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Galapero J.,University of Extremadura | Fernandez S.,University of Extremadura | Perez C.J.,University of Extremadura | Garcia-Sanchez A.,CICYTEX La Orden | And 2 more authors.
Small Ruminant Research | Year: 2015

The aim of this study was to evaluate immune response function by using neutrophils phagocytic index and parameters associated to stress in order to analyse the effect of feedlot in the fattening lambs classification center (CC). Thirty six Merino lambs were randomly chosen with a live weight about 18-20 kg with 70-90 days of life. Two blood samples were taken in two moments of their period in CC, after the classification processes at the beginning of feedlot and one day before slaughter. High values compared to the reference values were found in red blood cell count (RBC) and haematocrit value, with statistically significant differences (P = 0.003, P = 0.004, respectively) between two moments. However, the increase in the neutrophil/lymphocyte ratio (N/L ratio), the decrease in phagocytosis index and high cortisol values point to stress conditions and a predisposition to develop diseases. © 2015 Elsevier B.V.

Martinez-Macipe M.,IRTA - Institute of Agricultural-Alimentary Research and Technology | Rodriguez P.,IRTA - Institute of Agricultural-Alimentary Research and Technology | Izquierdo M.,CICYTEX La Orden | Gispert M.,IRTA Food Industries | And 6 more authors.
Meat Science | Year: 2016

This study compared carcass and meat quality traits between 16 vaccinated (VF), 19 castrated (CF) and 8 entire (EF) female Iberian pigs, and between 21 vaccinated (VM) and 19 castrated (CM) male Iberian pigs reared in free ranging conditions. Vaccination consisted in the application of Improvac® at the age of 11, 12 and 14 months in VF and VM. Pigs were slaughtered at 16 months. In females, carcass and meat quality were found to be very similar regardless of the treatment. In males, VM had a leaner carcass, lower (P < 0.05) percentage of intramuscular fat, higher shear force andmore rancidity than CM(P < 0.05 in all cases). It could be concluded that vaccination or castration had no major effects on quality traits in females. It should be then stated that entire females are suitable for free-range conditions in terms of product qualities. Vaccination in females did not alter carcass and meat quality, and specific interests should consider reproductive behavior in free-range conditions. © 2015 Elsevier Ltd.

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