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Förekomsten av aggressivt beteende och stereotypa gallerbitningar hos suggor i två olika utfodringssystem
Karlstad University, Faculty of Health, Science and Technology (starting 2013).
2016 (Swedish)Independent thesis Basic level (degree of Bachelor), 180 HE creditsStudent thesisAlternative title
The presence of aggressive behaviour and stereotyped bar biting of sows in two different feeding systems (English)
Abstract [en]


A behavioral study made of breeding sows in open housing stalls on a farm in Dalsland, Sweden. The purpose of this study was to evaluate how two different feeding systems affect the welfare of sows. The feeding methods studied were walk-in/lock-in feeding booths versus electronic transponder feeding (Electronic Sow Feeding, ESF) and response variables were the number of aggressive bites and stereotyped bar biting. Walk-in/lock-in booths do restricts the sow's ability to perform a more natural foraging behavior compared to electronic transponder feeding and this should lead to (1) more stereotyped bar biting and (2) more aggressive attacks in the form of aggressive biting in the stall with walk-in/lock-in booths. Fifty individuals in each system were randomly selected and each individual was observed in 180 seconds. All bites and bar biting behaviour was registered on an etogram throughout the measuring time. The result showed that there was a significant difference (P = 0.03) in aggressive behavior between the two feeding systems, but only a few total bar bitings were registered (n = 4). Overestimation of transponders capacity, group size and group dynamics are factors that may be responsible for the outcome. A lower calorie feed, richer in fiber, might be preferred in the feeding of sows to satisfy hunger and reduce aggression.

Abstract [sv]


På en suggpool i Dalsland gjordes en beteendestudie på avelssuggor i lösdriftstall. Syftet med studien var att utvärdera hur två olika utfodringsätt påverkar välbefinnandet hos avelsuggor. De studerade utfodringsätten var traditionell båsutfodring ("walk-in/lock-in"-bås) och elektronisk transponderutfodring (Electronic Sow Feeding, ESF) och beteenden som noterades var aggressiva bett, samt stereotypa gallerbitningar. Då båsutfodring begränsar suggornas möjligheter till att utföra ett mer naturligt födosöksbeteende jämfört med elektronisk transponderutfodring, bör detta leda till (1) fler stereotypa gallerbitningar och (2) fler aggressiva angrepp i form av bett i båsutfodringen. Femtio individer i respektive system slumpades ut och varje individ observerades i 180 sekunder. Alla bett och gallerbitningar registrerades på etogram under hela mättiden. Resultatet visade att det fanns en signifikant skillnad (P = 0,03) i aggressivt beteende mellan de olika utfodringssystemen, men det registrerades endast ett fåtal gallerbitningar totalt (n = 4). Överskattning av transpondrarnas kapacitet, gruppstorlek och gruppdynamik är faktorer som kan vara orsaken till resultatet. Även ett lågkoncentrerat foder är att föredra vid utfodring av suggor för att stilla hunger.

Place, publisher, year, edition, pages
2016. , 12 p.
Keyword [sv]
Suggor, ESF, Walk in/ lock in, utfodring, aggressivitet, stereotypa beteenden
National Category
Natural Sciences
URN: urn:nbn:se:kau:diva-46372OAI: diva2:1010209
Subject / course
Educational program
Biology programme, 180 hp
2016-06-15, Karlstad Universitet, Universitetsgatan 2, Karlstad, 09:19 (Swedish)
Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2016-10-03Bibliographically approved

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