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Abstract
Nakamura, Y.-N., Orito, H., Tsuneishi, E., Hirano, K., Kato, N., Shoji, A., Kamiya, M. and Nakanishi, Y. 2008. Changes in plasma composition of Japanese black steers during grazing and fattening periods. J. Appl. Anim. Res., 34: 157–161.
The plasma compositions of five Japanese black steers during about 23 months of grazing and fattening period of about 6 months were investigated. Plasma A/G, LDH, Glu, tCho and Ins concentrations increased (P<0.05), whereas TG, UNandNEFA concentrations decreased (P<0.05) during the fattening period. Plasma Na concentration increased (P<0.05) during the fattening period. Plasma Bβ-carotene and tocopherol concentrations decreased (P<0.05) during the fattening period. Changes in plasma chemical composition during grazing and fattening were related to the chemical composition of the feed consumed and lack of exercise during housing.