Phenology and Wintering Population Estimates of Auks in the Mediterranean Sea Based on Counts from a Strategic Coastal Location in the Strait of Gibraltar
[EN] Some migratory seabird populations have declined sharply in recent decades. Monitoring their migratory movements from strategic locations provides a useful tool to understand their phenology and estimate their population sizes. During the autumn 2020 and spring 2021 migration periods, we conduc...
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BioOne
2022
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ftcsic:oai:digital.csic.es:10261/343850 2024-06-23T07:45:10+00:00 Phenology and Wintering Population Estimates of Auks in the Mediterranean Sea Based on Counts from a Strategic Coastal Location in the Strait of Gibraltar Fenología y estimas de la población invernante de álcidos en el mar mediterráneo a través de conteos desde costa en un punto estratégico, el Estrecho de Gibraltar Cruz, Andrés de la Rollán, Laura Pérez, Blanca Guerrero, Marina Elorriaga, Javier Benjumea, Rafael González Miguel, Javier Seminario, Yeray Arroyo, Gonzalo M. Ramírez, Juan 2022-07-01 http://hdl.handle.net/10261/343850 https://doi.org/10.13157/arla.69.2.2022.sc4 https://api.elsevier.com/content/abstract/scopus_id/85135181695 en eng BioOne Ardeola https://doi.org/10.13157/arla.69.2.2022.sc4 Sí Ardeola 69(2): 303-317 (2022) 0570-7358 http://hdl.handle.net/10261/343850 doi:10.13157/arla.69.2.2022.sc4 2-s2.0-85135181695 https://api.elsevier.com/content/abstract/scopus_id/85135181695 none Atlantic Puffin GzAM migration predictive modelling Razorbill seabirds alca común frailecillo atlántico migración modelo predictivo artículo http://purl.org/coar/resource_type/c_6501 2022 ftcsic https://doi.org/10.13157/arla.69.2.2022.sc4 2024-05-29T00:05:22Z [EN] Some migratory seabird populations have declined sharply in recent decades. Monitoring their migratory movements from strategic locations provides a useful tool to understand their phenology and estimate their population sizes. During the autumn 2020 and spring 2021 migration periods, we conducted a total of 183 hours of counts of two auk species, Razorbill Alca torda and Atlantic Puffin Fratercula arctica, from a strategic coastal point (Tarifa Island in the Strait of Gibraltar). We used Generalized Additive Models (GzAM) to estimate the number of birds that could have entered or left the Mediterranean Sea on the days that no counting took place. Auks entered the Mediterranean from early October to early winter, peaking in the second half of November. In spring, Razorbill movements leaving the Mediterranean were concentrated from mid-January to mid-April, while the peak Atlantic Puffin movement occurred from mid-February to May. We estimate that 4,000-5,000 Razorbills and 15,000 Atlantic Puffins made up the populations migrating through the Strait of Gibraltar in the year of the study. These figures are notably lower than those previously reported for auks passing through this migratory bottleneck. Hence, the results of this study, despite coming from a single year of monitoring, may contribute significantly to assessing the numbers of auks that winter in the Mediterranean and could eventually draw attention to possible declines in their numbers. - De la Cruz, A., Rollán, L., Pérez, B., Guerrero, M., Elorriaga, J., Benjumea, R., González, M., Seminario, Y., Arroyo, G.M. & Ramírez, J. (2022). Phenology and wintering population estimates of auks in the Mediterranean Sea based on counts from a strategic coastal location in the Strait of Gibraltar. Ardeola, 69: 303-317. [ES] Las poblaciones de aves marinas migratorias han sufrido un fuerte descenso en las últimas décadas. El seguimiento de sus movimientos migratorios desde lugares estratégicos supone una herramienta de gran utilidad para entender su ... Article in Journal/Newspaper alca común Alca torda Atlantic puffin frailecillo atlántico fratercula Fratercula arctica Razorbill Digital.CSIC (Spanish National Research Council) Estrecho ENVELOPE(-60.783,-60.783,-62.467,-62.467) Fuerte ENVELOPE(-54.083,-54.083,-61.200,-61.200) Ardeola 69 2 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Atlantic Puffin GzAM migration predictive modelling Razorbill seabirds alca común frailecillo atlántico migración modelo predictivo |
spellingShingle |
Atlantic Puffin GzAM migration predictive modelling Razorbill seabirds alca común frailecillo atlántico migración modelo predictivo Cruz, Andrés de la Rollán, Laura Pérez, Blanca Guerrero, Marina Elorriaga, Javier Benjumea, Rafael González Miguel, Javier Seminario, Yeray Arroyo, Gonzalo M. Ramírez, Juan Phenology and Wintering Population Estimates of Auks in the Mediterranean Sea Based on Counts from a Strategic Coastal Location in the Strait of Gibraltar |
topic_facet |
Atlantic Puffin GzAM migration predictive modelling Razorbill seabirds alca común frailecillo atlántico migración modelo predictivo |
description |
[EN] Some migratory seabird populations have declined sharply in recent decades. Monitoring their migratory movements from strategic locations provides a useful tool to understand their phenology and estimate their population sizes. During the autumn 2020 and spring 2021 migration periods, we conducted a total of 183 hours of counts of two auk species, Razorbill Alca torda and Atlantic Puffin Fratercula arctica, from a strategic coastal point (Tarifa Island in the Strait of Gibraltar). We used Generalized Additive Models (GzAM) to estimate the number of birds that could have entered or left the Mediterranean Sea on the days that no counting took place. Auks entered the Mediterranean from early October to early winter, peaking in the second half of November. In spring, Razorbill movements leaving the Mediterranean were concentrated from mid-January to mid-April, while the peak Atlantic Puffin movement occurred from mid-February to May. We estimate that 4,000-5,000 Razorbills and 15,000 Atlantic Puffins made up the populations migrating through the Strait of Gibraltar in the year of the study. These figures are notably lower than those previously reported for auks passing through this migratory bottleneck. Hence, the results of this study, despite coming from a single year of monitoring, may contribute significantly to assessing the numbers of auks that winter in the Mediterranean and could eventually draw attention to possible declines in their numbers. - De la Cruz, A., Rollán, L., Pérez, B., Guerrero, M., Elorriaga, J., Benjumea, R., González, M., Seminario, Y., Arroyo, G.M. & Ramírez, J. (2022). Phenology and wintering population estimates of auks in the Mediterranean Sea based on counts from a strategic coastal location in the Strait of Gibraltar. Ardeola, 69: 303-317. [ES] Las poblaciones de aves marinas migratorias han sufrido un fuerte descenso en las últimas décadas. El seguimiento de sus movimientos migratorios desde lugares estratégicos supone una herramienta de gran utilidad para entender su ... |
format |
Article in Journal/Newspaper |
author |
Cruz, Andrés de la Rollán, Laura Pérez, Blanca Guerrero, Marina Elorriaga, Javier Benjumea, Rafael González Miguel, Javier Seminario, Yeray Arroyo, Gonzalo M. Ramírez, Juan |
author_facet |
Cruz, Andrés de la Rollán, Laura Pérez, Blanca Guerrero, Marina Elorriaga, Javier Benjumea, Rafael González Miguel, Javier Seminario, Yeray Arroyo, Gonzalo M. Ramírez, Juan |
author_sort |
Cruz, Andrés de la |
title |
Phenology and Wintering Population Estimates of Auks in the Mediterranean Sea Based on Counts from a Strategic Coastal Location in the Strait of Gibraltar |
title_short |
Phenology and Wintering Population Estimates of Auks in the Mediterranean Sea Based on Counts from a Strategic Coastal Location in the Strait of Gibraltar |
title_full |
Phenology and Wintering Population Estimates of Auks in the Mediterranean Sea Based on Counts from a Strategic Coastal Location in the Strait of Gibraltar |
title_fullStr |
Phenology and Wintering Population Estimates of Auks in the Mediterranean Sea Based on Counts from a Strategic Coastal Location in the Strait of Gibraltar |
title_full_unstemmed |
Phenology and Wintering Population Estimates of Auks in the Mediterranean Sea Based on Counts from a Strategic Coastal Location in the Strait of Gibraltar |
title_sort |
phenology and wintering population estimates of auks in the mediterranean sea based on counts from a strategic coastal location in the strait of gibraltar |
publisher |
BioOne |
publishDate |
2022 |
url |
http://hdl.handle.net/10261/343850 https://doi.org/10.13157/arla.69.2.2022.sc4 https://api.elsevier.com/content/abstract/scopus_id/85135181695 |
long_lat |
ENVELOPE(-60.783,-60.783,-62.467,-62.467) ENVELOPE(-54.083,-54.083,-61.200,-61.200) |
geographic |
Estrecho Fuerte |
geographic_facet |
Estrecho Fuerte |
genre |
alca común Alca torda Atlantic puffin frailecillo atlántico fratercula Fratercula arctica Razorbill |
genre_facet |
alca común Alca torda Atlantic puffin frailecillo atlántico fratercula Fratercula arctica Razorbill |
op_relation |
Ardeola https://doi.org/10.13157/arla.69.2.2022.sc4 Sí Ardeola 69(2): 303-317 (2022) 0570-7358 http://hdl.handle.net/10261/343850 doi:10.13157/arla.69.2.2022.sc4 2-s2.0-85135181695 https://api.elsevier.com/content/abstract/scopus_id/85135181695 |
op_rights |
none |
op_doi |
https://doi.org/10.13157/arla.69.2.2022.sc4 |
container_title |
Ardeola |
container_volume |
69 |
container_issue |
2 |
_version_ |
1802651700875493376 |