The intensity of horizontal and vertical search in a diving forager the harbour seal
- Free ranging foraging animals can vary their searching intensity in response to the profitability of the environment by modifying their movements. Marine diving animals forage in a three dimensional space and searching intensity can be varied in both the horizontal and vertical planes. Therefore u...
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Language: | English |
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2015
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Online Access: | http://hdl.handle.net/11250/2372314 https://doi.org/10.1186/s40462-015-0042-9 |
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ftimr:oai:imr.brage.unit.no:11250/2372314 2023-05-15T16:33:35+02:00 The intensity of horizontal and vertical search in a diving forager the harbour seal Ramasco, Virginie Barraquand, Frédéric Biuw, Martin McConnell, Bernie J. Nilssen, Kjell Tormod 2015-12-03T13:26:08Z application/pdf http://hdl.handle.net/11250/2372314 https://doi.org/10.1186/s40462-015-0042-9 eng eng BioMed Central Movement Ecology 2015, 3(15):1-16 urn:issn:2051-3933 http://hdl.handle.net/11250/2372314 https://doi.org/10.1186/s40462-015-0042-9 cristin:1296649 Navngivelse 3.0 Norge http://creativecommons.org/licenses/by/3.0/no/ CC-BY 16 3 Movement ecology VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 Journal article Peer reviewed 2015 ftimr https://doi.org/10.1186/s40462-015-0042-9 2021-09-23T20:14:30Z - Free ranging foraging animals can vary their searching intensity in response to the profitability of the environment by modifying their movements. Marine diving animals forage in a three dimensional space and searching intensity can be varied in both the horizontal and vertical planes. Therefore understanding the relationship between the allocation of searching effort in these two spaces can provide a better understanding of searching strategies and a more robust identification of foraging behaviour from the multitude of foraging indices (FIs) available. We investigated the movement of a widespread marine coastal predator, the harbour seal (Phoca vitulina), and compared two sets of foraging indices reflecting searching intensity respectively in the horizontal plane (displacement speed, extensive vs. intensive movement types, residence time) and in the vertical dimension (time at the bottom of a dive). We then tested how several factors (dive depth, direction of the trip with respect to haul-out site, different predatory tactics, the presence of factors confounding the detection of foraging, and temporal resolution of the data) affected their relationships. Article in Journal/Newspaper harbour seal Phoca vitulina Institute for Marine Research: Brage IMR Movement Ecology 3 1 |
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Open Polar |
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Institute for Marine Research: Brage IMR |
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ftimr |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 |
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VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 Ramasco, Virginie Barraquand, Frédéric Biuw, Martin McConnell, Bernie J. Nilssen, Kjell Tormod The intensity of horizontal and vertical search in a diving forager the harbour seal |
topic_facet |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 |
description |
- Free ranging foraging animals can vary their searching intensity in response to the profitability of the environment by modifying their movements. Marine diving animals forage in a three dimensional space and searching intensity can be varied in both the horizontal and vertical planes. Therefore understanding the relationship between the allocation of searching effort in these two spaces can provide a better understanding of searching strategies and a more robust identification of foraging behaviour from the multitude of foraging indices (FIs) available. We investigated the movement of a widespread marine coastal predator, the harbour seal (Phoca vitulina), and compared two sets of foraging indices reflecting searching intensity respectively in the horizontal plane (displacement speed, extensive vs. intensive movement types, residence time) and in the vertical dimension (time at the bottom of a dive). We then tested how several factors (dive depth, direction of the trip with respect to haul-out site, different predatory tactics, the presence of factors confounding the detection of foraging, and temporal resolution of the data) affected their relationships. |
format |
Article in Journal/Newspaper |
author |
Ramasco, Virginie Barraquand, Frédéric Biuw, Martin McConnell, Bernie J. Nilssen, Kjell Tormod |
author_facet |
Ramasco, Virginie Barraquand, Frédéric Biuw, Martin McConnell, Bernie J. Nilssen, Kjell Tormod |
author_sort |
Ramasco, Virginie |
title |
The intensity of horizontal and vertical search in a diving forager the harbour seal |
title_short |
The intensity of horizontal and vertical search in a diving forager the harbour seal |
title_full |
The intensity of horizontal and vertical search in a diving forager the harbour seal |
title_fullStr |
The intensity of horizontal and vertical search in a diving forager the harbour seal |
title_full_unstemmed |
The intensity of horizontal and vertical search in a diving forager the harbour seal |
title_sort |
intensity of horizontal and vertical search in a diving forager the harbour seal |
publisher |
BioMed Central |
publishDate |
2015 |
url |
http://hdl.handle.net/11250/2372314 https://doi.org/10.1186/s40462-015-0042-9 |
genre |
harbour seal Phoca vitulina |
genre_facet |
harbour seal Phoca vitulina |
op_source |
16 3 Movement ecology |
op_relation |
Movement Ecology 2015, 3(15):1-16 urn:issn:2051-3933 http://hdl.handle.net/11250/2372314 https://doi.org/10.1186/s40462-015-0042-9 cristin:1296649 |
op_rights |
Navngivelse 3.0 Norge http://creativecommons.org/licenses/by/3.0/no/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1186/s40462-015-0042-9 |
container_title |
Movement Ecology |
container_volume |
3 |
container_issue |
1 |
_version_ |
1766023267949215744 |