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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Septentrio Academic Publishing
2000
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Online Access: | https://doi.org/10.7557/2.20.5.1637 https://doaj.org/article/6bb01fc597ad4f7baf1b7dbbe398fe87 |
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ftdoajarticles:oai:doaj.org/article:6bb01fc597ad4f7baf1b7dbbe398fe87 2023-05-15T15:37:37+02:00 Overwinter changes in urea nitrogen:creatinine and cortisol:creatinine ratios in urine from Banks Island Peary caribou Nicholas C. Larter John A. Nagy 2000-04-01T00:00:00Z https://doi.org/10.7557/2.20.5.1637 https://doaj.org/article/6bb01fc597ad4f7baf1b7dbbe398fe87 EN eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/rangifer/article/view/1637 https://doaj.org/toc/1890-6729 doi:10.7557/2.20.5.1637 1890-6729 https://doaj.org/article/6bb01fc597ad4f7baf1b7dbbe398fe87 Rangifer, Vol 20, Iss 5 (2000) caribou Banks Island Peary caribou Rangifer tarandus pearyi snow urine analysis Animal culture SF1-1100 article 2000 ftdoajarticles https://doi.org/10.7557/2.20.5.1637 2022-12-31T13:28:41Z 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 caribou Rangifer Rangifer tarandus Directory of Open Access Journals: DOAJ Articles Peary ENVELOPE(-63.867,-63.867,-65.250,-65.250) Caribou Range ENVELOPE(-125.436,-125.436,59.750,59.750) Rangifer 20 5 125 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
caribou Banks Island Peary caribou Rangifer tarandus pearyi snow urine analysis Animal culture SF1-1100 |
spellingShingle |
caribou Banks Island Peary caribou Rangifer tarandus pearyi snow urine analysis Animal culture SF1-1100 Nicholas C. Larter John A. Nagy 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 Animal culture SF1-1100 |
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 |
Nicholas C. Larter John A. Nagy |
author_facet |
Nicholas C. Larter John A. Nagy |
author_sort |
Nicholas C. Larter |
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://doi.org/10.7557/2.20.5.1637 https://doaj.org/article/6bb01fc597ad4f7baf1b7dbbe398fe87 |
long_lat |
ENVELOPE(-63.867,-63.867,-65.250,-65.250) ENVELOPE(-125.436,-125.436,59.750,59.750) |
geographic |
Peary Caribou Range |
geographic_facet |
Peary Caribou Range |
genre |
Banks Island caribou Rangifer Rangifer tarandus |
genre_facet |
Banks Island caribou Rangifer Rangifer tarandus |
op_source |
Rangifer, Vol 20, Iss 5 (2000) |
op_relation |
https://septentrio.uit.no/index.php/rangifer/article/view/1637 https://doaj.org/toc/1890-6729 doi:10.7557/2.20.5.1637 1890-6729 https://doaj.org/article/6bb01fc597ad4f7baf1b7dbbe398fe87 |
op_doi |
https://doi.org/10.7557/2.20.5.1637 |
container_title |
Rangifer |
container_volume |
20 |
container_issue |
5 |
container_start_page |
125 |
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1766368265387376640 |