Detecting changes in the annual movements of terrestrial migratory species : using the first-passage time to document the spring migration of caribou
Background : Migratory species face numerous threats related to human encroachment and climate change. Several migratory populations are declining and individuals are losing their migratory behaviour. To understand how habitat loss or changes in the phenology of natural processes affect migrations,...
Published in: | Movement Ecology |
---|---|
Main Authors: | , , |
Format: | Other/Unknown Material |
Language: | English |
Published: |
BioMed Central Ltd.
2020
|
Subjects: | |
Online Access: | https://hdl.handle.net/20.500.11794/40314 https://doi.org/10.1186/s40462-014-0019-0 |
id |
ftunivlavalcorp:oai:corpus.ulaval.ca:20.500.11794/40314 |
---|---|
record_format |
openpolar |
spelling |
ftunivlavalcorp:oai:corpus.ulaval.ca:20.500.11794/40314 2024-06-23T07:56:27+00:00 Detecting changes in the annual movements of terrestrial migratory species : using the first-passage time to document the spring migration of caribou Dussault, Christian Côté, Steeve D. Le Corre, Mael René Vincent Canada (Est) 2020-09-03T14:27:28Z application/pdf https://hdl.handle.net/20.500.11794/40314 https://doi.org/10.1186/s40462-014-0019-0 eng eng BioMed Central Ltd. 2051-3933 http://hdl.handle.net/20.500.11794/40314 doi:10.1186/s40462-014-0019-0 4855333 http://purl.org/coar/access_right/c_abf2 Migratory caribou Migration First-Passage Time Signal segmentation process Movements Caribou des bois -- Migration article de recherche COAR1_1::Texte::Périodique::Revue::Contribution à un journal::Article::Article de recherche 2020 ftunivlavalcorp https://doi.org/20.500.11794/4031410.1186/s40462-014-0019-0 2024-06-10T23:42:53Z Background : Migratory species face numerous threats related to human encroachment and climate change. Several migratory populations are declining and individuals are losing their migratory behaviour. To understand how habitat loss or changes in the phenology of natural processes affect migrations, it is crucial to clearly identify the timing and the patterns of migration. We propose an objective method, based on the detection of changes in movement patterns, to identify departure and arrival dates of the migration. We tested the efficiency of our approach using simulated paths before applying it to spring migration of migratory caribou from the Rivière-George and Rivière-aux-Feuilles herds in northern Québec and Labrador. We applied the First-Passage Time analysis (FPT) to locations of 402 females collected between 1986 and 2012 to characterize their movements throughout the year. We then applied a signal segmentation process in order to segment the path of FPT values into homogeneous bouts to discriminate migration from seasonal range use. This segmentation process was used to detect the winter break and the calving ground use because spring migration is defined by the departure from the winter range and the arrival on the calving ground. Results : Segmentation of the simulated paths was successful in 96% of the cases, and had a high precision (96.4% of the locations assigned to the appropriate segment). Among the 813 winter breaks and 669 calving ground use expected to be detected on the FPT profiles, and assuming that individuals always reduced movements for each of the two periods, we detected 100% of the expected winter breaks and 89% of the expected calving ground use, and identified 648 complete spring migrations. Failures to segment winter breaks or calving ground use were related to individuals only slowing down or performing less pronounced pauses resulting in low mean FPT. Conclusion : We show that our approach, which relies only on the analysis of movement patterns, provides a suitable and ... Other/Unknown Material Rivière aux Feuilles Université Laval: CorpusUL Canada Rivière aux Feuilles ENVELOPE(-70.065,-70.065,58.784,58.784) Rivière George ENVELOPE(-66.165,-66.165,58.817,58.817) Movement Ecology 2 1 |
institution |
Open Polar |
collection |
Université Laval: CorpusUL |
op_collection_id |
ftunivlavalcorp |
language |
English |
topic |
Migratory caribou Migration First-Passage Time Signal segmentation process Movements Caribou des bois -- Migration |
spellingShingle |
Migratory caribou Migration First-Passage Time Signal segmentation process Movements Caribou des bois -- Migration Dussault, Christian Côté, Steeve D. Le Corre, Mael René Vincent Detecting changes in the annual movements of terrestrial migratory species : using the first-passage time to document the spring migration of caribou |
topic_facet |
Migratory caribou Migration First-Passage Time Signal segmentation process Movements Caribou des bois -- Migration |
description |
Background : Migratory species face numerous threats related to human encroachment and climate change. Several migratory populations are declining and individuals are losing their migratory behaviour. To understand how habitat loss or changes in the phenology of natural processes affect migrations, it is crucial to clearly identify the timing and the patterns of migration. We propose an objective method, based on the detection of changes in movement patterns, to identify departure and arrival dates of the migration. We tested the efficiency of our approach using simulated paths before applying it to spring migration of migratory caribou from the Rivière-George and Rivière-aux-Feuilles herds in northern Québec and Labrador. We applied the First-Passage Time analysis (FPT) to locations of 402 females collected between 1986 and 2012 to characterize their movements throughout the year. We then applied a signal segmentation process in order to segment the path of FPT values into homogeneous bouts to discriminate migration from seasonal range use. This segmentation process was used to detect the winter break and the calving ground use because spring migration is defined by the departure from the winter range and the arrival on the calving ground. Results : Segmentation of the simulated paths was successful in 96% of the cases, and had a high precision (96.4% of the locations assigned to the appropriate segment). Among the 813 winter breaks and 669 calving ground use expected to be detected on the FPT profiles, and assuming that individuals always reduced movements for each of the two periods, we detected 100% of the expected winter breaks and 89% of the expected calving ground use, and identified 648 complete spring migrations. Failures to segment winter breaks or calving ground use were related to individuals only slowing down or performing less pronounced pauses resulting in low mean FPT. Conclusion : We show that our approach, which relies only on the analysis of movement patterns, provides a suitable and ... |
format |
Other/Unknown Material |
author |
Dussault, Christian Côté, Steeve D. Le Corre, Mael René Vincent |
author_facet |
Dussault, Christian Côté, Steeve D. Le Corre, Mael René Vincent |
author_sort |
Dussault, Christian |
title |
Detecting changes in the annual movements of terrestrial migratory species : using the first-passage time to document the spring migration of caribou |
title_short |
Detecting changes in the annual movements of terrestrial migratory species : using the first-passage time to document the spring migration of caribou |
title_full |
Detecting changes in the annual movements of terrestrial migratory species : using the first-passage time to document the spring migration of caribou |
title_fullStr |
Detecting changes in the annual movements of terrestrial migratory species : using the first-passage time to document the spring migration of caribou |
title_full_unstemmed |
Detecting changes in the annual movements of terrestrial migratory species : using the first-passage time to document the spring migration of caribou |
title_sort |
detecting changes in the annual movements of terrestrial migratory species : using the first-passage time to document the spring migration of caribou |
publisher |
BioMed Central Ltd. |
publishDate |
2020 |
url |
https://hdl.handle.net/20.500.11794/40314 https://doi.org/10.1186/s40462-014-0019-0 |
op_coverage |
Canada (Est) |
long_lat |
ENVELOPE(-70.065,-70.065,58.784,58.784) ENVELOPE(-66.165,-66.165,58.817,58.817) |
geographic |
Canada Rivière aux Feuilles Rivière George |
geographic_facet |
Canada Rivière aux Feuilles Rivière George |
genre |
Rivière aux Feuilles |
genre_facet |
Rivière aux Feuilles |
op_relation |
2051-3933 http://hdl.handle.net/20.500.11794/40314 doi:10.1186/s40462-014-0019-0 4855333 |
op_rights |
http://purl.org/coar/access_right/c_abf2 |
op_doi |
https://doi.org/20.500.11794/4031410.1186/s40462-014-0019-0 |
container_title |
Movement Ecology |
container_volume |
2 |
container_issue |
1 |
_version_ |
1802649536505577472 |