Tracking through Life Stages: Adult, Immature and Juvenile Autumn Migration in a Long-Lived Seabird
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{"title"=>"Tracking through Life Stages: Adult, Immature and Juvenile Autumn Migration in a Long-Lived Seabird", "type"=>"journal", "authors"=>[{"first_name"=>"Clara", "last_name"=>"Péron", "scopus_author_id"=>"36150339600"}, {"first_name"=>"David", "last_name"=>"Grémillet", "scopus_author_id"=>"54903897800"}], "year"=>2013, "source"=>"PLoS ONE", "identifiers"=>{"pui"=>"369579380", "sgr"=>"84881590910", "issn"=>"19326203", "pmid"=>"23977344", "scopus"=>"2-s2.0-84881590910", "doi"=>"10.1371/journal.pone.0072713", "isbn"=>"1932-6203 (Electronic)\\r1932-6203 (Linking)"}, "id"=>"099e1202-d651-31b9-958f-2c661eb9e832", "abstract"=>"Seasonal long-distance migration is likely to be experienced in a contrasted manner by juvenile, immature and adult birds, leading to variations in migratory routes, timing and behaviour. We provide the first analysis of late summer movements and autumn migration in these three life stages, which were tracked concurrently using satellite tags, geolocators or GPS recorders in a long-ranging migratory seabird, the Scopoli's shearwater (formerly named Cory's shearwater, Calonectrisdiomedea) breeding on two French Mediterranean islands. During the late breeding season, immatures foraged around their colony like breeding adults, but they were the only group showing potential prospecting movements around non-natal colonies. Global migration routes were broadly comparable between the two populations and the three life stages, with all individuals heading towards the Atlantic Ocean through the strait of Gibraltar and travelling along the West African coast, up to 8000 km from their colony. However, detailed comparison of timing, trajectory and oceanographic conditions experienced by the birds revealed remarkable age-related differences. Compared to adults and immatures, juveniles made a longer stop-over in the Balearic Sea (10 days vs 4 days in average), showed lower synchrony in crossing the Gibraltar strait, had more sinuous pathways and covered longer daily distances (240 km.d(-1) vs 170 km.d(-1)). Analysis of oceanographic habitats along migratory routes revealed funnelling selection of habitat towards coastal and more productive waters with increasing age. Younger birds may have reduced navigational ability and learn progressively fine-scale migration routes towards the more profitable travelling and wintering areas. Our study demonstrates the importance of tracking long-lived species through the stages, to better understand migratory behavior and assess differential exposure to at-sea threats. Shared distribution between life stages and populations make Scopoli's shearwaters particularly vulnerable to extreme mortality events in autumn and winter. Such knowledge is key for the conservation of critical marine habitats.", "link"=>"http://www.mendeley.com/research/tracking-through-life-stages-adult-immature-juvenile-autumn-migration-longlived-seabird", "reader_count"=>115, "reader_count_by_academic_status"=>{"Unspecified"=>3, "Professor > Associate Professor"=>2, "Librarian"=>1, "Researcher"=>25, "Student > Doctoral Student"=>2, "Student > Ph. D. Student"=>27, "Student > Postgraduate"=>6, "Student > Master"=>25, "Other"=>7, "Student > Bachelor"=>15, "Lecturer"=>1, "Professor"=>1}, "reader_count_by_user_role"=>{"Unspecified"=>3, "Professor > Associate Professor"=>2, "Librarian"=>1, "Researcher"=>25, "Student > Doctoral Student"=>2, "Student > Ph. D. Student"=>27, "Student > Postgraduate"=>6, "Student > Master"=>25, "Other"=>7, "Student > Bachelor"=>15, "Lecturer"=>1, "Professor"=>1}, "reader_count_by_subject_area"=>{"Unspecified"=>6, "Environmental Science"=>30, "Biochemistry, Genetics and Molecular Biology"=>1, "Agricultural and Biological Sciences"=>77, "Earth and Planetary Sciences"=>1}, "reader_count_by_subdiscipline"=>{"Earth and Planetary Sciences"=>{"Earth and Planetary Sciences"=>1}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>77}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>1}, "Unspecified"=>{"Unspecified"=>6}, "Environmental Science"=>{"Environmental Science"=>30}}, "reader_count_by_country"=>{"Canada"=>1, "Netherlands"=>1, "Belgium"=>1, "United States"=>3, "Brazil"=>2, "United Kingdom"=>2, "Italy"=>1, "South Africa"=>1, "Israel"=>1, "France"=>1, "Portugal"=>1, "Spain"=>1}, "group_count"=>2}

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/1173326"], "description"=>"<p>Kernel density contours illustrate the three main wintering areas of 30 adults fitted with geolocators. Argos PTT locations and reconstructed path appear in red dots and lines. The average primary productivity (Chlorophyll-a concentration, mg.m<sup>-3</sup>) for the’r’r winter period (November 2011 to February 2012) is displayed in the background.</p>", "links"=>[], "tags"=>["post-breeding"], "article_id"=>775156, "categories"=>["Biological Sciences", "Earth and Environmental Sciences", "Ecology"], "users"=>["Clara Péron", "David Grémillet"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0072713.g003", "stats"=>{"downloads"=>0, "page_views"=>4, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Winter_distribution_of_post_breeding_adult_Scopoli_8217_s_shearwaters_/775156", "title"=>"Winter distribution of post-breeding adult Scopoli’s shearwaters.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-08-16 02:42:33"}
  • {"files"=>["https://ndownloader.figshare.com/files/1173334", "https://ndownloader.figshare.com/files/1173337", "https://ndownloader.figshare.com/files/1173339"], "description"=>"<div><p>Seasonal long-distance migration is likely to be experienced in a contrasted manner by juvenile, immature and adult birds, leading to variations in migratory routes, timing and behaviour. We provide the first analysis of late summer movements and autumn migration in these three life stages, which were tracked concurrently using satellite tags, geolocators or GPS recorders in a long-ranging migratory seabird, the Scopoli’s shearwater (formerly named Cory’s shearwater, <i>Calonectris</i><i>diomedea</i>) breeding on two French Mediterranean islands. During the late breeding season, immatures foraged around their colony like breeding adults, but they were the only group showing potential prospecting movements around non-natal colonies. Global migration routes were broadly comparable between the two populations and the three life stages, with all individuals heading towards the Atlantic Ocean through the strait of Gibraltar and travelling along the West African coast, up to 8000 km from their colony. However, detailed comparison of timing, trajectory and oceanographic conditions experienced by the birds revealed remarkable age-related differences. Compared to adults and immatures, juveniles made a longer stop-over in the Balearic Sea (10 days vs 4 days in average), showed lower synchrony in crossing the Gibraltar strait, had more sinuous pathways and covered longer daily distances (240 km.d<sup>-1</sup> vs 170 km.d<sup>-1</sup>). Analysis of oceanographic habitats along migratory routes revealed funnelling selection of habitat towards coastal and more productive waters with increasing age. Younger birds may have reduced navigational ability and learn progressively fine-scale migration routes towards the more profitable travelling and wintering areas. Our study demonstrates the importance of tracking long-lived species through the stages, to better understand migratory behavior and assess differential exposure to at-sea threats. Shared distribution between life stages and populations make Scopoli’s shearwaters particularly vulnerable to extreme mortality events in autumn and winter. Such knowledge is key for the conservation of critical marine habitats.</p> </div>", "links"=>[], "tags"=>["immature", "juvenile", "autumn", "long-lived"], "article_id"=>775161, "categories"=>["Biological Sciences", "Earth and Environmental Sciences", "Ecology"], "users"=>["Clara Péron", "David Grémillet"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0072713.s001", "https://dx.doi.org/10.1371/journal.pone.0072713.s002", "https://dx.doi.org/10.1371/journal.pone.0072713.s003"], "stats"=>{"downloads"=>0, "page_views"=>5, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Tracking_through_Life_Stages_Adult_Immature_and_Juvenile_Autumn_Migration_in_a_Long_Lived_Seabird_/775161", "title"=>"Tracking through Life Stages: Adult, Immature and Juvenile Autumn Migration in a Long-Lived Seabird", "pos_in_sequence"=>0, "defined_type"=>4, "published_date"=>"2013-08-16 02:42:33"}
  • {"files"=>["https://ndownloader.figshare.com/files/1173330"], "description"=>"<p>Daily distance was calculated from individual PTT tracks reconstructed using state-space models for juvenile, immature and adult Scopoli’s shearwaters. The rectangle corresponds to the period when birds crossed the strait of Gibraltar.</p>", "links"=>[], "tags"=>["cumulative", "travelled", "distances"], "article_id"=>775159, "categories"=>["Biological Sciences", "Earth and Environmental Sciences", "Ecology"], "users"=>["Clara Péron", "David Grémillet"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0072713.g005", "stats"=>{"downloads"=>0, "page_views"=>6, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Comparison_of_cumulative_travelled_distances_between_life_stages_/775159", "title"=>"Comparison of cumulative travelled distances between life stages.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-08-16 02:42:33"}
  • {"files"=>["https://ndownloader.figshare.com/files/1173332"], "description"=>"<p>Two-dimensional niches were plotted from kernel density estimations of bathymetry and chlorophyll-a concentration extracted along reconstructed trajectories of Scopoli’s shearwaters migrating from Gibraltar to winter quarters along the Western African coast. The color scale corresponds to scaled density estimation (d-min(d)/(max(d)-min(d)) for each individual life stage.</p>", "links"=>[], "tags"=>["migratory", "oceanographic", "preferences"], "article_id"=>775160, "categories"=>["Biological Sciences", "Earth and Environmental Sciences", "Ecology"], "users"=>["Clara Péron", "David Grémillet"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0072713.g006", "stats"=>{"downloads"=>0, "page_views"=>3, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Comparison_of_migratory_oceanographic_preferences_between_life_stages_/775160", "title"=>"Comparison of migratory oceanographic preferences between life stages.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-08-16 02:42:33"}
  • {"files"=>["https://ndownloader.figshare.com/files/1173328"], "description"=>"<p>Triangles correspond to the date of crossing of the Gibraltar strait and the capital letter indicate the colony where birds were equipped (R: Riou Is., F: Frioul Is. and L: Lavezzi Is.).</p>", "links"=>[], "tags"=>["post-fledging", "movements", "juvenile", "autumn", "immature", "shearwaters", "tracked"], "article_id"=>775158, "categories"=>["Biological Sciences", "Earth and Environmental Sciences", "Ecology"], "users"=>["Clara Péron", "David Grémillet"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0072713.g004", "stats"=>{"downloads"=>0, "page_views"=>9, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Timing_of_post_fledging_movements_of_juvenile_and_autumn_migration_of_immature_and_adult_Scopoli_8217_s_shearwaters_tracked_with_PTTs_/775158", "title"=>"Timing of post-fledging movements of juvenile and autumn migration of immature and adult Scopoli’s shearwaters tracked with PTTs.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-08-16 02:42:33"}
  • {"files"=>["https://ndownloader.figshare.com/files/1173325"], "description"=>"<p>Upper panel: start of autumn migration/post-fledging departure in the Mediterranean Sea. Middle panel: entire autumn migration/post-fledging departure and arrival at wintering areas. Birds were fitted with PTTs on the Marseille islands (red) and Lavezzi Island, Corsica (yellow). Locations are Argos locations filtered with a speed filter and paths are ‘reconstructed’ tracks using a state-space model. Bathymetry is shown as a blue scale. Lower panel: rose diagrams of turning angles distribution drawn for each life stage highlight inter-stage differences in sinuosity of migratory routes.</p>", "links"=>[], "tags"=>["juvenile", "immature", "post-breeding", "shearwaters", "migratory"], "article_id"=>775155, "categories"=>["Biological Sciences", "Earth and Environmental Sciences", "Ecology"], "users"=>["Clara Péron", "David Grémillet"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0072713.g002", "stats"=>{"downloads"=>0, "page_views"=>5, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Comparison_of_juvenile_n_10_immature_n_7_and_post_breeding_adult_n_3_Scopoli_8217_s_shearwaters_migratory_routes_/775155", "title"=>"Comparison of juvenile (n=10), immature (n=7) and post-breeding adult (n=3) Scopoli’s shearwaters migratory routes.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-08-16 02:42:33"}
  • {"files"=>["https://ndownloader.figshare.com/files/1173324"], "description"=>"<p>At-sea foraging trips of adults and immatures tracked during the late breeding season (20/08/2011–12/09/2011) and pre-migration period (12/09/2011 onwards).</p>", "links"=>[], "tags"=>["pre-migration", "breeding", "immature"], "article_id"=>775154, "categories"=>["Biological Sciences", "Earth and Environmental Sciences", "Ecology"], "users"=>["Clara Péron", "David Grémillet"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0072713.g001", "stats"=>{"downloads"=>0, "page_views"=>2, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Late_summer_and_pre_migration_distribution_of_breeding_adult_and_immature_Scopoli_8217_s_shearwaters_/775154", "title"=>"Late-summer and pre-migration distribution of breeding adult and immature Scopoli’s shearwaters.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-08-16 02:42:33"}

PMC Usage Stats | Further Information

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  • {"unique-ip"=>"16", "full-text"=>"15", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"6", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"10"}
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  • {"unique-ip"=>"18", "full-text"=>"47", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"12"}
  • {"unique-ip"=>"16", "full-text"=>"31", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"1"}
  • {"unique-ip"=>"13", "full-text"=>"16", "pdf"=>"4", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"2"}
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Relative Metric

{"start_date"=>"2013-01-01T00:00:00Z", "end_date"=>"2013-12-31T00:00:00Z", "subject_areas"=>[{"subject_area"=>"/Biology and life sciences", "average_usage"=>[269, 466, 588, 697, 800, 896, 988, 1076, 1165, 1254, 1340, 1417]}, {"subject_area"=>"/Ecology and environmental sciences", "average_usage"=>[284, 475, 603, 722, 826, 928, 1026, 1129, 1225, 1310, 1390, 1468, 1549]}, {"subject_area"=>"/Ecology and environmental sciences/Habitats", "average_usage"=>[297, 459, 571, 677, 787, 867, 962, 1045, 1121, 1208, 1289, 1372, 1442]}, {"subject_area"=>"/People and places", "average_usage"=>[270, 456, 573, 676, 773, 867, 955, 1037, 1120, 1205, 1286, 1363, 1436]}]}
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