Effects of lighting on heart rates and respiratory rates in Calves
This study aims to see if light intensities can affect calves’ physiological reactions to their environment, in this case an obstacle course and a novel-object test. An additional red light setting compared to a white light was also tested in low light intensities. Twelve 2–4 month old heifer calves...
| Autor principal: | |
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| Formato: | Second cycle, A2E |
| Lenguaje: | sueco Inglés |
| Publicado: |
2016
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| Materias: | |
| Acceso en línea: | https://stud.epsilon.slu.se/9014/ |
| _version_ | 1855571447046471680 |
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| author | Spellerberg, Liv |
| author_browse | Spellerberg, Liv |
| author_facet | Spellerberg, Liv |
| author_sort | Spellerberg, Liv |
| collection | Epsilon Archive for Student Projects |
| description | This study aims to see if light intensities can affect calves’ physiological reactions to their environment, in this case an obstacle course and a novel-object test. An additional red light setting compared to a white light was also tested in low light intensities. Twelve 2–4 month old heifer calves were used. Two tests were performed in succession; an obstacle course followed by a novel-object test, under four light intensities; 225±20 lx (full), 5±0.7 lx, 0.5±0.2 lx and 0.5±0.2 lx in red light. Heart rate and respiratory measurements were taken before and after the obstacle course and after the novel-object test. The overall results showed an increased HR in 225 lx and 0.5 lx in red compared to all other light intensities (p<0.05), whereas 5 lx showed the lowest heart rate compared to all other light intensities (p<0.05). Results from measurements taken before the obstacle course showed the largest increase in heart rate in 225 lx and 0.5 lx red (p<0.05). For measurements taken after the obstacle course, 225 lx gave the highest heart rate course (p<0.05), 0.5 lx and 0.5 lx in red were intermediate (p<0.05) and 5 lx gave the lowest (p<0.05). After the novel-object test there were no differences in hart rates, these were all lower than both before (p<0.05) and after (p<0.05) the OC. There was no effect of light intensity on respiratory rate. However, the respiratory rate was higher after the obstacle course independent of light-intensity (i.e., treatment) (p<0.05). There was no difference in respiratory rate for the measurements taken before the obstacle course and after the novel-object test. In conclusion, 225 lx and 0.5 lx red gave an increase in heart rate in calves before the obstacle course. After the obstacle course, the full lighting (225 lx) had an increasing effect on heart rate, while the effect of both low light intensities (0.5 lx and 0.5 lx red) heart rate was intermediately high. There were no treatment effects on heart rate during the novel-object test. There were no treatment effects on respiratory rate at any measuring point. |
| format | Second cycle, A2E |
| id | RepoSLU9014 |
| institution | Swedish University of Agricultural Sciences |
| language | Swedish Inglés |
| publishDate | 2016 |
| publishDateSort | 2016 |
| record_format | eprints |
| spelling | RepoSLU90142016-05-12T14:19:58Z https://stud.epsilon.slu.se/9014/ Effects of lighting on heart rates and respiratory rates in Calves Spellerberg, Liv Animal ecology Animal structure Animal physiology and biochemistry This study aims to see if light intensities can affect calves’ physiological reactions to their environment, in this case an obstacle course and a novel-object test. An additional red light setting compared to a white light was also tested in low light intensities. Twelve 2–4 month old heifer calves were used. Two tests were performed in succession; an obstacle course followed by a novel-object test, under four light intensities; 225±20 lx (full), 5±0.7 lx, 0.5±0.2 lx and 0.5±0.2 lx in red light. Heart rate and respiratory measurements were taken before and after the obstacle course and after the novel-object test. The overall results showed an increased HR in 225 lx and 0.5 lx in red compared to all other light intensities (p<0.05), whereas 5 lx showed the lowest heart rate compared to all other light intensities (p<0.05). Results from measurements taken before the obstacle course showed the largest increase in heart rate in 225 lx and 0.5 lx red (p<0.05). For measurements taken after the obstacle course, 225 lx gave the highest heart rate course (p<0.05), 0.5 lx and 0.5 lx in red were intermediate (p<0.05) and 5 lx gave the lowest (p<0.05). After the novel-object test there were no differences in hart rates, these were all lower than both before (p<0.05) and after (p<0.05) the OC. There was no effect of light intensity on respiratory rate. However, the respiratory rate was higher after the obstacle course independent of light-intensity (i.e., treatment) (p<0.05). There was no difference in respiratory rate for the measurements taken before the obstacle course and after the novel-object test. In conclusion, 225 lx and 0.5 lx red gave an increase in heart rate in calves before the obstacle course. After the obstacle course, the full lighting (225 lx) had an increasing effect on heart rate, while the effect of both low light intensities (0.5 lx and 0.5 lx red) heart rate was intermediately high. There were no treatment effects on heart rate during the novel-object test. There were no treatment effects on respiratory rate at any measuring point. Syftet med den här studien var att se om olika ljusintensiteter kan påverka kalvars fysiologiska reaktion på sin omgivning, i det här fallet en hinderbana och ett novel-object-test. I låga ljusintensiteter testades även rött ljus som komplement till vitt ljus. Till studien användes tolv stycken 2-4 månader gamla kvigkalvar. För att testa kalvarnas fysiologiska respons i 225±20 lx, 5±0,7 lx, 0,5±0,2 lx och 0,5±0,2 lx med röda lampor, användes en hinderbana direkt följd av ett novel-object-test. Hjärt- och andningsfrekvenserna mättes före och efter hinderbanan samt efter novel-object-testet. Resultaten visade att 225 lx och 0,5 lx med röda lampor gav störst ökningar i hjärtfrekvens (HR) överlag (p<0,05), medan HR var lägst i 5 lx (p<0,05). Resultaten från mätningar innan hinderbanan visade att 225 lx och 0,5 lx i rött gav högst HR (p<0,05). Resultaten från mätningar efter hinderbanan visade att HR var högst i 225 lx (p<0,05), medan HR var mittemellan i 0,5 lx, rött, och 0,5 lx (p<0,05) och lägst i 5 lx (p<0,05). Det fanns inga signifikanta skillnader i HR mellan de testade ljusintensiteterna i mätningar tagna efter novel-object-testet. Ljusintensiteterna gav heller ingen signifikant effekt på andningsfrekvens. Den effekt som kunde ses på andningsfrekvensen var att den hade ökat efter hinderbanan jämfört med innan. Efter hinderbanan sjönk andningsfrekvensen. Slutsatsen är att 225 lx och 0,5 lx rött gav en ökad HR före hinderbanan. Efter hinderbanan ökade 225 lx HR hos kalvarna, medan HR var medelhög i de lägsta ljusintensiteterna (0,5 lx och 0,5 lx rött). Ingen av ljusintensiteterna hade någon effect på HR under novel-object-testet. Det fanns inga behandlingseffekter på andningsfrekvens vid någon av mätpunkterna. 2016-04-29 Second cycle, A2E NonPeerReviewed application/pdf sv https://stud.epsilon.slu.se/9014/1/spellerberg_l_160429.pdf Spellerberg, Liv, 2016. Effects of lighting on heart rates and respiratory rates in Calves. Second cycle, A2E. Uppsala: (VH) > Dept. of Animal Nutrition and Management (until 231231) <https://stud.epsilon.slu.se/view/divisions/OID-650.html> urn:nbn:se:slu:epsilon-s-5339 eng |
| spellingShingle | Animal ecology Animal structure Animal physiology and biochemistry Spellerberg, Liv Effects of lighting on heart rates and respiratory rates in Calves |
| title | Effects of lighting on heart rates and respiratory rates in Calves |
| title_full | Effects of lighting on heart rates and respiratory rates in Calves |
| title_fullStr | Effects of lighting on heart rates and respiratory rates in Calves |
| title_full_unstemmed | Effects of lighting on heart rates and respiratory rates in Calves |
| title_short | Effects of lighting on heart rates and respiratory rates in Calves |
| title_sort | effects of lighting on heart rates and respiratory rates in calves |
| topic | Animal ecology Animal structure Animal physiology and biochemistry |
| url | https://stud.epsilon.slu.se/9014/ https://stud.epsilon.slu.se/9014/ |