Gut retention time in captive brown bears Ursus arctos
Knowing animals' gut retention time (GRT) for important food items is critical when using non‐invasive studies based on faecal remains, e.g. when analysing nutritive quality of food, or relating diet or behaviour to movements. We analysed GRT in six captive brown bears Ursus arctos , after feed...
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crwiley:10.2981/12-121 2024-04-28T08:36:54+00:00 Gut retention time in captive brown bears Ursus arctos Elfström, Marcus St⊘en, Ole‐Gunnar Zedrosser, Andreas Warrington, Ian Swenson, Jon E. 2013 http://dx.doi.org/10.2981/12-121 https://onlinelibrary.wiley.com/doi/pdf/10.2981/12-121 https://onlinelibrary.wiley.com/doi/full-xml/10.2981/12-121 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Wildlife Biology volume 19, issue 3, page 317-324 ISSN 1903-220X 1903-220X Management, Monitoring, Policy and Law Nature and Landscape Conservation Ecology, Evolution, Behavior and Systematics journal-article 2013 crwiley https://doi.org/10.2981/12-121 2024-04-02T08:43:49Z Knowing animals' gut retention time (GRT) for important food items is critical when using non‐invasive studies based on faecal remains, e.g. when analysing nutritive quality of food, or relating diet or behaviour to movements. We analysed GRT in six captive brown bears Ursus arctos , after feeding on either berries (a mixture of bilberry Vaccinium myrtillus and lingonberry V. vitis‐idaea ) or animal carcasses (either reindeer Rangifer tarandus, European rabbit Oryctolagus cuniculus, domestic pig Sus scrofa domestica, cattle Bos taurus or horse Equus ferus caballus ). Median GRT 50% (i.e. when 50% of all faeces containing experimental food had been defecated) was 5 hours and 47 minutes (1st and 3rd quartiles = 4 hours and 36 minutes and 7 hours and 3 minutes; N = 20) after feeding on berries and 14 hours and 30 minutes (1st and 3rd quartiles = 10 hours and 9 minutes and 16 hours and 57 minutes; N = 20) after feeding on carcasses. Median GRT min (i.e. first defecation comprised of experimental food) was 3 hours and 5 minutes (1st and 3rd quartiles = 1 hour and 51 minutes and 4 hours and 12 minutes; N = 21) for berries and 8 hours and 2 minutes (1st and 3rd quartiles = 6 hours and 14 minutes and 10 hours and 44 minutes; N = 20) for carcasses. Median GRT max (i.e. last defecation comprised of experimental food) was 15 hours and 27 minutes (1st and 3rd quartiles = 11 hours and 36 minutes and 17 hours and 16 minutes; N = 21) for berries and 16 hours and 16 minutes (1st and 3rd quartiles = 12 hours and 11 minutes and 17 hours and 27 minutes; N = 20) for carcasses. A carcass diet had 6 hours and 26 minutes ± 1 hour and 56 minutes (SE) longer GRT 50% than a berry diet (N = 39), despite low variation in food intake. Activity level, feeding time (midday/midnight), sex, age (subadult/adult), ingested amounts of food, prior food remains processed by the gut (i.e. cumulative faeces weight) and defecation rate did not influence the GRT 50% . Our reported GRT estimates are reliable values to be used within research and ... Article in Journal/Newspaper Rangifer tarandus Ursus arctos Wiley Online Library Wildlife Biology 19 3 317 324 |
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Wiley Online Library |
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English |
topic |
Management, Monitoring, Policy and Law Nature and Landscape Conservation Ecology, Evolution, Behavior and Systematics |
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Management, Monitoring, Policy and Law Nature and Landscape Conservation Ecology, Evolution, Behavior and Systematics Elfström, Marcus St⊘en, Ole‐Gunnar Zedrosser, Andreas Warrington, Ian Swenson, Jon E. Gut retention time in captive brown bears Ursus arctos |
topic_facet |
Management, Monitoring, Policy and Law Nature and Landscape Conservation Ecology, Evolution, Behavior and Systematics |
description |
Knowing animals' gut retention time (GRT) for important food items is critical when using non‐invasive studies based on faecal remains, e.g. when analysing nutritive quality of food, or relating diet or behaviour to movements. We analysed GRT in six captive brown bears Ursus arctos , after feeding on either berries (a mixture of bilberry Vaccinium myrtillus and lingonberry V. vitis‐idaea ) or animal carcasses (either reindeer Rangifer tarandus, European rabbit Oryctolagus cuniculus, domestic pig Sus scrofa domestica, cattle Bos taurus or horse Equus ferus caballus ). Median GRT 50% (i.e. when 50% of all faeces containing experimental food had been defecated) was 5 hours and 47 minutes (1st and 3rd quartiles = 4 hours and 36 minutes and 7 hours and 3 minutes; N = 20) after feeding on berries and 14 hours and 30 minutes (1st and 3rd quartiles = 10 hours and 9 minutes and 16 hours and 57 minutes; N = 20) after feeding on carcasses. Median GRT min (i.e. first defecation comprised of experimental food) was 3 hours and 5 minutes (1st and 3rd quartiles = 1 hour and 51 minutes and 4 hours and 12 minutes; N = 21) for berries and 8 hours and 2 minutes (1st and 3rd quartiles = 6 hours and 14 minutes and 10 hours and 44 minutes; N = 20) for carcasses. Median GRT max (i.e. last defecation comprised of experimental food) was 15 hours and 27 minutes (1st and 3rd quartiles = 11 hours and 36 minutes and 17 hours and 16 minutes; N = 21) for berries and 16 hours and 16 minutes (1st and 3rd quartiles = 12 hours and 11 minutes and 17 hours and 27 minutes; N = 20) for carcasses. A carcass diet had 6 hours and 26 minutes ± 1 hour and 56 minutes (SE) longer GRT 50% than a berry diet (N = 39), despite low variation in food intake. Activity level, feeding time (midday/midnight), sex, age (subadult/adult), ingested amounts of food, prior food remains processed by the gut (i.e. cumulative faeces weight) and defecation rate did not influence the GRT 50% . Our reported GRT estimates are reliable values to be used within research and ... |
format |
Article in Journal/Newspaper |
author |
Elfström, Marcus St⊘en, Ole‐Gunnar Zedrosser, Andreas Warrington, Ian Swenson, Jon E. |
author_facet |
Elfström, Marcus St⊘en, Ole‐Gunnar Zedrosser, Andreas Warrington, Ian Swenson, Jon E. |
author_sort |
Elfström, Marcus |
title |
Gut retention time in captive brown bears Ursus arctos |
title_short |
Gut retention time in captive brown bears Ursus arctos |
title_full |
Gut retention time in captive brown bears Ursus arctos |
title_fullStr |
Gut retention time in captive brown bears Ursus arctos |
title_full_unstemmed |
Gut retention time in captive brown bears Ursus arctos |
title_sort |
gut retention time in captive brown bears ursus arctos |
publisher |
Wiley |
publishDate |
2013 |
url |
http://dx.doi.org/10.2981/12-121 https://onlinelibrary.wiley.com/doi/pdf/10.2981/12-121 https://onlinelibrary.wiley.com/doi/full-xml/10.2981/12-121 |
genre |
Rangifer tarandus Ursus arctos |
genre_facet |
Rangifer tarandus Ursus arctos |
op_source |
Wildlife Biology volume 19, issue 3, page 317-324 ISSN 1903-220X 1903-220X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.2981/12-121 |
container_title |
Wildlife Biology |
container_volume |
19 |
container_issue |
3 |
container_start_page |
317 |
op_container_end_page |
324 |
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1797568482391359488 |