Comparison of the effects of different transport conditions and lairage times in a Mediterranean climate in South Africa on the meat quality of commercially crossbred Large white x Landrace pigs

Hoffman, Louwrens C.; Fisher, P

doi:10.4102/jsava.v81i4.152

Cited by 13 publications

(9 citation statements)

References 18 publications

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“…This is explained by the fact that reserves of glycogen become depleted during lairage and after a longer lairage there is a lower muscle glycogen content and consequently higher pH value of meat. As in our study, Hoffman and Fisher (2010) determined lower drip loss after longer lairage. In addition, longer lairage increased the level of skin blemishes on the carcass.…”

Section: Resultssupporting

confidence: 82%

“…Since the rate of rigor mortis is positively correlated with the content of cortisol and lactate as indicators of stress ( Warriss et al, 2003b ), a greater degree of rigor mortis after longer lairage indicated a more stressful procedure. Lairage time affected meat colour, so after longer lairage meat became darker, less red and yellow which was also observed by Nanni Costa et al (2002) and Hoffman and Fisher (2010) .…”

Section: Resultssupporting

confidence: 72%

“…(Stam et al, 2000; Bruijnzeel et al, 2001 ; Stam et al, 2002). Lairage time did not have a significant effect on initial or ultimate pH values, although higher pH values were found after longer lairage times in other studies (Perez et al, 2002; Hoffman and Fisher, 2010 ). This is explained by the fact that reserves of glycogen become depleted during lairage and after a longer lairage there is a lower muscle glycogen content and consequently higher pH value of meat.…”

Section: Resultsmentioning

confidence: 55%

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Correlations among Stress Parameters, Meat and Carcass Quality Parameters in Pigs

Dokmanović¹,

Baltić²,

Đurić³

et al. 2015

Asian-Australas J Anim Sci

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Relationships among different stress parameters (lairage time and blood level of lactate and cortisol), meat quality parameters (initial and ultimate pH value, temperature, drip loss, sensory and instrumental colour, marbling) and carcass quality parameters (degree of rigor mortis and skin damages, hot carcass weight, carcass fat thickness, meatiness) were determined in pigs (n = 100) using Pearson correlations. After longer lairage, blood lactate (p<0.05) and degree of injuries (p<0.001) increased, meat became darker (p<0.001), while drip loss decreased (p<0.05). Higher lactate was associated with lower initial pH value (p<0.01), higher temperature (p<0.001) and skin blemishes score (p<0.05) and more developed rigor mortis (p<0.05), suggesting that lactate could be a predictor of both meat quality and the level of preslaughter stress. Cortisol affected carcass quality, so higher levels of cortisol were associated with increased hot carcass weight, carcass fat thickness on the back and at the sacrum and marbling, but also with decreased meatiness. The most important meat quality parameters (pH and temperature after 60 minutes) deteriorated when blood lactate concentration was above 12 mmol/L.

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Section: Resultssupporting

confidence: 82%

Section: Resultssupporting

confidence: 72%

Section: Resultsmentioning

confidence: 55%

See 1 more Smart Citation

Correlations among Stress Parameters, Meat and Carcass Quality Parameters in Pigs

Dokmanović¹,

Baltić²,

Đurić³

et al. 2015

Asian-Australas J Anim Sci

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“…However, road transportation especially long-distance transportation as a stressor could do much harm to the dairy industry. The economic losses due to transport stress include decreased body weight (Greer et al, 2011;Gonzalez et al, 2012), decreased milk production and changes in meat quality (Honkavaara et al, 2003;Hoffman and Fisher, 2010;Smiecinska et al, 2011) and higher incidence of diseases. Significantly higher egg production of Dicrocoelium dendriticum was observed in the feces of transported ewes (Sotiraki et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Differential expression of luteinizing hormone receptor, androgen receptor and heat-shock protein 70 in the testis of long-distance transported mice

et al. 2015

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ABSTRACT. Spermatogenesis, is a complex process of precisely regulated intracellular events, where it is affected by many factors. Long-distance transport of animals is one of the stressors that may influence spermatogenesis and sperm quality. The present study chose luteinizing hormone receptor (LHR), androgen receptor (AR), and heatshock protein 70 (HSP70) as our target genes to investigate their mRNA and protein expression in the testes of long-distance transported (about 1000 km) mice. Histological analysis showed that there was a reduction in the thickness of the seminiferous epithelium in the transported mice, and a significant decrease in body weight and sperm count in the epididymis was also observed. mRNA expression was determined by QPCR in the testis of transported and control mice. The levels for AR decreased significantly in transported mice. LHR and HSP70 expression in the testes of the transported mice was slightly higher than that of control mice but did not reach a significant level. A similar tendency of protein expression was also observed by Western blot analysis. The levels of LHR and HSP70 increased slightly after transportation. However, none of the changes were statistically significant compared with the control mice. In conclusion, long-distance transport has an adverse effect on reproductive organs and spermatozoa in adult mice.

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“…Poor pork quality as a result of pre-slaughter stress is widespread in the industry and this is of great concern (Hambrecht et al, 2004;Hoffman & Fisher, 2010). It occurs to such an extent that even stress resistant breeds are affected (Hambrecht et al, 2004;Küchenmeister et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

The novel use of “point of care” devices to evaluate transport duration on selected pork quality parameters

Seshoka¹,

Kanengoni²,

Siebrits³

et al. 2014

SA J. An. Sci.

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Point-of-care (POC) devices were used to measure plasma metabolic substrates in pigs subjected to stressful conditions. These were then related to the meat pH, drip loss and carcass temperature. Forty Large White x Landrace pigs (20 females and 20 males) weighing approximately 67 ± 6.5 kg were used in the study. Twenty of the pigs were subjected to a stressful regimen for two hours and the other 20 pigs were transported for 15 minutes from their pens directly to the abattoir. Salivary cortisol, plasma glucose, triglycerides and lactate concentrations were determined before and after transportation to the abattoir and carcass temperature, pH and drip loss were measured after slaughter. There were no differences in the lactate, cortisol, pH and triglycerides measurements from the pigs of different sexes. Female pigs had higher carcass temperature and lower glucose levels than male pigs. Regression analysis showed that back fat and lactate accounted for 99% of variation in the pH 24h of pigs transported over a short duration while lactate was responsible for only 16% of the variation in pigs transported over the long duration. The difference in lactate accounted for 78% of variation in the carcass temperature at 45 minutes for pigs transported over the short duration while in the long duration group, the weight was responsible for 81% of the variation. In conclusion, POC devices measured differences in lactate concentrations in pigs transported over different durations and relationships between the lactate and the carcass pH, carcass temperature and drip loss was determined.

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Comparison of the effects of different transport conditions and lairage times in a Mediterranean climate in South Africa on the meat quality of commercially crossbred Large white x Landrace pigs

Cited by 13 publications

References 18 publications

Correlations among Stress Parameters, Meat and Carcass Quality Parameters in Pigs

Correlations among Stress Parameters, Meat and Carcass Quality Parameters in Pigs

Differential expression of luteinizing hormone receptor, androgen receptor and heat-shock protein 70 in the testis of long-distance transported mice

The novel use of “point of care” devices to evaluate transport duration on selected pork quality parameters

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