Przeglądaj wg Autor "Brodzik, Urszula"

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    PozycjaOpen Access
    The Effect of Age on the Quality of Broiler Duck Meat
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2019) Biesiada-Drzazga, Barbara; Banaszewska, Dorota; Brodzik, Urszula; Department of Breeding Methods and Poultry Breeding, Siedlce University of Natural Sciences and Humanities; Department of Breeding Methods and Poultry Breeding, Siedlce University of Natural Sciences and Humanities; Department of Breeding Methods and Poultry Breeding, Siedlce University of Natural Sciences and Humanities
    The aim of the study was to evaluate selected quality characteristics of duck meat depending on the age of the ducks. The material consisted of 100 Pekin – STAR 53 H.Y. crossbred meat ducks of French origin. The ducks were reared for 8 weeks. During the entire period they were reared in an intensive system as broilers. The breast muscles contained from 22.15% to 23.34% crude protein, and the content of this component increased slightly with the age of the ducks. There was a marked increase in crude fat content in these muscles. The leg muscles of the ducks contained less crude protein than the breast muscles (from 21.03% to 22.34%) and markedly more crude fat (from 4.17% to 6.80%). No changes were observed in cholesterol content in the muscles in successive weeks of rearing; only an increasing tendency was noted for cholesterol content as fat content increased in the muscles. The breast muscles contained on average from 2 to 22 μg of retinol and from 10 to 28 μg of gamma-tocopherol per 100 g of muscle tissue, while the leg muscles contained from 10 to 22 μg of retinol and from 10 to 30 μg of gamma-tocopherol. As in the breast muscles, age was not found to affect retinol content in the leg muscles, but the amount of gamma-tocopherol in the leg muscles changed in a reverse in direction as in the breast muscles, i.e. it increased with the age of the ducks. The lipids of the breast muscles of the ducks in weeks 6, 7 and 8 of rearing contained from 46.0% to 47.8% saturated fatty acids (SFA) and from 52.2% to 54.0% unsaturated fatty acids (UFA). An increase was observed in the share of UFA and a decrease in that of SFA between the ages of 6 and 8 weeks. The leg muscles contained markedly less SFA and more UFA than the breast muscles.