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Crossing the Pillars of Hercules: Understanding transoceanic migrations of seabirds throughout their breeding range
Variability in long‐distance migration strategies is still poorly understood due to the fact that individuals are often tracked from a single colony/population. Transoceanic migrations of Scopoli's shearwaters (Calonectris diomedea) across the Strait of Gibraltar (SoG) have been tracked from se...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2019
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6476834/ https://www.ncbi.nlm.nih.gov/pubmed/31031942 http://dx.doi.org/10.1002/ece3.5079 |
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author | Ramos, Raül |
author_facet | Ramos, Raül |
author_sort | Ramos, Raül |
collection | PubMed |
description | Variability in long‐distance migration strategies is still poorly understood due to the fact that individuals are often tracked from a single colony/population. Transoceanic migrations of Scopoli's shearwaters (Calonectris diomedea) across the Strait of Gibraltar (SoG) have been tracked from several breeding colonies isolatedly, and factors related to the variability in phenological schedules among different populations remain, therefore, not well‐understood. Using light‐level geolocator data, I examined the autumn (postbreeding) and spring (prebreeding) migratory passage dates through SoG of four populations of Scopoli's shearwater spread along the longitudinal breeding range of the species. Additionally, I also estimated the at‐sea activity patterns (from immersion data) during both migratory passages, as well as the body size (from morphometric data) of the individuals of these populations. On average, Scopoli's shearwaters leave the Mediterranean (cross SoG) on 31 October ± 1.8 days on their autumn migrations and return on 03 March ± 1.6 days on their spring migrations. At the population level, there was a clear gradient in the timing of crossing SoG: birds from the westernmost populations (Murcia, SE Spain) were the first ones in leaving the Mediterranean while easternmost breeders (Paximada, Crete) were the last ones. In spring, only birds from the largest breeding population (Zembra, Tunisia) seemed to advance their return and crossed SoG significantly earlier than birds tracked at the remaining populations. In both passages, shearwaters from central and eastern populations spent more time flying than their conspecifics from the western Mediterranean. Scopoli's shearwater populations display a differential phenology and behavior in their migratory passages through SoG. The longitudinal gradient in body size already reported for the species could be an evolutionary response to an obvious trade‐off between sharing common wintering grounds in the Atlantic Ocean and the temporal constraints of restoring physiological condition in those grounds. OPEN RESEARCH BADGES: [Image: see text] This article has earned an Open Data Badge for making publicly available the digitally‐shareable data necessary to reproduce the reported results. The data is available at https://hdl.handle.net/2445/128784. |
format | Online Article Text |
id | pubmed-6476834 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-64768342019-04-26 Crossing the Pillars of Hercules: Understanding transoceanic migrations of seabirds throughout their breeding range Ramos, Raül Ecol Evol Original Research Variability in long‐distance migration strategies is still poorly understood due to the fact that individuals are often tracked from a single colony/population. Transoceanic migrations of Scopoli's shearwaters (Calonectris diomedea) across the Strait of Gibraltar (SoG) have been tracked from several breeding colonies isolatedly, and factors related to the variability in phenological schedules among different populations remain, therefore, not well‐understood. Using light‐level geolocator data, I examined the autumn (postbreeding) and spring (prebreeding) migratory passage dates through SoG of four populations of Scopoli's shearwater spread along the longitudinal breeding range of the species. Additionally, I also estimated the at‐sea activity patterns (from immersion data) during both migratory passages, as well as the body size (from morphometric data) of the individuals of these populations. On average, Scopoli's shearwaters leave the Mediterranean (cross SoG) on 31 October ± 1.8 days on their autumn migrations and return on 03 March ± 1.6 days on their spring migrations. At the population level, there was a clear gradient in the timing of crossing SoG: birds from the westernmost populations (Murcia, SE Spain) were the first ones in leaving the Mediterranean while easternmost breeders (Paximada, Crete) were the last ones. In spring, only birds from the largest breeding population (Zembra, Tunisia) seemed to advance their return and crossed SoG significantly earlier than birds tracked at the remaining populations. In both passages, shearwaters from central and eastern populations spent more time flying than their conspecifics from the western Mediterranean. Scopoli's shearwater populations display a differential phenology and behavior in their migratory passages through SoG. The longitudinal gradient in body size already reported for the species could be an evolutionary response to an obvious trade‐off between sharing common wintering grounds in the Atlantic Ocean and the temporal constraints of restoring physiological condition in those grounds. OPEN RESEARCH BADGES: [Image: see text] This article has earned an Open Data Badge for making publicly available the digitally‐shareable data necessary to reproduce the reported results. The data is available at https://hdl.handle.net/2445/128784. John Wiley and Sons Inc. 2019-04-01 /pmc/articles/PMC6476834/ /pubmed/31031942 http://dx.doi.org/10.1002/ece3.5079 Text en © 2019 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Research Ramos, Raül Crossing the Pillars of Hercules: Understanding transoceanic migrations of seabirds throughout their breeding range |
title | Crossing the Pillars of Hercules: Understanding transoceanic migrations of seabirds throughout their breeding range |
title_full | Crossing the Pillars of Hercules: Understanding transoceanic migrations of seabirds throughout their breeding range |
title_fullStr | Crossing the Pillars of Hercules: Understanding transoceanic migrations of seabirds throughout their breeding range |
title_full_unstemmed | Crossing the Pillars of Hercules: Understanding transoceanic migrations of seabirds throughout their breeding range |
title_short | Crossing the Pillars of Hercules: Understanding transoceanic migrations of seabirds throughout their breeding range |
title_sort | crossing the pillars of hercules: understanding transoceanic migrations of seabirds throughout their breeding range |
topic | Original Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6476834/ https://www.ncbi.nlm.nih.gov/pubmed/31031942 http://dx.doi.org/10.1002/ece3.5079 |
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