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Hematological and biochemical profiles of Mangalarga Marchador mares in the transition period bred on pasture

  • Silva, M.O.
  • Ribeiro Filho, J.D.
  • Dantas, W.M.F.
  • Valente, F.L.
  • Ribeiro, B.M.
  • Ermita, P.A.N.
  • Monteiro, L.C.
  • Costa, C.M.
  • Silva, G.M.M.
  • Alves, S.R.
  • Avanza, M.F.B.
  • Santos, P.V.M.
  • Manso Filho, H.C.
Publication Date
Dec 01, 2019
Scientific Electronic Library Online - Brazil
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ABSTRACT The present study aimed to evaluate the effects of the transition period on hematological and biochemical constituents in Mangalarga Marchador mares. Forty-eight mares were used to form a maintenance group (MG) and transition group (TG), formed by pregnant mares and, after delivery, infants. Blood samples were collected at the following times: T-60 (60 d pre-delivery), T-30 (30 d pre-delivery), T-15 (15 d pre-delivery), T0 (first 6h post-delivery), T15 (15 d post-delivery), T30 (30 d post-delivery), and T60 (60 d post-delivery). The TG had lower values (P< 0.05) of red blood cells, hematocrit and hemoglobin at T0, T15, T30 and T60 times than MG. The mean corpuscular volume was lower in MG (P< 0.05) than in TG (T0, T15, T30 and T60) and mean corpuscular hemoglobin concentration was higher (P< 0.05) in MG than in TG (T15, T30 and T60). On the other hand, the diameter distribution of red blood cells presented a lower value (P< 0.05) in MG than in TG (T15 and T30). Mares in transition period presented regenerative anemia. The results demonstrate physiological metabolic variations of different intensities during pregnancy, delivery and early lactation.

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