The effects of two light programs on sleep in dairy cattle
Sleep is a vital part of life. Even so a lot of the mechanics regarding sleep is unknown. The dairy cattle of today live a stressful life, as their high milk yields forces them to eat large amounts of feed and spend a great portion of the day ruminating. Do they have time to get enough sleep? Which...
| Autor principal: | |
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| Formato: | H2 |
| Lenguaje: | Inglés sueco |
| Publicado: |
SLU/Dept. of Animal Nutrition and Management (until 231231)
2012
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| Materias: |
| _version_ | 1855570792898625536 |
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| author | Andersson, Lisa |
| author_browse | Andersson, Lisa |
| author_facet | Andersson, Lisa |
| author_sort | Andersson, Lisa |
| collection | Epsilon Archive for Student Projects |
| description | Sleep is a vital part of life. Even so a lot of the mechanics regarding sleep is unknown. The dairy cattle of today live a stressful life, as their high milk yields forces them to eat large amounts of feed and spend a great portion of the day ruminating. Do they have time to get enough sleep? Which factors affecting the need of sleep in dairy cattle are largely un-known. In this study the effects of light are investigated. A crossover design with five pregnant, lactating cows divided into two groups were subjected to a 36 h period of either complete light or complete darkness (except for a 4 h long lit period per 24 h) with two weeks between each treatment. With glue-on electrodes on the cows heads the sleeping times and sleep stages could be recorded by means of an ambulatory EEG device. Standing and lying times were recorded by an activity meter fastened on one of the hind legs.
The study showed that light seems to have little effect on the sleep in dairy cattle. Other results might have been found if the study had been going on for a longer period of time. The total time spent sleeping and drowsing were slightly higher during the day when com-pared to the night during the completely lit treatment and more time was also spent drows-ing during the day than during the night. These results are in line with previous findings on the subject. There were also no differences in the standing and lying times. |
| format | H2 |
| id | RepoSLU5128 |
| institution | Swedish University of Agricultural Sciences |
| language | Inglés swe |
| publishDate | 2012 |
| publishDateSort | 2012 |
| publisher | SLU/Dept. of Animal Nutrition and Management (until 231231) |
| publisherStr | SLU/Dept. of Animal Nutrition and Management (until 231231) |
| record_format | eprints |
| spelling | RepoSLU51282013-01-10T14:50:09Z The effects of two light programs on sleep in dairy cattle Andersson, Lisa Sleep Dairy cattle Light program EEG Sleep is a vital part of life. Even so a lot of the mechanics regarding sleep is unknown. The dairy cattle of today live a stressful life, as their high milk yields forces them to eat large amounts of feed and spend a great portion of the day ruminating. Do they have time to get enough sleep? Which factors affecting the need of sleep in dairy cattle are largely un-known. In this study the effects of light are investigated. A crossover design with five pregnant, lactating cows divided into two groups were subjected to a 36 h period of either complete light or complete darkness (except for a 4 h long lit period per 24 h) with two weeks between each treatment. With glue-on electrodes on the cows heads the sleeping times and sleep stages could be recorded by means of an ambulatory EEG device. Standing and lying times were recorded by an activity meter fastened on one of the hind legs. The study showed that light seems to have little effect on the sleep in dairy cattle. Other results might have been found if the study had been going on for a longer period of time. The total time spent sleeping and drowsing were slightly higher during the day when com-pared to the night during the completely lit treatment and more time was also spent drows-ing during the day than during the night. These results are in line with previous findings on the subject. There were also no differences in the standing and lying times. Sömn är livsviktigt. Trots det är det mycket kring sömn som är okänt. Dagens mjölkkor lever ett stressigt liv, deras höga mjölkavkastning kräver ett stort födointag och långa idisslingstider. Hinner de sova tillräckligt? Vilka faktorer som påverkar mjölkkors sömnbehov är i mångt och mycket okänt. I denna studie studeras ljusets inverkan på sömntid och stå- och liggtider. Fem dräktiga mjölkkor i två grupper utsattes under 36 timmar antingen för artificiellt ljus dygnet runt (ljust) eller artificiellt ljus endast 4 timmar (mörkt) per dygn med en två veckor lång viloperiod mellan behandlingarna. Med hjälp av elektroder fastlimmade på kornas huvuden kunde sömntider och sömnstadium registreras via en EEG-mätare. Stå- och liggtider registrerades via en aktivitetsmätare fastsatt på kons ena bakben. Denna studie visade att ljus inte verkar ha någon stor effekt på mjölkkors sömn. Möjligtvis hade andra resultat uppnåtts om studien pågått under en längre tid. Vid ljus dygnet var den sammanlagda sov och dåsningstiden signifikant längre tid på dagen än på natten, och under den mörka behandlingen dåsade de signifikant längre under dagen. Dessa resultat är i linje med de få studier som tidigare är gjorda på ämnet. Det fanns inte heller några skillnader i stå- och liggtider mellan behandlingarna. SLU/Dept. of Animal Nutrition and Management (until 231231) 2012 H2 eng swe https://stud.epsilon.slu.se/5128/ |
| spellingShingle | Sleep Dairy cattle Light program EEG Andersson, Lisa The effects of two light programs on sleep in dairy cattle |
| title | The effects of two light programs on sleep in dairy cattle |
| title_full | The effects of two light programs on sleep in dairy cattle |
| title_fullStr | The effects of two light programs on sleep in dairy cattle |
| title_full_unstemmed | The effects of two light programs on sleep in dairy cattle |
| title_short | The effects of two light programs on sleep in dairy cattle |
| title_sort | effects of two light programs on sleep in dairy cattle |
| topic | Sleep Dairy cattle Light program EEG |