Long-Term Changes in Demography and Migration of Newfoundland Caribou
Long-term studies of demography and movements are rare but critical to understanding long-lived mobile mammals like caribou ( Rangifer tarandus ). We studied changes in the abundance, vital rates, body size, and timing of migration of the Buchans Plateau caribou herd in Newfoundland, Canada. From th...
Main Authors: | , |
---|---|
Format: | Text |
Language: | English |
Published: |
Oxford University Press
2002
|
Subjects: | |
Online Access: | http://jmammal.oxfordjournals.org/cgi/content/short/83/4/957 https://doi.org/10.1644/1545-1542(2002)083<0957:LTCIDA>2.0.CO;2 |
id |
fthighwire:oai:open-archive.highwire.org:jmammal:83/4/957 |
---|---|
record_format |
openpolar |
spelling |
fthighwire:oai:open-archive.highwire.org:jmammal:83/4/957 2023-05-15T17:20:22+02:00 Long-Term Changes in Demography and Migration of Newfoundland Caribou Mahoney, Shane P. Schaefer, James A. 2002-11-01 00:00:00.0 text/html http://jmammal.oxfordjournals.org/cgi/content/short/83/4/957 https://doi.org/10.1644/1545-1542(2002)083<0957:LTCIDA>2.0.CO;2 en eng Oxford University Press http://jmammal.oxfordjournals.org/cgi/content/short/83/4/957 http://dx.doi.org/10.1644/1545-1542(2002)083<0957:LTCIDA>2.0.CO;2 Copyright (C) 2002, Oxford University Press Feature Articles TEXT 2002 fthighwire https://doi.org/10.1644/1545-1542(2002)083<0957:LTCIDA>2.0.CO;2 2018-04-07T06:27:06Z Long-term studies of demography and movements are rare but critical to understanding long-lived mobile mammals like caribou ( Rangifer tarandus ). We studied changes in the abundance, vital rates, body size, and timing of migration of the Buchans Plateau caribou herd in Newfoundland, Canada. From the early 1960s to 2000, the population grew at 6.5%/year, although survival and recruitment indicated a declining growth rate (1.4%) by the late 1990s. The numerical increase was negatively associated with other population attributes. Rates of parturition, survival to 6 months of age, and recruitment diminished significantly. Adults exhibited substantial decreases in body size. Spring migration was significantly later and autumn migration significantly earlier. We surmise that these responses may reflect heightened density-dependent competition for summer forage. Text Newfoundland Rangifer tarandus HighWire Press (Stanford University) Canada |
institution |
Open Polar |
collection |
HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
Feature Articles |
spellingShingle |
Feature Articles Mahoney, Shane P. Schaefer, James A. Long-Term Changes in Demography and Migration of Newfoundland Caribou |
topic_facet |
Feature Articles |
description |
Long-term studies of demography and movements are rare but critical to understanding long-lived mobile mammals like caribou ( Rangifer tarandus ). We studied changes in the abundance, vital rates, body size, and timing of migration of the Buchans Plateau caribou herd in Newfoundland, Canada. From the early 1960s to 2000, the population grew at 6.5%/year, although survival and recruitment indicated a declining growth rate (1.4%) by the late 1990s. The numerical increase was negatively associated with other population attributes. Rates of parturition, survival to 6 months of age, and recruitment diminished significantly. Adults exhibited substantial decreases in body size. Spring migration was significantly later and autumn migration significantly earlier. We surmise that these responses may reflect heightened density-dependent competition for summer forage. |
format |
Text |
author |
Mahoney, Shane P. Schaefer, James A. |
author_facet |
Mahoney, Shane P. Schaefer, James A. |
author_sort |
Mahoney, Shane P. |
title |
Long-Term Changes in Demography and Migration of Newfoundland Caribou |
title_short |
Long-Term Changes in Demography and Migration of Newfoundland Caribou |
title_full |
Long-Term Changes in Demography and Migration of Newfoundland Caribou |
title_fullStr |
Long-Term Changes in Demography and Migration of Newfoundland Caribou |
title_full_unstemmed |
Long-Term Changes in Demography and Migration of Newfoundland Caribou |
title_sort |
long-term changes in demography and migration of newfoundland caribou |
publisher |
Oxford University Press |
publishDate |
2002 |
url |
http://jmammal.oxfordjournals.org/cgi/content/short/83/4/957 https://doi.org/10.1644/1545-1542(2002)083<0957:LTCIDA>2.0.CO;2 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Newfoundland Rangifer tarandus |
genre_facet |
Newfoundland Rangifer tarandus |
op_relation |
http://jmammal.oxfordjournals.org/cgi/content/short/83/4/957 http://dx.doi.org/10.1644/1545-1542(2002)083<0957:LTCIDA>2.0.CO;2 |
op_rights |
Copyright (C) 2002, Oxford University Press |
op_doi |
https://doi.org/10.1644/1545-1542(2002)083<0957:LTCIDA>2.0.CO;2 |
_version_ |
1766099219509149696 |