Perfil Metabólico Durante O Periparto De Ovelhas Da Raça Santa Inês Com Gestação Simples E Múltipla

Abstract

Resumo O perfil metabólico é uma importante ferramenta no diagnóstico de doenças metabólicas e monitoramento nutricional de animais de produção. Este trabalho teve por objetivo avaliar o escore corporal e perfil metabólico de ovelhas da raça Santa Inês criadas em sistema de semiconfinamento, ao longo do periparto, comparando esses parâmetros entre animais com gestação simples e gestação múltipla. Cinquenta e cinco ovelhas (55), sendo 43 com gestação simples e 12 com gestação gemelar, foram submetidas a coletas de sangue e avaliação do escore corporal semanalmente, entre o fim do terceiro mês de gestação e um mês pós-parto, totalizando 10 avaliações. Observaram-se diferenças na comparação entre semanas para as variáveis: Glicose, BHB, NEFA, Triglicerídeos, Cálcio, Fósforo, Uréia e Creatinina para os grupos Gestação Simples (GS) e Gestação Gemelar (GG), além de Magnésio para o primeiro grupo (p<0,005). A semana do parto e as semanas subsequentes apresentaram valores estatisticamente diferentes das semanas que precederam o parto na maioria das variáveis estudadas. Não houve diferença significativa na comparação entre os grupos GS e GG para os parâmetros avaliados. Em ambos os grupos houve redução no escore corporal das fêmeas acompanhadas, com uma queda na proporção de animais com EC3 e 4 e concomitante crescimento de EC2.

Body condition score at lambing and performance of Santa Inês ewes with an offspring during lactation

“…They observed an increased hemoglobin content in ewes during the late gestation period, suggesting it was due to increased oxygen demand and higher metabolic rate during gestation. The enzyme AST is related to the metabolism of the liver, and higher concentrations may be due to insufficient feed intake (Lotfollahzadeh et al, 2016;Antunovic et al, 2011) or altered liver functions related to pregnancy toxemia (Moreira, Assis, Lima, Facury, & Borges, 2019). AST averages observed in the present study are within the normal reference values of Nasciutti et al (2012) and Santos et al (2011).…”

Subclinical hypocalcemia in primiparous lacaune ewes

“…This relationship can be explained by magnesium acting as a cofactor for parathormone in the calcium homeostasis mechanism, an essential route in peripartum (Ataollahi et al, 2020). Concentrations of this mineral are influenced by dry matter intake (Moreira et al 2019), which is lower in this phase of the pregnant ewe.…”

“…Metabolic diseases that can occur during this period are characterized by nutritional deficiencies in which the amount of nutrients ingested is not sufficient to meet production and physiological maintenance demands. In this context, pregnancy toxemia is the most studied metabolic disease in sheep farming and affects sheep in the last six weeks of pregnancy when the fetus reaches 70% of its growth (MOREIRA et al, 2019). The high energy demand for fetal formation does not keep pace with dry matter intake, characterizing a state of negative energy balance, at which point a high rate of lipolysis occurs, raising levels of beta-hydroxybutyrate (BHB) ketone bodies and non-esterified fatty acids (NEFA) (Souto et al, 2019).…”

“…However, other relevant diseases with a high potential for loss of production, such as hypocalcemia, are little studied (Cajueiro et al, 2021). According to Moreira et al (2019), hypocalcemia is a metabolic disease that can occur in sheep in clinical or subclinical form. It is characterized by calcium deficiency, when the body is unable to maintain optimal serum levels.…”

“…Another limiting factor for the action of parathormone is a low level of magnesium in the blood, as this mineral acts as a cofactor for the mechanism and, in its absence, bone tissue can become resistant to the action of the hormone, making it difficult to reabsorb calcium from the bones (Ahmed et al, 2021). Moreira et al (2019) states that magnesium concentrations are directly influenced by the diet, so an imbalance between demand and consumption of the mineral can lead to a deficit in metabolism, which is evident when the animal is in negative energy balance. Therefore, the aim of this study was to evaluate the influence of subclinical hypocalcemia in the pre-partum period on the peripartum metabolism of primiparous Lacaune ewes.…”