Overwinter changes in urea nitrogen:creatinine and cortisol:creatinine ratios in urine from Banks Island Peary caribou
Over 200 snow urine samples were collected from Banks Island Peary caribou between March 1993 and May 1998. Most (n = 146) samples were collected during 3 time periods in 5 successive years: early winter (3 November-3 December), mid-winter (9 February-1 March), and late-winter (23 April-2 May). We d...
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Language: | English |
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Septentrio Academic Publishing
2000
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Online Access: | https://septentrio.uit.no/index.php/rangifer/article/view/1637 https://doi.org/10.7557/2.20.5.1637 |
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ftunitroemsoe:oai:ojs.henry.ub.uit.no:article/1637 2023-05-15T15:37:37+02:00 Overwinter changes in urea nitrogen:creatinine and cortisol:creatinine ratios in urine from Banks Island Peary caribou Larter, Nicholas C. Nagy, John A. 2000-04-01 application/pdf https://septentrio.uit.no/index.php/rangifer/article/view/1637 https://doi.org/10.7557/2.20.5.1637 eng eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/rangifer/article/view/1637/1536 https://septentrio.uit.no/index.php/rangifer/article/view/1637 doi:10.7557/2.20.5.1637 Copyright (c) 2015 Nicholas C. Larter, John A. Nagy http://creativecommons.org/licenses/by/3.0/ CC-BY Rangifer; Vol 20 (2000): Special Issue No. 12; 125-132 1890-6729 caribou Banks Island Peary caribou Rangifer tarandus pearyi snow urine analysis info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2000 ftunitroemsoe https://doi.org/10.7557/2.20.5.1637 2021-08-16T15:03:24Z Over 200 snow urine samples were collected from Banks Island Peary caribou between March 1993 and May 1998. Most (n = 146) samples were collected during 3 time periods in 5 successive years: early winter (3 November-3 December), mid-winter (9 February-1 March), and late-winter (23 April-2 May). We determined the ratios of urea nitrogen:creatinine (U:C) and cortisol:creatinine (C:C) for each sample. U:C ratios had significant year, time, and year x time interaction effects. Mid-winter ratios were higher than early or late-winter ratios. U:C ratios ranged from 0.53 to 19.05 mg/mg, and were lowest in 1997-98. Five calf caribou sacrificed in February 1994 had significantly (P<0.02) higher U:C ratios than other caribou in mid-winter. Three adult male and 2 calf caribou sacrificed in November 1993 had U:C ratios similar to other caribou in early winter. Sacrificed caribou were in similar condition to animals that have been harvested for subsistent use in other years, not overly fat nor in an advanced state of starvation. U:C ratios for Peary caribou range from 10 to ca. 100-fold higher than those reported for barren-ground caribou; ratios > 60-fold higher than those indicative of prolonged undernutrition in barren-ground caribou were common. This difference is likely because the winter diet of Peary caribou has a higher crude protein content than that of barren-ground caribou. C:C ratios had significant year and year x time interaction effects, and were highest in 1996-97 and 1997-98. C:C ratios of sacrificed caribou were similar to those of other animals during early and mid-winter. C:C ratios for Peary caribou ranged from 0.0120 ug/mg to 0.2678 ug/mg; ratios indicative of morbidity in mule deer were common. C:C and U:C ratios from the same individuals were not correlated (R = -0.073). Monitoring U:C ratios of Banks Island Peary caribou may provide useful management information. Article in Journal/Newspaper Banks Island Rangifer Rangifer tarandus University of Tromsø: Septentrio Academic Publishing Caribou Range ENVELOPE(-125.436,-125.436,59.750,59.750) Peary ENVELOPE(-63.867,-63.867,-65.250,-65.250) Rangifer 20 5 125 |
institution |
Open Polar |
collection |
University of Tromsø: Septentrio Academic Publishing |
op_collection_id |
ftunitroemsoe |
language |
English |
topic |
caribou Banks Island Peary caribou Rangifer tarandus pearyi snow urine analysis |
spellingShingle |
caribou Banks Island Peary caribou Rangifer tarandus pearyi snow urine analysis Larter, Nicholas C. Nagy, John A. Overwinter changes in urea nitrogen:creatinine and cortisol:creatinine ratios in urine from Banks Island Peary caribou |
topic_facet |
caribou Banks Island Peary caribou Rangifer tarandus pearyi snow urine analysis |
description |
Over 200 snow urine samples were collected from Banks Island Peary caribou between March 1993 and May 1998. Most (n = 146) samples were collected during 3 time periods in 5 successive years: early winter (3 November-3 December), mid-winter (9 February-1 March), and late-winter (23 April-2 May). We determined the ratios of urea nitrogen:creatinine (U:C) and cortisol:creatinine (C:C) for each sample. U:C ratios had significant year, time, and year x time interaction effects. Mid-winter ratios were higher than early or late-winter ratios. U:C ratios ranged from 0.53 to 19.05 mg/mg, and were lowest in 1997-98. Five calf caribou sacrificed in February 1994 had significantly (P<0.02) higher U:C ratios than other caribou in mid-winter. Three adult male and 2 calf caribou sacrificed in November 1993 had U:C ratios similar to other caribou in early winter. Sacrificed caribou were in similar condition to animals that have been harvested for subsistent use in other years, not overly fat nor in an advanced state of starvation. U:C ratios for Peary caribou range from 10 to ca. 100-fold higher than those reported for barren-ground caribou; ratios > 60-fold higher than those indicative of prolonged undernutrition in barren-ground caribou were common. This difference is likely because the winter diet of Peary caribou has a higher crude protein content than that of barren-ground caribou. C:C ratios had significant year and year x time interaction effects, and were highest in 1996-97 and 1997-98. C:C ratios of sacrificed caribou were similar to those of other animals during early and mid-winter. C:C ratios for Peary caribou ranged from 0.0120 ug/mg to 0.2678 ug/mg; ratios indicative of morbidity in mule deer were common. C:C and U:C ratios from the same individuals were not correlated (R = -0.073). Monitoring U:C ratios of Banks Island Peary caribou may provide useful management information. |
format |
Article in Journal/Newspaper |
author |
Larter, Nicholas C. Nagy, John A. |
author_facet |
Larter, Nicholas C. Nagy, John A. |
author_sort |
Larter, Nicholas C. |
title |
Overwinter changes in urea nitrogen:creatinine and cortisol:creatinine ratios in urine from Banks Island Peary caribou |
title_short |
Overwinter changes in urea nitrogen:creatinine and cortisol:creatinine ratios in urine from Banks Island Peary caribou |
title_full |
Overwinter changes in urea nitrogen:creatinine and cortisol:creatinine ratios in urine from Banks Island Peary caribou |
title_fullStr |
Overwinter changes in urea nitrogen:creatinine and cortisol:creatinine ratios in urine from Banks Island Peary caribou |
title_full_unstemmed |
Overwinter changes in urea nitrogen:creatinine and cortisol:creatinine ratios in urine from Banks Island Peary caribou |
title_sort |
overwinter changes in urea nitrogen:creatinine and cortisol:creatinine ratios in urine from banks island peary caribou |
publisher |
Septentrio Academic Publishing |
publishDate |
2000 |
url |
https://septentrio.uit.no/index.php/rangifer/article/view/1637 https://doi.org/10.7557/2.20.5.1637 |
long_lat |
ENVELOPE(-125.436,-125.436,59.750,59.750) ENVELOPE(-63.867,-63.867,-65.250,-65.250) |
geographic |
Caribou Range Peary |
geographic_facet |
Caribou Range Peary |
genre |
Banks Island Rangifer Rangifer tarandus |
genre_facet |
Banks Island Rangifer Rangifer tarandus |
op_source |
Rangifer; Vol 20 (2000): Special Issue No. 12; 125-132 1890-6729 |
op_relation |
https://septentrio.uit.no/index.php/rangifer/article/view/1637/1536 https://septentrio.uit.no/index.php/rangifer/article/view/1637 doi:10.7557/2.20.5.1637 |
op_rights |
Copyright (c) 2015 Nicholas C. Larter, John A. Nagy http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.7557/2.20.5.1637 |
container_title |
Rangifer |
container_volume |
20 |
container_issue |
5 |
container_start_page |
125 |
_version_ |
1766368263315390464 |