Generalizing the first-difference correlated random walk for marine animal movement data
Animal telemetry data are often analysed with discrete time movement models assuming rotation in the movement. These models are defined with equidistant distant time steps. However, telemetry data from marine animals are observed irregularly. To account for irregular data, a time-irregularised first...
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ftdatacite:10.48550/arxiv.1806.08582 2023-05-15T18:07:06+02:00 Generalizing the first-difference correlated random walk for marine animal movement data Albertsen, Christoffer Moesgaard 2018 https://dx.doi.org/10.48550/arxiv.1806.08582 https://arxiv.org/abs/1806.08582 unknown arXiv arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Quantitative Methods q-bio.QM FOS Biological sciences Preprint Article article CreativeWork 2018 ftdatacite https://doi.org/10.48550/arxiv.1806.08582 2022-04-01T09:31:59Z Animal telemetry data are often analysed with discrete time movement models assuming rotation in the movement. These models are defined with equidistant distant time steps. However, telemetry data from marine animals are observed irregularly. To account for irregular data, a time-irregularised first-difference correlated random walk model with drift is introduced. The model generalizes the commonly used first-difference correlated random walk with regular time steps by allowing irregular time steps, including a drift term, and by allowing different autocorrelation in the two coordinates. The model is applied to data from a ringed seal collected through the Argos satellite system, and is compared to related movement models through simulations. Accounting for irregular data in the movement model results in accurate parameter estimates and reconstruction of movement paths. Measured by distance, the introduced model can provide more accurate movement paths than the regular time counterpart. Extracting accurate movement paths from uncertain telemetry data is important for evaluating space use patterns for marine animals, which in turn is crucial for management. Further, handling irregular data directly in the movement model allows efficient simultaneous analysis of several animals. Report ringed seal DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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topic |
Quantitative Methods q-bio.QM FOS Biological sciences |
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Quantitative Methods q-bio.QM FOS Biological sciences Albertsen, Christoffer Moesgaard Generalizing the first-difference correlated random walk for marine animal movement data |
topic_facet |
Quantitative Methods q-bio.QM FOS Biological sciences |
description |
Animal telemetry data are often analysed with discrete time movement models assuming rotation in the movement. These models are defined with equidistant distant time steps. However, telemetry data from marine animals are observed irregularly. To account for irregular data, a time-irregularised first-difference correlated random walk model with drift is introduced. The model generalizes the commonly used first-difference correlated random walk with regular time steps by allowing irregular time steps, including a drift term, and by allowing different autocorrelation in the two coordinates. The model is applied to data from a ringed seal collected through the Argos satellite system, and is compared to related movement models through simulations. Accounting for irregular data in the movement model results in accurate parameter estimates and reconstruction of movement paths. Measured by distance, the introduced model can provide more accurate movement paths than the regular time counterpart. Extracting accurate movement paths from uncertain telemetry data is important for evaluating space use patterns for marine animals, which in turn is crucial for management. Further, handling irregular data directly in the movement model allows efficient simultaneous analysis of several animals. |
format |
Report |
author |
Albertsen, Christoffer Moesgaard |
author_facet |
Albertsen, Christoffer Moesgaard |
author_sort |
Albertsen, Christoffer Moesgaard |
title |
Generalizing the first-difference correlated random walk for marine animal movement data |
title_short |
Generalizing the first-difference correlated random walk for marine animal movement data |
title_full |
Generalizing the first-difference correlated random walk for marine animal movement data |
title_fullStr |
Generalizing the first-difference correlated random walk for marine animal movement data |
title_full_unstemmed |
Generalizing the first-difference correlated random walk for marine animal movement data |
title_sort |
generalizing the first-difference correlated random walk for marine animal movement data |
publisher |
arXiv |
publishDate |
2018 |
url |
https://dx.doi.org/10.48550/arxiv.1806.08582 https://arxiv.org/abs/1806.08582 |
genre |
ringed seal |
genre_facet |
ringed seal |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1806.08582 |
_version_ |
1766179023377924096 |