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177 results on '"Arkumarev, Volen"'

2. Tracking data highlight the importance of human-induced mortality for large migratory birds at a flyway scale

Author

Serratosa, Juan, Oppel, Steffen, Rotics, Shay, Santangeli, Andrea, Butchart, Stuart H.M., Cano-Alonso, Luis S., Tellería, Jose Luis, Kemp, Ryno, Nicholas, Aaron, Kalvāns, Aigars, Galarza, Aitor, Franco, Aldina M.A., Andreotti, Alessandro, Kirschel, Alexander N.G., Ngari, Alex, Soutullo, Alvaro, Bermejo-Bermejo, Ana, Botha, Andre J., Ferri, Andrea, Evangelidis, Angelos, Cenerini, Anna, Stamenov, Anton, Hernández-Matías, Antonio, Aradis, Arianna, Grozdanov, Atanas P., Rodríguez, Beneharo, Şekercioğlu, Çağan H., Cerecedo-Iglesias, Catuxa, Kassara, Christina, Barboutis, Christos, Bracebridge, Claire, García-Ripollés, Clara, Kendall, Corinne J., Denac, Damijan, Schabo, Dana G., Barber, David R., Popov, Dimitar V., Dobrev, Dobromir D., Mallia, Egidio, Kmetova-Biro, Elena, Álvarez, Ernesto, Buechley, Evan R., Bragin, Evgeny A., Cordischi, Fabrizio, Zengeya, Fadzai M., Monti, Flavio, Mougeot, Francois, Tate, Gareth, Stoyanov, Georgi, Dell'Omo, Giacomo, Lucia, Giuseppe, Gradev, Gradimir, Ceccolini, Guido, Friedemann, Guilad, Bauer, Hans-Günther, Kolberg, Holger, Peshev, Hristo, Catry, Inês, Øien, Ingar J., Alanís, Isidoro Carbonell, Literák, Ivan, Pokrovsky, Ivan, Ojaste, Ivar, Østnes, Jan E., de la Puente, Javier, Real, Joan, Guilherme, João L., González, José C., Fernández-García, José M., Gil, Juan Antonio, Terraube, Julien, Poprach, Karel, Aghababyan, Karen, Klein, Katharina, Bildstein, Keith L., Wolter, Kerri, Janssens, Kjell, Kittelberger, Kyle D., Thompson, Lindy J., AlJahdhami, Mansoor H., Galán, Manuel, Tobolka, Marcin, Posillico, Mario, Cipollone, Mario, Gschweng, Marion, Strazds, Māris, Boorman, Mark, Zvidzai, Mark, Acácio, Marta, Romero, Marta, Wikelski, Martin, Schmidt, Matthias, Sarà, Maurizio, McGrady, Michael J., Dagys, Mindaugas, Mackenzie, Monique L., Al Taq, Muna, Mgumba, Msafiri P., Virani, Munir Z., Kassinis, Nicolaos I., Borgianni, Nicolò, Thie, Nikki, Tsiopelas, Nikos, Anglister, Nili, Farwig, Nina, Sapir, Nir, Kleven, Oddmund, Krone, Oliver, Duriez, Olivier, Spiegel, Orr, Al Nouri, Osama, López-López, Pascual, Byholm, Patrik, Kamath, Pauline L., Mirski, Paweł, Palatitz, Peter, Serroni, Pietro, Raab, Rainer, Buij, Ralph, Žydelis, Ramūnas, Nathan, Ran, Bowie, Rauri C.K., Tsiakiris, Rigas, Hatfield, Richard Stratton, Harel, Roi, Kroglund, Rolf T., Efrat, Ron, Limiñana, Ruben, Javed, Salim, Marinković, Saša P., Rösner, Sascha, Pekarsky, Sasha, Kapila, Shiv R., Marin, Simeon A., Krejčí, Šimon, Giokas, Sinos, Tumanyan, Siranush, Turjeman, Sondra, Krüger, Sonja C., Ewing, Steven R., Stoychev, Stoycho, Nikolov, Stoyan C., Qaneer, Tareq E., Spatz, Theresa, Hadjikyriakou, Thomas G., Mueller, Thomas, Katzner, Todd E., Aarvak, Tomas, Veselovský, Tomáš, Nygård, Torgeir, Mellone, Ugo, Väli, Ülo, Sellis, Urmas, Urios, Vicente, Nemček, Vladimír, Arkumarev, Volen, Getz, Wayne M., Fiedler, Wolfgang, Van den Bossche, Willem, Lehnardt, Yael, and Jones, Victoria R.

Published
2024
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3. Assessing genetic diversity patterns at neutral and adaptive loci to inform population reinforcement of an endangered migratory vulture

Author

Bounas, Anastasios, Saravia-Mullin, Victoria, Méndez, Maria, Arkumarev, Volen, Aghajanyan, Lusine, Ararat, Korsh, Buechley, Evan, Dobrev, Vladimir, Dobrev, Dobromir, Efrat, Ron, Klisurov, Ivaylo, Kret, Elzbieta, Skartsi, Theodora, Oppel, Steffen, Petrov, Rusko, Şekercioğlu, Çağan H., Vaidl, Anton, Donázar, José A., Nikolov, Stoyan C., and Sotiropoulos, Konstantinos

Published
2023
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4. Local colonisations and extinctions of European birds are poorly explained by changes in climate suitability

Author

Howard, Christine, Marjakangas, Emma-Liina, Morán-Ordóñez, Alejandra, Milanesi, Pietro, Abuladze, Aleksandre, Aghababyan, Karen, Ajder, Vitalie, Arkumarev, Volen, Balmer, Dawn E., Bauer, Hans-Günther, Beale, Colin M., Bino, Taulant, Boyla, Kerem Ali, Burfield, Ian J., Burke, Brian, Caffrey, Brian, Chodkiewicz, Tomasz, Del Moral, Juan Carlos, Mazal, Vlatka Dumbovic, Fernández, Néstor, Fornasari, Lorenzo, Gerlach, Bettina, Godinho, Carlos, Herrando, Sergi, Ieronymidou, Christina, Johnston, Alison, Jovicevic, Mihailo, Kalyakin, Mikhail, Keller, Verena, Knaus, Peter, Kotrošan, Dražen, Kuzmenko, Tatiana, Leitão, Domingos, Lindström, Åke, Maxhuni, Qenan, Mihelič, Tomaž, Mikuska, Tibor, Molina, Blas, Nagy, Károly, Noble, David, Øien, Ingar Jostein, Paquet, Jean-Yves, Pladevall, Clara, Portolou, Danae, Radišić, Dimitrije, Rajkov, Saša, Rajković, Draženko Z., Raudonikis, Liutauras, Sattler, Thomas, Saveljić, Darko, Shimmings, Paul, Sjenicic, Jovica, Šťastný, Karel, Stoychev, Stoycho, Strus, Iurii, Sudfeldt, Christoph, Sultanov, Elchin, Szép, Tibor, Teufelbauer, Norbert, Uzunova, Danka, van Turnhout, Chris A. M., Velevski, Metodija, Vikstrøm, Thomas, Vintchevski, Alexandre, Voltzit, Olga, Voříšek, Petr, Wilk, Tomasz, Zurell, Damaris, Brotons, Lluís, Lehikoinen, Aleksi, and Willis, Stephen G.

Published
2023
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5. Increased occurrence of Egyptian vultures in Crete: exploring movement patterns and potential for wintering.

Author

Bounas, Anastasios, Georgopoulou, Elisavet, Arkumarev, Volen, Liapakis, Spiros, Samaritakis, Nikos, Vavylis, Dimitrios, Dobrev, Dobromir, Dobrev, Vladimir, Sotiropoulos, Konstantinos, Xirouchakis, Stavros, Nikolov, Stoyan, and Saravia-Mullin, Victoria

Subjects
BROWNIAN bridges (Mathematics), CLIMATE change, MIGRATORY animals, BIRD migration, MATING grounds, WINTER
Abstract

Migration is an integral part of the annual cycle of many bird species that have evolved to take advantage of spatially segregated, seasonally abundant food resources while avoiding harsh winter conditions. Increasing evidence suggests that long-distance migrants are shortening their migration routes and wintering at higher latitudes closer to their breeding grounds. One potential example of this process are the observations of Egyptian vultures during the winter on the island of Crete. In this study we provide an overview of wintering Egyptian vulture occurrences on the island of Crete, seeking to shed additional light on the species' wintering ecology. To this aim we collated extensive field observations spanning 28 winters from 1995 to 2023 and analysed telemetry data from three tracked vultures. Our results revealed a change in the wintering frequency of Egyptian vultures in the island with an increasing trend since 2015, especially regarding the presence of subadult and adult birds. We found an increased habitat use intensity for open landscapes and agricultural areas compared to other habitat types within Crete, emphasizing the influence of food availability on space utilization. We suggest that the interplay between climate changes, lack of experienced conspecifics and local food availability could have triggered the increasing number of wintering Egyptian vultures in Crete. The implications of this short-stopping behaviour extend to conservation strategies, highlighting the need for the consideration of new wintering sites and the potential threats faced by vultures during this period. We recommend the operation of supplementary feeding stations and actions to reduce the risk of electrocution to be considered as valuable conservation actions in the species' wintering sites in Crete. Monitoring and further research are recommended to assess the long-term impact and viability of this new migration tactic, providing insights into adaptive responses to environmental change. [ABSTRACT FROM AUTHOR]

Published
2024
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6. Global COVID-19 lockdown highlights humans as both threats and custodians of the environment

Author

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

Published
2021
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7. Major threats to a migratory raptor vary geographically along the eastern Mediterranean flyway

Author

Oppel, Steffen, Arkumarev, Volen, Bakari, Samuel, Dobrev, Vladimir, Saravia-Mullin, Victoria, Adefolu, Solomon, Sözüer, Lale Aktay, Apeverga, Paul T., Arslan, Şafak, Barshep, Yahkat, Bino, Taulant, Bounas, Anastasios, Çetin, Turan, Dayyoub, Maher, Dobrev, Dobromir, Duro, Klea, El-Moghrabi, Laith, ElSafoury, Hana, Endris, Ahmed, Asswad, Nabegh Ghazal, Harry, Junior H., Ivande, Sam T., Jbour, Sharif, Kapsalis, Eleftherios, Kret, Elzbieta, Mahamued, Bruktawit A., Manu, Shiiwua A., Mengistu, Solomon, Moussa Zabeirou, Abdoul R., Muhammad, Sulaiman I., Nakev, Slave, Ngari, Alex, Onoja, Joseph, Osta, Maher, Özuslu, Serdar, Petrovski, Nenad, Popgeorgiev, Georgi, Pourchier, Cloé, Qaneer, Tareq, Ruffo, Alazar, Shobrak, Mohammed, Sidiropoulos, Lavrentis, Skartsi, Theodora, Sözüer, Özgün, Stara, Kalliopi, Tesfaye, Million, Topi, Mirjan, Vavylis, Dimitrios, Velevski, Metodija, Vorpsi, Zydjon, Wondafrash, Mengistu, Xeka, Erald, Yeniyurt, Can, Yordanov, Emil, and Nikolov, Stoyan C.

Published
2021
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9. Egyptian vulture Neophron percnopterus

Author

Oppel, Steffen, primary, Buechley, Evan R., additional, López-López, Pascual, additional, Phipps, Louis, additional, Arkumarev, Volen, additional, Bounas, Anastasios, additional, Williams, Freddie, additional, Dobrev, Vladimir, additional, Dobrev, Dobromir, additional, Stoychev, Stoycho, additional, Kret, Elzbieta, additional, Cenerini, Anna, additional, Ceccolini, Guido, additional, Saravia, Victoria, additional, and Nikolov, Stoyan C., additional

Published
2021
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10. Tracking data highlight the importance of human-induced mortality for large migratory birds at a flyway scale

Author

Universidad de Alicante. Departamento de Ciencias Ambientales y Recursos Naturales, Universidad de Alicante. Departamento de Didáctica General y Didácticas Específicas, Universidad de Alicante. Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías, Serratosa, Juan, Oppel, Steffen, Rotics, Shay, Santangeli, Andrea, Butchart, Stuart H.M., Cano-Alonso, Luis S., Tellería Jorge, José Luis, Kemp, Ryno, Nicholas, Aaron, Kalvāns, Aigars, Galarza, Aitor, Franco, Aldina M.A., Andreotti, Alessandro, Kirschel, Alexander N.G., Ngari, Alex, Soutullo, Alvaro, Bermejo, Ana, Botha, Andre J., Ferri, Andrea, Evangelidis, Angelos, Cenerini, Anna, Stamenov, Anton, Hernández-Matías, Antonio, Aradis, Arianna, Grozdanov, Atanas P., Rodríguez, Beneharo, Sekercioğlu, Cağan H., Cerecedo-Iglesias, Catuxa, Kassara, Christina, Barboutis, Christos, Bracebridge, Claire, García Ripollés, Clara, Kendall, Corinne J., Denac, Damijan, Schabo, Dana G., Barber, David R., Popov, Dimitar V., Dobrev, Dobromir D., Mallia, Egidio, Kmetova-Biro, Elena, Álvarez, Ernesto, Buechley, Evan R., Bragin, Evgeny A., Cordischi, Fabrizio, Zengeya, Fadzai M., Monti, Flavio, Mougeot, François, Tate, Gareth, Stoyanov, Georgi, Dell’Omo, Giacomo, Lucia, Giuseppe, Gradev, Gradimir, Ceccolini, Guido, Friedemann, Guilad, Bauer, Hans-Günther, Kolberg, Holger, Peshev, Hristo, Catry, Inês, Øien, Ingar J., Carbonell Alanís, Isidoro, Literák, Ivan, Pokrovsky, Ivan, Ojaste, Ivar, Østnes, Jan E., Puente, Javier de la, Real, Joan, Guilherme, João L., González, José C., Fernández-García, José M., Gil, Juan Antonio, Terraube, Julien, Poprach, Karel, Aghababyan, Karen, Klein, Katharina, Bildstein, Keith L., Wolter, Kerri, Janssens, Kjell, Kittelberger, Kyle D., Thompson, Lindy J., AlJahdhami, Mansoor H., Galán, Manuel, Tobolka, Marcin, Posillico, Mario, Cipollone, Mario, Gschweng, Marion, Strazds, Māris, Boorman, Mark, Zvidzai, Mark, Acácio, Marta, Romero, Marta, Wikelski, Martin, Schmidt, Matthias, Sarà, Maurizio, McGrady, Michael J., Dagys, Mindaugas, Mackenzie, Monique L., Al Taq, Muna, Mgumba, Msafiri P., Virani, Munir Z., Kassinis, Nicolaos I., Borgianni, Nicolò, Thie, Nikki, Tsiopelas, Nikos, Anglister, Nili, Farwig, Nina, Sapir, Nir, Kleven, Oddmund, Krone, Oliver, Duriez, Olivier, Spiegel, Orr, Al Nouri, Osama, López-López, Pascual, Byholm, Patrik, Kamath, Pauline L., Mirski, Paweł, Palatitz, Peter, Serroni, Pietro, Raab, Rainer, Buij, Ralph, Žydelis, Ramūnas, Nathan, Ran, Bowie, Rauri C.K., Tsiakiris, Rigas, Hatfield, Richard Stratton, Harel, Roi, Kroglund, Rolf T., Efrat, Ron, Limiñana, Rubén, Javed, Salim, Marinković, Saša P., Rösner, Sascha, Pekarsky, Sasha, Kapila, Shiv R., Marin, Simeon, Krejčí, Šimon, Giokas, Sinos, Tumanyan, Siranush, Turjeman, Sondra, Krüger, Sonja C., Ewing, Steven R., Stoychev, Stoycho, Nikolov, Stoyan C., Qaneer, Tareq E., Spatz, Theresa, Hadjikyriakou, Thomas G., Mueller, Thomas, Katzner, Todd E., Aarvak, Tomas, Veselovský, Tomáš, Nygård, Torgeir, Mellone, Ugo, Väli, Ülo, Sellis, Urmas, Urios, Vicente, Nemček, Vladimír, Arkumarev, Volen, Getz, Wayne M., Fiedler, Wolfgang, Van den Bossche, Willem, Lehnardt, Yael, Jones, Victoria R., Universidad de Alicante. Departamento de Ciencias Ambientales y Recursos Naturales, Universidad de Alicante. Departamento de Didáctica General y Didácticas Específicas, Universidad de Alicante. Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías, Serratosa, Juan, Oppel, Steffen, Rotics, Shay, Santangeli, Andrea, Butchart, Stuart H.M., Cano-Alonso, Luis S., Tellería Jorge, José Luis, Kemp, Ryno, Nicholas, Aaron, Kalvāns, Aigars, Galarza, Aitor, Franco, Aldina M.A., Andreotti, Alessandro, Kirschel, Alexander N.G., Ngari, Alex, Soutullo, Alvaro, Bermejo, Ana, Botha, Andre J., Ferri, Andrea, Evangelidis, Angelos, Cenerini, Anna, Stamenov, Anton, Hernández-Matías, Antonio, Aradis, Arianna, Grozdanov, Atanas P., Rodríguez, Beneharo, Sekercioğlu, Cağan H., Cerecedo-Iglesias, Catuxa, Kassara, Christina, Barboutis, Christos, Bracebridge, Claire, García Ripollés, Clara, Kendall, Corinne J., Denac, Damijan, Schabo, Dana G., Barber, David R., Popov, Dimitar V., Dobrev, Dobromir D., Mallia, Egidio, Kmetova-Biro, Elena, Álvarez, Ernesto, Buechley, Evan R., Bragin, Evgeny A., Cordischi, Fabrizio, Zengeya, Fadzai M., Monti, Flavio, Mougeot, François, Tate, Gareth, Stoyanov, Georgi, Dell’Omo, Giacomo, Lucia, Giuseppe, Gradev, Gradimir, Ceccolini, Guido, Friedemann, Guilad, Bauer, Hans-Günther, Kolberg, Holger, Peshev, Hristo, Catry, Inês, Øien, Ingar J., Carbonell Alanís, Isidoro, Literák, Ivan, Pokrovsky, Ivan, Ojaste, Ivar, Østnes, Jan E., Puente, Javier de la, Real, Joan, Guilherme, João L., González, José C., Fernández-García, José M., Gil, Juan Antonio, Terraube, Julien, Poprach, Karel, Aghababyan, Karen, Klein, Katharina, Bildstein, Keith L., Wolter, Kerri, Janssens, Kjell, Kittelberger, Kyle D., Thompson, Lindy J., AlJahdhami, Mansoor H., Galán, Manuel, Tobolka, Marcin, Posillico, Mario, Cipollone, Mario, Gschweng, Marion, Strazds, Māris, Boorman, Mark, Zvidzai, Mark, Acácio, Marta, Romero, Marta, Wikelski, Martin, Schmidt, Matthias, Sarà, Maurizio, McGrady, Michael J., Dagys, Mindaugas, Mackenzie, Monique L., Al Taq, Muna, Mgumba, Msafiri P., Virani, Munir Z., Kassinis, Nicolaos I., Borgianni, Nicolò, Thie, Nikki, Tsiopelas, Nikos, Anglister, Nili, Farwig, Nina, Sapir, Nir, Kleven, Oddmund, Krone, Oliver, Duriez, Olivier, Spiegel, Orr, Al Nouri, Osama, López-López, Pascual, Byholm, Patrik, Kamath, Pauline L., Mirski, Paweł, Palatitz, Peter, Serroni, Pietro, Raab, Rainer, Buij, Ralph, Žydelis, Ramūnas, Nathan, Ran, Bowie, Rauri C.K., Tsiakiris, Rigas, Hatfield, Richard Stratton, Harel, Roi, Kroglund, Rolf T., Efrat, Ron, Limiñana, Rubén, Javed, Salim, Marinković, Saša P., Rösner, Sascha, Pekarsky, Sasha, Kapila, Shiv R., Marin, Simeon, Krejčí, Šimon, Giokas, Sinos, Tumanyan, Siranush, Turjeman, Sondra, Krüger, Sonja C., Ewing, Steven R., Stoychev, Stoycho, Nikolov, Stoyan C., Qaneer, Tareq E., Spatz, Theresa, Hadjikyriakou, Thomas G., Mueller, Thomas, Katzner, Todd E., Aarvak, Tomas, Veselovský, Tomáš, Nygård, Torgeir, Mellone, Ugo, Väli, Ülo, Sellis, Urmas, Urios, Vicente, Nemček, Vladimír, Arkumarev, Volen, Getz, Wayne M., Fiedler, Wolfgang, Van den Bossche, Willem, Lehnardt, Yael, and Jones, Victoria R.

Abstract

Human-induced direct mortality affects huge numbers of birds each year, threatening hundreds of species worldwide. Tracking technologies can be an important tool to investigate temporal and spatial patterns of bird mortality as well as their drivers. We compiled 1704 mortality records from tracking studies across the African-Eurasian flyway for 45 species, including raptors, storks, and cranes, covering the period from 2003 to 2021. Our results show a higher frequency of human-induced causes of mortality than natural causes across taxonomic groups, geographical areas, and age classes. Moreover, we found that the frequency of human-induced mortality remained stable over the study period. From the human-induced mortality events with a known cause (n = 637), three main causes were identified: electrocution (40.5 %), illegal killing (21.7 %), and poisoning (16.3 %). Additionally, combined energy infrastructure-related mortality (i.e., electrocution, power line collision, and wind-farm collision) represented 49 % of all human-induced mortality events. Using a random forest model, the main predictors of human-induced mortality were found to be taxonomic group, geographic location (latitude and longitude), and human footprint index value at the location of mortality. Despite conservation efforts, human drivers of bird mortality in the African-Eurasian flyway do not appear to have declined over the last 15 years for the studied group of species. Results suggest that stronger conservation actions to address these threats across the flyway can reduce their impacts on species. In particular, projected future development of energy infrastructure is a representative example where application of planning, operation, and mitigation measures can enhance bird conservation.

Published
2024

14. Assessing genetic diversity patterns at neutral and adaptive loci to inform population reinforcement of an endangered migratory vulture

Author

Şekercioğlu, Çağan Hakkı (ORCID 0000-0003-3193-0377 & YÖK ID 327589), Bounas, Anastasios; Saravia-Mullin, Victoria; Méndez, Maria; Arkumarev, Volen; Aghajanyan, Lusine; Ararat, Korsh; Buechley, Evan; Dobrev, Vladimir; Dobrev, Dobromir; Efrat, Ron; Klisurov, Ivaylo; Kret, Elzbieta); Skartsi, Theodora; Oppel, Steffen; Petrov, Rusko; Vaidl, Anton; Donázar, José A.; Nikolov, Stoyan C.; Sotiropoulos, Konstantinos, College of Sciences, Department of Molecular Biology and Genetics, Şekercioğlu, Çağan Hakkı (ORCID 0000-0003-3193-0377 & YÖK ID 327589), Bounas, Anastasios; Saravia-Mullin, Victoria; Méndez, Maria; Arkumarev, Volen; Aghajanyan, Lusine; Ararat, Korsh; Buechley, Evan; Dobrev, Vladimir; Dobrev, Dobromir; Efrat, Ron; Klisurov, Ivaylo; Kret, Elzbieta); Skartsi, Theodora; Oppel, Steffen; Petrov, Rusko; Vaidl, Anton; Donázar, José A.; Nikolov, Stoyan C.; Sotiropoulos, Konstantinos, College of Sciences, and Department of Molecular Biology and Genetics

Abstract

One of the primary goals of conservation translocation programs should be the maintenance of both population demographic stability and genetic diversity. Here, we provide genetic management recommendations to inform a population reinforcement of the declining Egyptian Vulture population in the Balkans. Specifically, we examined whether the number of released individuals is sufficient to prevent genetic diversity loss due to random genetic drift and what the origin of the individuals should be that comprise the captive breeding pool. To this aim, we estimated and assessed genetic diversity levels and genetic structure of Egyptian Vulture populations across much of the species’ range using both neutral and non-neutral candidate loci involved in migration. We then evaluated the effects of the currently proposed population management scheme and candidate source populations on retaining allelic diversity. Our results show low differentiation values among populations and absence of genetic structure which point to past high gene flow. Furthermore, there was no predicted significant impact of different source populations on the genetic diversity of the recipient Balkan population. We also found that the declining Egyptian Vulture population in the Balkans still retains high levels of genetic diversity and therefore genetic diversity restoration is not currently needed. However, without any management, diversity is likely to decrease fast because of increased genetic drift as the population size continues to decline. Population reinforcement with nine birds per year for 20 years would provide sufficient demographic support for the population to retain > 85% of rare allelic diversity. Birds originating from the Balkans would ensure ecological and behavioral similarity and thus would be the best option for reinforcement. Nevertheless, our results demonstrate that to prevent further population contraction and loss of adaptive alleles, releasing individuals of different origin, European Union; HEAL-Link Greece; LIFE projects; “The Return of the Neophron” (LIFE programme); “Egyptian Vulture New LIFE” (LIFE programme, www.LifeNeophron.eu); Leventis Foundation and the MAVA Foundation; Israeli Academy of Science’s Adams Fellowship

Published
2023

16. Hotspots in the grid: Avian sensitivity and vulnerability to collision risk from energy infrastructure interactions in Europe and North Africa

Author

Gauld, Jethro G., Silva, João P., Atkinson, Philip W., Record, Paul, Acácio, Marta, Arkumarev, Volen, Blas, Julio, Bouten, Willem, Burton, Niall, Catry, Inês, Champagnon, Jocelyn, Clewley, Gary D., Dagys, Mindaugas, Duriez, Olivier, Exo, Klaus Michael, Fiedler, Wolfgang, Flack, Andrea, Friedemann, Guilad, Fritz, Johannes, Garcia-Ripolles, Clara, Garthe, Stefan, Giunchi, Dimitri, Grozdanov, Atanas, Harel, Roi, Humphreys, Elizabeth M., Janssen, René, Kölzsch, Andrea, Kulikova, Olga, Lameris, Thomas K., López-López, Pascual, Masden, Elizabeth A., Monti, Flavio, Nathan, Ran, Nikolov, Stoyan, Oppel, Steffen, Peshev, Hristo, Phipps, Louis, Pokrovsky, Ivan, Ross-Smith, Viola H., Saravia, Victoria, Scragg, Emily S., Sforzi, Andrea, Stoynov, Emilian, Thaxter, Chris, Van Steelant, Wouter, van Toor, Mariëlle, Vorneweg, Bernd, Waldenström, Jonas, Wikelski, Martin, Žydelis, Ramūnas, Franco, Aldina M.A., Gauld, Jethro G., Silva, João P., Atkinson, Philip W., Record, Paul, Acácio, Marta, Arkumarev, Volen, Blas, Julio, Bouten, Willem, Burton, Niall, Catry, Inês, Champagnon, Jocelyn, Clewley, Gary D., Dagys, Mindaugas, Duriez, Olivier, Exo, Klaus Michael, Fiedler, Wolfgang, Flack, Andrea, Friedemann, Guilad, Fritz, Johannes, Garcia-Ripolles, Clara, Garthe, Stefan, Giunchi, Dimitri, Grozdanov, Atanas, Harel, Roi, Humphreys, Elizabeth M., Janssen, René, Kölzsch, Andrea, Kulikova, Olga, Lameris, Thomas K., López-López, Pascual, Masden, Elizabeth A., Monti, Flavio, Nathan, Ran, Nikolov, Stoyan, Oppel, Steffen, Peshev, Hristo, Phipps, Louis, Pokrovsky, Ivan, Ross-Smith, Viola H., Saravia, Victoria, Scragg, Emily S., Sforzi, Andrea, Stoynov, Emilian, Thaxter, Chris, Van Steelant, Wouter, van Toor, Mariëlle, Vorneweg, Bernd, Waldenström, Jonas, Wikelski, Martin, Žydelis, Ramūnas, and Franco, Aldina M.A.

Abstract

Wind turbines and power lines can cause bird mortality due to collision or electrocution. The biodiversity impacts of energy infrastructure (EI) can be minimised through effective landscape-scale planning and mitigation. The identification of high-vulnerability areas is urgently needed to assess potential cumulative impacts of EI while supporting the transition to zero carbon energy. We collected GPS location data from 1,454 birds from 27 species susceptible to collision within Europe and North Africa and identified areas where tracked birds are most at risk of colliding with existing EI. Sensitivity to EI development was estimated for wind turbines and power lines by calculating the proportion of GPS flight locations at heights where birds were at risk of collision and accounting for species' specific susceptibility to collision. We mapped the maximum collision sensitivity value obtained across all species, in each 5 × 5 km grid cell, across Europe and North Africa. Vulnerability to collision was obtained by overlaying the sensitivity surfaces with density of wind turbines and transmission power lines. Results: Exposure to risk varied across the 27 species, with some species flying consistently at heights where they risk collision. For areas with sufficient tracking data within Europe and North Africa, 13.6% of the area was classified as high sensitivity to wind turbines and 9.4% was classified as high sensitivity to transmission power lines. Sensitive areas were concentrated within important migratory corridors and along coastlines. Hotspots of vulnerability to collision with wind turbines and transmission power lines (2018 data) were scattered across the study region with highest concentrations occurring in central Europe, near the strait of Gibraltar and the Bosporus in Turkey. Synthesis and applications. We identify the areas of Europe and North Africa that are most sensitive for the specific populations of birds for which sufficient GPS tracking data at hig

Published
2022

17. Hotspots in the grid: Avian sensitivity and vulnerability to collision risk from energy infrastructure interactions in Europe and North Africa

Author

Gauld, Jethro G., primary, Silva, João P., additional, Atkinson, Philip W., additional, Record, Paul, additional, Acácio, Marta, additional, Arkumarev, Volen, additional, Blas, Julio, additional, Bouten, Willem, additional, Burton, Niall, additional, Catry, Inês, additional, Champagnon, Jocelyn, additional, Clewley, Gary D., additional, Dagys, Mindaugas, additional, Duriez, Olivier, additional, Exo, Klaus‐Michael, additional, Fiedler, Wolfgang, additional, Flack, Andrea, additional, Friedemann, Guilad, additional, Fritz, Johannes, additional, Garcia‐Ripolles, Clara, additional, Garthe, Stefan, additional, Giunchi, Dimitri, additional, Grozdanov, Atanas, additional, Harel, Roi, additional, Humphreys, Elizabeth M., additional, Janssen, René, additional, Kölzsch, Andrea, additional, Kulikova, Olga, additional, Lameris, Thomas K., additional, López‐López, Pascual, additional, Masden, Elizabeth A., additional, Monti, Flavio, additional, Nathan, Ran, additional, Nikolov, Stoyan, additional, Oppel, Steffen, additional, Peshev, Hristo, additional, Phipps, Louis, additional, Pokrovsky, Ivan, additional, Ross‐Smith, Viola H., additional, Saravia, Victoria, additional, Scragg, Emily S., additional, Sforzi, Andrea, additional, Stoynov, Emilian, additional, Thaxter, Chris, additional, Van Steelant, Wouter, additional, van Toor, Mariëlle, additional, Vorneweg, Bernd, additional, Waldenström, Jonas, additional, Wikelski, Martin, additional, Žydelis, Ramūnas, additional, and Franco, Aldina M. A., additional

Published
2022
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19. Population reinforcement and demographic changes needed to stabilise the population of a migratory vulture

Author

Oppel, Steffen, primary, Saravia, Victoria, additional, Bounas, Anastasios, additional, Arkumarev, Volen, additional, Kret, Elzbieta, additional, Dobrev, Vladimir, additional, Dobrev, Dobromir, additional, Kordopatis, Panagiotis, additional, Skartsi, Theodora, additional, Velevski, Metodija, additional, Petrovski, Nenad, additional, Bino, Taulant, additional, Topi, Mirjan, additional, Klisurov, Ivaylo, additional, Stoychev, Stoycho, additional, and Nikolov, Stoyan C., additional

Published
2021
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20. Long-term size and range changes of the Griffon Vulture Gyps fulvus population in the Balkans: a review – CORRIGENDUM

Author

DOBREV, DOBROMIR, primary, TSIAKIRIS, RIGAS, additional, SKARTSI, THEODORA, additional, DOBREV, VLADIMIR, additional, ARKUMAREV, VOLEN, additional, STARA, KALLIOPI, additional, STAMENOV, ANTON, additional, PROBONAS, NIKOS, additional, KOMINOS, THEODOROS, additional, GALANAKI, ANTONIA, additional, KRET, ELZBIETA, additional, HALLMANN, BEN, additional, GRUBAČ, BRATISLAV, additional, SUŠIĆ, GORAN, additional, MARINKOVIĆ, SAŠA, additional, HRIBŠEK, IRENA, additional, SKORIĆ, STEFAN, additional, JERRENTRUP, HANS, additional, LUCIĆ, VEDRAN, additional, KAPELJ, SVEN, additional, STOYANOV, GEORGI, additional, ZAKKAK, SYLVIA, additional, HRISTOV, HRISTO, additional, STOYCHEV, STOYCHO, additional, SIDIROPOULOS, LAVRENTIS, additional, BINO, TAULANT, additional, and DEMERDZHIEV, DIMITAR, additional

Published
2021
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22. Electric infrastructure poses a significant threat at congregation sites of the globally threatened Steppe Eagle Aquila nipalensis in Saudi Arabia

Author

SHOBRAK, MOHAMMED, primary, ALASMARI, SAHEEM, additional, ALQTHAMI, ABDULAZIZ, additional, ALQTHAMI, FAHAD, additional, AL-OTAIBI, ABDOULRAHMAN, additional, ZOUBI, MOHAMMAD AL, additional, MOGHRABI, LAITH EL, additional, JBOUR, SHARIF, additional, ASSWAD, NABEGH GHAZAL, additional, OPPEL, STEFFEN, additional, ARKUMAREV, VOLEN, additional, and NIKOLOV, STOYAN C., additional

Published
2021
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24. Long-term size and range changes of the Griffon Vulture Gyps fulvus population in the Balkans: a review

Author

Dobrev, Dobromir, Tsiakiris, Rigas, Skartsi, Theodora, Dobrev, Vladimir, Arkumarev, Volen, Stara, Kalliopi, Stamenov, Anton, Probonas, Nikos, Kominos, Theodoros, Galanaki, Antonia, Kret, Elzbieta, Hallmann, Ben, Grubac, Bratislav, Susic, Goran, Marinković, Saša, Hribsek, Irena, Skorić, Stefan, Jerrentrup, Hans, Lucic, Vedran, Kapelj, Sven, Stoyanov, Georgi, Zakkak, Sylvia, Hristov, Hristo, Stoychev, Stoycho, Sidiropoulos, Lavrentis, Bino, Taulant, Demerdzhiev, Dimitar, Dobrev, Dobromir, Tsiakiris, Rigas, Skartsi, Theodora, Dobrev, Vladimir, Arkumarev, Volen, Stara, Kalliopi, Stamenov, Anton, Probonas, Nikos, Kominos, Theodoros, Galanaki, Antonia, Kret, Elzbieta, Hallmann, Ben, Grubac, Bratislav, Susic, Goran, Marinković, Saša, Hribsek, Irena, Skorić, Stefan, Jerrentrup, Hans, Lucic, Vedran, Kapelj, Sven, Stoyanov, Georgi, Zakkak, Sylvia, Hristov, Hristo, Stoychev, Stoycho, Sidiropoulos, Lavrentis, Bino, Taulant, and Demerdzhiev, Dimitar

Abstract

The Eurasian Griffon Vulture Gyps fulvus is a large Palearctic, Indohimalayan and Afrotropical Old-World vulture. The species' range is vast, encompassing territories from the Pyrenees to the Himalayas. We reviewed and analysed a long-term data set for Griffon Vulture in the Balkans to estimate the change in its population size and range between 1980 and 2019. After a large historical decline, the Griffon Vulture population slightly increased in the last 39 years (lambda = 1.02) and reached 445-565 pairs in 2019. We recorded a gradual increase of Griffon Vulture subpopulations in Serbia (lambda = 1.08 +/- 0.003), Bulgaria (lambda = 1.08 +/- 0.003) and Croatia (lambda = 1.05 +/- 0.005) and steep to a moderate decline of the species subpopulations in Greece (lambda = 0.88 +/- 0.005) and North Macedonia (lambda = 0.94 +/- 0.01). However, species range contracted to half of its former range in the same period. It occurred in 42 UTM squares in the 1980-1990 period and only 20 UTM squares between 2011 and 2019 and concentrated into three source subpopulations in Bulgaria, Serbia, and Croatia. Following reintroductions of the Griffon Vulture in Bulgaria, new colonies were formed at three novel localities after 2010. Regular movements of individuals between the different subpopulations exist nowadays. Therefore, preservation of both current and former core areas used for breeding and roosting is essential for species conservation in the region. However, the Griffon Vulture still faces severe threats and risk of local extinction. Various hazards such as poisoning, collision with energy infrastructure, disturbance and habitat alteration are depleting the status of the Balkan population and its full recovery. Further studies should analyse age-specific survival and mortality, recruitment, genetic relatedness, spatial use to inform the viability of this population in the future.

Published
2021

25. Differential survival throughout the full annual cycle of a migratory bird presents a life‐history trade‐off

Author

Buechley, Evan R., primary, Oppel, Steffen, additional, Efrat, Ron, additional, Phipps, W. Louis, additional, Carbonell Alanís, Isidoro, additional, Álvarez, Ernesto, additional, Andreotti, Alessandro, additional, Arkumarev, Volen, additional, Berger‐Tal, Oded, additional, Bermejo Bermejo, Ana, additional, Bounas, Anastasios, additional, Ceccolini, Guido, additional, Cenerini, Anna, additional, Dobrev, Vladimir, additional, Duriez, Olivier, additional, García, Javier, additional, García‐Ripollés, Clara, additional, Galán, Manuel, additional, Gil, Alberto, additional, Giraud, Lea, additional, Hatzofe, Ohad, additional, Iglesias‐Lebrija, Juan José, additional, Karyakin, Igor, additional, Kobierzycki, Erik, additional, Kret, Elzbieta, additional, Loercher, Franziska, additional, López‐López, Pascual, additional, Miller, Ygal, additional, Mueller, Thomas, additional, Nikolov, Stoyan C., additional, de la Puente, Javier, additional, Sapir, Nir, additional, Saravia, Victoria, additional, Şekercioğlu, Çağan H., additional, Sillett, T. Scott, additional, Tavares, José, additional, Urios, Vicente, additional, and Marra, Peter P., additional

Published
2021
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27. Pursuit of 'sustainable' development may contribute to the vulture crisis in East Africa.

Author

OPPEL, STEFFEN, RUFFO, ALAZAR DAKA, BAKARI, SAMUEL, TESFAYE, MILLION, MENGISTU, SOLOMON, WONDAFRASH, MENGISTU, ENDRIS, AHMED, POURCHIER, CLOÉ, NGARI, ALEX, ARKUMAREV, VOLEN, and NIKOLOV, STOYAN C.

Abstract

Summary: The United Nations Sustainable Development Goals aim to improve livelihoods and maintain functioning ecosystems, and include the provision of electricity and the prevention of desertification. We show that the pursuit of those two goals can lead to developments that put critical ecosystem functions at risk. Vultures are scavengers that provide sanitary ecosystem services, but their populations across Africa are declining due to poisoning, electrocution, and collision with power infrastructure. The extent to which the pursuit of sustainable development threatens vultures in Africa is unclear. We surveyed 227 km of powerlines in Ethiopia, which revealed bird mortality (0.15 vulture carcasses / km) at power infrastructure constructed under a National Electrification Programme to provide universal electricity access by 2025. We also interviewed 190 local pastoralists in 10 areas about livelihood challenges, which revealed that the bush Prosopis juliflora, which was originally introduced to prevent desertification but then invaded north-eastern Ethiopia, increased livestock predation and motivated the use of poison to control predators. Actions to increase universal access to electricity and to reduce desertification therefore have undesired side-effects that increase vulture mortality through electrocution and poisoning. To avoid negatively affecting local vulture populations and the services they provide, we urge governments to use infrastructure designs that minimise the risk of electrocution and assist pastoralists to protect their livestock and reduce the risk of poisoning to vultures and other wildlife. [ABSTRACT FROM AUTHOR]

Published
2022
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28. Electric infrastructure poses a significant threat at congregation sites of the globally threatened Steppe Eagle Aquila nipalensis in Saudi Arabia.

Author

SHOBRAK, MOHAMMED, ALASMARI, SAHEEM, ALQTHAMI, ABDULAZIZ, ALQTHAMI, FAHAD, AL-OTAIBI, ABDOULRAHMAN, AL ZOUBI, MOHAMMAD, EL MOGHRABI, LAITH, JBOUR, SHARIF, GHAZAL ASSWAD, NABEGH, OPPEL, STEFFEN, ARKUMAREV, VOLEN, and NIKOLOV, STOYAN C.

Abstract

Summary: Saudi Arabia is the fastest growing electricity consumer in the Middle East, with a rapidly expanding network of powerlines. Bird mortality through electrocution and collision has been recorded in the country, but so far there is little information as to how much the electricity infrastructure affects globally threatened raptor populations that migrate to Saudi Arabia. In 2019, the world's largest wintering congregation of Steppe Eagles Aquila nipalensis was discovered near a rubbish dump in central Saudi Arabia. We evaluated whether powerlines in the vicinity of this, and another congregation site, caused mortality of large birds. In November 2019, we surveyed powerlines within 6 km of two focal rubbish dumps at Al Qunfudhah (12.4 km) and Ushaiqer (2 km). We found 52 carcasses of five species, of which 85% were Steppe Eagles. Based on the age of these carcasses, we coarsely extrapolate that 14.4 km of powerlines near these two congregation sites may kill 94–240 Steppe Eagles per winter, representing up to 0.3% of their global population. We call for the urgent safeguarding of powerlines that cause mortality near known Steppe Eagle congregation sites, and the adoption and implementation of regulations that ensure that future infrastructure is constructed with designs that are safe for birds. [ABSTRACT FROM AUTHOR]

Published
2022
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29. Long-term size and range changes of the Griffon Vulture Gyps fulvus population in the Balkans: a review.

Author

DOBREV, DOBROMIR, TSIAKIRIS, RIGAS, SKARTSI, THEODORA, DOBREV, VLADIMIR, ARKUMAREV, VOLEN, STARA, KALLIOPI, STAMENOV, ANTON, PROBONAS, NIKOS, KOMINOS, THEODOROS, GALANAKI, ANTONIA, KRET, ELZBIETA, HALLMANN, BEN, GRUBAČ, BRATISLAV, SUŠIĆ, GORAN, MARINKOVIĆ, SAŠA, HRIBŠEK, IRENA, SKORIĆ, STEFAN, JERRENTRUP, HANS, LUCIĆ, VEDRAN, and KAPELJ, SVEN

Abstract

Summary: The Eurasian Griffon Vulture Gyps fulvus is a large Palearctic, Indohimalayan and Afrotropical Old-World vulture. The species' range is vast, encompassing territories from the Pyrenees to the Himalayas. We reviewed and analysed a long-term data set for Griffon Vulture in the Balkans to estimate the change in its population size and range between 1980 and 2019. After a large historical decline, the Griffon Vulture population slightly increased in the last 39 years (λ = 1.02) and reached 445–565 pairs in 2019. We recorded a gradual increase of Griffon Vulture subpopulations in Serbia (λ = 1.08 ± 0.003), Bulgaria (λ = 1.08 ± 0.003) and Croatia (λ = 1.05 ± 0.005) and steep to a moderate decline of the species subpopulations in Greece (λ = 0.88 ± 0.005) and North Macedonia (λ = 0.94 ± 0.01). However, species range contracted to half of its former range in the same period. It occurred in 42 UTM squares in the 1980–1990 period and only 20 UTM squares between 2011 and 2019 and concentrated into three source subpopulations in Bulgaria, Serbia, and Croatia. Following reintroductions of the Griffon Vulture in Bulgaria, new colonies were formed at three novel localities after 2010. Regular movements of individuals between the different subpopulations exist nowadays. Therefore, preservation of both current and former core areas used for breeding and roosting is essential for species conservation in the region. However, the Griffon Vulture still faces severe threats and risk of local extinction. Various hazards such as poisoning, collision with energy infrastructure, disturbance and habitat alteration are depleting the status of the Balkan population and its full recovery. Further studies should analyse age-specific survival and mortality, recruitment, genetic relatedness, spatial use to inform the viability of this population in the future. [ABSTRACT FROM AUTHOR]

Published
2022
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34. Methodology and role of the supplementary feeding stations in Bulgaria.

Author

Dobrev, Dobromir, Stamenov, Anton, Arkumarev, Volen, Angelov, Ivaylo, Delchev, Atanas, Dobrev, Vladimir, Hristov, Hristo, and Demerdzhiev, Dimitar

Abstract

The article focuses on the essential role of supplementary feeding stations (SFS) in Bulgaria, highlighting their history, regulatory compliance, and impact on vulture conservation, with recent efforts to establish a network of local feeding sites (LFS) for enhanced conservation measures.

Published
2023
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35. Status and threats for the Egyptian Vulture in Albania.

Author

Topi, Mirjan, Dobrev, Vladimir, Hallmann, Ben, Dobrev, Dobromir, Arkumarev, Volen, Saravia-Mullin, Victoria, Bounas, Anastasios, Pappaionnou, Haritakis, Bino, Taulant, Duro, Klea, Xherri, Xhemal, Vorpsi, Zydjon, Selgjekaj, Ledi, Xeka, Erald, Sevo, Besjana, Loce, Ervis, Saliaj, Oresta, Ziu, Denada, Oppel, Steffen, and Popgeorgiev, Georgi S.

Abstract

The article discusses the ongoing LIFE Egyptian Vulture project in Italy (LIFE16 NAT/IT/000659).

Published
2023
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36. Придвижване и индивидуален участък на белоглавия лешояд (Gyps fulvus Hablizl, 1783) в България

Author

Arkumarev, Volen, Доц. д-р Дилян Георгиев Георгиев д.б.н., Проф. д-р Златозар Николаев Боев д.б.н., and Associate Professor PhD, DSc Dilian Georgiev Georgiev, Professor PhD, DSc Zlatozar Nikolaev Boev

Abstract

Изследванията върху екологията и заплахите за лешоядите са изключително актуални в контекста на бързите темпове, с които техните популации намаляват и необходимостта от прилагането на ефективни мерки за опазване. Дисертационният труд представя резултати от най-мащабното на Балканския полуостров изследване на придвижванията и индивидуалните участъци при белоглави лешояди от всички възрастови групи чрез методите на GPS телеметрията. Установени са основните въздушни коридори, които лешоядите използват при търсене на храна в Източните Родопи, миграционните коридори и местата за зимуване на младите белоглави лешояди. За първи път в Европа е проведено проучване, което предоставя количествени данни за значението на площадките за подхранване за изхранване на популация на вида като е определен и хранителният му спектър. Направени са препоръки за природозащитни мерки, които целят ефективното опазване на вида в страната и по пътя на миграция., Most of the Old World vulture species have declining populations and urgent research on some aspects of their ecology and threats is needed to inform an effective conservation strategy for this highly threatened scavenger guilt. This thesis summarizes the results from the most complete GPS telemetry study of the movements and home range of the Griffon Vultures from all age classes on the Balkans. We identified the main flight corridors used between vulture’s breeding colonies and foraging areas in the Eastern Rhodopes. We studied the migration of young individuals and identified their stopover sites and wintering areas. We also studied the importance of vulture feeding stations and the availability of natural food. Based on the results we made recommendations for conservation actions.

Published
2020

37. Assessment of the exposure to environmental toxics in free living European griffons ( Gyps fulvus ) and Cinereous vultures Aegypius monachus ) in the Balkans

Author

Escobar González, María, Herrero-Villar, Marta, Dobrev, Dobromir, Arkumarev, Volen, Stamenov, Anton, Zakkak, Sylvia, Camarero, Pablo R., Mateo, Rafael, and European Commission

Abstract

Trabajo presentado al SETAC (Society of Environmental Toxicology and Chemistry) Europe 30th Annual Meeting: Open Science for Enhanced Global Environmental Protection, celebrado Online del 3 al 7 de mayo de 2020., In some parts of Eastern Europe, vultures suffered a dramatic decline in their populations during the last century, fundamentally due to the intentional use of poisons to kill predators due to the conflicts with extensive livestock farming. Vulture species play a key ecosystem role and are valuable as biomonitoring sentinels for both human and environmental health. Currently, several reintroduction projects are being developed in the Balkan region, and it is necessary to know the potential exposure to some environmental contaminants that vultures may encounter in these reintroduction areas. The aim of this study is to determine organochlorine compounds, lead, cadmium, antibiotics and antiinflammatory drug (NSAIDs) levels in blood of vultures from Bulgaria. Blood samples of European griffons (Gyps fulvus) (N=33) and cinereous vultures (Aegypius monachus) (N=45) were taken. The organochlorine compounds in blood samples were analysed by gas chromatography coupled to an electron capture detector. The analysis of heavy metals in blood samples was performed by atomic absorbance spectroscopy. The analysis of antibiotics and antiinflammatory drugs were performed in blood samples by liquid chromatography coupled to a time-of-flight mass spectrometer. Organochlorine compounds were present in blood samples at very low levels. Antibiotics and NSAIDs were not detected in none of the analysed blood samples. Cadmium levels in blood were low. Lead levels were elevated in some individuals, although these levels were below those compatible with clinical poisoning in birds. It is remarkable that griffon vultures showed markedly higher levels or organochlorine compounds and lead in blood than the cinereous vultures. It must be also highlighted the absence of antibiotics and the relatively low exposure to lead compared with other monitoring studies performed in Spanish vultures., Funding: Greece LIFE 14 NAT/NL/90.

Published
2020

38. Assessment of the exposure to environmental toxics in free living European griffons ( Gyps fulvus ) and Cinereous vultures Aegypius monachus ) in the Balkans

Author

European Commission, Escobar González, María, Herrero-Villar, Marta, Dobrev, Dobromir, Arkumarev, Volen, Stamenov, Anton, Zakkak, Sylvia, Camarero, Pablo R., Mateo, Rafael, European Commission, Escobar González, María, Herrero-Villar, Marta, Dobrev, Dobromir, Arkumarev, Volen, Stamenov, Anton, Zakkak, Sylvia, Camarero, Pablo R., and Mateo, Rafael

Abstract

In some parts of Eastern Europe, vultures suffered a dramatic decline in their populations during the last century, fundamentally due to the intentional use of poisons to kill predators due to the conflicts with extensive livestock farming. Vulture species play a key ecosystem role and are valuable as biomonitoring sentinels for both human and environmental health. Currently, several reintroduction projects are being developed in the Balkan region, and it is necessary to know the potential exposure to some environmental contaminants that vultures may encounter in these reintroduction areas. The aim of this study is to determine organochlorine compounds, lead, cadmium, antibiotics and antiinflammatory drug (NSAIDs) levels in blood of vultures from Bulgaria. Blood samples of European griffons (Gyps fulvus) (N=33) and cinereous vultures (Aegypius monachus) (N=45) were taken. The organochlorine compounds in blood samples were analysed by gas chromatography coupled to an electron capture detector. The analysis of heavy metals in blood samples was performed by atomic absorbance spectroscopy. The analysis of antibiotics and antiinflammatory drugs were performed in blood samples by liquid chromatography coupled to a time-of-flight mass spectrometer. Organochlorine compounds were present in blood samples at very low levels. Antibiotics and NSAIDs were not detected in none of the analysed blood samples. Cadmium levels in blood were low. Lead levels were elevated in some individuals, although these levels were below those compatible with clinical poisoning in birds. It is remarkable that griffon vultures showed markedly higher levels or organochlorine compounds and lead in blood than the cinereous vultures. It must be also highlighted the absence of antibiotics and the relatively low exposure to lead compared with other monitoring studies performed in Spanish vultures.

Published
2020

39. The Longest Food Deprivation Period of a Griffon Vulture (Gyps fulvus) Recorded in the Wild and Exceptionally Long Nest Attendance.

Author

Arkumarev, Volen S., Kret, Elzbieta J., Stamenov, Anton A., Skartsi, Theodora A., and Dobrev, Dobromir D.

Subjects
VULTURES, PHYSIOLOGICAL adaptation, ECOSYSTEM services, MALES, ATTENDANCE
Abstract

The Eurasian Griffon Vulture (Gyps fulvus) is an obligate scavenger that feeds on large carcasses and provides critical ecosystem services. Vultures evolved various ecological and physiological adaptations to cope with the unpredictability of the food resources and withstand long starvation periods. However, there is a lack of empirical data from wild individuals. Here we describe a case of a male Griffon Vulture tagged with GSM/GPS-ACC transmitter, which withstood without food for over 36 consecutive days. It is the longest food deprivation period recorded for the species in the wild. This unusual behavior occurred during the incubation period. The loss of the female and the strong parental instinct forced the male to continue with the incubation of the egg and attend the nest for 31 consecutive days. [ABSTRACT FROM AUTHOR]

Published
2021

40. Spatial and Temporal Variability in Migration of a Soaring Raptor Across Three Continents

Author

Phipps, W. Louis, primary, López-López, Pascual, additional, Buechley, Evan R., additional, Oppel, Steffen, additional, Álvarez, Ernesto, additional, Arkumarev, Volen, additional, Bekmansurov, Rinur, additional, Berger-Tal, Oded, additional, Bermejo, Ana, additional, Bounas, Anastasios, additional, Alanís, Isidoro Carbonell, additional, de la Puente, Javier, additional, Dobrev, Vladimir, additional, Duriez, Olivier, additional, Efrat, Ron, additional, Fréchet, Guillaume, additional, García, Javier, additional, Galán, Manuel, additional, García-Ripollés, Clara, additional, Gil, Alberto, additional, Iglesias-Lebrija, Juan José, additional, Jambas, José, additional, Karyakin, Igor V., additional, Kobierzycki, Erick, additional, Kret, Elzbieta, additional, Loercher, Franziska, additional, Monteiro, Antonio, additional, Morant Etxebarria, Jon, additional, Nikolov, Stoyan C., additional, Pereira, José, additional, Peške, Lubomír, additional, Ponchon, Cecile, additional, Realinho, Eduardo, additional, Saravia, Victoria, additional, Sekercioğlu, Cağan H., additional, Skartsi, Theodora, additional, Tavares, José, additional, Teodósio, Joaquim, additional, Urios, Vicente, additional, and Vallverdú, Núria, additional

Published
2019
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41. Spatial and Temporal Variability in Migration of a Soaring Raptor Across Three Continents

Author

Universidad de Alicante. Departamento de Ciencias Ambientales y Recursos Naturales, Phipps, W. Louis, López-López, Pascual, Buechley, Evan R., Oppel, Steffen, Álvarez, Ernesto, Arkumarev, Volen, Bekmansurov, Rinur, Berger-Tal, Oded, Bermejo, Ana, Bounas, Anastasios, Carbonell Alanís, Isidoro, Puente, Javier de la, Dobrev, Vladimir, Duriez, Olivier, Efrat, Ron, Fréchet, Guillaume, García, Javier, Galán, Manuel, García Ripollés, Clara, Gil, Alberto, Iglesias-Lebrija, Juan José, Jambas, José, Karyakin, Igor V., Kobierzycki, Erick, Kret, Elzbieta, Loercher, Franziska, Monteiro, Antonio, Morant, Jon, Nikolov, Stoyan C., Pereira, José, Peške, Lubomír, Ponchon, Cecile, Realinho, Eduardo, Saravia, Victoria, Sekercioğlu, Cağan H., Skartsi, Theodora, Tavares, José, Teodósio, Joaquim, Urios, Vicente, Vallverdú, Núria, Universidad de Alicante. Departamento de Ciencias Ambientales y Recursos Naturales, Phipps, W. Louis, López-López, Pascual, Buechley, Evan R., Oppel, Steffen, Álvarez, Ernesto, Arkumarev, Volen, Bekmansurov, Rinur, Berger-Tal, Oded, Bermejo, Ana, Bounas, Anastasios, Carbonell Alanís, Isidoro, Puente, Javier de la, Dobrev, Vladimir, Duriez, Olivier, Efrat, Ron, Fréchet, Guillaume, García, Javier, Galán, Manuel, García Ripollés, Clara, Gil, Alberto, Iglesias-Lebrija, Juan José, Jambas, José, Karyakin, Igor V., Kobierzycki, Erick, Kret, Elzbieta, Loercher, Franziska, Monteiro, Antonio, Morant, Jon, Nikolov, Stoyan C., Pereira, José, Peške, Lubomír, Ponchon, Cecile, Realinho, Eduardo, Saravia, Victoria, Sekercioğlu, Cağan H., Skartsi, Theodora, Tavares, José, Teodósio, Joaquim, Urios, Vicente, and Vallverdú, Núria

Abstract

Disentangling individual- and population-level variation in migratory movements is necessary for understanding migration at the species level. However, very few studies have analyzed these patterns across large portions of species' distributions. We compiled a large telemetry dataset on the globally endangered Egyptian Vulture Neophron percnopterus (94 individuals, 188 completed migratory journeys), tracked across ~70% of the species' global range, to analyze spatial and temporal variability of migratory movements within and among individuals and populations. We found high migratory connectivity at large spatial scales (i.e., different subpopulations showed little overlap in wintering areas), but very diffuse migratory connectivity within subpopulations, with wintering ranges up to 4,000 km apart for birds breeding in the same region and each subpopulation visiting up to 28 countries (44 in total). Additionally, Egyptian Vultures exhibited a high level of variability at the subpopulation level and flexibility at the individual level in basic migration parameters. Subpopulations differed significantly in travel distance and straightness of migratory movements, while differences in migration speed and duration differed as much between seasons and among individuals within subpopulations as between subpopulations. The total distances of the migrations completed by individuals from the Balkans and Caucasus were up to twice as long and less direct than those in Western Europe, and consequently were longer in duration, despite faster migration speeds. These differences appear to be largely attributable to more numerous and wider geographic barriers (water bodies) along the eastern flyway. We also found that adult spring migrations to Western Europe and the Balkans were longer and slower than fall migrations. We encourage further research to assess the underlying mechanisms for these differences and the extent to which environmental change could affect Egyptian Vulture move

Published
2019

42. Spatial and temporal variability in migration of a soaring raptor across three continents

Author

Şekercioğlu, Çağan Hakkı, Phipps, W. Louis; Lopez-Lopez, Pascual; Buechley, Evan R.; Oppel, Steffen; Alvarez, Ernesto; Arkumarev, Volen; Bekmansurov, Rinur; Berger-Tal, Oded; Bermejo, Ana; Bounas, Anastasios; Carbonell Alanis, Isidoro; de la Puente, Javier; Dobrev, Vladimir; Duriez, Olivier; Efrat, Ron; Frechet, Guillaume; Garcia, Javier; Galan, Manuel; Garcia-Ripolles, Clara; Gil, Alberto; Jose Iglesias-Lebrija, Juan; Jambas, Jose; Karyakin, Igor V.; Kobierzycki, Erick; Kret, Elzbieta; Loercher, Franziska; Monteiro, Antonio; Morant Etxebarria, Jon; Nikolov, Stoyan C.; Pereira, Jose; Peske, Lubomir; Ponchon, Cecile; Realinho, Eduardo; Saravia, Victoria; Skartsi, Theodora; Tavares, Jose; Teodosio, Joaquim; Urios, Vicente; Vallverdu, Nuria, College of Sciences, Department of Molecular Biology and Genetics, Şekercioğlu, Çağan Hakkı, Phipps, W. Louis; Lopez-Lopez, Pascual; Buechley, Evan R.; Oppel, Steffen; Alvarez, Ernesto; Arkumarev, Volen; Bekmansurov, Rinur; Berger-Tal, Oded; Bermejo, Ana; Bounas, Anastasios; Carbonell Alanis, Isidoro; de la Puente, Javier; Dobrev, Vladimir; Duriez, Olivier; Efrat, Ron; Frechet, Guillaume; Garcia, Javier; Galan, Manuel; Garcia-Ripolles, Clara; Gil, Alberto; Jose Iglesias-Lebrija, Juan; Jambas, Jose; Karyakin, Igor V.; Kobierzycki, Erick; Kret, Elzbieta; Loercher, Franziska; Monteiro, Antonio; Morant Etxebarria, Jon; Nikolov, Stoyan C.; Pereira, Jose; Peske, Lubomir; Ponchon, Cecile; Realinho, Eduardo; Saravia, Victoria; Skartsi, Theodora; Tavares, Jose; Teodosio, Joaquim; Urios, Vicente; Vallverdu, Nuria, College of Sciences, and Department of Molecular Biology and Genetics

Abstract

Disentangling individual- and population-level variation in migratory movements is necessary for understanding migration at the species level. However, very few studies have analyzed these patterns across large portions of species' distributions. We compiled a large telemetry dataset on the globally endangered egyptian vulture neophron percnopterus (94 individuals, 188 completed migratory journeys), tracked across similar to 70% of the species' global range, to analyze spatial and temporal variability of migratory movements within and among individuals and populations. We found high migratory connectivity at large spatial scales (i.e., different subpopulations showed little overlap in wintering areas), but very diffuse migratory connectivity within subpopulations, with wintering ranges up to 4,000 km apart for birds breeding in the same region and each subpopulation visiting up to 28 countries (44 in total). Additionally, egyptian vultures exhibited a high level of variability at the subpopulation level and flexibility at the individual level in basic migration parameters. Subpopulations differed significantly in travel distance and straightness of migratory movements, while differences in migration speed and duration differed as much between seasons and among individuals within subpopulations as between subpopulations. The total distances of the migrations completed by individuals from the balkans and caucasus were up to twice as long and less direct than those in western europe, and consequently were longer in duration, despite faster migration speeds. These differences appear to be largely attributable to more numerous and wider geographic barriers (water bodies) along the eastern flyway. We also found that adult spring migrations to Western europe and the balkans were longer and slower than fall migrations. We encourage further research to assess the underlying mechanisms for these differences and the extent to which environmental change could affect egyptian vu, Horizon 2020; European Union (European Union); LIFE+ projects; Basque Government; AG Leventis Foundation; MAVA; National Science Foundation (NSF); Christensen Fund; National Geographic Society; Whitley Fund for Nature; State Nature Reserve Dagestanskiy; Russian Raptor Research and Conservation Network; DREAL Nouvelle-Aquitaine-Fondation d'entreprises Barjane; GREFA (Grupo para la Rehabilitacion de la Fauna Autoctona y su habitat)-Endangered Species Monitoring Project; Poison Sentinels Project of WWF/Spain; La Rioja Regional Government in La Rioja; Fundacion Hazi and Diputacion Foral de Gipuzkoa within the Interreg POCTEFA-ECOGYP project in Gipuzkoa; Faruk Yalcin Zoo

Published
2019

43. Methodology and role of the supplementary feeding stations in Bulgaria.

Author

Dobrev, Dobromir, Stamenov, Anton, Arkumarev, Volen, Angelov, Ivaylo, Delchev, Atanas, Dobrev, Vladimir, Hristov, Hristo, and Demerdzhiev, Dimitar

Abstract

The article examines the role and methodology of supplementary feeding stations (SFS) in Bulgaria for vulture conservation, highlighting their impact on breeding success, survival rates, and the mitigation of poisoning risks.

Published
2022

44. Status and threats for the Egyptian Vulture in Albania.

Author

Topi, Mirjan, Dobrev, Vladimir, Hallmann, Ben, Dobrev, Dobromir, Arkumarev, Volen, Saravia-Mullin, Victoria, Bounas, Anastasios, Pappaionnou, Haritakis, Bino, Taulant, Duro, Klea, Xherri, Xhemal, Vorpsi, Zydjon, Selgjekaj, Ledi, Xeka, Erald, Sevo, Besjana, Loce, Ervis, Saliaj, Oresta, Ziu, Denada, Oppel, Steffen, and Popgeorgiev, Georgi S.

Abstract

The article evaluates the status and threats to the Egyptian Vulture in Albania, detailing population trends and conservation challenges. Topics discussed include the decline in breeding pairs and territories, the impact of power lines and poisoning, and recommendations for continued monitoring and a National Species Action Plan.

Published
2022

45. Individually Marked Eurasian Griffon Vulture (Gyps fulvus) Occurrence Phenology in the Eastern Rhodopes, Bulgaria.

Author

Dobrev, Dobromir D., Delchev, Atanas G., Stamenov, Anton A., and Arkumarev, Volen S.

Subjects
VULTURES, PHENOLOGY, BIRDS of prey, TELEMETRY, ECOLOGY
Abstract

The Eurasian Griffon Vulture is a large raptor species with a vast range. The species is breeding in Bulgaria and its population is estimated at more than 100 pairs distributed in several sites in the country nowadays. The aim of the current study was to track the resighting frequency, age and phenology of presence of marked Griffon Vultures in the Eastern Rhodopes, Bulgaria and possibly to record the origin of the tagged individuals. During the study (n=10 years) we recorded 1888 observations of 231 marked Griffon Vultures in total. The number of vulture resightings was 42 ± 8.4 marked individuals per year. The age of 80% of the recorded Griffon Vultures was established. Adult vultures had the highest resighting rate (0.35 ± 0.03). Most of the observed marked Griffon Vultures were recorded during the autumn season, especially the immature birds. The largest portion (n = 1343 resightings) were of Griffon Vultures marked in different parts of Bulgaria. Our results can be easily complemented with GPS telemetry data to reveal entirely movement ecology of Griffon Vulture in the Eastern Rhodopes. [ABSTRACT FROM AUTHOR]

Published
2020

46. Occurences of the Cinereous Vulture (Aegypius monachus) in the Eastern Rhodopes, Bulgaria.

Author

Arkumarev, Volen S., Dobrev, Dobromir D., Stamenov, Anton A., Angelova, Vanya A., Delchev, Atanas G., Dyulgerska, Vera A., Zakkak, Sylvia, Kapsalis, Eleftherios, and Stoychev, Stoycho A.

Subjects
VULTURES, WILDLIFE conservation, PROTECTED areas, FORAGE
Abstract

The Cinereous Vulture (Aegypius monachus) is the largest vulture species in Europe. It is currently extinct in Bulgaria, but individuals from the only Balkan population of the species located in northern Greece frequently forage in the Bulgarian side of the Eastern Rhodope Mountains. We studied the patterns of occurrences, numbers and age structure of Cinereous Vultures in the Eastern Rhodopes, Bulgaria. During 2016 - 2019 we recorded 215 Cinereous Vulture occurrences. The majority of the observed individuals (72.7%) were immature while adults totaled 23.7%. The highest number of vultures were recorded in spring and summer. Cinereous Vultures visited local supplementary feeding stations singularly or in groups of up to eight individuals. Our study shows that Eastern Rhodopes and specifically SPAs 'Studen kladenets', 'Byala reka' and 'Krumovitsa' are important foraging areas and hence high priority conservation areas for the species in Bulgaria. [ABSTRACT FROM AUTHOR]

Published
2020

47. Thoracic X-Strap Harness. Design and Method 3.

Author

Arkumarev, Volen

Subjects
*ENDANGERED species
Abstract

The article offers information on design and method has been used to attach tags to Egyptian Vultures, Eurasian Griffon Vultures Gyps fulvus, Imperial Eagles Aquila heliaca and White-tailed Eagles in Bulgaria and Greece.

Published
2020
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49. Identifying critical migratory bottlenecks and high‐use areas for an endangered migratory soaring bird across three continents

Author

Buechley, Evan R., primary, Oppel, Steffen, additional, Beatty, William S., additional, Nikolov, Stoyan C., additional, Dobrev, Vladimir, additional, Arkumarev, Volen, additional, Saravia, Victoria, additional, Bougain, Clementine, additional, Bounas, Anastasios, additional, Kret, Elzbieta, additional, Skartsi, Theodora, additional, Aktay, Lale, additional, Aghababyan, Karen, additional, Frehner, Ethan, additional, and Şekercioğlu, Çağan H., additional

Published
2018
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50. Long-term lead intoxication of Griffon Vulture (Gyps fulvusHablizl, 1783) supposedly the result of illegal shooting

Author

Stamenov, Anton, Lazarova, Ivanka, Arkumarev, Volen, Dimitrova, Stefka, Terziev, Nikolay, Delchev, Atanas, and Dobrev, Dobromir

Abstract

The European Griffon Vulture Gyps fulvusis a large-sized scavenger exploiting carcasses of livestock and wild ungulates and thus having a paramount importance in the natural ecosystems. In this study, we report on an adult Griffon Vulture detected with lead levels in the bones over the threshold. After two years of tracking, the bird died. The corpse’s clinical examination and radiography detected the presence of two embedded lead pellets from a healed gunshot wound in its right wing. Quantitative laboratory analysis of lead in bone and liver samples evidencing subclinical/chronic lead intoxication of the Griffon Vulture could potentially be a result of the long-term exposure to the lead originating from the pellets in its wing.

Published
2021
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