Physiological aspects of behaviour of sows and piglets during the lactation period
2011
Joksimović-Todorović, M., Faculty of Agriculture, Belgrade - Zemun (Serbia) | Davidović, V., Faculty of Agriculture, Belgrade - Zemun (Serbia) | Živković, B., Institute for Animal Husbandry, Belgrade - Zemun (Serbia)
Maternal ability represents complex interactions between different forms of behaviour and physiological characteristics. Behaviour and metabolic processes are partly under the control of endocrine and nervous systems. Sows are different from other mammals, in that sows bear a large number mature baby, capable immediately to suckling. Post partum anabolic processes become catabolic, giving priority to dairy gland in relation to other tissues. Maximum secretated milk takes place between the 2nd and 3rd week. Sows lost in body mass and it is appeared the change in value of some bloods parameters. Haemotologic analyses have suggested the increase in total number of leukocytes and neutrophilic granulocytes and the decrease in the number of lymphocytes, monocytes and eosinophils on the first day postpartum. In the third and fourth week of lactation a statistically significant fall in the number of leukocytes and granulocytes in relation to the first day was observed, along with a significant increase in limphocytes, monocytes and eosinophils. Erythrocyte count, haemoglobin concentration and haematocrit value decreased during the lactation period. Level of glucose in plasma is low (it is decreasing for more than 50%), while the level of urea is high, due to huge proteins available. It can also be noticed that there is a high mobilisation of body fat an increasing level of NEFA (non-esterified fatty acid). Secretion of milk is under control prolactin and oxytocin. Oxytocin affects on maternal behaviour and prolactin is linked with timing of suck.
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