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Investigating novel biomarkers of welfare in swine

Ken Engele
Ethology
July 4, 2023

Biomarkers are objective and quantifiable characteristics of biological processes. There are many measures taken to evaluate acute experiences that influence animal welfare, such as measurement of cortisol, a hormone that increases in acute stress after aggression. There is currently a lack of reliable biomarkers that can provide information on longer-term welfare in farmed animals. Measurement of hormones within hair has been proposed as a method to evaluate stress over a longer-term. Another hormone of the HPA axis is dehydroepiandrosterone (DHEA). While less researched, DHEA is thought to have roles largely opposing those to cortisol. The cortisol:DHEA ratio has been suggested to be a superior biomarker compared to either analyte separately.

The objective of Goal 3 of the NSERC Industrial Research Chair program in swine welfare is to evaluate the use of measuring hormones in swine hair. Over a series of three experiments, the objectives of this goal will evaluate and validate the value of measuring cortisol and DHEA in swine hair as a measure of chronic stress, animal welfare, and of individual stress reactivity in pigs. The results of this work will help to conclude whether hair analysis is a useful tool for use by researchers and industry alike.

Investigating novel biomarkers of welfare in swine (full article)

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Research Areas
EngineeringEthologyManagementMediaNutritionOntario PorkProductionSwine Innovation Porc

Engineering

  • Optimizing temperature requirements of pigs to reduce energy use in swine production
  • Investment cost and payback period of a modified prototype livestock trailer
  • Alternative energy and heating sources

Nutrition

  • Transepithelial ion transport in the stomach of pigs exposed to gastric ulcer conditions
  • Developing an Indigestible Protein Index to Investigate the Effects of Dietary Protein in Pigs
  • Impact of fibre on performance and intestinal health of pigs fed a high indigestible protein level

Ethology

  • The influence of straw enrichment on hair hormone concentrations, behaviour, and productivity of growing pigs
  • Rearing pigs with play opportunities: The effects on disease resilience in pigs experimentally inoculated with PRRSV
  • Promoting play behaviour in grow-finish pigs

Management

  • Quality of Life Handbook – The use of environmental enrichment
  • Seek and you shall find; The value of postmortem, in pigs?
  • P1 development strategies for peak performance

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