Using large scale surveys to investigate seasonal variations in seabird distribution and abundance. Part II: The Bay of Biscay and the English Channel.
International audience Seabird distributions and the associated seasonal variations remain challenging to investigate, especially in oceanic areas. Recent advances in telemetry have provided considerable information on seabird ecology, but still exclude small species, non-breeding birds and individu...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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Main Authors: | , , , , , , , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2017
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Subjects: | |
Online Access: | https://hal.science/hal-01510327 https://doi.org/10.1016/j.dsr2.2016.11.012 |
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ftunivrochelle:oai:HAL:hal-01510327v1 |
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openpolar |
institution |
Open Polar |
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HAL - Université de La Rochelle |
op_collection_id |
ftunivrochelle |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Pettex, Emeline Laran, Sophie Authier, Matthieu Blanck, Aurélie Dorémus, Ghislain Falchetto, Hélène Lambert, Charlotte Monestiez, Pascal, P. Stéfan, Eric van Canneyt, Olivier Ridoux, Vincent Using large scale surveys to investigate seasonal variations in seabird distribution and abundance. Part II: The Bay of Biscay and the English Channel. |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience Seabird distributions and the associated seasonal variations remain challenging to investigate, especially in oceanic areas. Recent advances in telemetry have provided considerable information on seabird ecology, but still exclude small species, non-breeding birds and individuals from inaccessible colonies from any scientific survey. To overcome this issue and investigate seabird distribution and abundance in the eastern North Atlantic (ENA), large-scale aerial surveys were conducted in winter 2011-12 and summer 2012 over a 375,000 km² area encompassing the English Channel (EC) and the Bay of Biscay (BoB). Seabird sightings, from 15 taxonomic groups, added up to 17,506 and 8,263 sightings in winter and summer respectively, along 66,307 km. Using geostatistical methods, density maps were provided for both seasons. Abundance was estimated by strip transect sampling. Most taxa showed marked seasonal variations in their density and distribution. The highest densities were recorded during winter for most groups except shearwaters, storm-petrels, terns and large-sized gulls. Subsequently, the abundance in winter nearly reached one million individuals and was 2.5 times larger than in summer. The continental shelf and the slope in the BoB and the EC were identified as key areas for seabird conservation, especially during winter, as birds from northern Europe migrate southward after breeding. This large-scale study provided a synoptic view of the seabird community in the ENA, over two contrasting seasons. Our results highlight that oceanic areas harbour an abundant avifauna. Since most of the existing marine protected areas are restricted to the coastal fringe, the importance of oceanic areas in winter should be considered in future conservation plans. Our work will provide a baseline for the monitoring of seabird distribution at sea, and could inform the EU Marine Strategy Framework Directive. |
author2 |
Observatoire pour la Conservation de la Mégafaune Marine (PELAGIS) LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Agence des Aires Marines Protégées La Rochelle Université (ULR) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Biostatistique et Processus Spatiaux (BioSP) Institut National de la Recherche Agronomique (INRA) APECS (Association pour l’Etude et la Conservation des Sélaciens) France French Ministry in charge of the environment (Ministère de l'Environnement, de l'Energie et de la Mer); French Marine Protected Areas Agency (Agence des aires marines protégées, AAMP) |
format |
Article in Journal/Newspaper |
author |
Pettex, Emeline Laran, Sophie Authier, Matthieu Blanck, Aurélie Dorémus, Ghislain Falchetto, Hélène Lambert, Charlotte Monestiez, Pascal, P. Stéfan, Eric van Canneyt, Olivier Ridoux, Vincent |
author_facet |
Pettex, Emeline Laran, Sophie Authier, Matthieu Blanck, Aurélie Dorémus, Ghislain Falchetto, Hélène Lambert, Charlotte Monestiez, Pascal, P. Stéfan, Eric van Canneyt, Olivier Ridoux, Vincent |
author_sort |
Pettex, Emeline |
title |
Using large scale surveys to investigate seasonal variations in seabird distribution and abundance. Part II: The Bay of Biscay and the English Channel. |
title_short |
Using large scale surveys to investigate seasonal variations in seabird distribution and abundance. Part II: The Bay of Biscay and the English Channel. |
title_full |
Using large scale surveys to investigate seasonal variations in seabird distribution and abundance. Part II: The Bay of Biscay and the English Channel. |
title_fullStr |
Using large scale surveys to investigate seasonal variations in seabird distribution and abundance. Part II: The Bay of Biscay and the English Channel. |
title_full_unstemmed |
Using large scale surveys to investigate seasonal variations in seabird distribution and abundance. Part II: The Bay of Biscay and the English Channel. |
title_sort |
using large scale surveys to investigate seasonal variations in seabird distribution and abundance. part ii: the bay of biscay and the english channel. |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.science/hal-01510327 https://doi.org/10.1016/j.dsr2.2016.11.012 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0967-0645 Deep Sea Research Part II: Topical Studies in Oceanography https://hal.science/hal-01510327 Deep Sea Research Part II: Topical Studies in Oceanography, 2017, 141, pp.86-101. ⟨10.1016/j.dsr2.2016.11.012⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr2.2016.11.012 hal-01510327 https://hal.science/hal-01510327 doi:10.1016/j.dsr2.2016.11.012 PRODINRA: 402569 WOS: 000405251400008 |
op_doi |
https://doi.org/10.1016/j.dsr2.2016.11.012 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
141 |
container_start_page |
86 |
op_container_end_page |
101 |
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1790604550380453888 |
spelling |
ftunivrochelle:oai:HAL:hal-01510327v1 2024-02-11T10:06:41+01:00 Using large scale surveys to investigate seasonal variations in seabird distribution and abundance. Part II: The Bay of Biscay and the English Channel. Pettex, Emeline Laran, Sophie Authier, Matthieu Blanck, Aurélie Dorémus, Ghislain Falchetto, Hélène Lambert, Charlotte Monestiez, Pascal, P. Stéfan, Eric van Canneyt, Olivier Ridoux, Vincent Observatoire pour la Conservation de la Mégafaune Marine (PELAGIS) LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Agence des Aires Marines Protégées La Rochelle Université (ULR) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Biostatistique et Processus Spatiaux (BioSP) Institut National de la Recherche Agronomique (INRA) APECS (Association pour l’Etude et la Conservation des Sélaciens) France French Ministry in charge of the environment (Ministère de l'Environnement, de l'Energie et de la Mer); French Marine Protected Areas Agency (Agence des aires marines protégées, AAMP) 2017 https://hal.science/hal-01510327 https://doi.org/10.1016/j.dsr2.2016.11.012 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr2.2016.11.012 hal-01510327 https://hal.science/hal-01510327 doi:10.1016/j.dsr2.2016.11.012 PRODINRA: 402569 WOS: 000405251400008 ISSN: 0967-0645 Deep Sea Research Part II: Topical Studies in Oceanography https://hal.science/hal-01510327 Deep Sea Research Part II: Topical Studies in Oceanography, 2017, 141, pp.86-101. ⟨10.1016/j.dsr2.2016.11.012⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2017 ftunivrochelle https://doi.org/10.1016/j.dsr2.2016.11.012 2024-01-23T23:35:36Z International audience Seabird distributions and the associated seasonal variations remain challenging to investigate, especially in oceanic areas. Recent advances in telemetry have provided considerable information on seabird ecology, but still exclude small species, non-breeding birds and individuals from inaccessible colonies from any scientific survey. To overcome this issue and investigate seabird distribution and abundance in the eastern North Atlantic (ENA), large-scale aerial surveys were conducted in winter 2011-12 and summer 2012 over a 375,000 km² area encompassing the English Channel (EC) and the Bay of Biscay (BoB). Seabird sightings, from 15 taxonomic groups, added up to 17,506 and 8,263 sightings in winter and summer respectively, along 66,307 km. Using geostatistical methods, density maps were provided for both seasons. Abundance was estimated by strip transect sampling. Most taxa showed marked seasonal variations in their density and distribution. The highest densities were recorded during winter for most groups except shearwaters, storm-petrels, terns and large-sized gulls. Subsequently, the abundance in winter nearly reached one million individuals and was 2.5 times larger than in summer. The continental shelf and the slope in the BoB and the EC were identified as key areas for seabird conservation, especially during winter, as birds from northern Europe migrate southward after breeding. This large-scale study provided a synoptic view of the seabird community in the ENA, over two contrasting seasons. Our results highlight that oceanic areas harbour an abundant avifauna. Since most of the existing marine protected areas are restricted to the coastal fringe, the importance of oceanic areas in winter should be considered in future conservation plans. Our work will provide a baseline for the monitoring of seabird distribution at sea, and could inform the EU Marine Strategy Framework Directive. Article in Journal/Newspaper North Atlantic HAL - Université de La Rochelle Deep Sea Research Part II: Topical Studies in Oceanography 141 86 101 |