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Relationship of Plasma Nonesterified Fatty Acids and Walking Activity in Postpartum Dairy Cows

A. A. Adewuyi^*, J. B. Roelofs, E. Gruys^*, M. J. M. Toussaint^* and F. J. C. M. van Eerdenburg^,1

^* Department of Pathobiology, Faculty of Veterinary Medicine, Yalelaan 1, 3508 TD, Utrecht, the Netherlands
Adaptation Physiology, Department of Animal Sciences, Wageningen University, P.O. Box 338, 6700 AH Wageningen, the Netherlands
Department of Farm Animal Health, Faculty of Veterinary Medicine, Yalelaan 7, 3508 TD, Utrecht, the Netherlands

¹ Corresponding author: F.J.C.M.vanEerdenburg{at}vet.uu.nl

To survive and produce milk, postpartum dairy cows use their reserves through lipolysis. If the negative energy balance is severe, nonesterified fatty acids (NEFA) are formed that can impair several physiological processes. A pilot study suggested that increased walking activity after calving may be related to a reduced serum concentration of NEFA. The objective of this study was to determine the relationship between plasma concentrations of NEFA and walking activity in dairy cattle during the postpartum period. Data were collected from 33 multiparous Holstein-Friesian dairy cows. Walking activities were quantified using pedometry, and blood samples were collected for determination of NEFA. Results of this study indicated that a negative relationship existed between walking activity and plasma NEFA concentrations in postpartum dairy cows.

Key Words: postpartum • walking activity • energy balance • lipolysis

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