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Author |
Viblanc Va, Stier A, Bize P, Schull Q, Criscuolo F, Groscolas R, Robin Jp |
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Title |
The ecophysiology of king penguins : responses to a fluctuating environment |
Type |
Book Chapter |
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Year |
2021 |
Publication |
17émes journées scientifiques du cnfra, 26-27 mai 2021, paris, france |
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Abstract |
Penguins are sea...birds. These highly evolved marine predators thrive in the oceanic habitat. Yet, they are conflicted – confronted to the duality of a life spent partly at sea, partly on-land. This life style has them subject to a number of very different ecological pressures. The ECONERGY polar project (IPEV #119) seeks to understand how king penguin cope with the constraints they face while living on-land, and the underlying physiological adaptations that allow them to do so. This includes studies dealing with fasting, parasites, predators, aggressive neighbors, climate and human disturbance. I will present some of the advances our project has made over the past decades, and where we will proceed in the years to come with a new project. We aim to understand bird stress from an integrative perspective, building a long-term observatory of penguin physiological responses to a changing world, and determining how breeding performances on land and foraging performances at sea are related. |
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119 |
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Bachelor's thesis |
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yes |
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Serial |
8106 |
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Author |
É Vignon, M.-L. Roussel, I. V. Gorodetskaya, C. Genthon, A. Berne |
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Title |
Present and Future of Rainfall in Antarctica |
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Journal |
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Year |
2021 |
Publication |
Geophysical Research Letters |
Abbreviated Journal |
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Volume |
48 |
Issue |
8 |
Pages |
e2020GL092281 |
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Abstract |
While most precipitation in Antarctica falls as snow, little is known about liquid precipitation, although it can have ecological and climatic impacts. This study combines meteorological reports at 10 stations with the ERA5 reanalysis to provide a climatological characterization of rainfall occurrence over Antarctica. Along the East Antarctic coast, liquid precipitation occurs 22 days per year at most and coincides with maritime intrusions and blocking anticyclones. Over the north-western Antarctic Peninsula, rainfall occurs more than 50 days per year on average and the recent summer cooling was accompanied by a decrease of −35 annual rainy days per decade between 1998 and 2015 at Faraday-Vernadsky. Projections from seven latest-generation climate models reveal that Antarctic coasts will experience a warming and more frequent and intense rainfall by the end of the century. Rainfall is expected to impact new regions of the continent, increasing their vulnerability to melting by the preconditioning of surface snow. |
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1013,1143 |
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Bachelor's thesis |
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ISSN |
1944-8007 |
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yes |
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Call Number |
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Serial |
7935 |
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Author |
Christophe Leroy-Dos Santos, Mathieu Casado, Frédéric Prié, Olivier Jossoud, Erik Kerstel, Morgane Farradèche, Samir Kassi, Elise Fourré, Amaëlle Landais |
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Title |
A dedicated robust instrument for water vapor generation at low humidity for use with a laser water isotope analyzer in cold and dry polar regions |
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Journal |
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Year |
2021 |
Publication |
Atmospheric Measurement Techniques |
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Volume |
14 |
Issue |
4 |
Pages |
2907-2918 |
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Abstract |
Obtaining Precise Continuous Measurements Of Water Vapor Isotopic Composition In Dry Places (Polar Or High-altitude Regions) Is An Important Challenge. The Current Limitation Is The Strong Influence Of Humidity On The Measured Water Isotopic Composition By Laser Spectroscopy Instruments For Low Humidity Levels (Below 3000 Ppmv). This Problem Is Addressed By Determining The Relationships Between Humidity And Measured δ18o And δD Of Known Water Standards. Here, We Present The Development Of A Robust Field Instrument Able To Generate Water Vapor, Down To 70 Ppmv, At Very Stable Humidity Levels (Average 1σ Lower Than 10 Ppmv). This Instrument, Operated By A Raspberry Interface, Can Be Coupled To A Commercial Laser Spectroscopy Instrument. We Checked The Stability Of The System As Well As Its Accuracy When Expressing The Measured Isotopic Composition Of Water Vapor On The Vsmow–slap (Vienna Standard Mean Ocean Water – Standard Light Antarctic Precipitation) Scale. It Proved To Be Highly Stable During Autonomous Operation Over More Than 1 Year At The East Antarctic Concordia And Dumont D'urville Stations. |
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Programme |
1110,1169,1205 |
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Bachelor's thesis |
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ISSN |
1867-1381 |
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yes |
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Call Number |
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Serial |
8010 |
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Author |
Anne-Sophie Bonnet-Lebrun, Maria P. Dias, Richard A. Phillips, José P. Granadeiro, M. de L. Brooke, Olivier Chastel, Thomas A. Clay, Annette L. Fayet, Olivier Gilg, Jacob González-Solís, Tim Guilford, Sveinn A. Hanssen, April Hedd, Audrey Jaeger, Johannes Krietsch, Johannes Lang, Matthieu Le Corre, Teresa Militão, Børge Moe, William A. Montevecchi, Hans-Ulrich Peter, Patrick Pinet, Matt J. Rayner, Tim Reid, José Manuel Reyes-González, Peter G. Ryan, Paul M. Sagar, Niels M. Schmidt, David R. Thompson, Rob van Bemmelen, Yutaka Watanuki, Henri Weimerskirch, Takashi Yamamoto, Paulo Catry |
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Title |
Seabird Migration Strategies: Flight Budgets, Diel Activity Patterns, and Lunar Influence |
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Journal |
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Year |
2021 |
Publication |
Frontiers in Marine Science |
Abbreviated Journal |
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Volume |
8 |
Issue |
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Pages |
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Abstract |
Every year, billions of birds undertake extensive migrations between breeding and non-breeding areas, facing challenges that require behavioural adjustments, particularly to flight timing and duration. Such adjustments in daily activity patterns and the influence of extrinsic factors (e.g., environmental conditions, moonlight) have received much more research attention in terrestrial than marine migrants. Taking advantage of the widespread deployment in recent decades of combined light-level geolocator-immersion loggers, we investigated diel organisation and influence of the moon on flight activities during the non-breeding season of 21 migrant seabird species from a wide taxonomic range (6 families, 3 orders). Migrant seabirds regularly stopped (to either feed or rest) during migration, unlike some terrestrial and wetland birds which fly non-stop. We found an overall increase for most seabird species in time in flight and, for several species, also in flight bout duration, during migration compared to when resident at the non-breeding grounds. Additionally, several nocturnal species spent more of the day in flight during migration than at non-breeding areas, and vice versa for diurnal species. Nocturnal time in flight tended to increase during full moon, both during migration and at the non-breeding grounds, depending on species. Our study provides an extensive overview of activity patterns of migrant seabirds, paving the way for further research on the underlying mechanisms and drivers. |
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Programme |
330,1036 |
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Thesis |
Bachelor's thesis |
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ISSN |
2296-7745 |
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Approved |
yes |
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Call Number |
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Serial |
8417 |
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| Permanent link to this record |
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Author |
Manfred R. Enstipp, Charles-André Bost, Céline Le Bohec, Nicolas Chatelain, Henri Weimerskirch, Yves Handrich |
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Title |
The early life of king penguins: ontogeny of dive capacity and foraging behaviour in an expert diver |
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Journal |
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Year |
2021 |
Publication |
The Journal of Experimental Biology |
Abbreviated Journal |
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Volume |
224 |
Issue |
12 |
Pages |
jeb242512 |
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Keywords |
Animals Behavior, Animal Bio-logging Diving Feeding Behavior Foraging proficiency Ontogeny Seabirds Spheniscidae Temperature Wiggles |
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Abstract |
The period of emancipation in seabirds, when juveniles change from a terrestrial existence to a life at sea, is associated with many challenges. Apart from finding favourable foraging sites, they have to develop effective prey search patterns and physiological capacities that enable them to capture sufficient prey to meet their energetic needs. Animals that dive to forage, such as king penguins (Aptenodytes patagonicus), need to acquire an adequate breath-hold capacity, allowing them to locate and capture prey at depth. To investigate the ontogeny of their dive capacity and foraging performance, we implanted juvenile king penguins before their first departure to sea and also adult breeders with a data-logger recording pressure and temperature. We found that juvenile king penguins possess a remarkable dive capacity when leaving their natal colony, enabling them to conduct dives in excess of 100 m within their first week at sea. Despite this, juvenile dive/foraging performance, investigated in relation to dive depth, remained below the adult level throughout their first year at sea, probably reflecting physiological limitations as a result of incomplete maturation. A significantly shallower foraging depth of juveniles, particularly during their first 5 months at sea, could also indicate differences in foraging strategy and targeted prey. The initially greater wiggle rate suggests that juveniles fed opportunistically and also targeted different prey from adults and/or that many of the wiggles of juveniles reflect unsuccessful prey-capture attempts, indicating a lower foraging proficiency. After 5 months, this difference disappeared, suggesting sufficient physical maturation and improvement of juvenile foraging skills. |
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Programme |
137,394 |
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Thesis |
Bachelor's thesis |
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Edition |
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ISSN |
1477-9145 |
ISBN |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
8473 |
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| Permanent link to this record |
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Author |
Benjamin Pohl, Thomas Saucède, Vincent Favier, Julien Pergaud, Deborah Verfaillie, Jean-Pierre Féral, Ylber Krasniqi, Yves Richard |
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Title |
Recent Climate Variability around the Kerguelen Islands (Southern Ocean) Seen through Weather Regimes |
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Journal |
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Year |
2021 |
Publication |
Journal of Applied Meteorology and Climatology |
Abbreviated Journal |
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Volume |
60 |
Issue |
5 |
Pages |
711-731 |
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Keywords |
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Abstract |
Daily Weather Regimes Are Defined Around The Kerguelen Islands (Southern Ocean) On The Basis Of Daily 500-hpa Geopotential Height Anomalies Derived From The Era5 Ensemble Reanalysis Over The Period 1979–2018. Ten Regimes Are Retained As Significant. Their Occurrences Are Highly Consistent Across Reanalysis Ensemble Members. Regimes Show Weak Seasonality And Nonsignificant Long-term Trends In Their Occurrences. Their Sequences Are Usually Short (1–3 Days), With Extreme Persistence Values Above 10 Days. Seasonal Regime Frequency Is Mostly Driven By The Phase Of The Southern Annular Mode Over Antarctica, Midlatitude Dynamics Over The Southern Ocean Such As The Pacific–south American Mode, And, To A Lesser Extent, Tropical Variability, With Significant But Weaker Relationships With El Niño–southern Oscillation. At The Local Scale Over The Kerguelen Islands, Regimes Have A Strong Influence On Measured Atmospheric And Oceanic Variables, Including Minimum And Maximum Air Temperature, Mostly Driven By Horizontal Advections, Seawater Temperature Recorded 5 M Below The Surface, Wind Speed, And Sea Level Pressure. Relationships Are Weaker For Precipitation Amounts. Regimes Also Modify Regional Contrasts Between Observational Sites In Kerguelen, Highlighting Strong Exposure Contrasts. The Regimes Allow Us To Improve Our Understanding Of Weather And Climate Variability And Interactions In This Region; They Will Be Used In Future Work To Assess Past And Projected Long-term Circulation Changes In The Southern Midlatitudes. |
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Programme |
688,1044,1048 |
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Thesis |
Bachelor's thesis |
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ISSN |
1558-8424 |
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yes |
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Call Number |
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Serial |
8003 |
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Author |
Manon Clairbaux, William W. L. Cheung, Paul Mathewson, Warren Porter, Nicolas Courbin, Jérôme Fort, Hallvard Strøm, Børge Moe, Per Fauchald, Sebastien Descamps, Hálfdán Helgason, Vegard S. Bråthen, Benjamin Merkel, Tycho Anker-Nilssen, Ingar S. Bringsvor, Olivier Chastel, Signe Christensen-Dalsgaard, Jóhannis Danielsen, Francis Daunt, Nina Dehnhard, Kjell-Einar Erikstad, Alexeï Ezhov, Maria Gavrilo, Yuri Krasnov, Magdalene Langset, Svein-Håkon Lorentsen, Mark Newell, Bergur Olsen, Tone Kirstin Reiertsen, Geir Systad, Þorkell L. Þórarinsson, Mark Baran, Tony Diamond, Annette L. Fayet, Michelle G. Fitzsimmons, Morten Frederiksen, Grant H. Gilchrist, Tim Guilford, Nicholas P. Huffeldt, Mark Jessopp, Kasper L. Johansen, Amy L. Kouwenberg, Jannie F. Linnebjerg, Laura McFarlane Tranquilla, Mark Mallory, Flemming R. Merkel, William Montevecchi, Anders Mosbech, Aevar Petersen, David Grémillet |
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Title |
Meeting Paris agreement objectives will temper seabird winter distribution shifts in the North Atlantic Ocean |
Type |
Journal |
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Year |
2021 |
Publication |
Global Change Biology |
Abbreviated Journal |
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Volume |
27 |
Issue |
7 |
Pages |
1457-1469 |
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Keywords |
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Abstract |
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Programme |
330, 388 |
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Thesis |
Bachelor's thesis |
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Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1365-2486 |
ISBN |
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Medium |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
7987 |
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| Permanent link to this record |
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Author |
Tammy E. Davies, Ana P.B. Carneiro, Marguerite Tarzia, Ewan Wakefield, Janos C. Hennicke, Morten Frederiksen, Erpur Snær Hansen, Bruna Campos, Carolina Hazin, Ben Lascelles, Tycho Anker-Nilssen, Hólmfríður Arnardóttir, Robert T. Barrett, Manuel Biscoito, Loïc Bollache, Thierry Boulinier, Paulo Catry, Filipe R. Ceia, Olivier Chastel, Signe Christensen-Dalsgaard, Marta Cruz-Flores, Jóhannis Danielsen, Francis Daunt, Euan Dunn, Carsten Egevang, Ana Isabel Fagundes, Annette L. Fayet, Jérôme Fort, Robert W. Furness, Olivier Gilg, Jacob González-Solís, José Pedro Granadeiro, David Grémillet, Tim Guilford, Sveinn Are Hanssen, Michael P. Harris, April Hedd, Nicholas Per Huffeldt, Mark Jessopp, Yann Kolbeinsson, Johannes Krietsch, Johannes Lang, Jannie Fries Linnebjerg, Svein-Håkon Lorentsen, Jeremy Madeiros, Ellen Magnusdottir, Mark L. Mallory, Laura McFarlane Tranquilla, Flemming R. Merkel, Teresa Militão, Børge Moe, William A. Montevecchi, Virginia Morera-Pujol, Anders Mosbech, Verónica Neves, Mark A. Newell, Bergur Olsen, Vitor H. Paiva, Hans-Ulrich Peter, Aevar Petersen, Richard A. Phillips, Iván Ramírez, Jaime A. Ramos, Raül Ramos, Robert A. Ronconi, Peter G. Ryan, Niels Martin Schmidt, Ingvar A. Sigurðsson, Benoît Sittler, Harald Steen, Iain J. Stenhouse, Hallvard Strøm, Geir H. R. Systad, Paul Thompson, Thorkell L. Thórarinsson, Rob S.A. van Bemmelen, Sarah Wanless, Francis Zino, Maria P. Dias |
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Title |
Multispecies tracking reveals a major seabird hotspot in the North Atlantic |
Type |
Journal |
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Year |
2021 |
Publication |
Conservation Letters |
Abbreviated Journal |
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Volume |
14 |
Issue |
5 |
Pages |
e12824 |
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Keywords |
area beyond national jurisdiction Atlantic biologging conservation high seas marine protected area regional seas convention |
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Abstract |
The conservation of migratory marine species, including pelagic seabirds, is challenging because their movements span vast distances frequently beyond national jurisdictions. Here, we aim to identify important aggregations of seabirds in the North Atlantic to inform ongoing regional conservation efforts. Using tracking, phenology, and population data, we mapped the abundance and diversity of 21 seabird species. This revealed a major hotspot associated with a discrete area of the subpolar frontal zone, used annually by 2.9–5 million seabirds from ≥56 colonies in the Atlantic: the first time this magnitude of seabird concentrations has been documented in the high seas. The hotspot is temporally stable and amenable to site-based conservation and is under consideration as a marine protected area by the OSPAR Commission. Protection could help mitigate current and future threats facing species in the area. Overall, our approach provides an exemplar data-driven pathway for future conservation efforts on the high seas. |
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Programme |
330,333,388,1036 |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Publisher |
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Place of Publication |
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Summary Language |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1755-263X |
ISBN |
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Medium |
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Area |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
8293 |
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| Permanent link to this record |
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Author |
Florian Orgeret, Ryan R. Reisinger, Tegan Carpenter-Kling, Danielle Z. Keys, Alexandre Corbeau, Charles-André Bost, Henri Weimerskirch, Pierre A. Pistorius |
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Title |
Spatial segregation in a sexually dimorphic central place forager: Competitive exclusion or niche divergence? |
Type |
Journal |
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Year |
2021 |
Publication |
Journal of Animal Ecology |
Abbreviated Journal |
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Volume |
90 |
Issue |
10 |
Pages |
2404-2420 |
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Keywords |
bio-logging central place foraging ecological niche theory intraspecific competition kernel density estimates resource selection functions sexual segregation wandering albatross |
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Abstract |
Sexual competition is increasingly recognized as an important selective pressure driving species distributions. However, few studies have investigated the relative importance of interpopulation versus intrapopulation competition in relation to habitat availability and selection. To explain spatial segregation between sexes that often occurs in non-territorial and central place foragers, such as seabirds, two hypotheses are commonly used. The ‘competitive exclusion’ hypothesis states that dominant individuals should exclude subordinate individuals through direct competition, whereas the ‘niche divergence’ hypothesis states that segregation occurs due to past competition and habitat specialization. We tested these hypotheses in two populations of an extreme wide-ranging and sexually dimorphic seabird, investigating the relative role of intrapopulation and interpopulation competition in influencing sex-specific distribution and habitat preferences. Using GPS loggers, we tracked 192 wandering albatrosses Diomedea exulans during four consecutive years (2016–2019), from two neighbouring populations in the Southern Ocean (Prince Edward and Crozet archipelagos). We simulated pseudo-tracks to create a null spatial distribution and used Kernel Density Estimates (KDE) and Resource Selection Functions (RSF) to distinguish the relative importance of within- versus between-population competition. Kernel Density Estimates showed that only intrapopulation sexual segregation was significant for each monitoring year, and that tracks between the two colonies resulted in greater overlap than expected from the null distribution, especially for the females. RSF confirmed these results and highlighted key at-sea foraging areas, even if the estimated of at-sea densities were extremely low. These differences in selected areas between sites and sexes were, however, associated with high interannual variability in habitat preferences, with no clear specific preferences per site and sex. Our results suggest that even with low at-sea population densities, historic intrapopulation competition in wide-ranging seabirds may have led to sexual dimorphism and niche specialization, favouring the ‘niche divergence’ hypothesis. In this study, we provide a protocol to study competition within as well as between populations of central place foragers. This is relevant for understanding their distribution patterns and population regulation, which could potentially improve management of threatened populations. |
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Programme |
109,394 |
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Campaign |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Publisher |
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Place of Publication |
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Editor |
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Language |
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Summary Language |
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Original Title |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1365-2656 |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
8093 |
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| Permanent link to this record |
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Author |
Hajo Eicken, Finn Danielsen, Josephine-Mary Sam, Maryann Fidel, Noor Johnson, Michael K Poulsen, Olivia A Lee, Katie V Spellman, Lisbeth Iversen, Peter Pulsifer, Martin Enghoff |
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Title |
Connecting Top-Down and Bottom-Up Approaches in Environmental Observing |
Type |
Journal |
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Year |
2021 |
Publication |
BioScience |
Abbreviated Journal |
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Volume |
71 |
Issue |
5 |
Pages |
467-483 |
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Abstract |
Effective responses to rapid environmental change rely on observations to inform planning and decision-making. Reviewing literature from 124 programs across the globe and analyzing survey data for 30 Arctic community-based monitoring programs, we compare top-down, large-scale program driven approaches with bottom-up approaches initiated and steered at the community level. Connecting these two approaches and linking to Indigenous and local knowledge yields benefits including improved information products and enhanced observing program efficiency and sustainability. We identify core principles central to such improved links: matching observing program aims, scales, and ability to act on information; matching observing program and community priorities; fostering compatibility in observing methodology and data management; respect of Indigenous intellectual property rights and the implementation of free, prior, and informed consent; creating sufficient organizational support structures; and ensuring sustained community members’ commitment. Interventions to overcome challenges in adhering to these principles are discussed. |
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Programme |
1090,1206 |
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Thesis |
Bachelor's thesis |
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ISSN |
0006-3568 |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
8249 |
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