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    دورية أكاديمية

    المصدر: Arctic Science, Vol 10, Iss 1, Pp 233-239 (2024)

    الوصف: As sea-ice cover is shrinking, polar bears (Ursus maritimus, Phipps, 1774) face decreased access to seals, their primary prey, resulting in a greater dependence on terrestrial food sources. Whether polar bears can benefit from these terrestrial food sources, however, depends on their ability to find and capture prey items without expending more energy than is acquired. Here, we report one of the northernmost observations of polar bear predation on adult birds. The bear used a dive-hunting technique, which consisted of submerging itself, approaching underwater, and catching flightless greater snow geese (Anser caerulescens caerulescens (Linnaeus, 1758)) from beneath the surface of a tundra pond. After evaluating energy expenditures during swimming and energy intakes from consuming geese, we estimated that this rarely documented dive-hunting technique could be energetically profitable for a certain range of pursuit durations. This observation highlights the behavioral plasticity that polar bears can deploy to punctually exploit land-based food sources.

    وصف الملف: electronic resource

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    دورية أكاديمية

    المصدر: Arctic Science (2023)

    الوصف: As sea-ice cover is shrinking, polar bears (Ursus maritimus, Phipps 1774) face decreased access to seals, their primary prey, resulting in a greater dependance on terrestrial food sources. Whether polar bears can benefit from these terrestrial food sources however depends on their ability to find and capture prey items without expending more energy than is acquired. Here, we report one of the northernmost observations of polar bear predation on adult birds. The bear used a dive-hunting technique, which consisted of submerging itself, approaching underwater and catching flightless greater snow geese (Anser caerulescens caerulescens) from beneath the surface of a tundra pond. After evaluating energy expenditures during swimming and energy intakes from consuming geese, we estimated that this rarely documented dive-hunting technique could be energetically profitable for a certain range of pursuit duration. This observation highlights the behavioral plasticity that polar bears can deploy to punctually exploit land-based food sources.

    وصف الملف: electronic resource

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    المساهمون: Département de Biologie & Centre d’Etudes Nordiques [Canada] (Université Laval), Université Laval, Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC), Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)

    المصدر: Biological Conservation
    Biological Conservation, Elsevier, 2021, 255, pp.108968. ⟨10.1016/j.biocon.2021.108968⟩

    الوصف: International audience; Overabundant species can have major impacts on their habitat and induce trophic cascades within ecosystems. In North America, the overabundant greater snow goose (Anser caerulescens atlanticus) has been successfully controlled through special spring hunting regulations since 1999. Hunting is a source of mortality but also of disturbance, which affects the behavior and nutrient storage dynamics of staging snow geese. In 2020, the lockdown imposed by the COVID19 pandemic reduced hunting activity during their migratory stopover in Québec by at least 31%. This provided a unique opportunity to assess the effects of a sudden reduction in hunting disturbance on geese. We used long-term data on body mass combined with movement data from GPS-tracked birds in 2019 and 2020 to assess the effects of the 2020 lockdown on the spring body condition and behavior of greater snow geese. Body condition was higher in 2020 than in all years since the inception of spring hunting in 1999, except for 2019. However, in 2020 geese reached maximal body condition earlier during the staging period than in any other year and reduced by half time spent feeding in highly profitable but risky agricultural habitat in late spring compared to 2019. Although our study was not designed to evaluate the effects of the lockdown, the associated reduction in disturbance in 2020 supports the hypothesis that hunting-related disturbance negatively affects foraging efficiency and body condition in geese. Since spring body condition is related to subsequent breeding success, the lockdown could increase productivity in this overabundant population.

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    المؤلفون: Francesca Cagnacci, Anastasios Bounas, Víctor Vázquez, Volen Arkumarev, Margarita Roa, Christopher J. Henderson, Neil Hammerschlag, Marc J. S. Hensel, Ian MacGregor-Fors, Catherine Hobaiter, Elijah Panipakoochoo, Gonzalo Mucientes, Million Tesfaye, Camilo E. Sánchez-Sarria, Dallas D'Silva, Grant Garner, Cloé Pourchier, Erin E. Posthumus, Zuania Colón-Piñeiro, Theresa M. Crimmins, Charlie Huveneers, Victor China, William D. Halliday, Avi Bar-Massada, Breyl X. K. Ng, Jennifer D. Reilly, Brendan J. Godley, Thibaud Gruber, Natalia Ocampo-Peñuela, Mitchell J. Rider, Lori Anne Barnett, Vladimir Dobrev, Nicholas D. Higgs, Christopher J. Patrick, Angélica Hernández-Palma, Kenneth B.H. Er, Rebecca A. Hutchinson, Harel Baz, Pia Anderwald, Marc Shellard, Camilo M. Botero, Sang Don Lee, Megan E. Hanna, Christopher D. Stallings, Yehezkel Buba, Pamela Carzon, Aroha Miller, David R. Barclay, Steffen Oppel, Juan Sebastian Ulloa, Víctor M. Eguíluz, Justin R. Perrault, Thomas A. Schlacher, Lisandro Benedetti-Cecchi, Victoria Saravia-Mullin, Nuno Queiroz, Fabio Bulleri, Zehava Sigal, Robert J. Orth, Jonas Hentati-Sundberg, Tomas J. Bird, Ron Chen, Jarod Lyon, Mengistu Wondafrash, Laurent Chauvaud, Gabriel Barros Gonçalves de Souza, Sarah J. L. Severino, Clive R. McMahon, Christian Requena-Mesa, Eulogio H. Soto, Amir Ayali, Jesse S. Lewis, Mark J. Costello, Miguel A. Furtado, Jessica P. Diaz-Orozco, Eleanor A. Weideman, Kyle Maclean, Frédéric LeTourneux, Lorenzo Sileci, Clementine Seguine, Sarah Abarro, Mackenzie B. Woods, David March, Qiang Yang, Katja Baerenfaller, Catherine M. Foley, Sharon Davidzon, David W. Sims, Ku'ulei S. Rodgers, Cheryl A. Frederick, Andrew G. Jeffs, Ohad Hatzofe, Yigael Ben Ari, Shmulik Yedvab, Cyril Piou, Gregory D. LeClair, Juan C. Franco Morales, Matthew G. Henderson, Cristian A. Cruz-Rodríguez, Ron Efrat, Tabi Karkom, Thomas A. Okey, Tudor Racoviceanu, Enrico Lunghi, Alazar Ruffo, Mohlamatsane M. Mokhatla, Ofer Yaakov, Stephanie M. Martin, Dobromir Dobrev, Matthew K. Pine, Dinusha R.M. Jayathilake, Antonia T. Cooper, Andrea Corradini, Eva Cacabelos, Yunior R. Velázquez, Amber Dearden, Iacopo Bertocci, Tal Gavriel, Sarah E. Hirsch, Elzbieta Kret, Meaghan E. Faletti, Matthew W. H. Chatfield, Lucy C. Woodall, Mary E. Clinton, Gal Badihi, Ilia Baskin, Carina Terry, Christopher G. Lowe, Joseph S. Curtis, Brandy S. Biggar, Nicole Esteban, Ellen G. Denny, Margot L. Hessing-Lewis, David Elustondo, Jeffrey Haight, Donna Gibbs, Robert L. Thomson, Maxim Larrivée, Matthew D. Adams, Camrin D. Braun, Mark G. Meekan, Brendan Connors, Avi Berkovitch, Jessica Schultz, Sigal Balshine, Lauren McWhinnie, Hanspeter Loetscher, Vicent Calatayud, Simon R. Thorrold, Christian Rutz, Nataliya A. Milchakova, Martin K.S. Smith, Stephanie K. Archer, Richard K. Dewey, Raoul Manenti, Kristina Boerder, Alon Penn, Ogen Licht, Susana Rodríguez-Buriticá, Zhu Liu, Rotem Sade, Michael B. Schrimpf, Nicola Koper, Rick D. Stuart-Smith, Austin J. Gallagher, Clayton T. Lamb, Reilly Rodriguez, Luca Pedrotti, Arjun Amar, Amanda E. Bates, Solomon Mengistu, Thierry Grandmont, Guojun He, Oliver N. Shipley, Sara N. Schaffer, Jorge P. Rodríguez, Cecilia Martin, Robin Hale, Simon A. Morley, Eyal Miller, Catherine Alexandra Gagnon, Sarah E. Dudas, Hyomin Park, Sally Hofmeyr, Paulson G. Des Brisay, Matthias-Claudio Loretto, Assaf Zvuloni, Elena Maggi, Jasmine A. Ballantyne, Susan J. Cunningham, Malcolm C.K. Soh, Elizabeth M. P. Madin, Sonja Wipf, David S. Hik, Stoyan C. Nikolov, Cameron J. Baker, Ben L. Gilby, Felipe A. Estela, Chiara Ravaglioli, Christophe Guinet, Alyssa Rosemartin, Lauren Dares, Gilles Gauthier, Michelle García-Arroyo, Luca Rindi, Oded Berger-Tal, Brendan D. Shea, Lucy Zipf, Michael S. Diamond, Shengjie Lai, Giann K. Aguirre-Samboní, Jennifer M. Jackson, Peter G. Ryan, Emily J. Southall, Kyle D. Kittelberger, Fabio C. De Leo, Jonathan Belmaker, Olof Olsson, Steven J. Cooke, Yuhang Pan, Rylan J. Command, Vincent Z. Kuuire, Kevin Wong, Reut Vardi, Xiangliang Zhang, Cristian Mihai Adamescu, Craig A. Radford, Enrique Arbeláez-Cortés, Andrew Graham, Joël Bêty, Charles Palmer, Yuval Zukerman, Miyako H. Warrington, Michael J. Schram, Amit Dolev, Orlando Acevedo-Charry, Claudio A. Quesada-Rodriguez, Kara R. Wall, Nikita Sergeenko, Celene B. Milanes, Jaein Choi, Paula Moraga, Jeff Switzer, Yenifer Herrera-Varón, Jonathan D. Midwood, Manor Gury, Amanda Weltman, Emiliano Mori, Thomas M. Clarke, Mai Lazarus, Jeffrey R. Parmelee, Petra Sumasgutner, Patrick T. Rex, Ziv Birman, Rodrigo Solis, Jennifer Chapman, Alejandro Bernal-Ibáñez, Vinay Udyawer, Itai Namir, David Ocampo, Justin A. Del Bel Belluz, Egide Kalisa, Reny P. Devassy, Pierre Legagneux, Jorge Ramírez-González, Jessleena Suri, Shelby R. Hoover, Michelle E. Taylor, Carlos M. Duarte, Ana F. L. Sobral, Graham J. Edgar, Francesc Peters, Philina A. English, Francis Juanes, Lisa C. Lacko, Marta Coll, Gentile Francesco Ficetola, Nicolas Moity, Emily Weigel, Nathan R. Geraldi, Jill L. Brooks, Philippe Archambault, Nicholas A. W. Brown, Julia Wakeling, Tanya Otero, Matt Rothendler, Shira Salingré, Laura Borden, Richard B. Primack, Veronica Nanni, Miqkayla Stofberg, Guy Lavian, Jacob W. Brownscombe, Samuel Bakari, Jonathan A. Peake, Andrew D. Olds, Paris V. Stefanoudis, Patricia S. Albano, Alexandre Alonso-Fernández, Seth G. Cherry, Juan Fernández-Gracia, Çağan H. Şekercioğlu, Shahar Malamud, Eric Clua, Jeannette Bedard, Dugald Thomson, Josip Kusak, Uri Roll, Louise Wilson, Craig E. Franklin, Roanna Y. T. Pang, Jose Manuel Ochoa-Quintero, Lina María Sánchez-Clavijo, Julien Bonnel, Sorin Cheval, Christine M. Boston, Mark A. Hindell, R. L. Marsh, Ruthy Yahel, Samuel Wiesmann, Frédéric Dulude de-Broin, Adrian H.B. Loo, Ross G. Dwyer, Takahiro Shimada, M. Ortega, Laura P. Kroesen, Ignacio Gestoso, Bibiana Gómez-Valencia, Valeria Vergara, Takanao Tanaka, Fiona Francis, Benjamin P. Y.-H. Lee, Delphine Mathias, Steven Mihaly, Kathleen L. Prudic, Alessia Scuderi, Dana Haggarty, Kent P. McFarland, Katharine L. Gerst, Paul B. Day, Vikram Aditya, Graeme C. Hays, Cerren Richards, Jeffrey A. Seminoff, Robert Harcourt, Matthew P. Stefanak

    المساهمون: European Commission, Agencia Estatal de Investigación (España), Ministerio de Economía y Competitividad (España), Ministerio de Ciencia e Innovación (España), Department of Ocean Sciences [Newfoudland, Canada] (Memorial University of Newfoundland), Memorial University of Newfoundland (Memorial University of Newfoundland)-Department of Biology, Memorial University of Newfoundland, Gordon and Betty Moore Foundation, National Geographic Society, University of St Andrews. School of Biology, University of St Andrews. Centre for Biological Diversity, University of St Andrews. Centre for Social Learning & Cognitive Evolution, Group, PAN-Environment Working

    المصدر: Digital.CSIC: Repositorio Institucional del CSIC
    Consejo Superior de Investigaciones Científicas (CSIC)
    Biological Conservation
    Biological Conservation (0006-3207) (Elsevier Sci Ltd), 2021-11, Vol. 263, P. 109175 (18p.)
    REDICUC-Repositorio CUC
    Corporación Universidad de la Costa
    instacron:Corporación Universidad de la Costa
    Digital.CSIC. Repositorio Institucional del CSIC
    instname
    Biological Conservation, Elsevier, 2021, 263, pp.109175. ⟨10.1016/j.biocon.2021.109175⟩
    Biological conservation (2021). doi:10.1016/j.biocon.2021.109175
    info:cnr-pdr/source/autori:Bates AE, Primack RB, PAN-Environment Working Group, Mori E, Duarte CM/titolo:Global COVID-19 lockdown highlights humans as both threats and custodians of the environment/doi:10.1016%2Fj.biocon.2021.109175/rivista:Biological conservation/anno:2021/pagina_da:/pagina_a:/intervallo_pagine:/volume

    الوصف: 18 pages, 5 figures, supplementary data https://doi.org/10.1016/j.biocon.2021.109175Test.-- The data supporting the findings of this study are available in the Supplementary Materials (Appendix 3–5, Table A3-A5). Raw datasets (where available) and results summary tables for each analysis of human mobility and empirical datasets are deposited in a github repository: https://github.com/rjcommand/PAN-EnvironmentTest
    The global lockdown to mitigate COVID-19 pandemic health risks has altered human interactions with nature. Here, we report immediate impacts of changes in human activities on wildlife and environmental threats during the early lockdown months of 2020, based on 877 qualitative reports and 332 quantitative assessments from 89 different studies. Hundreds of reports of unusual species observations from around the world suggest that animals quickly responded to the reductions in human presence. However, negative effects of lockdown on conservation also emerged, as confinement resulted in some park officials being unable to perform conservation, restoration and enforcement tasks, resulting in local increases in illegal activities such as hunting. Overall, there is a complex mixture of positive and negative effects of the pandemic lockdown on nature, all of which have the potential to lead to cascading responses which in turn impact wildlife and nature conservation. While the net effect of the lockdown will need to be assessed over years as data becomes available and persistent effects emerge, immediate responses were detected across the world. Thus initial qualitative and quantitative data arising from this serendipitous global quasi-experimental perturbation highlights the dual role that humans play in threatening and protecting species and ecosystems. Pathways to favorably tilt this delicate balance include reducing impacts and increasing conservation effectiveness
    The Canada Research Chairs program provided funding for the core writing team. Field research funding was provided by A.G. Leventis Foundation; Agence Nationale de la Recherche, [grant number ANR-18-32–0010CE-01 (JCJC PEPPER)]; Agencia Estatal de Investigaci; Agência Regional para o Desenvolvimento da Investigação Tecnologia e Inovação (ARDITI), [grant number M1420-09-5369-FSE-000002]; Alan Peterson; ArcticNet; Arkadaşlar; Army Corp of Engineers; Artificial Reef Program; Australia's Integrated Marine Observing System (IMOS), National Collaborative; Research Infrastructure Strategy (NCRIS), University of Tasmania; Australian Institute of Marine Science; Australian Research Council, [grant number LP140100222]; Bai Xian Asia Institute; Batubay Özkan; BC Hydro Fish and Wildlife Compensation Program; Ben-Gurion University of the Negev; Bertarelli Foundation; Bertarelli Programme in Marine Science; Bilge Bahar; Bill and Melinda Gates Foundation; Biology Society of South Australia; Boston University; Burak Över; California State Assembly member Patrick O'Donnell; California State University Council on Ocean Affairs, Science & Technology; California State University Long Beach; Canada Foundation for Innovation (Major Science Initiative Fund and funding to Oceans Network Canada), [grant number MSI 30199 for ONC]; Cape Eleuthera Foundation; Centre National d'Etudes Spatiales; Centre National de la Recherche Scientifique; Charles Darwin Foundation, [grant number 2398]; Colombian Institute for the Development of Science and Technology (COLCIENCIAS), [grant number 811–2018]; Colombian Ministry of Environment and Sustainable Development, [grant number 0041–2020]; Columbia Basin Trust; Commission for Environmental Cooperation; Cornell Lab of Ornithology; Cultural practices and environmental certification of beaches, Universidad de la Costa, Colombia, [grant number INV.1106–01–002-15, 2020–21]; Department of Conservation New Zealand; Direction de l'Environnement de Polynésie Française; Disney Conservation Fund; DSI-NRF Centre of; Excellence at the FitzPatrick Institute of African Ornithology; Ecology Project International; Emin Özgür; Environment and Climate Change Canada; European Community: RTD programme - Species Support to Policies; European Community's Seventh Framework Programme; European Union; European Union's Horizon 2020 research and innovation programme, Marie Skłodowska-Curie, [grant number 798091, 794938]; Faruk Eczacıbaşı; Faruk Yalçın Zoo; Field research funding was provided by King Abdullah University of Science and Technology; Fish and Wildlife Compensation Program; Fisheries and Oceans Canada; Florida Fish and Wildlife Conservation Commission, [grant numbers FWC-12164, FWC-14026, FWC-19050]; Fondo Europeo de Desarrollo Regional; Fonds québécois de la recherche nature et technologies; Foundation Segré; Fundação para a Ciência e a Tecnologia (FCT Portugal); Galapagos National Park Directorate research, [grant number PC-41-20]; Gordon and Betty Moore Foundation, [grant number GBMF9881 and GBMF 8072]; Government of Tristan da Cunha; Habitat; Conservation Trust Foundation; Holsworth Wildlife Research Endowment; Institute of Biology of the Southern Seas, Sevastopol, Russia; Instituto de Investigación de Recursos Biológicos Alexander von Humboldt; Instituto Nacional de Pesquisas Espaciais (INPE), Brazil; Israeli Academy of Science's Adams Fellowship; King Family Trust; Labex, CORAIL, France; Liber Ero Fellowship; LIFE (European Union), [grant number LIFE16 NAT/BG/000874]; María de Maeztu Program for Units of Excellence in R&D; Ministry of Science and Innovation, FEDER, SPASIMM,; Spain, [grant number FIS2016–80067-P (AEI/FEDER, UE)]; MOE-Korea, [grant number 2020002990006]; Mohamed bin Zayed Species Conservation Fund; Montreal Space for Life; National Aeronautics and Space Administration (NASA) Earth and Space Science Fellowship Program; National Geographic Society, [grant numbers NGS-82515R-20]; National Natural Science Fund of China; National Oceanic and Atmospheric Administration; National Parks Board, Singapore; National Science and Technology Major Project of China; National Science Foundation, [grant number DEB-1832016]; Natural Environment Research Council of the UK; Natural Sciences and Engineering Research Council of Canada (NSERC), Alliance COVID-19 grant program, [grant numbers ALLRP 550721–20, RGPIN-2014-06229 (year: 2014), RGPIN-2016-05772 (year: 2016)]; Neiser Foundation; Nekton Foundation; Network of Centre of Excellence of Canada: ArcticNet; North Family Foundation; Ocean Tracking Network; Ömer Külahçıoğlu; Oregon State University; Parks Canada Agency (Lake Louise, Yoho, and Kootenay Field Unit); Pew Charitable Trusts; Porsim Kanaf partnership; President's International Fellowship Initiative for postdoctoral researchers Chinese Academy of Sciences, [grant number 2019 PB0143]; Red Sea Research Center; Regional Government of the Azores, [grant number M3.1a/F/025/2015]; Regione Toscana; Rotary Club of Rhinebeck; Save our Seas Foundation; Science & Technology (CSU COAST); Science City Davos, Naturforschende Gesellschaft Davos; Seha İşmen; Sentinelle Nord program from the Canada First Research Excellence Fund; Servizio Foreste e Fauna (Provincia Autonoma di Trento); Sigrid Rausing Trust; Simon Fraser University; Sitka Foundation; Sivil Toplum Geliştirme Merkezi Derneği; South African National Parks (SANParks); South Australian Department for Environment and Water; Southern California Tuna Club (SCTC); Spanish Ministry for the Ecological Transition and the Demographic Challenge; Spanish Ministry of Economy and Competitiveness; Spanish Ministry of Science and Innovation; State of California; Sternlicht Family Foundation; Suna Reyent; Sunshine Coast Regional Council; Tarea Vida, CEMZOC, Universidad de Oriente, Cuba, [grant number 10523, 2020]; Teck Coal; The Hamilton Waterfront Trust; The Ian Potter Foundation, Coastwest, Western Australian State NRM; The Red Sea Development Company; The Wanderlust Fund; The Whitley Fund; Trans-Anatolian Natural Gas Pipeline; Tula Foundation (Hakai Institute); University of Arizona; University of Pisa; US Fish and Wildlife Service; US Geological Survey; Valencian Regional Government; Vermont Center for Ecostudies; Victorian Fisheries Authority; VMRC Fishing License Fund; and Wildlife Warriors Worldwide
    With funding from the Spanish government through the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000928-S

    وصف الملف: application/pdf; text; 18 páginas