Encontrados 16 documentos, a visualizar página 1 de 2
Alterações histológicas dos rins e expressão das metalotioneínas e das proteína...
Paiva, F.; Fialho, L.; Cabrita, A.S.; Pereira, A.M.F; Capela e Silva, F.The histological alterations and the expression of metallothionein (MTs) and heat shock protein (Hsp70) in the kidney of Wistar rats after thiram fungicide exposure were evaluated. Animals were distributed into three groups: standard diet group, standard diet + corn oil group and thiram group. Significant differences were found (P<0,05) in the evolution of body weight between rats in the thiram group and those ...
Physical characteristics of the eggs of red-legged partridge (Alectoris rufa) r...
Ribeiro, S.; Pereira, A.M.F.; Capela e Silva, F.; Ferraz de Oliveira, M.I.The objective of the present study was to evaluate the effects of female age (1, 2 and 3-year-old) and month of laying (March, April and May) on the physical characteristics of the red-legged partridge eggs reared in captivity. O objetivo do presente estudo foi avaliar os efeitos da idade das fêmeas (um, dois e três anos) e do mês de postura (março, abril e maio) sobre as características físic...
Influence of stocking density on weight and behavior of feedlot lambs
Leme, T.M.; Titto, E.A.L.; Neto, M.C.; Pereira, A.M.F.The aim of this study was to verify the influence of the animal density on the weight gain and behavior of confined lambs. 86 animals were confined after weaning in 23 pens of two lambs each (double pens) and four pens of ten animals each (collective pens). During the 80 days of confinement all lambs received the same diet and the animals were weighed at the beginning of the trial and every 14 days for the cont...
Influence of availability of shade on testicular characteristics of Santa Ines ...
Teooro, S.M.; Pereira, A.M.F.; Gusmão Filho, J.D.; Silva, J.N.The purpose of this study was to evaluate the effects of availability of artificial shading on testicular and seminal characteristics of Santa Ines crossbred rams. Twelve 8 month old rams at 38.1 ± 5.2 kg average weight, were used in a total random design with two treatments: areas with and without available artificial shading (black polyethylene mesh screen for a 50% reduction of solar radiation). The scrotal ...
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 ...
Respostas fisiológicas e comportamentais de vacas Holandesas mantidas em sistem...
Vilela, R.A.; Leme, T.M.; Neto, P.F.; Balieiro, J.C.C.; Titto, E.A.L.; Pereira, A.M.F.Este estudo teve como objetivo avaliar a influência de recursos de climatização, ventilação e nebulização, sobre a fisiologia e o comportamento de vacas Holandesas alojadas em free-stall, durante o verão do sudeste brasileiro. Foram utilizadas 20 vacas Holandesas submetidas a dois tratamentos com e sem climatização. Os parâmetros ambientais registrados foram temperatura de bulbo seco, umidade relativa do ar e t...
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...
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...
Assessing heat tolerance of Alentejana and Mertolenga portuguese cattle breeds ...
Pereira, A.M.F.; Titto, E.A.L.; Baccari Jr., F.; Almeida, J.A.A.Abstract Objectives: During summer in Mediterranean regions, well adapted native cattle breeds present differences in environmental tolerance. The objective of this study was to compare heat tolerance of Alentejana and Mertolenga heifers under direct solar radiation, by quantifying the pathways of evaporative thermolysis and thermostability. Materials and Methods: The experiment was carried out in 5 days. 6 Ale...
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...
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