ARCTIC Reproduction and Mortality of Finnish Semi-Domesticated Reindeer in Relation to Density and Management Strategies
ABSTRACT. We assessed the effects of management strategies during 1960-73 relative to strategies used during 1974-87 on the reproduction and mortality of 56 semidomesticated herds of Finnish reindeer (Rangifer tarandus farandus). During 1960-73, reindeer fed exclusively on natural forage growing on...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.564.5871 2023-05-15T14:19:43+02:00 ARCTIC Reproduction and Mortality of Finnish Semi-Domesticated Reindeer in Relation to Density and Management Strategies T. Hellei I. Kojola The Pennsylvania State University CiteSeerX Archives 1992 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.564.5871 http://pubs.aina.ucalgary.ca/arctic/Arctic46-1-72.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.564.5871 http://pubs.aina.ucalgary.ca/arctic/Arctic46-1-72.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pubs.aina.ucalgary.ca/arctic/Arctic46-1-72.pdf Key words reproduction mortality density dependence reindeer Rangifer tarandus management Finland text 1992 ftciteseerx 2016-06-19T00:01:16Z ABSTRACT. We assessed the effects of management strategies during 1960-73 relative to strategies used during 1974-87 on the reproduction and mortality of 56 semidomesticated herds of Finnish reindeer (Rangifer tarandus farandus). During 1960-73, reindeer fed exclusively on natural forage growing on their range, and reindeer were harvested mostly as adults. These strategies were modified starting in 1974 to include supplemental feeding in the southern part of the Finnish reindeer range and calf harvesting throughout the range. We found significantly higher calflfemale ratios, lower mortality, and less variation in both calf/female ratios and mortality during 1974-87 than during 1960-73. These changes occurred in spite of increased animal density. Coefficients of variation in calf/female ratio and mortality were negatively correlated with the prevalence of mature spruce forests, which are rich in arboreal lichens. Mean calf/female ratio and mortality rate depended on reindeer density only in the southern region during 1960-73. During 1974-87 these did not depend on density in any region. Within herds, calf/female ratio did not depend on density in most cases (98%), while in the later period the relationship between calf production and density was positive in some cases (25%). Mortality depended more often on density during the arlier (46 % of herds) than the later (23 % of herds) p e r i o d. Calf harvesting influenced mortality more than supplemental feediig and virtually freed reindeer from density-dependent limitations. Supplemental feeding was used to compensate for deterioration of range resulting from overgrazing and logging of mature forests rich in arboreal lichens. Text Arctic Arctic Rangifer tarandus Unknown Arctic Freed ENVELOPE(164.333,164.333,-71.483,-71.483) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
topic |
Key words reproduction mortality density dependence reindeer Rangifer tarandus management Finland |
spellingShingle |
Key words reproduction mortality density dependence reindeer Rangifer tarandus management Finland T. Hellei I. Kojola ARCTIC Reproduction and Mortality of Finnish Semi-Domesticated Reindeer in Relation to Density and Management Strategies |
topic_facet |
Key words reproduction mortality density dependence reindeer Rangifer tarandus management Finland |
description |
ABSTRACT. We assessed the effects of management strategies during 1960-73 relative to strategies used during 1974-87 on the reproduction and mortality of 56 semidomesticated herds of Finnish reindeer (Rangifer tarandus farandus). During 1960-73, reindeer fed exclusively on natural forage growing on their range, and reindeer were harvested mostly as adults. These strategies were modified starting in 1974 to include supplemental feeding in the southern part of the Finnish reindeer range and calf harvesting throughout the range. We found significantly higher calflfemale ratios, lower mortality, and less variation in both calf/female ratios and mortality during 1974-87 than during 1960-73. These changes occurred in spite of increased animal density. Coefficients of variation in calf/female ratio and mortality were negatively correlated with the prevalence of mature spruce forests, which are rich in arboreal lichens. Mean calf/female ratio and mortality rate depended on reindeer density only in the southern region during 1960-73. During 1974-87 these did not depend on density in any region. Within herds, calf/female ratio did not depend on density in most cases (98%), while in the later period the relationship between calf production and density was positive in some cases (25%). Mortality depended more often on density during the arlier (46 % of herds) than the later (23 % of herds) p e r i o d. Calf harvesting influenced mortality more than supplemental feediig and virtually freed reindeer from density-dependent limitations. Supplemental feeding was used to compensate for deterioration of range resulting from overgrazing and logging of mature forests rich in arboreal lichens. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
T. Hellei I. Kojola |
author_facet |
T. Hellei I. Kojola |
author_sort |
T. Hellei |
title |
ARCTIC Reproduction and Mortality of Finnish Semi-Domesticated Reindeer in Relation to Density and Management Strategies |
title_short |
ARCTIC Reproduction and Mortality of Finnish Semi-Domesticated Reindeer in Relation to Density and Management Strategies |
title_full |
ARCTIC Reproduction and Mortality of Finnish Semi-Domesticated Reindeer in Relation to Density and Management Strategies |
title_fullStr |
ARCTIC Reproduction and Mortality of Finnish Semi-Domesticated Reindeer in Relation to Density and Management Strategies |
title_full_unstemmed |
ARCTIC Reproduction and Mortality of Finnish Semi-Domesticated Reindeer in Relation to Density and Management Strategies |
title_sort |
arctic reproduction and mortality of finnish semi-domesticated reindeer in relation to density and management strategies |
publishDate |
1992 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.564.5871 http://pubs.aina.ucalgary.ca/arctic/Arctic46-1-72.pdf |
long_lat |
ENVELOPE(164.333,164.333,-71.483,-71.483) |
geographic |
Arctic Freed |
geographic_facet |
Arctic Freed |
genre |
Arctic Arctic Rangifer tarandus |
genre_facet |
Arctic Arctic Rangifer tarandus |
op_source |
http://pubs.aina.ucalgary.ca/arctic/Arctic46-1-72.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.564.5871 http://pubs.aina.ucalgary.ca/arctic/Arctic46-1-72.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766291469593739264 |