Regional differences in density-dependent mortality and reproduction in Finnish reindeer
Reindeer in the southern and central regions of reindeer husbandry in Finland feed on arboreal lichens or are given supplementary rations from midwinter whereas in the northern region reindeer use snow-covered forage throughout winter. Rates of mortality and reproduction were examined using data fro...
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Septentrio Academic Publishing
1993
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Online Access: | https://doi.org/10.7557/2.13.1.1070 https://doaj.org/article/ea28a270b2774f6eb7cb2d69ac534a7b |
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ftdoajarticles:oai:doaj.org/article:ea28a270b2774f6eb7cb2d69ac534a7b 2023-05-15T17:42:27+02:00 Regional differences in density-dependent mortality and reproduction in Finnish reindeer Ilpo Kojola Timo Helle 1993-10-01T00:00:00Z https://doi.org/10.7557/2.13.1.1070 https://doaj.org/article/ea28a270b2774f6eb7cb2d69ac534a7b EN eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/rangifer/article/view/1070 https://doaj.org/toc/1890-6729 doi:10.7557/2.13.1.1070 1890-6729 https://doaj.org/article/ea28a270b2774f6eb7cb2d69ac534a7b Rangifer, Vol 13, Iss 1 (1993) density-dependence mortality reproduction forest cutting reindeer Finland Animal culture SF1-1100 article 1993 ftdoajarticles https://doi.org/10.7557/2.13.1.1070 2022-12-31T09:34:18Z Reindeer in the southern and central regions of reindeer husbandry in Finland feed on arboreal lichens or are given supplementary rations from midwinter whereas in the northern region reindeer use snow-covered forage throughout winter. Rates of mortality and reproduction were examined using data from population crashes of semi-domesticated reindeer that occurred in Northern Finland during 1960-1987. The mortality and reproductive rate were density-dependent in the southern region and the mortality was density-dependent in the central region. The density-dependence was most probably due to food competition in forest cutting areas where reindeer gather to feed on arboreal lichens from felled trees. In the northern region mortality was not density-dependent indicating that where reindeer feed on over-utilized winter range the effects of increased feeding competition are masked by very large changes in the availability of forage. Article in Journal/Newspaper Northern Finland Rangifer reindeer husbandry Directory of Open Access Journals: DOAJ Articles Midwinter ENVELOPE(139.931,139.931,-66.690,-66.690) Rangifer 13 1 33 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
density-dependence mortality reproduction forest cutting reindeer Finland Animal culture SF1-1100 |
spellingShingle |
density-dependence mortality reproduction forest cutting reindeer Finland Animal culture SF1-1100 Ilpo Kojola Timo Helle Regional differences in density-dependent mortality and reproduction in Finnish reindeer |
topic_facet |
density-dependence mortality reproduction forest cutting reindeer Finland Animal culture SF1-1100 |
description |
Reindeer in the southern and central regions of reindeer husbandry in Finland feed on arboreal lichens or are given supplementary rations from midwinter whereas in the northern region reindeer use snow-covered forage throughout winter. Rates of mortality and reproduction were examined using data from population crashes of semi-domesticated reindeer that occurred in Northern Finland during 1960-1987. The mortality and reproductive rate were density-dependent in the southern region and the mortality was density-dependent in the central region. The density-dependence was most probably due to food competition in forest cutting areas where reindeer gather to feed on arboreal lichens from felled trees. In the northern region mortality was not density-dependent indicating that where reindeer feed on over-utilized winter range the effects of increased feeding competition are masked by very large changes in the availability of forage. |
format |
Article in Journal/Newspaper |
author |
Ilpo Kojola Timo Helle |
author_facet |
Ilpo Kojola Timo Helle |
author_sort |
Ilpo Kojola |
title |
Regional differences in density-dependent mortality and reproduction in Finnish reindeer |
title_short |
Regional differences in density-dependent mortality and reproduction in Finnish reindeer |
title_full |
Regional differences in density-dependent mortality and reproduction in Finnish reindeer |
title_fullStr |
Regional differences in density-dependent mortality and reproduction in Finnish reindeer |
title_full_unstemmed |
Regional differences in density-dependent mortality and reproduction in Finnish reindeer |
title_sort |
regional differences in density-dependent mortality and reproduction in finnish reindeer |
publisher |
Septentrio Academic Publishing |
publishDate |
1993 |
url |
https://doi.org/10.7557/2.13.1.1070 https://doaj.org/article/ea28a270b2774f6eb7cb2d69ac534a7b |
long_lat |
ENVELOPE(139.931,139.931,-66.690,-66.690) |
geographic |
Midwinter |
geographic_facet |
Midwinter |
genre |
Northern Finland Rangifer reindeer husbandry |
genre_facet |
Northern Finland Rangifer reindeer husbandry |
op_source |
Rangifer, Vol 13, Iss 1 (1993) |
op_relation |
https://septentrio.uit.no/index.php/rangifer/article/view/1070 https://doaj.org/toc/1890-6729 doi:10.7557/2.13.1.1070 1890-6729 https://doaj.org/article/ea28a270b2774f6eb7cb2d69ac534a7b |
op_doi |
https://doi.org/10.7557/2.13.1.1070 |
container_title |
Rangifer |
container_volume |
13 |
container_issue |
1 |
container_start_page |
33 |
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1766144310835675136 |