Relationship between feeding, stereotypies, and plasma glucose concentrations in food-restricted and restrained sows

E. M Claudia Terlouw*, Alistair B. Lawrence, Jaap M. Koolhaas, M. Cockram

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Previous work has shown that stereotypies, such as chain manipulation and excessive drinking, only develop in food-restricted sows. Furthermore, once stereotypies have been developed, ingestion of a small meal specifically stimulates the performance of stereotypies. These results suggest that the occurrence of stereotypies may strongly depend on the individual's nutritional status. As glucose is one of the main metabolic fuels, the present experiment investigated whether individual differences and/or daily variations in levels of chain manipulation and excessive drinking are correlated to individual differences and/or daily variations in pre- or postfeeding glucose concentrations. Blood samples were taken at regular intervals prior to, during, and after feeding, from sows that had developed stereotypies to different degrees over a period of 110 days of restrictive housing and feeding conditions. Glucose concentrations were low prior to and high after feeding. Levels of stereotypies showed similar variations, suggesting that the performance of stereotypies is not related to low glucose concentrations. Furthermore, whilst sows differed consistently in glucose concentrations, no correlations were found between individual glucose concentrations and stereotypies. Similarly, no correlations were found between glucose concentrations and chain manipulation or drinking on a sample to sample basis. These data show that although performance of stereotypies is strongly dependent on feeding regime, it is not related to plasma glucose concentrations.

Original languageEnglish
Pages (from-to)189-193
Number of pages5
JournalPhysiology and Behavior
Volume54
Issue number1
DOIs
Publication statusPublished - 1993

Keywords

  • Chain manipulation
  • Excessive drinking
  • Feeding
  • Food restriction
  • Glucose
  • Hypoglycemia
  • Individual differences
  • Pigs
  • Polydipsia
  • Sows
  • Stereotypies

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