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...
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ftunivnantes:oai:HAL:hal-00323809v1 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) La Rochelle Université (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://hal.science/hal-00323809 https://doi.org/10.1016/j.rse.2008.01.019 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.rse.2008.01.019 hal-00323809 https://hal.science/hal-00323809 doi:10.1016/j.rse.2008.01.019 ISSN: 0034-4257 EISSN: 1879-0704 Remote Sensing of Environment https://hal.science/hal-00323809 Remote Sensing of Environment, 2008, 112, pp.3314-3322. ⟨10.1016/j.rse.2008.01.019⟩ Aerial survey Biodiversity Monitoring Open sea areas Seabirds Strip-transect Visibility bias [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2008 ftunivnantes https://doi.org/10.1016/j.rse.2008.01.019 2023-02-08T04:31:50Z 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 Université de Nantes: HAL-UNIV-NANTES Remote Sensing of Environment 112 8 3314 3322 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Aerial survey Biodiversity Monitoring Open sea areas Seabirds Strip-transect Visibility bias [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
Aerial survey Biodiversity Monitoring Open sea areas Seabirds Strip-transect Visibility bias [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society [SDE.MCG]Environmental Sciences/Global Changes 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 [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society [SDE.MCG]Environmental Sciences/Global Changes |
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) La Rochelle Université (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://hal.science/hal-00323809 https://doi.org/10.1016/j.rse.2008.01.019 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
ISSN: 0034-4257 EISSN: 1879-0704 Remote Sensing of Environment https://hal.science/hal-00323809 Remote Sensing of Environment, 2008, 112, pp.3314-3322. ⟨10.1016/j.rse.2008.01.019⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.rse.2008.01.019 hal-00323809 https://hal.science/hal-00323809 doi:10.1016/j.rse.2008.01.019 |
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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1766143475724582912 |