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Volume 51, issue 3
Arch. Anim. Breed., 51, 255–265, 2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.
Arch. Anim. Breed., 51, 255–265, 2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.

  10 Oct 2008

10 Oct 2008

Changes in selected physicochemical parameters of breast muscles of geese from Polish conservation flocks depending on duration of the post slaughter period

A. Okruszek1, J. Książkiewicz2, J. Wołoszyn1, G. Haraf1, A. Orkusz1, and G. Szukalski3 A. Okruszek et al.
  • 1Wroclaw University of Economics, Department of Animal Food Technology, Wrocław, Poland
  • 2National Research Institute of Animal Production, Department of Farm Animal Genetic Resources Conservation, Balice n. Kraków, Poland
  • 3National Research Institute of Animal Production, Station of Waterfowl Genetic Resources, Dworzyska n. Kórnik, Poland

Abstract. In four Polish conservative flocks of Suwałki (Su), Kartuzy (Ka), Kielce (Ki) and Subcarpathian (Sb) geese, registered by FAO as domestic genetic resources the mean values of qualitative traits of breast muscles (pH15', pH30', pH45', pH24h; colour parameters: L*15', L*30', L*45', L24h, a*15', a*30', a*45', a*24h, b*15', b*30', b*45', b*24h and conductivity: EC45', EC3h, EC24h) were determined. The experimental flocks showed significant variations in the investigated parameters. The Kartuzy goose breast muscles were characterized by higher values of pH15' (6.74), pH30' (6.62), pH45' (6.56) and b*15' parameter (0.80) in comparison with the remaining flocks. Moreover, these muscles had the lowest pH24h (5.65) and values of L* parameter (L*15', L*30', L*45' and L*24h) and EC45' (3.23 mS/cm). The pH value and L* and a* parameters (except L*24h and a*24h) of the analysed flocks were decreasing, and conductivity increasing together with the time post slaughter, and the rate of changes depended on the birds’ origin. Greater differences between pH values, measured 15 min and 24 h after slaughter were stated in breast muscles from Ka (1.09) and Su (0.90) geese than from the other two flocks investigated (Ki – 0.74; Sb – 0.58). The highest increase in conductivity (from EC45' to EC24h) was affirmed in Ka and Ki muscles (3.84 mS/cm) and the lowest in breast muscles of Sb geese (2.72 mS/cm).