EFFECTS OF ENVIRONMENT ON PHYSIOLOGICAL AND BIOCHEMICAL PROPERTIES OF PIGS WITH FAST AND SLOW GLYCOLYZING MUSCLE

Autor:	E. J. Briskey, D. G. Topel, R. G. Cassens, J. A. Will, W. E. Weirich, D. E. Galloway
Rok vydání:	1973
Předmět:	chemistry.chemical_compound Veterinary medicine Animal science Food Animals Glycogen chemistry Heart rate Respiration Animal Science and Zoology Biology Lactic acid Phosphocreatine
Zdroj:	Canadian Journal of Animal Science. 53:659-663
ISSN:	1918-1825 0008-3984
DOI:	10.4141/cjas73-103
Popis:	Ten Chester White (slow glycolyzing muscle) and 10 Poland China (fast glycolyzing muscle) market weight pigs were consecutively exposed for 2 days to each of four environments (25 C, 6 C, 6–43 C fluctuating six times daily, and 37 C) in the University of Wisconsin Biotron. Postmortem muscle levels of adenosine triphosphate (ATP) and glycogen were significantly lower in the Poland China animals. Initial level of phosphocreatine (PC) was lower in the Poland China animals. Lactic acid accumulation and pH decline were significantly more rapid in the Poland China animals. The 24-h color scores were, however, normal in muscles from both kinds of animals. Daily heart rate and respiration changes indicated more rapid adaptation to environmental changes in the Chester White animals. Partial pressures of blood O2 and CO2 were not significantly different between the two groups of animals and varied with environmental changes as expected.
Databáze:	OpenAIRE
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