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Research Article| Volume 24, ISSUE 3, P208-218, June 2008

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Effects of Slaughter Date, On-Farm Handling, Transport Stocking Density, and Time in Lairage on Digestive Tract Temperature, Serum Cortisol Concentrations, and Pork Lean Quality of Market Hogs1

  • Author Footnotes
    2 Present address: University of Florida, Gainesville 32608.
    C.C. Carr
    Footnotes
    2 Present address: University of Florida, Gainesville 32608.
    Affiliations
    Division of Animal Science, University of Missouri, Columbia 65211
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  • Author Footnotes
    3 Present address: North Dakota State University, Fargo 58105.
    D.J. Newman
    Footnotes
    3 Present address: North Dakota State University, Fargo 58105.
    Affiliations
    Division of Animal Science, University of Missouri, Columbia 65211
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  • Author Footnotes
    4 Present address: University of Kentucky, Lexington 40546.
    G.K. Rentfrow
    Footnotes
    4 Present address: University of Kentucky, Lexington 40546.
    Affiliations
    Division of Animal Science, University of Missouri, Columbia 65211
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  • D.H. Keisler
    Affiliations
    Division of Animal Science, University of Missouri, Columbia 65211
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  • Author Footnotes
    3 Present address: North Dakota State University, Fargo 58105.
    E.P. Berg
    Footnotes
    3 Present address: North Dakota State University, Fargo 58105.
    Affiliations
    Division of Animal Science, University of Missouri, Columbia 65211
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  • Author Footnotes
    1 This research was supported by the National Pork Board, Des Moines, IA.
    2 Present address: University of Florida, Gainesville 32608.
    3 Present address: North Dakota State University, Fargo 58105.
    4 Present address: University of Kentucky, Lexington 40546.
DOI:https://doi.org/10.1532/S1080-7446(15)30842-1
Effects of Slaughter Date, On-Farm Handling, Transport Stocking Density, and Time in Lairage on Digestive Tract Temperature, Serum Cortisol Concentrations, and Pork Lean Quality of Market Hogs1
Previous ArticleImpact of Alternative Energy Systems on the Estimated Feed Requirements of Pigs with Varying Lean and Fat Tissue Growth Rates When Fed Corn and Soybean Meal-Based Diets
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      Abstract

      The objective of this study was to evaluate the effect of on-farm handling intensity (conventional vs. passive), transport stocking density: (high vs. low), and preslaughter lairage time (45 min vs. 3 h) on digestive tract temperature, serum cortisol concentrations, and pork quality of market pigs slaughtered in November (NOV; n = 111), February (FEB; n = 113), and August (AUG; n = 112). Pigs slaughtered in FEB had greater (P ≤ 0.027) digestive tract temperatures before loadout than pigs slaughtered in NOV or AUG. The digestive tract temperature of pigs slaughtered in AUG was greater (P ≤ 0.027) during than before loadout. Pigs afforded 3 h of lairage tended to have greater (P = 0.068) digestive tract temperatures than pigs given 45 min of lairage. When pigs were slaughtered in AUG and NOV, those afforded 3 h of lairage had greater (P = 0.042) cortisol concentrations than pigs given only 45 min of lairage. Carcasses of pigs slaughtered in AUG had a paler (P ≤ 0.032) LM than carcasses of pigs slaughtered in NOV and FEB, and greater (P ≤ 0.032) LM purge losses than pigs slaughtered in FEB. Pigs given a 45 min lairage had greater (P = 0.036) 30-h LM pH values, darker LM (P = 0.008), greater (P = 0.012) subjective color scores, and tended (P = 0.069) to have lower purge loss percentages than pigs given a 3-h lairage. Results indicated that pigs should have less than 3 h of lairage when the day\s low ambient temperature is ≤ 22°C to decrease antemortem stress and improve lean quality.

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      DOI: https://doi.org/10.1532/S1080-7446(15)30842-1

      Copyright

      © 2008 American Registry of Professional Animal Scientists. Published by Elsevier Inc. All rights reserved.

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