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Effect of Season, Transport Length, Deck Location, and Lairage Length on Pork Quality and Blood Cortisol Concentrations of Market Hogs.

Newman D, Young J, Carr C, Ryan M, Berg E - Animals (Basel) (2014)

Bottom Line: Season and deck did not have a main effect on cortisol concentrations or pork quality.Hogs transported 6 h had increased cortisol concentrations (103.0 vs. 95.5 ng/mL; P < 0.001) and decreased L* (52.49 vs. 52.69; P = 0.09), b* (6.28 vs. 6.36; P = 0.03), and hue angle (20.70 vs. 20.95; P = 0.03) compared to hogs transported 3 h.Hogs subjected to 6 h of lairage had increased 24-h pH (5.69 vs. 5.66; P = 0.005), a* (16.64 vs. 16.48; P < 0.0001), b* (6.42 vs. 6.22; P < 0.0001), saturation (17.85 vs. 17.64; P < 0.0001), and hue angle (21.01 vs. 20.65; P = 0.002) and decreased L* (52.49 vs. 52.69; P = 0.07) when compared to hogs subjected to 3 h of lairage.

View Article: PubMed Central - PubMed

Affiliation: Department of Animal Sciences, North Dakota State University, Fargo, ND 58108, USA. david.newman@ndsu.edu.

ABSTRACT
The objective of this study was to investigate the effects of seasonal environment, transport conditions, and time in lairage on pork quality and serum cortisol concentrations. Market hogs were slaughtered during winter (n = 535), spring (n = 645), summer (n = 644), and fall (n = 488). Within season, hogs were randomly assigned to treatments in a 2 × 2 × 2 factorial arrangement, with 2 deck locations (top vs. bottom) and 2 transport and lairage durations (3 h vs. 6 h). Blood samples were collected at exsanguination for analysis of cortisol concentration. Loins were collected at 24 h postmortem for pork quality assessment. Season and deck did not have a main effect on cortisol concentrations or pork quality. Hogs transported 6 h had increased cortisol concentrations (103.0 vs. 95.5 ng/mL; P < 0.001) and decreased L* (52.49 vs. 52.69; P = 0.09), b* (6.28 vs. 6.36; P = 0.03), and hue angle (20.70 vs. 20.95; P = 0.03) compared to hogs transported 3 h. Hogs subjected to 6 h of lairage had increased 24-h pH (5.69 vs. 5.66; P = 0.005), a* (16.64 vs. 16.48; P < 0.0001), b* (6.42 vs. 6.22; P < 0.0001), saturation (17.85 vs. 17.64; P < 0.0001), and hue angle (21.01 vs. 20.65; P = 0.002) and decreased L* (52.49 vs. 52.69; P = 0.07) when compared to hogs subjected to 3 h of lairage.

No MeSH data available.


Related in: MedlinePlus

Averages and ranges of temperatures (a) and relative humidity (b) for each trailer compartment for each season of the 6 h transport duration.
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animals-04-00627-f003: Averages and ranges of temperatures (a) and relative humidity (b) for each trailer compartment for each season of the 6 h transport duration.

Mentions: The commercial producer was responsible for all loading procedures and was directed to load via standard operating procedures. All hogs were fed the same commercial diet and feed was withheld starting at 2100 h the night before slaughter. Hogs were loaded in groups of 20 with no use of electric prods, starting with the top deck first as typical of commercial loading. Hogs assigned to the 6 h treatment were loaded and left the farm at 2330 the night before slaughter while hogs assigned to the 3 h treatment were loaded and left the farm at 0200 the morning of slaughter (Table 1). Both truckloads of hogs slaughtered on the same day originated from the same barn. Trucks used for transport were pot-belly style (Figure 1). Environmental conditions (temperature and relative humidity) in the trailer were monitored at one minute intervals using portable data loggers (HOBO Pro Series RH/Temp. Onset Computer Corp., Pocasset, MA, USA) located in the three compartments (front, middle, rear) of both decks (Figure 2 and Figure 3).


Effect of Season, Transport Length, Deck Location, and Lairage Length on Pork Quality and Blood Cortisol Concentrations of Market Hogs.

Newman D, Young J, Carr C, Ryan M, Berg E - Animals (Basel) (2014)

Averages and ranges of temperatures (a) and relative humidity (b) for each trailer compartment for each season of the 6 h transport duration.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4494428&req=5

animals-04-00627-f003: Averages and ranges of temperatures (a) and relative humidity (b) for each trailer compartment for each season of the 6 h transport duration.
Mentions: The commercial producer was responsible for all loading procedures and was directed to load via standard operating procedures. All hogs were fed the same commercial diet and feed was withheld starting at 2100 h the night before slaughter. Hogs were loaded in groups of 20 with no use of electric prods, starting with the top deck first as typical of commercial loading. Hogs assigned to the 6 h treatment were loaded and left the farm at 2330 the night before slaughter while hogs assigned to the 3 h treatment were loaded and left the farm at 0200 the morning of slaughter (Table 1). Both truckloads of hogs slaughtered on the same day originated from the same barn. Trucks used for transport were pot-belly style (Figure 1). Environmental conditions (temperature and relative humidity) in the trailer were monitored at one minute intervals using portable data loggers (HOBO Pro Series RH/Temp. Onset Computer Corp., Pocasset, MA, USA) located in the three compartments (front, middle, rear) of both decks (Figure 2 and Figure 3).

Bottom Line: Season and deck did not have a main effect on cortisol concentrations or pork quality.Hogs transported 6 h had increased cortisol concentrations (103.0 vs. 95.5 ng/mL; P < 0.001) and decreased L* (52.49 vs. 52.69; P = 0.09), b* (6.28 vs. 6.36; P = 0.03), and hue angle (20.70 vs. 20.95; P = 0.03) compared to hogs transported 3 h.Hogs subjected to 6 h of lairage had increased 24-h pH (5.69 vs. 5.66; P = 0.005), a* (16.64 vs. 16.48; P < 0.0001), b* (6.42 vs. 6.22; P < 0.0001), saturation (17.85 vs. 17.64; P < 0.0001), and hue angle (21.01 vs. 20.65; P = 0.002) and decreased L* (52.49 vs. 52.69; P = 0.07) when compared to hogs subjected to 3 h of lairage.

View Article: PubMed Central - PubMed

Affiliation: Department of Animal Sciences, North Dakota State University, Fargo, ND 58108, USA. david.newman@ndsu.edu.

ABSTRACT
The objective of this study was to investigate the effects of seasonal environment, transport conditions, and time in lairage on pork quality and serum cortisol concentrations. Market hogs were slaughtered during winter (n = 535), spring (n = 645), summer (n = 644), and fall (n = 488). Within season, hogs were randomly assigned to treatments in a 2 × 2 × 2 factorial arrangement, with 2 deck locations (top vs. bottom) and 2 transport and lairage durations (3 h vs. 6 h). Blood samples were collected at exsanguination for analysis of cortisol concentration. Loins were collected at 24 h postmortem for pork quality assessment. Season and deck did not have a main effect on cortisol concentrations or pork quality. Hogs transported 6 h had increased cortisol concentrations (103.0 vs. 95.5 ng/mL; P < 0.001) and decreased L* (52.49 vs. 52.69; P = 0.09), b* (6.28 vs. 6.36; P = 0.03), and hue angle (20.70 vs. 20.95; P = 0.03) compared to hogs transported 3 h. Hogs subjected to 6 h of lairage had increased 24-h pH (5.69 vs. 5.66; P = 0.005), a* (16.64 vs. 16.48; P < 0.0001), b* (6.42 vs. 6.22; P < 0.0001), saturation (17.85 vs. 17.64; P < 0.0001), and hue angle (21.01 vs. 20.65; P = 0.002) and decreased L* (52.49 vs. 52.69; P = 0.07) when compared to hogs subjected to 3 h of lairage.

No MeSH data available.


Related in: MedlinePlus