.F.Access to an evaporative cooling system can increase production in dairy cows because of improved thermal comfort. This study aimed to evaluate the impact of ambient temperature on thermoregulation, plasma cortisol, insulin-like growth factor 1 (IGF-I), and productive status, and to determine the efficiency of an evaporative cooling system on physiological responses under different weather patterns. A total of ...
What Do Cattle Prefer in a Tropical Climate: Water Immersion or Artificial Shade?
Geraldo, A.C.P.M.; Pereira, A.M.F.; Titto, C.G.; Titto, E.A.L.Animal performance is affected by high air temperature and it is known that shade reduces the absorption of radiant temperature, and water for immersion facilitates heat loss. This study intends to find preferences of resources that contribute for the well-being of cattle and how they alterdaily behaviour. During summer, six Caracu and six Red Angus bulls were submitted to two different treatments: availability...
Behavior of Holstein milking cows exposed to different environmental conditioni...
Vilela, R.A.; Titto, C.G.; Titto, E.A.L.; Pereira, A.M.F.; Pereira, A.C.A.P.M.; Leme, T.M.Objectives: The aim of the study was to evaluate the behavior of dairy cows in summer in relation to the environmental conditioning system (fans with or without misting). Materials and Methods: Twenty Holstein lactating cows were allotted in free-stall pens, divided in two groups: VN ? with fans plus misting; V ? only with fans. The behavior was estimated as time standing and eating, ruminating and idling activ...
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...
Respostas fisiológicas de vacas Holandesas frente a recurso de ventilação em es...
Vilela, R. A.; Fantinato Neto, P.; Pereira, Alfredo Manuel Franco; Leme, T. M. C.; Titto, C. G.Este estudo teve como objetivo avaliar a influência do recurso de ventilação sobre a fisiologia de vacas Holandesas alojadas em free-stall, durante o verão do sudeste brasileiro. Foram utilizadas 20 vacas Holandesas submetidas a dois tratamentos: controle e ventilação. Os parâmetros ambientais registrados foram temperatura e umidade relativa do ar e temperatura de globo negro. As variáveis fisiológicas avaliada...
Influence of pre-slaughter management on cortisol level in lambs
Titto, E.A.L.; Leme, T. M. C.; Titto, C. G.; Amadeu, C. C. B.; Fantinato Neto, P.; Vilela, R. A.; Pereira, A.M.F.This study aimed to verify the influence of the transport in open or closed compartments, followed by two resting periods (1 and 3 hours) for the slaughter process on the levels of cortisol as a indicative of stress level in lambs. The slaughterhouse was located 85 km away from the place of confinement and the transportation of the lambs was carried out in a cage truck type, each cage had a divider in the middl...
Reactivity of Nellore steers in two feedlot housing systems and its relationshi...
Titto, E.A.L.; Titto, C.G.; Gatto, E.G.; Noronha, M.S.N.; Nogueira Filho, J.C.M.; Pereira, A.M.F.To evaluate reactivity to assess the temperament of Nellore steers in two feedlot housing systems (group pen or individual pen) and its relationship with plasmatic cortisol, 36 experimental units were observed five times at 28-day intervals of weight management during a 112-day feedlot confinement. A reactivity score scale ranging from 1 to 5 was applied when an animal was in the chute system. To the calmest an...
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