ABSTRACT
The pattern of some physiological parameters (rectal temperature, respiratory rate and heart rate) and some energetic parameters (glucose, triglycerides, total cholesterol and total lipid) has been investigated with the purpose to assess the influence of shearing on thermoregulation. Thirty-six Comisana ewes were divided into two groups of 18 subjects and were allowed to two different housing systems: animals of group A were housed in an open-front barn with a paddock and animals of group B to a paddock equipped with shading net. After a period of adaptation to the experimental conditions, individual rectal temperature, respiratory and heart rates were measured. The serum concentrations of glucose, triglycerides, total cholesterol and total lipid were also assessed. All parameters were recorded, with an average interval of eleven days during 90 days, from July 15th to October 11. The statistical analysis, the ANOVA followed by the Bonferroni’s test, showed a significant effect of the time for respiratory rate, heart rate and glucose and it showed that during experimental period the type of housing system influenced glucose, triglycerides, total cholesterol and total lipid. These results confirm that different micro-environmental conditions can influence thermoregulatory mechanisms with effects on the productivity and on the welfare of ewes.
ABSTRACT
Rectal temperature, heart and respiratory rates, and the course of some blood parameters were monitored in calves during perinatal and neonatal periods. The study was carried out on eight Limousine calves. From all subjects, rectal temperature, heart rate, and respiratory rate were measured. Blood samples were taken at the same hour (9am) from the external jugular vein, and then centrifuged and stored until analyses. By means of an UV spectrophotometer, the following blood parameters were assessed for each subject: total protein, total cholesterol, triglycerides, glucose, non-esterified fatty acids (NEFA), urea, creatinine, cholinesterase, lactate dehydrogenase (LDH), hydroxybutirate, glutamate pyruvate transaminases (GPT), glutamate oxalacetate transaminases (GOT), direct and total bilirubin, magnesium, iron, potassium, phosphorus, chloride and sodium. The results showed a significant effect of days of life (P<0.05) only on total cholesterol, creatinine and GOT during the first week of life and a significant effect of days of life on rectal temperature, heart rate, respiratory rate, total cholesterol, NEFA, creatinina, and GOT during the first month of life. A correlation among individual values for postnatal age (days of life) and heart rate in calves during the first month of life was observed. In conclusion, modifications of studied parameters could be attributed to functional development of calves in neonatal period and contribute to the knowledge of adaptation processes in calf during the first week and the first month of life resulting useful for the diagnosis and treatment of any neonatal diseases.
Realizou-se o monitoramento da temperatura retal das frequências cardíaca e respiratória e de alguns parâmetros sanguíneos em oito bezerros da raça Limousine, durante o período perinatal e neonatal. Paralelamente às mensurações da temperatura retal e das frequências cardíaca e respiratória (9h), foram pesquisados, por meio de espectrofotômetro de UV, proteína total, colesterol total, triglicérides, glicose, ácidos graxos não esterificados (NEFA), ureia, creatinina, colinesterose, lactato desidrogenase (LDH), hidroxibutirato, glutamato piruvato transaminases (GOT), direta e total bilirrubina, magnésio, fósforo, cloretos e sódio. Os resultados mostraram efeito significativo dos dias de vida (P<0,05) somente sobre o colesterol total, creatinina e GOT, durante a primeira semana e um significante efeito de dias de vida sobre a temperatura retal, as frequências cardíaca e respiratória, colesterol total, NEFA, creatina e GOT durante o primeiro mês de vida. Observou-se correlação entre os valores individuais para dias de vida e frequência cardíaca durante o primeiro mês de vida. Conclui-se que as modificações desses parâmetros podem ser atribuídas ao desenvolvimento dos bezerros no período neonatal, contribuindo para o conhecimento do processo de adaptação, em bezerros, durante a primeira semana e o primeiro mês de vida.
Subject(s)
Animals , Male , Female , Infant, Newborn , Cattle , Blood Chemical Analysis/veterinary , Body Temperature , Growth and Development/physiology , Monitoring, Physiologic/veterinary , Cattle/physiology , Spectrophotometry, UltravioletABSTRACT
The aim of this study was to establish the influence of shearing in dairy sheep during summer season. Several physiological and haematological parameters, which are closely related to thermoregulatory potential, have been investigated with the purpose to assess shearing influence on thermoregulation. Forty dairy sheep, clinically healthy and well-fed, were used. They were divided into two groups of 20 subjects each. Twenty sheep were let unshorn as a control group (Group A), and twenty sheep were shorn (Group B). On each subject of group A and Group B, rectal temperature, respiration and heart rates were recorded and blood samples were collected in order to asses the following parameters: red blood cells, white blood cells, platelets, haematocrit and haemoglobin. All measurements taken on day 0 (before shearing), were repeated after 1, 15, 30, 45 and 60 days after shearing. The statistical analysis, the ANOVA followed by the Bonferroni's test, showed statistical differences between two groups for rectal temperature (F(1.90) = 5.57, p < 0.0001), respiratory rate (F(1.90) = 18.40, p < 0. 0001) and white blood cells (F(1.190) = 7.61, p < 0.0001). These results suggest that the shearing induce adaptative responses in the organism.