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 Hogs

C. C. Carr, D. J. Newman, G. K. Rentfrow, D. H. Keisler, E. P. Berg

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

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.

Original languageEnglish
Pages (from-to)208-218
Number of pages11
JournalProfessional Animal Scientist
Volume24
Issue number3
DOIs
StatePublished - Jun 1 2008

Bibliographical note

Funding Information:
1This research was supported by the Na tional Pork Board, Des Moines, IA. 2Present address: University of Florida, Gainesville 32608. 3Present address: North Dakota State University, Fargo 58105. 4Present address: University of Kentucky, Lexington 40546. 5Corresponding author: eric.p.berg@ ndsu.edu

Publisher Copyright:
© 2008 American Registry of Professional Animal Scientists.

Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.

Keywords

  • Antemortem stress
  • Cortisol
  • Digestive tract temperature
  • Pork quality

ASJC Scopus subject areas

  • Food Science
  • Animal Science and Zoology

Fingerprint

Dive into the research topics of '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 Hogs'. Together they form a unique fingerprint.

Cite this