Using satellite telemetry and aerial counts to estimate space use by grey seals around the British Isles
1. In the UK, resolving conflicts between the conservation of grey seals, the management of fish stocks and marine exploitation requires knowledge of the seals' use of space. We present a map of grey seal usage around the British Isles based on satellite telemetry data from adult animals and ha...
Published in: | Journal of Applied Ecology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2004
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Online Access: | https://research-portal.st-andrews.ac.uk/en/researchoutput/using-satellite-telemetry-and-aerial-counts-to-estimate-space-use-by-grey-seals-around-the-british-isles(5054dd35-b697-45c9-9657-137959ed3ce3).html https://doi.org/10.1111/j.0021-8901.2004.00911.x |
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ftunstandrewcris:oai:research-portal.st-andrews.ac.uk:publications/5054dd35-b697-45c9-9657-137959ed3ce3 2024-06-23T07:52:30+00:00 Using satellite telemetry and aerial counts to estimate space use by grey seals around the British Isles Matthiopoulos, Jason McConnell, Bernie J Duck, Callan David Fedak, Michael Andre 2004-06 https://research-portal.st-andrews.ac.uk/en/researchoutput/using-satellite-telemetry-and-aerial-counts-to-estimate-space-use-by-grey-seals-around-the-british-isles(5054dd35-b697-45c9-9657-137959ed3ce3).html https://doi.org/10.1111/j.0021-8901.2004.00911.x eng eng https://research-portal.st-andrews.ac.uk/en/researchoutput/using-satellite-telemetry-and-aerial-counts-to-estimate-space-use-by-grey-seals-around-the-british-isles(5054dd35-b697-45c9-9657-137959ed3ce3).html info:eu-repo/semantics/restrictedAccess Matthiopoulos , J , McConnell , B J , Duck , C D & Fedak , M A 2004 , ' Using satellite telemetry and aerial counts to estimate space use by grey seals around the British Isles ' , Journal of Applied Ecology , vol. 41 , no. 3 , pp. 476-491 . https://doi.org/10.1111/j.0021-8901.2004.00911.x Halichoerus grypus marine risk assessment model-supervised kernel smoothing (MSKS) predation pressure special areas of conservation (SAC) UK fisheries SOUTHERN ELEPHANT SEALS IDEAL FREE DISTRIBUTION HOME-RANGE ESTIMATORS FORAGING ECOLOGY GRAY SEALS SPATIAL-DISTRIBUTION ANIMAL MOVEMENTS AUSTRAL SUMMER NORTH-SEA INDEPENDENCE article 2004 ftunstandrewcris https://doi.org/10.1111/j.0021-8901.2004.00911.x 2024-06-13T00:14:39Z 1. In the UK, resolving conflicts between the conservation of grey seals, the management of fish stocks and marine exploitation requires knowledge of the seals' use of space. We present a map of grey seal usage around the British Isles based on satellite telemetry data from adult animals and haul-out survey data. 2. Our approach combined modelling and interpolation. To model the seals' association with particular coastal sites (the haul-outs), we divided the population into subpopulations associated with 24 haul-out groups. Haul-out-specific maps of accessibility were used to supervise usage estimation from satellite telemetry. The mean and variance of seal numbers at each haul-out group were obtained from haul-out counts. The aggregate map of usage for the entire population was produced by adding together the haul-out-specific usage maps, weighted by mean number of animals using that haul-out. 3. Seal usage was primarily concentrated (i) off the northern coasts of the British Isles, (ii) closer to the coast than might be expected purely on the basis of accessibility from the haul-outs and (iii) in a limited number of marine hot-spots. 4. Although our results currently represent the best estimate of how grey seals use the marine environment around Britain, they are neither definitive nor equally precise for all haul-outs. Further data collection should focus in the south-west of the British isles and aerial counts should be repeated for all haul-outs. 5. Synthesis and applications. This work provides environmental managers with current estimates of grey seal usage and describes a methodology for maximizing data efficiency. Our results could guide government departments in licensing marine exploitation by the oil industry, in estimating grey seal predation pressure on vulnerable or economically important prey and in delineating marine special areas of conservation (SAC). Our finding that grey seal usage is characterized by a limited number of hot-spots means that the species is particularly suited to localized ... Article in Journal/Newspaper Elephant Seals Southern Elephant Seals University of St Andrews: Research Portal Austral Journal of Applied Ecology 41 3 476 491 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
Halichoerus grypus marine risk assessment model-supervised kernel smoothing (MSKS) predation pressure special areas of conservation (SAC) UK fisheries SOUTHERN ELEPHANT SEALS IDEAL FREE DISTRIBUTION HOME-RANGE ESTIMATORS FORAGING ECOLOGY GRAY SEALS SPATIAL-DISTRIBUTION ANIMAL MOVEMENTS AUSTRAL SUMMER NORTH-SEA INDEPENDENCE |
spellingShingle |
Halichoerus grypus marine risk assessment model-supervised kernel smoothing (MSKS) predation pressure special areas of conservation (SAC) UK fisheries SOUTHERN ELEPHANT SEALS IDEAL FREE DISTRIBUTION HOME-RANGE ESTIMATORS FORAGING ECOLOGY GRAY SEALS SPATIAL-DISTRIBUTION ANIMAL MOVEMENTS AUSTRAL SUMMER NORTH-SEA INDEPENDENCE Matthiopoulos, Jason McConnell, Bernie J Duck, Callan David Fedak, Michael Andre Using satellite telemetry and aerial counts to estimate space use by grey seals around the British Isles |
topic_facet |
Halichoerus grypus marine risk assessment model-supervised kernel smoothing (MSKS) predation pressure special areas of conservation (SAC) UK fisheries SOUTHERN ELEPHANT SEALS IDEAL FREE DISTRIBUTION HOME-RANGE ESTIMATORS FORAGING ECOLOGY GRAY SEALS SPATIAL-DISTRIBUTION ANIMAL MOVEMENTS AUSTRAL SUMMER NORTH-SEA INDEPENDENCE |
description |
1. In the UK, resolving conflicts between the conservation of grey seals, the management of fish stocks and marine exploitation requires knowledge of the seals' use of space. We present a map of grey seal usage around the British Isles based on satellite telemetry data from adult animals and haul-out survey data. 2. Our approach combined modelling and interpolation. To model the seals' association with particular coastal sites (the haul-outs), we divided the population into subpopulations associated with 24 haul-out groups. Haul-out-specific maps of accessibility were used to supervise usage estimation from satellite telemetry. The mean and variance of seal numbers at each haul-out group were obtained from haul-out counts. The aggregate map of usage for the entire population was produced by adding together the haul-out-specific usage maps, weighted by mean number of animals using that haul-out. 3. Seal usage was primarily concentrated (i) off the northern coasts of the British Isles, (ii) closer to the coast than might be expected purely on the basis of accessibility from the haul-outs and (iii) in a limited number of marine hot-spots. 4. Although our results currently represent the best estimate of how grey seals use the marine environment around Britain, they are neither definitive nor equally precise for all haul-outs. Further data collection should focus in the south-west of the British isles and aerial counts should be repeated for all haul-outs. 5. Synthesis and applications. This work provides environmental managers with current estimates of grey seal usage and describes a methodology for maximizing data efficiency. Our results could guide government departments in licensing marine exploitation by the oil industry, in estimating grey seal predation pressure on vulnerable or economically important prey and in delineating marine special areas of conservation (SAC). Our finding that grey seal usage is characterized by a limited number of hot-spots means that the species is particularly suited to localized ... |
format |
Article in Journal/Newspaper |
author |
Matthiopoulos, Jason McConnell, Bernie J Duck, Callan David Fedak, Michael Andre |
author_facet |
Matthiopoulos, Jason McConnell, Bernie J Duck, Callan David Fedak, Michael Andre |
author_sort |
Matthiopoulos, Jason |
title |
Using satellite telemetry and aerial counts to estimate space use by grey seals around the British Isles |
title_short |
Using satellite telemetry and aerial counts to estimate space use by grey seals around the British Isles |
title_full |
Using satellite telemetry and aerial counts to estimate space use by grey seals around the British Isles |
title_fullStr |
Using satellite telemetry and aerial counts to estimate space use by grey seals around the British Isles |
title_full_unstemmed |
Using satellite telemetry and aerial counts to estimate space use by grey seals around the British Isles |
title_sort |
using satellite telemetry and aerial counts to estimate space use by grey seals around the british isles |
publishDate |
2004 |
url |
https://research-portal.st-andrews.ac.uk/en/researchoutput/using-satellite-telemetry-and-aerial-counts-to-estimate-space-use-by-grey-seals-around-the-british-isles(5054dd35-b697-45c9-9657-137959ed3ce3).html https://doi.org/10.1111/j.0021-8901.2004.00911.x |
geographic |
Austral |
geographic_facet |
Austral |
genre |
Elephant Seals Southern Elephant Seals |
genre_facet |
Elephant Seals Southern Elephant Seals |
op_source |
Matthiopoulos , J , McConnell , B J , Duck , C D & Fedak , M A 2004 , ' Using satellite telemetry and aerial counts to estimate space use by grey seals around the British Isles ' , Journal of Applied Ecology , vol. 41 , no. 3 , pp. 476-491 . https://doi.org/10.1111/j.0021-8901.2004.00911.x |
op_relation |
https://research-portal.st-andrews.ac.uk/en/researchoutput/using-satellite-telemetry-and-aerial-counts-to-estimate-space-use-by-grey-seals-around-the-british-isles(5054dd35-b697-45c9-9657-137959ed3ce3).html |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1111/j.0021-8901.2004.00911.x |
container_title |
Journal of Applied Ecology |
container_volume |
41 |
container_issue |
3 |
container_start_page |
476 |
op_container_end_page |
491 |
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1802643811515498496 |