Monitoring seabirds population in marine ecosystem: The use of strip-transect aerial surveys
International audience In the case of marine systems, monitoring seabird populations at sea require adequate, low cost protocols that maximize data resolution, accuracy and survey effort. This paper examines bias associated with pelagic aerial strip-transects, an easily designed and low cost survey...
Published in: | Remote Sensing of Environment |
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Online Access: | https://doi.org/10.1016/j.rse.2008.01.019 https://hal.archives-ouvertes.fr/hal-00323809 |
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fttriple:oai:gotriple.eu:10670/1.vw9il4 2023-05-15T17:41:45+02:00 Monitoring seabirds population in marine ecosystem: The use of strip-transect aerial surveys Certain, Grégoire Bretagnolle, Vincent Laboratoire de biologie et environnement marins - LBEM (LBEML) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS) Centre d'études biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) 2008-09-22 https://doi.org/10.1016/j.rse.2008.01.019 https://hal.archives-ouvertes.fr/hal-00323809 en eng HAL CCSD Elsevier hal-00323809 doi:10.1016/j.rse.2008.01.019 10670/1.vw9il4 https://hal.archives-ouvertes.fr/hal-00323809 undefined Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0034-4257 EISSN: 1879-0704 Remote Sensing of Environment Remote Sensing of Environment, Elsevier, 2008, 112, pp.3314-3322. ⟨10.1016/j.rse.2008.01.019⟩ Aerial survey Biodiversity Monitoring Open sea areas Seabirds Strip-transect Visibility bias envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2008 fttriple https://doi.org/10.1016/j.rse.2008.01.019 2023-01-22T18:22:22Z International audience In the case of marine systems, monitoring seabird populations at sea require adequate, low cost protocols that maximize data resolution, accuracy and survey effort. This paper examines bias associated with pelagic aerial strip-transects, an easily designed and low cost survey method, to validate its use for monitoring and mapping seabird populations at sea at a very large scale. We used data collected on the entire seabird community between October 2001 and March 2002 in the Bay of Biscay (100 000 km2 on the French Atlantic coast, Northeast Atlantic) to determine whether aerial strip-transect seabird survey were subject to temporal (i.e. variations of detection probability during the survey) or distance (i.e. variations of detection probability across the strip) bias. To detect these biases, two seabird taxa were contrasted, the highly conspicuous northern gannet versus three cryptic species of auks pooled as one taxonomic group. We reported that the only temporal bias was attributable to sun glare. By contrast, distance bias did not occur in a strip of 150 m for both species, and the effect of distance up to 230 mwas very weak.We conclude that visibility bias have a limited effect on pelagic aerial surveys for most seabird species. Particular attention should be paid to the constant record of sun glare, while altitude and speed can be fixed in a relatively wide range (140–180 m, 150–200 km/h) without affecting detection probability. Since distance bias did not occur across a 150 m strip, there is no need to add complexity to survey protocol by using line-transect method. This method takes distance effects into account but requires distance estimates between the bird and the transect line for every sightings. These estimates are usually easily collected in the case of marine mammals but become problematic in the case of flying animals such seabirds, sometimes encountered in very high density and aggregated into groups of several hundred individuals. Article in Journal/Newspaper Northeast Atlantic Unknown Remote Sensing of Environment 112 8 3314 3322 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
Aerial survey Biodiversity Monitoring Open sea areas Seabirds Strip-transect Visibility bias envir geo |
spellingShingle |
Aerial survey Biodiversity Monitoring Open sea areas Seabirds Strip-transect Visibility bias envir geo Certain, Grégoire Bretagnolle, Vincent Monitoring seabirds population in marine ecosystem: The use of strip-transect aerial surveys |
topic_facet |
Aerial survey Biodiversity Monitoring Open sea areas Seabirds Strip-transect Visibility bias envir geo |
description |
International audience In the case of marine systems, monitoring seabird populations at sea require adequate, low cost protocols that maximize data resolution, accuracy and survey effort. This paper examines bias associated with pelagic aerial strip-transects, an easily designed and low cost survey method, to validate its use for monitoring and mapping seabird populations at sea at a very large scale. We used data collected on the entire seabird community between October 2001 and March 2002 in the Bay of Biscay (100 000 km2 on the French Atlantic coast, Northeast Atlantic) to determine whether aerial strip-transect seabird survey were subject to temporal (i.e. variations of detection probability during the survey) or distance (i.e. variations of detection probability across the strip) bias. To detect these biases, two seabird taxa were contrasted, the highly conspicuous northern gannet versus three cryptic species of auks pooled as one taxonomic group. We reported that the only temporal bias was attributable to sun glare. By contrast, distance bias did not occur in a strip of 150 m for both species, and the effect of distance up to 230 mwas very weak.We conclude that visibility bias have a limited effect on pelagic aerial surveys for most seabird species. Particular attention should be paid to the constant record of sun glare, while altitude and speed can be fixed in a relatively wide range (140–180 m, 150–200 km/h) without affecting detection probability. Since distance bias did not occur across a 150 m strip, there is no need to add complexity to survey protocol by using line-transect method. This method takes distance effects into account but requires distance estimates between the bird and the transect line for every sightings. These estimates are usually easily collected in the case of marine mammals but become problematic in the case of flying animals such seabirds, sometimes encountered in very high density and aggregated into groups of several hundred individuals. |
author2 |
Laboratoire de biologie et environnement marins - LBEM (LBEML) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS) Centre d'études biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Certain, Grégoire Bretagnolle, Vincent |
author_facet |
Certain, Grégoire Bretagnolle, Vincent |
author_sort |
Certain, Grégoire |
title |
Monitoring seabirds population in marine ecosystem: The use of strip-transect aerial surveys |
title_short |
Monitoring seabirds population in marine ecosystem: The use of strip-transect aerial surveys |
title_full |
Monitoring seabirds population in marine ecosystem: The use of strip-transect aerial surveys |
title_fullStr |
Monitoring seabirds population in marine ecosystem: The use of strip-transect aerial surveys |
title_full_unstemmed |
Monitoring seabirds population in marine ecosystem: The use of strip-transect aerial surveys |
title_sort |
monitoring seabirds population in marine ecosystem: the use of strip-transect aerial surveys |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://doi.org/10.1016/j.rse.2008.01.019 https://hal.archives-ouvertes.fr/hal-00323809 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0034-4257 EISSN: 1879-0704 Remote Sensing of Environment Remote Sensing of Environment, Elsevier, 2008, 112, pp.3314-3322. ⟨10.1016/j.rse.2008.01.019⟩ |
op_relation |
hal-00323809 doi:10.1016/j.rse.2008.01.019 10670/1.vw9il4 https://hal.archives-ouvertes.fr/hal-00323809 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1016/j.rse.2008.01.019 |
container_title |
Remote Sensing of Environment |
container_volume |
112 |
container_issue |
8 |
container_start_page |
3314 |
op_container_end_page |
3322 |
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1766143478780133376 |