Effect of Stocking Density during CO2 Stunning of Pigs on Induction Time and Activity Level Measured Using AI
Abstract
:Simple Summary
Abstract
1. Introduction
2. Materials and Methods
2.1. Animals, Lairage, Driving and Stunning Procedure
2.2. Recording of Video during Stunning
2.3. Analysis of Video Recordings of Animal Behaviour
2.4. Statistical Analysis
3. Results
3.1. Time from First Response to Loss of Posture
3.2. Mean Activity Level during Stunning
3.3. Levels of High Activity during Stunning
4. Discussion
4.1. Criteria for Method Selection
4.2. Method of Behavioural Assessment
4.3. Study Results
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Criteria | Definition |
---|---|
First response | A response is recorded after the gondola has commenced the descent. At least one pig responds with alertness by either a sudden, typically small, movement (most pigs are not moving just before the descent) or raising the head with increased sniffing. |
Loss of posture (LOP) | The pig either lies down and is no longer able to regain a standing or sitting posture, or the pig remains in a sitting posture against the wall or other pigs while displaying opisthotonos, indicating that the pig is not able to remain in a sitting posture, but is mechanically prevented from lying down. |
Group Size in Gondola | Group Size in Gondola | FLOP (p-Values) | LLOP (p-Values) |
---|---|---|---|
3 | 4 | 0.4115 | 0.2866 |
7 | 0.0015 | 0.0052 | |
8 | <0.0001 | 0.0002 | |
4 | 7 | <0.0001 | 0.0049 |
8 | <0.0001 | <0.0001 | |
7 | 8 | 0.0210 | 0.1090 |
Group Size in Gondola | Group Size in Gondola | FLOP (p-Values) | LLOP (p-Values) |
---|---|---|---|
3 | 4 | 0.5782 | 0.3513 |
7 | 0.0036 | 0.0004 | |
8 | <0.0001 | <0.0001 | |
4 | 7 | <0.0001 | <0.0001 |
8 | <0.0001 | <0.0001 | |
7 | 8 | 0.0274 | 0.0364 |
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Bonnichsen, R.; Hansen, C.; Søndergaard, J.R.; Schrøder-Petersen, D.L. Effect of Stocking Density during CO2 Stunning of Pigs on Induction Time and Activity Level Measured Using AI. Animals 2024, 14, 1953. https://doi.org/10.3390/ani14131953
Bonnichsen R, Hansen C, Søndergaard JR, Schrøder-Petersen DL. Effect of Stocking Density during CO2 Stunning of Pigs on Induction Time and Activity Level Measured Using AI. Animals. 2024; 14(13):1953. https://doi.org/10.3390/ani14131953
Chicago/Turabian StyleBonnichsen, Rikke, Claus Hansen, Jon Raunkjær Søndergaard, and Dorte Lene Schrøder-Petersen. 2024. "Effect of Stocking Density during CO2 Stunning of Pigs on Induction Time and Activity Level Measured Using AI" Animals 14, no. 13: 1953. https://doi.org/10.3390/ani14131953
APA StyleBonnichsen, R., Hansen, C., Søndergaard, J. R., & Schrøder-Petersen, D. L. (2024). Effect of Stocking Density during CO2 Stunning of Pigs on Induction Time and Activity Level Measured Using AI. Animals, 14(13), 1953. https://doi.org/10.3390/ani14131953