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Postslaughter state of muscle tissue of pigs depending on the duration of pre-slaughter fasting

https://doi.org/10.21323/2414-438X-2022-7-3-156-163

Abstract

Changes in the muscle tissue microstructure lead to changes in meat quality. One of the causes of the myopathy development is animal stress. Pigs experience the strongest stress during pre-slaughter holding. The study of the postmortem meat structure depending on fasting time is a topical task. The objects of the research were samples of m. L. dorsi obtained after slaughter from pigs that differed in fasting time: 4 (group 1), 8 (group 2), 10 (group 3), 16 (group 4) and 18 (group 5) hours (N = 20, n = 4). Investigation of the microstructure and morphometric measurements were carried out on preparations stained with hematoxylin and eosin. Myopathic changes in muscle tissue were assessed using a semi-quantitative method developed earlier. All studied samples were characterized by the uniform condition of muscle tissue. Statistically significant differences between individual groups were observed regarding the number and area of giant fibers, sarcomere length, diameter of muscle fibers and proportion of muscle fibers, which diameter was lower or higher by 1/3 than the mean fiber diameter. An increase in the pre-slaughter holding time reduced the number and area of giant fibers (r = –0.8437 and –0.5796, respectively), as well as the diameter of “normal” fibers (r = –0.5337), which positively influenced pork quality. Groups 1, 2 and 3 were characterized by the presence of signs of moderate and pronounced myopathy. Only one carcass with pronounced myopathic signs was revealed in each of groups 4 and 5. In group 4, one carcass did not have signs of myopathy. Pre-slaughter holding during 4, 8 and 10 hours led to deterioration of pork quality. The recommended fasting time is 16 hours.

About the Authors

A. A. Semenova
V.M. Gorbatov Federal Research Center for Food Systems
Russian Federation

Anastasia A. Semenova, Doctor of Technical Sciences, Professor, Deputy Director

26, Talalikhina str., 109316, Moscow

Tel.: +7–495–676–95–11 (105)


V. A. Pchelkina
V.M. Gorbatov Federal Research Center for Food Systems
Russian Federation

Viktoriy A. Pchelkina, Candidate of Technical Sciences, Leading Researcher, Experimental Clinic-Laboratory of Biologically Active Substances of Animal Origin

26, Talalikhina str., 109316, Moscow

Tel.: +7–495–676–95–11 (242)


V. V. Nasonova
V.M. Gorbatov Federal Research Center for Food Systems
Russian Federation

Victoria V. Nasonova, Candidate of Technical Sciences, Head of Department of Applied Scientific and Technological Development

26, Talalikhina str., 109316, Moscow

Tel.: +7–495–676–95–11 (242)


T. G. Kuznetsova
V.M. Gorbatov Federal Research Center for Food Systems
Russian Federation

Tatyana G. Kuznetsova, Doctor of Veterinary Sciences, Leading Researcher, Department of Applied Scientific and Technological Development

26, Talalikhina str., 109316, Moscow

Tel.: +7–495–676–95–11 (277)


A. I. Sinichkina
V.M. Gorbatov Federal Research Center for Food Systems
Russian Federation

Alena I. Sinichkina, Junior Researcher, Department of Applied Scientific and Technological Development

26, Talalikhina str., 109316, Moscow

Tel.: +7–495–676–95–11 (213)


S. I. Loskutov
V. M. Gorbatov Federal Research Center for Food Systems
Russian Federation

Svyatoslav I. Loskutov, Senior Researcher, Department of Applied Scientific and Technological

26, Talalikhina str., 109316, Moscow

Tel.: +7–905–214–43–23


M. G. Chabaev
L.K. Ernst Federal Research Center for Animal Husbandry
Russian Federation

Magomed G. Chabaev, Doctor of Agricultural Sciences, Professor, Leading Researcher

Podolsk, Moscow Region

Tel.: +7–496–765–12–90


N. V. Bogolyubova
L.K. Ernst Federal Research Center for Animal Husbandry
Russian Federation

Nadezhda V. Bogolubova, Doctor of Biological Sciences, Leading Researcher

Podolsk, Moscow Region

Tel.: +7–496–765–11–69


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Review

For citations:

Semenova A.A., Pchelkina V.A., Nasonova V.V., Kuznetsova T.G., Sinichkina A.I., Loskutov S.I., Chabaev M.G., Bogolyubova N.V. Postslaughter state of muscle tissue of pigs depending on the duration of pre-slaughter fasting. Theory and practice of meat processing. 2022;7(3):156-163. https://doi.org/10.21323/2414-438X-2022-7-3-156-163

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ISSN 2414-438X (Print)
ISSN 2414-441X (Online)

109316, Russian Federation, Moscow, Talalikhina str. 26.
V.M. Gorbatov Federal Research Center for Food Systems of
Russian Academy of Sciences
Теl: +7(495) 676-9511 (300)
e-mail: a.zakharov@fncps.ru

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