39 results on '"Schoombie, Stefan"'
Search Results
2. Habitat model forecasts suggest potential redistribution of marine predators in the southern Indian Ocean
- Author
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Reisinger, Ryan R., Corney, Stuart, Raymond, Ben, Lombard, Amanda T., Bester, Marthán N., Crawford, Robert J. M., Davies, Delia, de Bruyn, P. J. Nico, Dilley, Ben J., Kirkman, Stephen P., Makhado, Azwianewi B., Ryan, Peter G., Schoombie, Stefan, Stevens, Kim L., Tosh, Cheryl A., Wege, Mia, Whitehead, T. Otto, Sumner, Michael D., Wotherspoon, Simon, Friedlaender, Ari S., Cotté, Cedric, Hindell, Mark A., Ropert-Coudert, Yan, and Pistorius, Pierre A.
- Published
- 2022
3. Automated extraction of bank angles from bird-borne video footage using open-source software
- Author
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Schoombie, Stefan, Schoombie, Janine, Brink, Christiaan W., Stevens, Kim L., Jones, Christopher W., Risi, Michelle M., and Ryan, Peter G.
- Published
- 2019
- Full Text
- View/download PDF
4. Habitat preferences of Phoebetria albatrosses in sympatry and allopatry
- Author
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Bentley, Lily K., Phillips, Richard A., Carpenter‐Kling, Tegan, Crawford, Robert J. M., Cuthbert, Richard J., Delord, Karine, Dilley, Ben J., Makhado, Azwianewi B., Miller, Peter I., Oppel, Steffen, Pistorius, Pierre A., Ryan, Peter G., Schoombie, Stefan, Weimerskirch, Henri, Manica, Andrea, Bentley, Lily K., Phillips, Richard A., Carpenter‐Kling, Tegan, Crawford, Robert J. M., Cuthbert, Richard J., Delord, Karine, Dilley, Ben J., Makhado, Azwianewi B., Miller, Peter I., Oppel, Steffen, Pistorius, Pierre A., Ryan, Peter G., Schoombie, Stefan, Weimerskirch, Henri, and Manica, Andrea
- Abstract
Aim: Competition is often proposed to drive niche segregation along multiple axes in speciose communities. Understanding spatial partitioning of foraging areas is particularly important in species that are constrained to a central place. We present a natural experiment examining variation in habitat preferences of congeneric Southern Ocean predators in sympatry and allopatry. Our aim was to ascertain consistency of habitat preferences within species, and to test whether preferences changed in the presence of the congener. Location: Southern Hemisphere. Taxon: Multiple colonies of both species within the genus Phoebetria (sooty albatrosses). Methods: The two Phoebetria albatrosses breed on islands located from ~37–55°S – sooty albatrosses (P. fusca) in the north and light-mantled albatrosses (P. palpebrata) in the south – with sympatric overlap at locations ~46–49°S. We analysed GPS and PTT tracks from 87 individuals and multiple remotely sensed environmental variables using GAMs, to determine and compare the key factors influencing habitat preference for each species at each breeding colony. Results While foraging habitat preferences are consistent in light-mantled albatrosses, there is divergence of preferences in sooty albatrosses depending on whether they are in sympatry with their congener or in allopatry. Main Conclusions This study represents the most comprehensive work on this genus to date and highlights how habitat preferences and behavioural plasticity may influence species distributions under different competitive conditions.
- Published
- 2024
5. Decadal changes in plastic litter regurgitated by albatrosses and giant petrels at sub-Antarctic Marion Island
- Author
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Perold, Vonica, Schoombie, Stefan, and Ryan, Peter G.
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- 2020
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6. A novel approach to seabird posture estimation: finding roll and yaw angles of dynamic soaring albatrosses using tri-axial magnetometers
- Author
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Schoombie, Stefan, primary, Wilson, R. P., additional, and Ryan, P. G., additional
- Published
- 2023
- Full Text
- View/download PDF
7. Leaping into the future: Current application and future direction of computer vision and artificial intelligence in marine sciences in South Africa
- Author
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da Silva, Charlene, primary, Samaai, Toufiek, additional, Kerwath, Sven, additional, Adams, Luther, additional, Watson, Katie, additional, Bernard, Anthony, additional, van der Heever, Grant, additional, Angel, Andrea, additional, Schoombie, Stefan, additional, Frainer, Guilherme, additional, Franken, Mari-Lisa, additional, Rees, Adam, additional, and Paterson, Angus, additional
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- 2023
- Full Text
- View/download PDF
8. Habitat modelling of tracking data from multiple marine predators identifies important areas in the Southern Indian Ocean
- Author
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Reisinger, Ryan R., Raymond, Ben, Hindell, Mark A., Bester, Marthán N., Crawford, Robert J. M., Davies, Delia, de Bruyn, P.J. Nico, Dilley, Ben J., Kirkman, Stephen P., Makhado, Azwianewi B., Ryan, Peter G., Schoombie, Stefan, Stevens, Kim, Sumner, Michael D., Tosh, Cheryl A., Wege, Mia, Whitehead, Thomas Otto, Wotherspoon, Simon, and Pistorius, Pierre A.
- Published
- 2018
9. Plumage and bill abnormalities in albatross chicks on Marion Island
- Author
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Risi, Michelle M., Jones, Christopher W., Schoombie, Stefan, and Ryan, Peter G.
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- 2019
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10. The foraging range of Great Shearwaters (Ardenna gravis) breeding on Gough Island
- Author
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Schoombie, Stefan, Dilley, Ben J., Davies, Delia, and Ryan, Peter G.
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- 2018
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11. Global assessment of marine plastic exposure risk for oceanic birds
- Author
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Clark, Bethany L., primary, Carneiro, Ana P. B., additional, Pearmain, Elizabeth J., additional, Rouyer, Marie-Morgane, additional, Clay, Thomas A., additional, Cowger, Win, additional, Phillips, Richard A., additional, Manica, Andrea, additional, Hazin, Carolina, additional, Eriksen, Marcus, additional, González-Solís, Jacob, additional, Adams, Josh, additional, Albores-Barajas, Yuri V., additional, Alfaro-Shigueto, Joanna, additional, Alho, Maria Saldanha, additional, Araujo, Deusa Teixeira, additional, Arcos, José Manuel, additional, Arnould, John P. Y., additional, Barbosa, Nadito J. P., additional, Barbraud, Christophe, additional, Beard, Annalea M., additional, Beck, Jessie, additional, Bell, Elizabeth A., additional, Bennet, Della G., additional, Berlincourt, Maud, additional, Biscoito, Manuel, additional, Bjørnstad, Oskar K., additional, Bolton, Mark, additional, Booth Jones, Katherine A., additional, Borg, John J., additional, Bourgeois, Karen, additional, Bretagnolle, Vincent, additional, Bried, Joël, additional, Briskie, James V., additional, Brooke, M. de L., additional, Brownlie, Katherine C., additional, Bugoni, Leandro, additional, Calabrese, Licia, additional, Campioni, Letizia, additional, Carey, Mark J., additional, Carle, Ryan D., additional, Carlile, Nicholas, additional, Carreiro, Ana R., additional, Catry, Paulo, additional, Catry, Teresa, additional, Cecere, Jacopo G., additional, Ceia, Filipe R., additional, Cherel, Yves, additional, Choi, Chang-Yong, additional, Cianchetti-Benedetti, Marco, additional, Clarke, Rohan H., additional, Cleeland, Jaimie B., additional, Colodro, Valentina, additional, Congdon, Bradley C., additional, Danielsen, Jóhannis, additional, De Pascalis, Federico, additional, Deakin, Zoe, additional, Dehnhard, Nina, additional, Dell’Omo, Giacomo, additional, Delord, Karine, additional, Descamps, Sébastien, additional, Dilley, Ben J., additional, Dinis, Herculano A., additional, Dubos, Jerome, additional, Dunphy, Brendon J., additional, Emmerson, Louise M., additional, Fagundes, Ana Isabel, additional, Fayet, Annette L., additional, Felis, Jonathan J., additional, Fischer, Johannes H., additional, Freeman, Amanda N. D., additional, Fromant, Aymeric, additional, Gaibani, Giorgia, additional, García, David, additional, Gjerdrum, Carina, additional, Gomes, Ivandra Soeli Gonçalves Correia, additional, Forero, Manuela G., additional, Granadeiro, José P., additional, Grecian, W. James, additional, Grémillet, David, additional, Guilford, Tim, additional, Hallgrimsson, Gunnar Thor, additional, Halpin, Luke R., additional, Hansen, Erpur Snær, additional, Hedd, April, additional, Helberg, Morten, additional, Helgason, Halfdan H., additional, Henry, Leeann M., additional, Hereward, Hannah F. R., additional, Hernandez-Montero, Marcos, additional, Hindell, Mark A., additional, Hodum, Peter J., additional, Imperio, Simona, additional, Jaeger, Audrey, additional, Jessopp, Mark, additional, Jodice, Patrick G. R., additional, Jones, Carl G., additional, Jones, Christopher W., additional, Jónsson, Jón Einar, additional, Kane, Adam, additional, Kapelj, Sven, additional, Kim, Yuna, additional, Kirk, Holly, additional, Kolbeinsson, Yann, additional, Kraemer, Philipp L., additional, Krüger, Lucas, additional, Lago, Paulo, additional, Landers, Todd J., additional, Lavers, Jennifer L., additional, Le Corre, Matthieu, additional, Leal, Andreia, additional, Louzao, Maite, additional, Madeiros, Jeremy, additional, Magalhães, Maria, additional, Mallory, Mark L., additional, Masello, Juan F., additional, Massa, Bruno, additional, Matsumoto, Sakiko, additional, McDuie, Fiona, additional, McFarlane Tranquilla, Laura, additional, Medrano, Fernando, additional, Metzger, Benjamin J., additional, Militão, Teresa, additional, Montevecchi, William A., additional, Montone, Rosalinda C., additional, Navarro-Herrero, Leia, additional, Neves, Verónica C., additional, Nicholls, David G., additional, Nicoll, Malcolm A. C., additional, Norris, Ken, additional, Oppel, Steffen, additional, Oro, Daniel, additional, Owen, Ellie, additional, Padget, Oliver, additional, Paiva, Vítor H., additional, Pala, David, additional, Pereira, Jorge M., additional, Péron, Clara, additional, Petry, Maria V., additional, de Pina, Admilton, additional, Pina, Ariete T. Moreira, additional, Pinet, Patrick, additional, Pistorius, Pierre A., additional, Pollet, Ingrid L., additional, Porter, Benjamin J., additional, Poupart, Timothée A., additional, Powell, Christopher D. L., additional, Proaño, Carolina B., additional, Pujol-Casado, Júlia, additional, Quillfeldt, Petra, additional, Quinn, John L., additional, Raine, Andre F., additional, Raine, Helen, additional, Ramírez, Iván, additional, Ramos, Jaime A., additional, Ramos, Raül, additional, Ravache, Andreas, additional, Rayner, Matt J., additional, Reid, Timothy A., additional, Robertson, Gregory J., additional, Rocamora, Gerard J., additional, Rollinson, Dominic P., additional, Ronconi, Robert A., additional, Rotger, Andreu, additional, Rubolini, Diego, additional, Ruhomaun, Kevin, additional, Ruiz, Asunción, additional, Russell, James C., additional, Ryan, Peter G., additional, Saldanha, Sarah, additional, Sanz-Aguilar, Ana, additional, Sardà-Serra, Mariona, additional, Satgé, Yvan G., additional, Sato, Katsufumi, additional, Schäfer, Wiebke C., additional, Schoombie, Stefan, additional, Shaffer, Scott A., additional, Shah, Nirmal, additional, Shoji, Akiko, additional, Shutler, Dave, additional, Sigurðsson, Ingvar A., additional, Silva, Mónica C., additional, Small, Alison E., additional, Soldatini, Cecilia, additional, Strøm, Hallvard, additional, Surman, Christopher A., additional, Takahashi, Akinori, additional, Tatayah, Vikash R. V., additional, Taylor, Graeme A., additional, Thomas, Robert J., additional, Thompson, David R., additional, Thompson, Paul M., additional, Thórarinsson, Thorkell L., additional, Vicente-Sastre, Diego, additional, Vidal, Eric, additional, Wakefield, Ewan D., additional, Waugh, Susan M., additional, Weimerskirch, Henri, additional, Wittmer, Heiko U., additional, Yamamoto, Takashi, additional, Yoda, Ken, additional, Zavalaga, Carlos B., additional, Zino, Francis J., additional, and Dias, Maria P., additional
- Published
- 2023
- Full Text
- View/download PDF
12. Seabird morphology determines operational wind speeds, tolerable maxima, and responses to extremes
- Author
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Nourani, Elham, primary, Safi, Kamran, additional, de Grissac, Sophie, additional, Anderson, David J., additional, Cole, Nik C., additional, Fell, Adam, additional, Grémillet, David, additional, Lempidakis, Emmanouil, additional, Lerma, Miriam, additional, McKee, Jennifer L., additional, Pichegru, Lorien, additional, Provost, Pascal, additional, Rattenborg, Niels C., additional, Ryan, Peter G., additional, Santos, Carlos D., additional, Schoombie, Stefan, additional, Tatayah, Vikash, additional, Weimerskirch, Henri, additional, Wikelski, Martin, additional, and Shepard, Emily L.C., additional
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- 2023
- Full Text
- View/download PDF
13. Global assessment of marine plastic exposure risk for oceanic birds
- Author
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Clark, Bethany L., Carneiro, Ana P. B., Pearmain, Elizabeth J., Rouyer, Marie-morgane, Clay, Thomas A., Cowger, Win, Phillips, Richard A., Manica, Andrea, Hazin, Carolina, Eriksen, Marcus, González-solís, Jacob, Adams, Josh, Albores-barajas, Yuri V., Alfaro-shigueto, Joanna, Alho, Maria Saldanha, Araujo, Deusa Teixeira, Arcos, José Manuel, Arnould, John P. Y., Barbosa, Nadito J. P., Barbraud, Christophe, Beard, Annalea M., Beck, Jessie, Bell, Elizabeth A., Bennet, Della G., Berlincourt, Maud, Biscoito, Manuel, Bjørnstad, Oskar K., Bolton, Mark, Booth Jones, Katherine A., Borg, John J., Bourgeois, Karen, Bretagnolle, Vincent, Bried, Joël, Briskie, James V., Brooke, M. De L., Brownlie, Katherine C., Bugoni, Leandro, Calabrese, Licia, Campioni, Letizia, Carey, Mark J., Carle, Ryan D., Carlile, Nicholas, Carreiro, Ana R., Catry, Paulo, Catry, Teresa, Cecere, Jacopo G., Ceia, Filipe R., Cherel, Yves, Choi, Chang-yong, Cianchetti-benedetti, Marco, Clarke, Rohan H., Cleeland, Jaimie B., Colodro, Valentina, Congdon, Bradley C., Danielsen, Jóhannis, De Pascalis, Federico, Deakin, Zoe, Dehnhard, Nina, Dell’omo, Giacomo, Delord, Karine, Descamps, Sébastien, Dilley, Ben J., Dinis, Herculano A., Dubos, Jerome, Dunphy, Brendon J., Emmerson, Louise M., Fagundes, Ana Isabel, Fayet, Annette L., Felis, Jonathan J., Fischer, Johannes H., Freeman, Amanda N. D., Fromant, Aymeric, Gaibani, Giorgia, García, David, Gjerdrum, Carina, Gomes, Ivandra Soeli Gonçalves Correia, Forero, Manuela G., Granadeiro, José P., Grecian, W. James, Grémillet, David, Guilford, Tim, Hallgrimsson, Gunnar Thor, Halpin, Luke R., Hansen, Erpur Snær, Hedd, April, Helberg, Morten, Helgason, Halfdan H., Henry, Leeann M., Hereward, Hannah F. R., Hernandez-montero, Marcos, Hindell, Mark A., Hodum, Peter J., Imperio, Simona, Jaeger, Audrey, Jessopp, Mark, Jodice, Patrick G. R., Jones, Carl G., Jones, Christopher W., Jónsson, Jón Einar, Kane, Adam, Kapelj, Sven, Kim, Yuna, Kirk, Holly, Kolbeinsson, Yann, Kraemer, Philipp L., Krüger, Lucas, Lago, Paulo, Landers, Todd J., Lavers, Jennifer L., Le Corre, Matthieu, Leal, Andreia, Louzao, Maite, Madeiros, Jeremy, Magalhães, Maria, Mallory, Mark L., Masello, Juan F., Massa, Bruno, Matsumoto, Sakiko, Mcduie, Fiona, Mcfarlane Tranquilla, Laura, Medrano, Fernando, Metzger, Benjamin J., Militão, Teresa, Montevecchi, William A., Montone, Rosalinda C., Navarro-herrero, Leia, Neves, Verónica C., Nicholls, David G., Nicoll, Malcolm A. C., Norris, Ken, Oppel, Steffen, Oro, Daniel, Owen, Ellie, Padget, Oliver, Paiva, Vítor H., Pala, David, Pereira, Jorge M., Péron, Clara, Petry, Maria V., De Pina, Admilton, Pina, Ariete T. Moreira, Pinet, Patrick, Pistorius, Pierre A., Pollet, Ingrid L., Porter, Benjamin J., Poupart, Timothée A., Powell, Christopher D. L., Proaño, Carolina B., Pujol-casado, Júlia, Quillfeldt, Petra, Quinn, John L., Raine, Andre F., Raine, Helen, Ramírez, Iván, Ramos, Jaime A., Ramos, Raül, Ravache, Andreas, Rayner, Matt J., Reid, Timothy A., Robertson, Gregory J., Rocamora, Gerard J., Rollinson, Dominic P., Ronconi, Robert A., Rotger, Andreu, Rubolini, Diego, Ruhomaun, Kevin, Ruiz, Asunción, Russell, James C., Ryan, Peter G., Saldanha, Sarah, Sanz-aguilar, Ana, Sardà-serra, Mariona, Satgé, Yvan G., Sato, Katsufumi, Schäfer, Wiebke C., Schoombie, Stefan, Shaffer, Scott A., Shah, Nirmal, Shoji, Akiko, Shutler, Dave, Sigurðsson, Ingvar A., Silva, Mónica C., Small, Alison E., Soldatini, Cecilia, Strøm, Hallvard, Surman, Christopher A., Takahashi, Akinori, Tatayah, Vikash R. V., Taylor, Graeme A., Thomas, Robert J., Thompson, David R., Thompson, Paul M., Thórarinsson, Thorkell L., Vicente-sastre, Diego, Vidal, Eric, Wakefield, Ewan D., Waugh, Susan M., Weimerskirch, Henri, Wittmer, Heiko U., Yamamoto, Takashi, Yoda, Ken, Zavalaga, Carlos B., Zino, Francis J., Dias, Maria P., Clark, Bethany L., Carneiro, Ana P. B., Pearmain, Elizabeth J., Rouyer, Marie-morgane, Clay, Thomas A., Cowger, Win, Phillips, Richard A., Manica, Andrea, Hazin, Carolina, Eriksen, Marcus, González-solís, Jacob, Adams, Josh, Albores-barajas, Yuri V., Alfaro-shigueto, Joanna, Alho, Maria Saldanha, Araujo, Deusa Teixeira, Arcos, José Manuel, Arnould, John P. Y., Barbosa, Nadito J. P., Barbraud, Christophe, Beard, Annalea M., Beck, Jessie, Bell, Elizabeth A., Bennet, Della G., Berlincourt, Maud, Biscoito, Manuel, Bjørnstad, Oskar K., Bolton, Mark, Booth Jones, Katherine A., Borg, John J., Bourgeois, Karen, Bretagnolle, Vincent, Bried, Joël, Briskie, James V., Brooke, M. De L., Brownlie, Katherine C., Bugoni, Leandro, Calabrese, Licia, Campioni, Letizia, Carey, Mark J., Carle, Ryan D., Carlile, Nicholas, Carreiro, Ana R., Catry, Paulo, Catry, Teresa, Cecere, Jacopo G., Ceia, Filipe R., Cherel, Yves, Choi, Chang-yong, Cianchetti-benedetti, Marco, Clarke, Rohan H., Cleeland, Jaimie B., Colodro, Valentina, Congdon, Bradley C., Danielsen, Jóhannis, De Pascalis, Federico, Deakin, Zoe, Dehnhard, Nina, Dell’omo, Giacomo, Delord, Karine, Descamps, Sébastien, Dilley, Ben J., Dinis, Herculano A., Dubos, Jerome, Dunphy, Brendon J., Emmerson, Louise M., Fagundes, Ana Isabel, Fayet, Annette L., Felis, Jonathan J., Fischer, Johannes H., Freeman, Amanda N. D., Fromant, Aymeric, Gaibani, Giorgia, García, David, Gjerdrum, Carina, Gomes, Ivandra Soeli Gonçalves Correia, Forero, Manuela G., Granadeiro, José P., Grecian, W. James, Grémillet, David, Guilford, Tim, Hallgrimsson, Gunnar Thor, Halpin, Luke R., Hansen, Erpur Snær, Hedd, April, Helberg, Morten, Helgason, Halfdan H., Henry, Leeann M., Hereward, Hannah F. R., Hernandez-montero, Marcos, Hindell, Mark A., Hodum, Peter J., Imperio, Simona, Jaeger, Audrey, Jessopp, Mark, Jodice, Patrick G. R., Jones, Carl G., Jones, Christopher W., Jónsson, Jón Einar, Kane, Adam, Kapelj, Sven, Kim, Yuna, Kirk, Holly, Kolbeinsson, Yann, Kraemer, Philipp L., Krüger, Lucas, Lago, Paulo, Landers, Todd J., Lavers, Jennifer L., Le Corre, Matthieu, Leal, Andreia, Louzao, Maite, Madeiros, Jeremy, Magalhães, Maria, Mallory, Mark L., Masello, Juan F., Massa, Bruno, Matsumoto, Sakiko, Mcduie, Fiona, Mcfarlane Tranquilla, Laura, Medrano, Fernando, Metzger, Benjamin J., Militão, Teresa, Montevecchi, William A., Montone, Rosalinda C., Navarro-herrero, Leia, Neves, Verónica C., Nicholls, David G., Nicoll, Malcolm A. C., Norris, Ken, Oppel, Steffen, Oro, Daniel, Owen, Ellie, Padget, Oliver, Paiva, Vítor H., Pala, David, Pereira, Jorge M., Péron, Clara, Petry, Maria V., De Pina, Admilton, Pina, Ariete T. Moreira, Pinet, Patrick, Pistorius, Pierre A., Pollet, Ingrid L., Porter, Benjamin J., Poupart, Timothée A., Powell, Christopher D. L., Proaño, Carolina B., Pujol-casado, Júlia, Quillfeldt, Petra, Quinn, John L., Raine, Andre F., Raine, Helen, Ramírez, Iván, Ramos, Jaime A., Ramos, Raül, Ravache, Andreas, Rayner, Matt J., Reid, Timothy A., Robertson, Gregory J., Rocamora, Gerard J., Rollinson, Dominic P., Ronconi, Robert A., Rotger, Andreu, Rubolini, Diego, Ruhomaun, Kevin, Ruiz, Asunción, Russell, James C., Ryan, Peter G., Saldanha, Sarah, Sanz-aguilar, Ana, Sardà-serra, Mariona, Satgé, Yvan G., Sato, Katsufumi, Schäfer, Wiebke C., Schoombie, Stefan, Shaffer, Scott A., Shah, Nirmal, Shoji, Akiko, Shutler, Dave, Sigurðsson, Ingvar A., Silva, Mónica C., Small, Alison E., Soldatini, Cecilia, Strøm, Hallvard, Surman, Christopher A., Takahashi, Akinori, Tatayah, Vikash R. V., Taylor, Graeme A., Thomas, Robert J., Thompson, David R., Thompson, Paul M., Thórarinsson, Thorkell L., Vicente-sastre, Diego, Vidal, Eric, Wakefield, Ewan D., Waugh, Susan M., Weimerskirch, Henri, Wittmer, Heiko U., Yamamoto, Takashi, Yoda, Ken, Zavalaga, Carlos B., Zino, Francis J., and Dias, Maria P.
- Abstract
Plastic pollution is distributed patchily around the world’s oceans. Likewise, marine organisms that are vulnerable to plastic ingestion or entanglement have uneven distributions. Understanding where wildlife encounters plastic is crucial for targeting research and mitigation. Oceanic seabirds, particularly petrels, frequently ingest plastic, are highly threatened, and cover vast distances during foraging and migration. However, the spatial overlap between petrels and plastics is poorly understood. Here we combine marine plastic density estimates with individual movement data for 7137 birds of 77 petrel species to estimate relative exposure risk. We identify high exposure risk areas in the Mediterranean and Black seas, and the northeast Pacific, northwest Pacific, South Atlantic and southwest Indian oceans. Plastic exposure risk varies greatly among species and populations, and between breeding and non-breeding seasons. Exposure risk is disproportionately high for Threatened species. Outside the Mediterranean and Black seas, exposure risk is highest in the high seas and Exclusive Economic Zones (EEZs) of the USA, Japan, and the UK. Birds generally had higher plastic exposure risk outside the EEZ of the country where they breed. We identify conservation and research priorities, and highlight that international collaboration is key to addressing the impacts of marine plastic on wide-ranging species.
- Published
- 2023
- Full Text
- View/download PDF
14. Global assessment of marine plastic exposure risk for oceanic birds
- Author
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Cambridge Conservation Initiative, Fondation Prince Albert II de Monaco, Natural Environment Research Council (UK), Clark, Bethany L., Carneiro, Ana P. B., Pearmain, Elizabeth J., Rouyer, Marie-Morgane, Clay, Thomas A., Cowger, Win, Phillips, Richard A., Manica, Andrea, Hazin, Carolina, Eriksen, Marcus, González-Solís, Jacob, Adams, Josh, Albores-Barajas, Yuri V., Alfaro-Shigueto, Joanna, Alho, Maria Saldanha, Araujo, Deusa Teixeira, Arcos, José Manuel, Arnould, John P. Y., Barbosa, Nadito J. P., Barbraud, Christophe, Beard, Annalea M., Beck, Jessie, Bell, Elizabeth A., Bennet, Della G., Berlincourt, Maud, Biscoito, Manuel, Bjørnstad, Oskar K., Bolton, Mark, Booth Jones, Katherine A., Borg, John J., Bourgeois, Karen, Bretagnolle, Vincent, Bried, Joël, Briskie, James V., Brooke, M de L., Brownlie, Katherine C., Bugoni, Leandro, Calabrese, Licia, Campioni, Letizia, Carey, Mark J., Carle, Ryan D., Carlile, Nicholas, Carreiro, Ana R., Catry, Paulo, Catry, Teresa, Cecere, Jacopo G., Ceia, Filipe R., Cherel, Yves, Choi, Chang-Yong, Cianchetti-Benedetti, Marco, Clarke, Rohan H., Cleeland, Jaimie B., Colodro, Valentina, Congdon, Bradley C., Danielsen, Jóhannis, De Pascalis, Federico, Deakin, Zoe, Dehnhard, Nina, Dell'Omo, Giacomo, Delord, Karine, Descamps, Sébastien, Dilley, Ben J., Dinis, Herculano A., Dubos, Jerome, Dunphy, Brendon J., Emmerson, Louise M., Fagundes, Ana Isabel, Fayet, Annette L., Felis, Jonathan J., Fischer, Johannes H., Freeman, Amanda N. D., Fromant, Aymeric, Gaibani, Giorgia, García, David, Gjerdrum, Carina, Gomes, Ivandra Soeli Gonçalves Correia, Forero, Manuela G., Granadeiro, José P., Grecian, W James, Grémillet, David, Guilford, Tim, Hallgrimsson, Gunnar Thor, Halpin, Luke R., Hansen, Erpur Snær, Hedd, April, Helberg, Morten, Helgason, Halfdan H., Henry, Leeann M., Hereward, Hannah F. R., Hernandez-Montero, Marcos, Hindell, Mark A., Hodum, Peter J., Imperio, Simona, Jaeger, Audrey, Jessopp, Mark, Jodice, Patrick G. R., Jones, Carl G, Jones, Christopher W., Jónsson, Jón Einar, Kane, Adam, Kapelj, Sven, Kim, Yuna, Kirk, Holly, Kolbeinsson, Yann, Kraemer, Philipp L., Krüger, Lucas, Lago, Paulo, Landers, Todd J., Lavers, Jennifer L., Le Corre, Matthieu, Leal, Andreia, Louzao, Maite, Madeiros, Jeremy, Magalhães, Maria, Mallory, Mark L., Masello, Juan F., Massa, Bruno, Matsumoto, Sakiko, McDuie, Fiona, McFarlane Tranquilla, Laura, Medrano, Fernando, Metzger, Benjamin J., Militão, Teresa, Montevecchi, William A., Montone, Rosalinda C., Navarro-Herrero, Leia, Neves, Verónica C., Nicholls, David G., Nicoll, Malcolm A .C., Norris, Ken, Oppel, Steffen, Oro, Daniel, Owen, Ellie, Padget, Oliver, Paiva, Vítor H., Pala, David, Pereira, Jorge M., Péron, Clara, Petry, Maria V., de Pina, Admilton, Pina, Ariete T Moreira, Pinet, Patrick, Pistorius, Pierre A., Pollet, Ingrid L., Porter, Benjamin J., Poupart, Timothée A., Powell, Christopher D. L., Proaño, Carolina B., Pujol-Casado, Júlia, Quillfeldt, Petra, Quinn, John L., Raine, Andre F., Raine, Helen, Ramírez, Iván, Ramos, Jaime A., Ramos, Raül, Ravache, Andreas, Rayner, Matt J., Reid, Timothy A., Robertson, Gregory J., Rocamora, Gerard J., Rollinson, Dominic P., Ronconi, Robert A., Rotger, Andreu, Rubolini, Diego, Ruhomaun, Kevin, Ruiz, Asunción, Russell, James C., Ryan, Peter G., Saldanha, Sarah, Sanz-Aguilar, Ana, Sardà-Serra, Mariona, Satgé, Yvan G., Sato, Katsufumi, Schäfer, Wiebke C., Schoombie, Stefan, Shaffer, Scott A., Shah, Nirmal, Shoji, Akiko, Shutler, Dave, Sigurðsson, Ingvar A., Silva, Mónica C., Small, Alison E., Soldatini, Cecilia, Strøm, Hallvard, Surman, Christopher A., Takahashi, Akinori, Tatayah, Vikash R. V., Taylor, Graeme A., Thomas, Robert J., Thompson, David R., Thompson, Paul M., Thórarinsson, Thorkell L., Vicente-Sastre, Diego, Vidal, Eric, Wakefield, Ewan D., Waugh, Susan M., Weimerskirch, Henri, Wittmer, Heiko U., Yamamoto, Takashi, Yoda, Ken, Zavalaga, Carlos B., Zino, Francis J., Dias, Maria P., Cambridge Conservation Initiative, Fondation Prince Albert II de Monaco, Natural Environment Research Council (UK), Clark, Bethany L., Carneiro, Ana P. B., Pearmain, Elizabeth J., Rouyer, Marie-Morgane, Clay, Thomas A., Cowger, Win, Phillips, Richard A., Manica, Andrea, Hazin, Carolina, Eriksen, Marcus, González-Solís, Jacob, Adams, Josh, Albores-Barajas, Yuri V., Alfaro-Shigueto, Joanna, Alho, Maria Saldanha, Araujo, Deusa Teixeira, Arcos, José Manuel, Arnould, John P. Y., Barbosa, Nadito J. P., Barbraud, Christophe, Beard, Annalea M., Beck, Jessie, Bell, Elizabeth A., Bennet, Della G., Berlincourt, Maud, Biscoito, Manuel, Bjørnstad, Oskar K., Bolton, Mark, Booth Jones, Katherine A., Borg, John J., Bourgeois, Karen, Bretagnolle, Vincent, Bried, Joël, Briskie, James V., Brooke, M de L., Brownlie, Katherine C., Bugoni, Leandro, Calabrese, Licia, Campioni, Letizia, Carey, Mark J., Carle, Ryan D., Carlile, Nicholas, Carreiro, Ana R., Catry, Paulo, Catry, Teresa, Cecere, Jacopo G., Ceia, Filipe R., Cherel, Yves, Choi, Chang-Yong, Cianchetti-Benedetti, Marco, Clarke, Rohan H., Cleeland, Jaimie B., Colodro, Valentina, Congdon, Bradley C., Danielsen, Jóhannis, De Pascalis, Federico, Deakin, Zoe, Dehnhard, Nina, Dell'Omo, Giacomo, Delord, Karine, Descamps, Sébastien, Dilley, Ben J., Dinis, Herculano A., Dubos, Jerome, Dunphy, Brendon J., Emmerson, Louise M., Fagundes, Ana Isabel, Fayet, Annette L., Felis, Jonathan J., Fischer, Johannes H., Freeman, Amanda N. D., Fromant, Aymeric, Gaibani, Giorgia, García, David, Gjerdrum, Carina, Gomes, Ivandra Soeli Gonçalves Correia, Forero, Manuela G., Granadeiro, José P., Grecian, W James, Grémillet, David, Guilford, Tim, Hallgrimsson, Gunnar Thor, Halpin, Luke R., Hansen, Erpur Snær, Hedd, April, Helberg, Morten, Helgason, Halfdan H., Henry, Leeann M., Hereward, Hannah F. R., Hernandez-Montero, Marcos, Hindell, Mark A., Hodum, Peter J., Imperio, Simona, Jaeger, Audrey, Jessopp, Mark, Jodice, Patrick G. R., Jones, Carl G, Jones, Christopher W., Jónsson, Jón Einar, Kane, Adam, Kapelj, Sven, Kim, Yuna, Kirk, Holly, Kolbeinsson, Yann, Kraemer, Philipp L., Krüger, Lucas, Lago, Paulo, Landers, Todd J., Lavers, Jennifer L., Le Corre, Matthieu, Leal, Andreia, Louzao, Maite, Madeiros, Jeremy, Magalhães, Maria, Mallory, Mark L., Masello, Juan F., Massa, Bruno, Matsumoto, Sakiko, McDuie, Fiona, McFarlane Tranquilla, Laura, Medrano, Fernando, Metzger, Benjamin J., Militão, Teresa, Montevecchi, William A., Montone, Rosalinda C., Navarro-Herrero, Leia, Neves, Verónica C., Nicholls, David G., Nicoll, Malcolm A .C., Norris, Ken, Oppel, Steffen, Oro, Daniel, Owen, Ellie, Padget, Oliver, Paiva, Vítor H., Pala, David, Pereira, Jorge M., Péron, Clara, Petry, Maria V., de Pina, Admilton, Pina, Ariete T Moreira, Pinet, Patrick, Pistorius, Pierre A., Pollet, Ingrid L., Porter, Benjamin J., Poupart, Timothée A., Powell, Christopher D. L., Proaño, Carolina B., Pujol-Casado, Júlia, Quillfeldt, Petra, Quinn, John L., Raine, Andre F., Raine, Helen, Ramírez, Iván, Ramos, Jaime A., Ramos, Raül, Ravache, Andreas, Rayner, Matt J., Reid, Timothy A., Robertson, Gregory J., Rocamora, Gerard J., Rollinson, Dominic P., Ronconi, Robert A., Rotger, Andreu, Rubolini, Diego, Ruhomaun, Kevin, Ruiz, Asunción, Russell, James C., Ryan, Peter G., Saldanha, Sarah, Sanz-Aguilar, Ana, Sardà-Serra, Mariona, Satgé, Yvan G., Sato, Katsufumi, Schäfer, Wiebke C., Schoombie, Stefan, Shaffer, Scott A., Shah, Nirmal, Shoji, Akiko, Shutler, Dave, Sigurðsson, Ingvar A., Silva, Mónica C., Small, Alison E., Soldatini, Cecilia, Strøm, Hallvard, Surman, Christopher A., Takahashi, Akinori, Tatayah, Vikash R. V., Taylor, Graeme A., Thomas, Robert J., Thompson, David R., Thompson, Paul M., Thórarinsson, Thorkell L., Vicente-Sastre, Diego, Vidal, Eric, Wakefield, Ewan D., Waugh, Susan M., Weimerskirch, Henri, Wittmer, Heiko U., Yamamoto, Takashi, Yoda, Ken, Zavalaga, Carlos B., Zino, Francis J., and Dias, Maria P.
- Abstract
Plastic pollution is distributed patchily around the world's oceans. Likewise, marine organisms that are vulnerable to plastic ingestion or entanglement have uneven distributions. Understanding where wildlife encounters plastic is crucial for targeting research and mitigation. Oceanic seabirds, particularly petrels, frequently ingest plastic, are highly threatened, and cover vast distances during foraging and migration. However, the spatial overlap between petrels and plastics is poorly understood. Here we combine marine plastic density estimates with individual movement data for 7137 birds of 77 petrel species to estimate relative exposure risk. We identify high exposure risk areas in the Mediterranean and Black seas, and the northeast Pacific, northwest Pacific, South Atlantic and southwest Indian oceans. Plastic exposure risk varies greatly among species and populations, and between breeding and non-breeding seasons. Exposure risk is disproportionately high for Threatened species. Outside the Mediterranean and Black seas, exposure risk is highest in the high seas and Exclusive Economic Zones (EEZs) of the USA, Japan, and the UK. Birds generally had higher plastic exposure risk outside the EEZ of the country where they breed. We identify conservation and research priorities, and highlight that international collaboration is key to addressing the impacts of marine plastic on wide-ranging species.
- Published
- 2023
15. Natural recolonisation of sub-Antarctic Marion Island by Common Diving Petrels Pelecanoides urinatrix
- Author
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Connan, Maëlle, primary, Schoombie, Stefan, additional, Schoombie, Janine, additional, Dilley, Ben, additional, and Ryan, Peter G, additional
- Published
- 2022
- Full Text
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16. Effects of age, sex, colony and breeding phase on marine space use by Great Shearwaters Ardenna gravis in the South Atlantic
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Ronconi, Robert A., Schoombie, Stefan, Westgate, Andrew J., Wong, Sarah N. P., Koopman, Heather N., and Ryan, Peter G.
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- 2018
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17. The role of wingbeat frequency and amplitude in flight power
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Krishnan, Krishnamoorthy, primary, Garde, Baptiste, additional, Bennison, Ashley, additional, Cole, Nik C., additional, Cole, Emma-L., additional, Darby, Jamie, additional, Elliott, Kyle H., additional, Fell, Adam, additional, Gómez-Laich, Agustina, additional, de Grissac, Sophie, additional, Jessopp, Mark, additional, Lempidakis, Emmanouil, additional, Mizutani, Yuichi, additional, Prudor, Aurélien, additional, Quetting, Michael, additional, Quintana, Flavio, additional, Robotka, Hermina, additional, Roulin, Alexandre, additional, Ryan, Peter G., additional, Schalcher, Kim, additional, Schoombie, Stefan, additional, Tatayah, Vikash, additional, Tremblay, Fred, additional, Weimerskirch, Henri, additional, Whelan, Shannon, additional, Wikelski, Martin, additional, Yoda, Ken, additional, Hedenström, Anders, additional, and Shepard, Emily L. C., additional
- Published
- 2022
- Full Text
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18. The role of wingbeat frequency and amplitude in flight power
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Krishnan, Krishnamoorthy, Garde, Baptiste, Bennison, Ashley, Cole, Nik C., Cole, Emma-L., Darby, Jamie, Elliott, Kyle H., Fell, Adam, Gómez-Laich, Agustina, de Grissac, Sophie, Jessopp, Mark, Lempidakis, Emmanouil, Mizutani, Yuichi, Prudor, Aurélien, Quetting, Michael, Quintana, Flavio, Robotka, Hermina, Roulin, Alexandre, Ryan, Peter G., Schalcher, Kim, Schoombie, Stefan, Tatayah, Vikash, Tremblay, Fred, Weimerskirch, Henri, Whelan, Shannon, Wikelski, Martin, Yoda, Ken, Hedenström, Anders, Shepard, Emily L. C., Krishnan, Krishnamoorthy, Garde, Baptiste, Bennison, Ashley, Cole, Nik C., Cole, Emma-L., Darby, Jamie, Elliott, Kyle H., Fell, Adam, Gómez-Laich, Agustina, de Grissac, Sophie, Jessopp, Mark, Lempidakis, Emmanouil, Mizutani, Yuichi, Prudor, Aurélien, Quetting, Michael, Quintana, Flavio, Robotka, Hermina, Roulin, Alexandre, Ryan, Peter G., Schalcher, Kim, Schoombie, Stefan, Tatayah, Vikash, Tremblay, Fred, Weimerskirch, Henri, Whelan, Shannon, Wikelski, Martin, Yoda, Ken, Hedenström, Anders, and Shepard, Emily L. C.
- Abstract
Body-mounted accelerometers provide a new prospect for estimating power use in flying birds, as the signal varies with the two major kinematic determinants of aerodynamic power: wingbeat frequency and amplitude. Yet wingbeat frequency is sometimes used as a proxy for power output in isolation. There is, therefore, a need to understand which kinematic parameter birds vary and whether this is predicted by flight mode (e.g. accelerating, ascending/descending flight), speed or morphology. We investigate this using high-frequency acceleration data from (i) 14 species flying in the wild, (ii) two species flying in controlled conditions in a wind tunnel and (iii) a review of experimental and field studies. While wingbeat frequency and amplitude were positively correlated, R2 values were generally low, supporting the idea that parameters can vary independently. Indeed, birds were more likely to modulate wingbeat amplitude for more energy-demanding flight modes, including climbing and take-off. Nonetheless, the striking variability, even within species and flight types, highlights the complexity of describing the kinematic relationships, which appear sensitive to both the biological and physical context. Notwithstanding this, acceleration metrics that incorporate both kinematic parameters should be more robust proxies for power than wingbeat frequency alone.
- Published
- 2022
19. Seabird morphology determines operational wind speeds, tolerable maxima and responses to extremes
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Nourani, Elham, primary, Safi, Kamran, additional, de Grissac, Sophie, additional, Anderson, David J., additional, Cole, Nik C., additional, Fell, Adam, additional, Grémillet, David, additional, Lempidakis, Emmanouil, additional, Lerma, Miriam, additional, McKee, Jennifer L., additional, Pichegru, Lorien, additional, Provost, Pascal, additional, Rattenborg, Niels C., additional, Ryan, Peter G., additional, Santos, Carlos D., additional, Schoombie, Stefan, additional, Tatayah, Vikash, additional, Weimerskirch, Henri, additional, Wikelski, Martin, additional, and Shepard., Emily L. C., additional
- Published
- 2022
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20. The role of wingbeat frequency and amplitude in flight power: supplementary information
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Krishnan, Krishnamoorthy, Garde, Baptiste, Bennison, Ashley, Cole, Nik C., Cole, Emma-L., Darby, Jamie, Elliott, Kyle H., Fell, Adam, Gómez-Laich, Agustina, de Grissac, Sophie, Jessopp, Mark, Lempidakis, Emmanouil, Mizutani, Yuichi, Prudor, Aurélien, Quetting, Michael, Quintana, Flavio, Robotka, Hermina, Roulin, Alexandre, Ryan, Peter G., Schalcher, Kim, Schoombie, Stefan, Tatayah, Vikash, Tremblay, Fred, Weimerskirch, Henri, Whelan, Shannon, Wikelski, Martin, Yoda, Ken, Hedenström, Anders, and Shepard, Emily L. C.
- Abstract
This file contains information on ethical approvals for the tagged birds, mixed model results of interaction between wingbeat amplitude, frequency and airspeed for tropic birds and the effect of sampling frequency on the estimation of acceleration signal amplitude for the manuscript "The role of wingbeat frequency and amplitude in flight power" published in the Journal of Royal Society Interface.
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- 2022
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21. Front Cover
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Reisinger, Ryan R., primary, Corney, Stuart, additional, Raymond, Ben, additional, Lombard, Amanda T., additional, Bester, Marthán N., additional, Crawford, Robert J. M., additional, Davies, Delia, additional, Bruyn, P. J. Nico, additional, Dilley, Ben J., additional, Kirkman, Stephen P., additional, Makhado, Azwianewi B., additional, Ryan, Peter G., additional, Schoombie, Stefan, additional, Stevens, Kim L., additional, Tosh, Cheryl A., additional, Wege, Mia, additional, Whitehead, T. Otto, additional, Sumner, Michael D., additional, Wotherspoon, Simon, additional, Friedlaender, Ari S., additional, Cotté, Cedric, additional, Hindell, Mark A., additional, Ropert‐Coudert, Yan, additional, and Pistorius, Pierre A., additional
- Published
- 2021
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22. Habitat model forecasts suggest potential redistribution of marine predators in the southern Indian Ocean
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Reisinger, Ryan R., primary, Corney, Stuart, additional, Raymond, Ben, additional, Lombard, Amanda T., additional, Bester, Marthán N., additional, Crawford, Robert J. M., additional, Davies, Delia, additional, Bruyn, P. J. Nico, additional, Dilley, Ben J., additional, Kirkman, Stephen P., additional, Makhado, Azwianewi B., additional, Ryan, Peter G., additional, Schoombie, Stefan, additional, Stevens, Kim L., additional, Tosh, Cheryl A., additional, Wege, Mia, additional, Whitehead, T. Otto, additional, Sumner, Michael D., additional, Wotherspoon, Simon, additional, Friedlaender, Ari S., additional, Cotté, Cedric, additional, Hindell, Mark A., additional, Ropert‐Coudert, Yan, additional, and Pistorius, Pierre A., additional
- Published
- 2021
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23. Remotely sensing motion: the use of multiple biologging technologies to detect fine-scale, at-sea behaviour of breeding seabirds in a variable Southern Ocean environment
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Schoombie, Stefan, Ryan, Peter G, and Wilson, Rory P
- Subjects
Biological Sciences - Abstract
The at-sea behaviour of seabirds, such as albatrosses and petrels (order Procellariiformes), is difficult to study because they spend most of their time on the ocean and have extremely large ranges. In the early 2000s, behavioural studies of seabirds were dominated by diving patterns of diving birds or spatial studies from satellite telemetry. Recent advances in biologging technologies have opened up new avenues for studying the at-sea behaviour of farranging seabirds in their natural environment. Bio-logging devices are now small enough to be attached to flying seabirds where multiple sensors record data at infrasecond sampling rates. These data can be used to infer, inter alia, body posture, activity (e.g. flapping, takeoff, landing, etc.), magnetic heading and spatial distribution at a resolution that was not previously possible. Bio-logging devices are battery powered and a tradeoff exists between the length of deployments and sampling frequencies, however not a lot of study has been done on what the effect of coarse sampling rates are on data quality. Together with the masses of data that are generated by bio-logging devices, analytical tools have also become available to extract useful metrics from the data. This thesis utilized some of the latest bio-logging technology to study the at-sea behaviour of several procellariiforms, breeding on Marion, Gough and Nightingale Islands, from finescale data. After describing the loggers used and the methods of deployment in Chapter 2, I assess the effect that sampling rates have on metrics derived from GPS loggers in Chapter 3. This was done by sub-sampling GPS tracks recorded at 1-s sampling intervals, showing the effect that different sampling intervals have on metrics, including the total distance travelled and behavioural states derived from path length and turning angles. I show that for larger sampling intervals, the total distance travelled will be underestimated at varying degrees depending on flight sinuosity. By varying sampling rates when estimating behavioural states, I show that moderate (10–30 min) sampling intervals may produce better results. I explore the limitations of low-cost GPS loggers for fine-scale analyses and conclude that specialized loggers are most likely required when sampling at intervals < 1 s. In Chapter 4 I use specialized loggers in the form of tri-axial magnetometer, and video loggers and describe two novel methods to extract roll angles of albatrosses during dynamic soaring flight. Animal body angles are normally extracted by using tri-axial accelerometer data, but their dynamic soaring flight mode inhibits the use of these methods. I show how magnetometer data are independent of dynamic movement and can be used to estimate roll angles of flying seabirds. This method is validated from bird-borne video footage where the horizon is used as a proxy for the bird's roll angle and I describe a method to automatically extract such angles using computer vision techniques. These new methods are then applied to data collected from Wandering Albatrosses Diomedea exulans in Chapter 5, showing how the birds vary their roll angle in response to changing winds. Additionally, flapping flight was identified from patterns in the vertical axis (heave) of a tri-axial accelerometer and I show how Wandering Albatrosses may be flapping more than expected. By coupling flapping and roll angles I show that flapping, on occasion, occur at the upper turn of the dynamic soaring cycle, a period previous thought devoid of flaps. These results also suggest possible sexual differences, where males seem to flap more often than females and limit their take-offs to favourable wind conditions. Lastly, in Chapter 6 I use the same methods as in the previous two chapters to compare the fine-scale flight of six Procellariiformes species breeding on Marion, Gough and Nightingale Islands. I show how these species have varied flight patterns where they respond differently to wind patterns, most likely driving their distribution and eventual foraging areas. As expected, smaller species seem to be more manoeuvrable allowing them to rapidly roll at extreme angles in strong winds while tolerating light winds by increasing the amount of time spent flapping. Breeding location also played a role as birds from the Tristan da Cunha archipelago flapped more often and flew in lighter winds than Marion Island birds. In summary, Chapter 7 discusses how, using a multisensor approach, bio-logging technology can be effectively used to study the fine-scale behaviour of flying seabirds. Each of the loggers have their own limitations and it is important to take these into account when analyzing the data. I describe two new methods for extracting roll angles from dynamic soaring seabirds and show how individuals from several species vary roll angle and flapping flight in response to changing winds. This thesis highlights the varying behavioural strategies that flying seabirds use in the Southern Ocean, showing that individual species and populations may respond differently to changing environmental conditions.
- Published
- 2021
24. Global political responsibility for the conservation of albatrosses and large petrels
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Beal, Martin, Dias, Maria P., Phillips, Richard A., Oppel, Steffen, Hazin, Carolina, Pearmain, Elizabeth J., Adams, Josh, Anderson, David J., Antolos, Michelle, Arata, Javier A., Arcos, José Manuel, Arnould, John P. Y., Awkerman, Jill, Bell, Elizabeth, Bell, Mike, Carey, Mark, Carle, Ryan, Clay, Thomas A., Cleeland, Jaimie, Colodro, Valentina, Conners, Melinda, Cruz-flores, Marta, Cuthbert, Richard, Delord, Karine, Deppe, Lorna, Dilley, Ben J., Dinis, Herculano, Elliott, Graeme, De Felipe, Fernanda, Felis, Jonathan, Forero, Manuela G., Freeman, Amanda, Fukuda, Akira, González-solís, Jacob, Granadeiro, José Pedro, Hedd, April, Hodum, Peter, Igual, José Manuel, Jaeger, Audrey, Landers, Todd J., Le Corre, Mathieu, Makhado, Azwianewi, Metzger, Benjamin, Militão, Teresa, Montevecchi, William A., Morera-pujol, Virginia, Navarro-herrero, Leia, Nel, Deon, Nicholls, David, Oro, Daniel, Ouni, Ridha, Ozaki, Kiyoaki, Quintana, Flavio, Ramos, Raül, Reid, Tim, Reyes-gonzález, José Manuel, Robertson, Christopher, Robertson, Graham, Romdhane, Mohamed Salah, Ryan, Peter G., Sagar, Paul, Sato, Fumio, Schoombie, Stefan, Scofield, R. Paul, Shaffer, Scott A., Shah, Nirmal Jivan, Stevens, Kim L., Surman, Christopher, Suryan, Robert M., Takahashi, Akinori, Tatayah, Vikash, Taylor, Graeme, Thompson, David R., Torres, Leigh, Walker, Kath, Wanless, Ross, Waugh, Susan M., Weimerskirch, Henri, Yamamoto, Takashi, Zajkova, Zuzana, Zango, Laura, Catry, Paulo, Beal, Martin, Dias, Maria P., Phillips, Richard A., Oppel, Steffen, Hazin, Carolina, Pearmain, Elizabeth J., Adams, Josh, Anderson, David J., Antolos, Michelle, Arata, Javier A., Arcos, José Manuel, Arnould, John P. Y., Awkerman, Jill, Bell, Elizabeth, Bell, Mike, Carey, Mark, Carle, Ryan, Clay, Thomas A., Cleeland, Jaimie, Colodro, Valentina, Conners, Melinda, Cruz-flores, Marta, Cuthbert, Richard, Delord, Karine, Deppe, Lorna, Dilley, Ben J., Dinis, Herculano, Elliott, Graeme, De Felipe, Fernanda, Felis, Jonathan, Forero, Manuela G., Freeman, Amanda, Fukuda, Akira, González-solís, Jacob, Granadeiro, José Pedro, Hedd, April, Hodum, Peter, Igual, José Manuel, Jaeger, Audrey, Landers, Todd J., Le Corre, Mathieu, Makhado, Azwianewi, Metzger, Benjamin, Militão, Teresa, Montevecchi, William A., Morera-pujol, Virginia, Navarro-herrero, Leia, Nel, Deon, Nicholls, David, Oro, Daniel, Ouni, Ridha, Ozaki, Kiyoaki, Quintana, Flavio, Ramos, Raül, Reid, Tim, Reyes-gonzález, José Manuel, Robertson, Christopher, Robertson, Graham, Romdhane, Mohamed Salah, Ryan, Peter G., Sagar, Paul, Sato, Fumio, Schoombie, Stefan, Scofield, R. Paul, Shaffer, Scott A., Shah, Nirmal Jivan, Stevens, Kim L., Surman, Christopher, Suryan, Robert M., Takahashi, Akinori, Tatayah, Vikash, Taylor, Graeme, Thompson, David R., Torres, Leigh, Walker, Kath, Wanless, Ross, Waugh, Susan M., Weimerskirch, Henri, Yamamoto, Takashi, Zajkova, Zuzana, Zango, Laura, and Catry, Paulo
- Abstract
Migratory marine species cross political borders and enter the high seas, where the lack of an effective global management framework for biodiversity leaves them vulnerable to threats. Here, we combine 10,108 tracks from 5775 individual birds at 87 sites with data on breeding population sizes to estimate the relative year-round importance of national jurisdictions and high seas areas for 39 species of albatrosses and large petrels. Populations from every country made extensive use of the high seas, indicating the stake each country has in the management of biodiversity in international waters. We quantified the links among national populations of these threatened seabirds and the regional fisheries management organizations (RFMOs) which regulate fishing in the high seas. This work makes explicit the relative responsibilities that each country and RFMO has for the management of shared biodiversity, providing invaluable information for the conservation and management of migratory species in the marine realm.
- Published
- 2021
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25. Global political responsibility for the conservation of albatrosses and large petrels
- Author
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European Commission, National Science Foundation (US), Universidad de Barcelona, Ministerio de Educación y Ciencia (España), Ministerio de Ciencia e Innovación (España), Ministerio de Economía y Competitividad (España), Generalitat de Catalunya, Beal, Martin, Dias, Maria P., Phillips, Richard A., Oppel, Steffen, Hazin, Carolina, Pearmain, Elizabeth J., Adams, Josh, Anderson, David J., Antolos, Michelle, Arata, Javier A., Arcos, José Manuel, Arnould, John P. Y., Awkerman, Jill, Bell, Elizabeth, Bell, Mike, Carey, Mark, Carle, Ryan, Clay, Thomas A., Cleeland, Jaimie, Colodro, Valentina, Conners, Melinda, Cruz-Flores, Marta, Cuthbert, Richard, Delord, Karine, Deppe, Lorna, Dilley, Ben J., Dinis, Herculano, Elliott, Graeme, De Felipe, Fernanda, Felis, Jonathan, Forero, Manuela G., Freeman, Amanda, Fukuda, Akira, González-Solís, Jacob, Granadeiro, José Pedro, Hedd, April, Hodum, Peter, Igual, José Manuel, Jaeger, Audrey, Landers, Todd J., Le Corre, Matthieu, Makhado, Azwianewi, Metzger, Benjamin, Militão, Teresa, Montevecchi, William A., Morera-Pujol, Virginia, Navarro-Herrero, Leia, Nel, Deon, Nicholls, David, Oro, Daniel, Ouni, Ridha, Ozaki, Kiyoaki, Quintana, Flavio, Ramos, Raül, Reid, Tim, Reyes-González, José M., Robertson, Christopher, Robertson, Graham, Romdhane, Mohamed Salah, Ryan, Peter G., Sagar, Paul, Sato, Fumio, Schoombie, Stefan, Scofield, R. Paul, Shaffer, Scott A., Shah, Nirmal Jivan, Stevens, Kim L., Surman, Christopher, Suryan, Robert M., Takahashi, Akinori, Tatayah, Vikash, Taylor, Graeme, Thompson, David R., Torres, Leigh, Walker, Kath, Wanless, Ross M., Waugh, Susan M., Weimerskirch, Henri, Yamamoto, Takashi, Zajková, Zuzana, Zango, Laura, Catry, Paulo, European Commission, National Science Foundation (US), Universidad de Barcelona, Ministerio de Educación y Ciencia (España), Ministerio de Ciencia e Innovación (España), Ministerio de Economía y Competitividad (España), Generalitat de Catalunya, Beal, Martin, Dias, Maria P., Phillips, Richard A., Oppel, Steffen, Hazin, Carolina, Pearmain, Elizabeth J., Adams, Josh, Anderson, David J., Antolos, Michelle, Arata, Javier A., Arcos, José Manuel, Arnould, John P. Y., Awkerman, Jill, Bell, Elizabeth, Bell, Mike, Carey, Mark, Carle, Ryan, Clay, Thomas A., Cleeland, Jaimie, Colodro, Valentina, Conners, Melinda, Cruz-Flores, Marta, Cuthbert, Richard, Delord, Karine, Deppe, Lorna, Dilley, Ben J., Dinis, Herculano, Elliott, Graeme, De Felipe, Fernanda, Felis, Jonathan, Forero, Manuela G., Freeman, Amanda, Fukuda, Akira, González-Solís, Jacob, Granadeiro, José Pedro, Hedd, April, Hodum, Peter, Igual, José Manuel, Jaeger, Audrey, Landers, Todd J., Le Corre, Matthieu, Makhado, Azwianewi, Metzger, Benjamin, Militão, Teresa, Montevecchi, William A., Morera-Pujol, Virginia, Navarro-Herrero, Leia, Nel, Deon, Nicholls, David, Oro, Daniel, Ouni, Ridha, Ozaki, Kiyoaki, Quintana, Flavio, Ramos, Raül, Reid, Tim, Reyes-González, José M., Robertson, Christopher, Robertson, Graham, Romdhane, Mohamed Salah, Ryan, Peter G., Sagar, Paul, Sato, Fumio, Schoombie, Stefan, Scofield, R. Paul, Shaffer, Scott A., Shah, Nirmal Jivan, Stevens, Kim L., Surman, Christopher, Suryan, Robert M., Takahashi, Akinori, Tatayah, Vikash, Taylor, Graeme, Thompson, David R., Torres, Leigh, Walker, Kath, Wanless, Ross M., Waugh, Susan M., Weimerskirch, Henri, Yamamoto, Takashi, Zajková, Zuzana, Zango, Laura, and Catry, Paulo
- Abstract
Migratory marine species cross political borders and enter the high seas, where the lack of an effective global management framework for biodiversity leaves them vulnerable to threats. Here, we combine 10,108 tracks from 5775 individual birds at 87 sites with data on breeding population sizes to estimate the relative year-round importance of national jurisdictions and high seas areas for 39 species of albatrosses and large petrels. Populations from every country made extensive use of the high seas, indicating the stake each country has in the management of biodiversity in international waters. We quantified the links among national populations of these threatened seabirds and the regional fisheries management organizations (RFMOs) which regulate fishing in the high seas. This work makes explicit the relative responsibilities that each country and RFMO has for the management of shared biodiversity, providing invaluable information for the conservation and management of migratory species in the marine realm.
- Published
- 2021
26. Global political responsibility for the conservation of albatrosses and large petrels
- Author
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Beal, Martin, primary, Dias, Maria P., additional, Phillips, Richard A., additional, Oppel, Steffen, additional, Hazin, Carolina, additional, Pearmain, Elizabeth J., additional, Adams, Josh, additional, Anderson, David J., additional, Antolos, Michelle, additional, Arata, Javier A., additional, Arcos, José Manuel, additional, Arnould, John P. Y., additional, Awkerman, Jill, additional, Bell, Elizabeth, additional, Bell, Mike, additional, Carey, Mark, additional, Carle, Ryan, additional, Clay, Thomas A., additional, Cleeland, Jaimie, additional, Colodro, Valentina, additional, Conners, Melinda, additional, Cruz-Flores, Marta, additional, Cuthbert, Richard, additional, Delord, Karine, additional, Deppe, Lorna, additional, Dilley, Ben J., additional, Dinis, Herculano, additional, Elliott, Graeme, additional, De Felipe, Fernanda, additional, Felis, Jonathan, additional, Forero, Manuela G., additional, Freeman, Amanda, additional, Fukuda, Akira, additional, González-Solís, Jacob, additional, Granadeiro, José Pedro, additional, Hedd, April, additional, Hodum, Peter, additional, Igual, José Manuel, additional, Jaeger, Audrey, additional, Landers, Todd J., additional, Le Corre, Matthieu, additional, Makhado, Azwianewi, additional, Metzger, Benjamin, additional, Militão, Teresa, additional, Montevecchi, William A., additional, Morera-Pujol, Virginia, additional, Navarro-Herrero, Leia, additional, Nel, Deon, additional, Nicholls, David, additional, Oro, Daniel, additional, Ouni, Ridha, additional, Ozaki, Kiyoaki, additional, Quintana, Flavio, additional, Ramos, Raül, additional, Reid, Tim, additional, Reyes-González, José Manuel, additional, Robertson, Christopher, additional, Robertson, Graham, additional, Romdhane, Mohamed Salah, additional, Ryan, Peter G., additional, Sagar, Paul, additional, Sato, Fumio, additional, Schoombie, Stefan, additional, Scofield, R. Paul, additional, Shaffer, Scott A., additional, Shah, Nirmal Jivan, additional, Stevens, Kim L., additional, Surman, Christopher, additional, Suryan, Robert M., additional, Takahashi, Akinori, additional, Tatayah, Vikash, additional, Taylor, Graeme, additional, Thompson, David R., additional, Torres, Leigh, additional, Walker, Kath, additional, Wanless, Ross, additional, Waugh, Susan M., additional, Weimerskirch, Henri, additional, Yamamoto, Takashi, additional, Zajkova, Zuzana, additional, Zango, Laura, additional, and Catry, Paulo, additional
- Published
- 2021
- Full Text
- View/download PDF
27. A survey of Great-winged Petrels Pterodroma macroptera breeding at sub-Antarctic Marion Island and a revised global population estimate
- Author
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Dilley, Ben J, primary, Hedding, David W, additional, Schoombie, Stefan, additional, and Ryan, Peter G, additional
- Published
- 2020
- Full Text
- View/download PDF
28. Clustered or dispersed: testing the effect of sampling strategy to census burrow-nesting petrels with varied distributions at sub-Antarctic Marion Island
- Author
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Dilley, Ben J., primary, Hedding, David W., additional, Henry, Dominic A.W., additional, Rexer-Huber, Kalinka, additional, Parker, Graham C., additional, Schoombie, Stefan, additional, Osborne, Alexis, additional, and Ryan, Peter G., additional
- Published
- 2019
- Full Text
- View/download PDF
29. Burrow Wars and Sinister Behaviour among Burrow-Nesting Petrels at Sub-Antarctic Marion Island
- Author
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Dilley, Ben J., primary, Davies, Delia, additional, Stevens, Kim, additional, Schoombie, Stefan, additional, Schoombie, Janine, additional, and Ryan, Peter G., additional
- Published
- 2019
- Full Text
- View/download PDF
30. Mouse predation affects breeding success of burrow-nesting petrels at sub-Antarctic Marion Island
- Author
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Dilley, Ben J., primary, Schoombie, Stefan, additional, Stevens, Kim, additional, Davies, Delia, additional, Perold, Vonica, additional, Osborne, Alexis, additional, Schoombie, Janine, additional, Brink, Christiaan W., additional, Carpenter-Kling, Tegan, additional, and Ryan, Peter G., additional
- Published
- 2017
- Full Text
- View/download PDF
31. The distribution of breeding Sooty Albatrosses from the three most important breeding sites: Gough, Tristan and the Prince Edward Islands
- Author
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Schoombie, Stefan, primary, Dilley, Ben J., additional, Davies, Delia, additional, Glass, Trevor, additional, and Ryan, Peter G., additional
- Published
- 2017
- Full Text
- View/download PDF
32. Pseudo-egg “fabrication” by Grey-headed Albatrosses Thalassarche chrysostoma on Marion Island
- Author
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Schoombie, Stefan, primary and Schoombie, Janine, additional
- Published
- 2017
- Full Text
- View/download PDF
33. The population status, breeding success and foraging ecology of Phoebetria albatrosses on Marion Island
- Author
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Schoombie, Stefan and Ryan, Peter G
- Subjects
Conservation Biology - Abstract
Seabird populations breeding within the Southern Ocean have experienced various threats over the past few decades. Albatrosses are particularly at risk due to several factors, inter alia, accidental bycatch on fishing gear, ingestion of polluted marine debris, invasive predatory species at breeding sites, as well as climate change-induced alterations to ocean circulation patterns. The recent decline in many albatross populations is mainly attributed to incidental fishing mortality, which decreases adult as well as juvenile survival rates and is thus detrimental to these long-lived, low fecundity birds. Recently, changes in fishing regulations to require the use of various mitigation measures have reduced the number of seabirds killed by fishing vessels. However fisheries may still impact seabirds either by direct competition for the same prey, or through ecosystem cascades arising from the removal of predatory fish and squid. Sub-Antarctic islands are important breeding grounds for many seabirds, including albatrosses. Monitoring of seabirds breeding on sub-Antarctic islands is important to detect changes in population dynamics to be able to implement timely conservation measures. Marion Island, the larger of the two Prince Edward Islands, some 2000 km southeast of South Africa, is a breeding site for four albatross species including the sooty (Phoebetria fusca) and light-mantled albatrosses (P. palpebrata). The Prince Edward and Crozet Islands are the only places where both Phoebetria albatrosses breed sympatrically in substantial numbers. Both archipelagos are 46°-47°S, at the southern and northern limit for sooty and light-mantled albatrosses, respectively. At-sea observations and diet studies suggest that sooty albatrosses forage mainly in sub-tropical waters to the north and light-mantled albatross in Antarctic or sub-Antarctic waters to the south. The sooty albatross is listed as Endangered due to recent global population declines whereas the light-mantled albatross is Near-threatened. The only comprehensive study of these species at the Prince Edward Islands was conducted during the late 1970s but annual estimates of breeding populations have been made from 1996 onwards. The previous analysis of these counts, up to 2008, suggested that the sooty albatross population on Marion Island decreased from 1996 to 2008, whereas numbers of light-mantled albatrosses increased over this period. Extending the count series to 2014, trends for both species were reversed, with sooty albatrosses recently increasing and light-mantled albatrosses decreasing. However, the timing of sooty albatross counts is in question as these were done towards the end of the incubation period when many nest failures have already occurred. Breeding success of both Phoebetria albatrosses was estimated during 2013/14 and 2014/15. The success of sooty albatrosses (51% overall) was higher than estimated at Marion Island in the 1970s (19%), but it was still lower than that of a neighbouring colony on Possession Island, Crozet archipelago (65%). The sooty albatross success was however skewed by a sub-colony with a very low 5 breeding success; excluding this sub-colony the breeding success is similar to that of the Crozets. Light-mantled albatross breeding success was the same as past estimates and lower than colonies at Macquarie and Possession Islands. Additional monitoring of a sub-sample of nests within the monitoring colonies was done to determine incubation and brood guard (light-mantled albatross only) shift lengths for both species. The shift lengths and distributions were not significantly different from previous data on Marion Island or other breeding sites.
- Published
- 2015
34. Mouse predation affects breeding success of burrow-nesting petrels at sub-Antarctic Marion Island.
- Author
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Dilley, Ben J., Schoombie, Stefan, Stevens, Kim, Davies, Delia, Perold, Vonica, Osborne, Alexis, Schoombie, Janine, Brink, Christiaan W., Carpenter-Kling, Tegan, and Ryan, Peter G.
- Subjects
MICE breeding ,PTERODROMA ,PREDATION - Abstract
We report the breeding success of four species of burrow-nesting petrels at sub-Antarctic Marion Island where house mice Mus musculus are the sole introduced mammal. Feral cats Felis catus were present on Marion for four decades from 1949, killing millions of seabirds and greatly reducing petrel populations. Cats were eradicated by 1991, but petrel populations have shown only marginal recoveries. We hypothesize that mice are suppressing their recovery through depredation of petrel eggs and chicks. Breeding success for winter breeders (grey petrels Procellaria cinerea (34±21%) and great-winged petrels Pterodroma macroptera (52±7%)) were lower than for summer breeders (blue petrels Halobaena caerulea (61±6%) and white-chinned petrels Procellaria aequinoctialis (59±6%)) and among winter breeders most chick fatalities were of small chicks up to 14 days old. We assessed the extent of mouse predation by monitoring the inside of 55 burrow chambers with video surveillance cameras (4024 film days from 2012–16) and recorded fatal attacks on grey (3/18 nests filmed, 17%) and great-winged petrel chicks (1/19, 5%). Our results show that burrow-nesting petrels are at risk from mouse predation, providing further motivation for the eradication of mice from Marion Island. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
35. ‘Scalping’ of albatross fledglings by introduced mice spreads rapidly at Marion Island
- Author
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Dilley, Ben J., primary, Schoombie, Stefan, additional, Schoombie, Janine, additional, and Ryan, Peter G., additional
- Published
- 2015
- Full Text
- View/download PDF
36. ‘Scalping’ of albatross fledglings by introduced mice spreads rapidly at Marion Island.
- Author
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Dilley, Ben J., Schoombie, Stefan, Schoombie, Janine, and Ryan, Peter G.
- Subjects
DIOMEDEA ,MICE ,MAMMAL behavior ,PREDATORY animal behavior ,ANIMAL mortality ,BIRD extinctions - Abstract
House mice (Mus musculus L.) were introduced to sub-Antarctic Marion Island more than two centuries ago, and have been the only introduced mammal on the island since 1991 when feral cats were eradicated. The first mouse-injured wandering albatross (Diomedea exulans L.) chick was found in 2003 and since then attacks have continued at a low level affecting <1% of the population. In 2009, the first ‘scalpings’ were detected; sooty albatross (Phoebetria fusca Hilsenberg) fledglings were found with raw wounds on the nape. In 2015, mice attacked large chicks of all three albatross species that fledge in autumn: grey-headed (Thalassarche chrysostoma Forster) (at least 102 wounded chicks; 4.6% of fledglings), sooty (n=45, 4.3%) and light-mantled albatross (P. palpebrata Forster) (n=1, 4%). Filming at night confirmed that mice were responsible for wounds. Attacks started independently in small pockets all around the island’s 70 km coastline, separated by distances hundreds of times greater than mouse home ranges. The widespread nature of mouse attacks in 2015 on large, well-feathered chicks is alarming and highlights not only Marion Island as a priority island for mouse eradication but also that mice alone may significantly affect threatened seabird species. [ABSTRACT FROM PUBLISHER]
- Published
- 2016
- Full Text
- View/download PDF
37. Front Cover.
- Author
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Reisinger, Ryan R., Corney, Stuart, Raymond, Ben, Lombard, Amanda T., Bester, Marthán N., Crawford, Robert J. M., Davies, Delia, de Bruyn, P. J. Nico, Dilley, Ben J., Kirkman, Stephen P., Makhado, Azwianewi B., Ryan, Peter G., Schoombie, Stefan, Stevens, Kim L., Tosh, Cheryl A., Wege, Mia, Whitehead, T. Otto, Sumner, Michael D., Wotherspoon, Simon, and Friedlaender, Ari S.
- Subjects
OCEAN - Abstract
An adult male southern elephant seal (Mirounga leonina) at Marion Island, southern Indian Ocean. Image credit: Ryan Reisinger. The cover image relates to the Research Article https://doi.org/10.1111/ddi.13447 "Habitat model forecasts suggest potential redistribution of marine predators in the southern Indian Ocean" by Reisinger et al. [Extracted from the article]
- Published
- 2022
- Full Text
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38. Effects of age, sex, colony and breeding phase on marine space use by Great Shearwaters <italic>Ardenna gravis</italic> in the South Atlantic.
- Author
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Ronconi, Robert A., Schoombie, Stefan, Westgate, Andrew J., Wong, Sarah N. P., Koopman, Heather N., and Ryan, Peter G.
- Subjects
SEA birds ,BIRD breeding ,BIRD ecology ,COLONIAL birds ,SHEARWATERS - Abstract
Shearwaters are among the most abundant seabirds globally and breeding birds often travel thousands of kilometres during foraging trips to productive marine areas. Great Shearwaters
Ardenna gravis are endemic breeders of the Tristan da Cunha Archipelago with a population of 5-6 million breeding pairs making them key top predators within the South Atlantic Ocean. We deployed satellite transmitters on 42 breeding and non-breeding shearwaters at two nesting islands and one foraging site in the northern hemisphere to quantify their movements and space use with respect to age, sex, colonies and breeding phases. During the pre-laying period, birds from Gough Island made trips of 2400 km to the Benguela upwelling region off South Africa, or > 4000 km to the Patagonian Shelf; patterns which overlapped with immature birds from the Bay of Fundy, Canada. During the incubation period, males and females from Inaccessible Island showed differences in trip durations, but no difference in foraging ranges: both sexes made trips of 1500-2000 km to the Sub-Antarctic Front or 4000 km to the Patagonian Shelf, among the furthest foraging trips of breeding seabirds observed to date. Although the colonies are separated by only 400 km, during the incubation period, the at-sea distribution of non-breeding birds from Gough Island was spatially segregated from breeding and failed birds from Inaccessible Island, whereas immature birds from Fundy overlapped with birds from both colonies. During the post-breeding period, all tagged populations overlapped on the Patagonian Shelf. Argentina’s Exclusive Economic Zone was used extensively during pre-laying, incubation, and post-breeding periods, highlighting the global importance of the Patagonian Shelf for this species. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
- View/download PDF
39. Identifying prey capture events of a free-ranging marine predator using bio-logger data and deep learning.
- Author
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Schoombie S, Jeantet L, Chimienti M, Sutton GJ, Pistorius PA, Dufourq E, Lowther AD, and Oosthuizen WC
- Abstract
Marine predators are integral to the functioning of marine ecosystems, and their consumption requirements should be integrated into ecosystem-based management policies. However, estimating prey consumption in diving marine predators requires innovative methods as predator-prey interactions are rarely observable. We developed a novel method, validated by animal-borne video, that uses tri-axial acceleration and depth data to quantify prey capture rates in chinstrap penguins ( Pygoscelis antarctica ). These penguins are important consumers of Antarctic krill ( Euphausia superba ), a commercially harvested crustacean central to the Southern Ocean food web. We collected a large data set ( n = 41 individuals) comprising overlapping video, accelerometer and depth data from foraging penguins. Prey captures were manually identified in videos, and those observations were used in supervised training of two deep learning neural networks (convolutional neural network (CNN) and V-Net). Although the CNN and V-Net architectures and input data pipelines differed, both trained models were able to predict prey captures from new acceleration and depth data (linear regression slope of predictions against video-observed prey captures = 1.13; R
2 ≈ 0.86). Our results illustrate that deep learning algorithms offer a means to process the large quantities of data generated by contemporary bio-logging sensors to robustly estimate prey capture events in diving marine predators., Competing Interests: We declare we have no competing interests., (© 2024 The Authors.)- Published
- 2024
- Full Text
- View/download PDF
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