The Experts below are selected from a list of 41430 Experts worldwide ranked by ideXlab platform
Kimberly L. Barrett - One of the best experts on this subject based on the ideXlab platform.
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Where have all the Falcons gone? Saker Falcon (Falco cherrug) exports in a global economy
Global Ecology and Conservation, 2018Co-Authors: Paul B. Stretesky, Ruth E. Mckie, Michael J. Lynch, Michael A. Long, Kimberly L. BarrettAbstract:Abstract Within conservation biology growing evidence of the decline of the Saker Falcon (Falco cherrug) population has directed attention to the role of the global Falcon trade. Here, we examine factors that may explain the global Saker trade using ecological modernization, treadmill of production and unequal ecological exchange as theoretical frameworks. We estimate trends in Saker exports using the most comprehensive measure available – Convention on International Trade in Endangered Species of Wild Fauna and Flora Trade Database. Our analysis employs fixed effects regression techniques to control for unobserved heterogeneity between nations to isolate the most important drivers of Saker exports. We find that the rise in Saker exports are partly correlated with a nation's increasing income and growing dependence on trade. Such a situation infers that the global Saker Falcon population will continue to diminish if conservation policy does not change and current economic conditions continue.
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Where have all the Falcons gone? Saker Falcon (Falco cherrug) exports in a global economy
Elsevier, 2018Co-Authors: Paul B. Stretesky, Ruth E. Mckie, Michael J. Lynch, Michael A. Long, Kimberly L. BarrettAbstract:Within conservation biology growing evidence of the decline of the Saker Falcon (Falco cherrug) population has directed attention to the role of the global Falcon trade. Here, we examine factors that may explain the global Saker trade using ecological modernization, treadmill of production and unequal ecological exchange as theoretical frameworks. We estimate trends in Saker exports using the most comprehensive measure available – Convention on International Trade in Endangered Species of Wild Fauna and Flora Trade Database. Our analysis employs fixed effects regression techniques to control for unobserved heterogeneity between nations to isolate the most important drivers of Saker exports. We find that the rise in Saker exports are partly correlated with a nation's increasing income and growing dependence on trade. Such a situation infers that the global Saker Falcon population will continue to diminish if conservation policy does not change and current economic conditions continue. Keywords: Avian conservation, Conservation governance, Wildlife trade, Biodiversity, Raptor declin
Andrew Dixon - One of the best experts on this subject based on the ideXlab platform.
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The Use of Power Lines by Breeding Raptors and Corvids in Mongolia: Nest-Site Characteristics and Management Using Artificial Nests
Journal of Raptor Research, 2013Co-Authors: Andrew Dixon, Gankhuyag Purev-ochir, Batbayar Galtbalt, Nyambayar BatbayarAbstract:Abstract The use of power line support structures as nesting sites enables some raptors and corvids to increase their breeding range and/or density in landscapes where alternative nest sites are limited. We report on the use of power poles for nesting by two nest-building species, Common Raven (Corvus corax) and Upland Buzzard (Buteo hemilasius), and two Falcon species, Saker Falcon (Falco cherrug) and Eurasian Kestrel (Falco tinnunculus) in the nest-site-limited steppes of central Mongolia. Various power pole designs differed in their attractiveness to nest-building species, with structures that provided stable support and shelter being significantly favored. Trials of artificial nest barrels to (i) provide alternative nest sites on favored nesting support structures and (ii) provide additional nest sites on unfavored support structures, failed to induce nest-building species to shift their nest location in the first instance or to increase overall breeding density of large raptors and corvids in the sec...
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Peregrine and saker Falcon genome sequences provide insights into evolution of a predatory lifestyle
Nature Genetics, 2013Co-Authors: Xiangjiang Zhan, Andrew Dixon, Shengkai Pan, Margit G. Muller, Yuan Liu, Junyi Wang, Haolong HouAbstract:As top predators, Falcons possess unique morphological, physiological and behavioral adaptations that allow them to be successful hunters: for example, the peregrine is renowned as the world's fastest animal. To examine the evolutionary basis of predatory adaptations, we sequenced the genomes of both the peregrine (Falco peregrinus) and saker Falcon (Falco cherrug), and we present parallel, genome-wide evidence for evolutionary innovation and selection for a predatory lifestyle. The genomes, assembled using Illumina deep sequencing with greater than 100-fold coverage, are both approximately 1.2 Gb in length, with transcriptome-assisted prediction of approximately 16,200 genes for both species. Analysis of 8,424 orthologs in both Falcons, chicken, zebra finch and turkey identified consistent evidence for genome-wide rapid evolution in these raptors. SNP-based inference showed contrasting recent demographic trajectories for the two Falcons, and gene-based analysis highlighted Falcon-specific evolutionary novelties for beak development and olfaction and specifically for homeostasis-related genes in the arid environment–adapted saker.
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Developing A Sustainable Harvest of Saker Falcons (Falco cherrug ) for Falconry in Mongolia.
Gyrfalcons and Ptarmigan in a Changing World, 2011Co-Authors: Andrew DixonAbstract:—Arabian Falconry creates a significant demand for Falcons that is met through captive-breeding and wild-take. In relation to wild-take, the convention on International trade in Endangered species (cItEs) currently only allows the international trade of one important Falconry species, the saker Falcon (Falco cherrug), and this trade is effectively limited to one source country, Mongolia. Market demand for wild-sourced saker Falcons is greater than can be supplied by Mongolia alone; consequently there is also an illegal, unregulated trade in this species along with the GyrFalcon (Falcon rusticolus) and Peregrine Falcon (F. peregrinus). the vast majority of these Falcons are sourced from Asian countries. We describe recent advances in the development of a program in Mongolia that uses artificial nests to create a demonstrably sustainable harvest of saker Falcons for the Arabian Falcon trade. the development of a credible sustainable harvest requires a sound biological basis, a transparent system of monitoring, recording and reporting together with a strong regulatory framework. the potential conservation benefits of such a system, together with the potential for developing legal, sustainable harvests in other countries for different Falcon species, are discussed. Received 9 March 2011, accepted 7 June 2011. DIxon, A., n. bAtbAyAr, G. PurEv-ochIr, AnD n. Fox. 2011. Developing a sustainable harvest of saker Falcons (Falco cherrug) for Falconry in Mongolia. In r. t. Watson, t. J. cade, M. Fuller, G. hunt, and E. Potapov (Eds.). GyrFalcons and Ptarmigan in a changing World. the Peregrine Fund, boise, Idaho, usA. http://dx.doi.org/10.4080/gpcw.2011.0315
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Population Status of Breeding Saker Falcons (Falco Cherrug)in Turkey
Avian Biology Research, 2009Co-Authors: Andrew Dixon, Dimitar Ragyov, Zafer Ayas, Mehmet Deli, Dimitar Demerdzhiev, Ivaylo Angelov, Elena Kmetova, Nedko NedyalkovAbstract:The Saker Falcon Falco cherrug breeds in Turkey and also occurs in the country during passage and in winter. Turkey represents the southwestern range limit of the global breeding distribution of th...
J. W. B. Van Der Giessen - One of the best experts on this subject based on the ideXlab platform.
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upper respiratory tract infection caused by cryptosporidium baileyi in three mixed bred Falcons Falco rusticolus Falco cherrug
Avian Diseases, 2008Co-Authors: Y. R. A. Van Zeeland, Nico J. Schoemaker, Marja Kik, J. W. B. Van Der GiessenAbstract:Abstract Three mixed-bred raptors (Falco rusticolus × Falco cherrug) from a German Falcon breeder were presented with a history of respiratory distress. In one bird a laryngeal stridor was noted, and oral examination revealed an epiglottal swelling. In the other two birds, nasal discharge and sneezing were the main clinical symptoms. Nasal flushing samples and biopsies were collected for pathologic, bacteriologic, and parasitologic examination. Results confirmed a cryptosporidial infection. Polymerase chain reaction (PCR) and DNA analysis identified the causative agent to be Cryptosporidium baileyi. No cryptosporidia were detected in fecal samples, indicating the infection was confined to the respiratory system. Analysis of prey animals (pigeons, quail) failed to identify the source of infection. Treatment was initiated with paromomycin in all three birds, whereas in two birds an additional therapy with azithromycin was given. However, no clinical improvement was seen after several weeks of treatment, and...
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Upper Respiratory Tract Infection Caused By Cryptosporidium baileyi In Three Mixed Bred Falcons (Falco rusticolus × Falco cherrug)
Avian diseases, 2008Co-Authors: Y. R. A. Van Zeeland, Nico J. Schoemaker, Marja Kik, J. W. B. Van Der GiessenAbstract:Abstract Three mixed-bred raptors (Falco rusticolus × Falco cherrug) from a German Falcon breeder were presented with a history of respiratory distress. In one bird a laryngeal stridor was noted, and oral examination revealed an epiglottal swelling. In the other two birds, nasal discharge and sneezing were the main clinical symptoms. Nasal flushing samples and biopsies were collected for pathologic, bacteriologic, and parasitologic examination. Results confirmed a cryptosporidial infection. Polymerase chain reaction (PCR) and DNA analysis identified the causative agent to be Cryptosporidium baileyi. No cryptosporidia were detected in fecal samples, indicating the infection was confined to the respiratory system. Analysis of prey animals (pigeons, quail) failed to identify the source of infection. Treatment was initiated with paromomycin in all three birds, whereas in two birds an additional therapy with azithromycin was given. However, no clinical improvement was seen after several weeks of treatment, and...
Paul B. Stretesky - One of the best experts on this subject based on the ideXlab platform.
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Where have all the Falcons gone? Saker Falcon (Falco cherrug) exports in a global economy
Global Ecology and Conservation, 2018Co-Authors: Paul B. Stretesky, Ruth E. Mckie, Michael J. Lynch, Michael A. Long, Kimberly L. BarrettAbstract:Abstract Within conservation biology growing evidence of the decline of the Saker Falcon (Falco cherrug) population has directed attention to the role of the global Falcon trade. Here, we examine factors that may explain the global Saker trade using ecological modernization, treadmill of production and unequal ecological exchange as theoretical frameworks. We estimate trends in Saker exports using the most comprehensive measure available – Convention on International Trade in Endangered Species of Wild Fauna and Flora Trade Database. Our analysis employs fixed effects regression techniques to control for unobserved heterogeneity between nations to isolate the most important drivers of Saker exports. We find that the rise in Saker exports are partly correlated with a nation's increasing income and growing dependence on trade. Such a situation infers that the global Saker Falcon population will continue to diminish if conservation policy does not change and current economic conditions continue.
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Where have all the Falcons gone? Saker Falcon (Falco cherrug) exports in a global economy
Elsevier, 2018Co-Authors: Paul B. Stretesky, Ruth E. Mckie, Michael J. Lynch, Michael A. Long, Kimberly L. BarrettAbstract:Within conservation biology growing evidence of the decline of the Saker Falcon (Falco cherrug) population has directed attention to the role of the global Falcon trade. Here, we examine factors that may explain the global Saker trade using ecological modernization, treadmill of production and unequal ecological exchange as theoretical frameworks. We estimate trends in Saker exports using the most comprehensive measure available – Convention on International Trade in Endangered Species of Wild Fauna and Flora Trade Database. Our analysis employs fixed effects regression techniques to control for unobserved heterogeneity between nations to isolate the most important drivers of Saker exports. We find that the rise in Saker exports are partly correlated with a nation's increasing income and growing dependence on trade. Such a situation infers that the global Saker Falcon population will continue to diminish if conservation policy does not change and current economic conditions continue. Keywords: Avian conservation, Conservation governance, Wildlife trade, Biodiversity, Raptor declin
Ivan Fufachev - One of the best experts on this subject based on the ideXlab platform.
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Status and trends of circumpolar peregrine Falcon and gyrFalcon populations
Ambio, 2020Co-Authors: Alastair Franke, Knud Falk, Kevin Hawkshaw, Skip Ambrose, David L. Anderson, Peter J. Bente, Travis Booms, Kurt K. Burnham, Johan Ekenstedt, Ivan FufachevAbstract:The peregrine Falcon ( Falco peregrinus ) and the gyrFalcon ( Falco rusticolus ) are top avian predators of Arctic ecosystems. Although existing monitoring efforts are well established for both species, collaboration of activities among Arctic scientists actively involved in research of large Falcons in the Nearctic and Palearctic has been poorly coordinated. Here we provide the first overview of Arctic Falcon monitoring sites, present trends for long-term occupancy and productivity, and summarize information describing abundance, distribution, phenology, and health of the two species. We summarize data for 24 Falcon monitoring sites across the Arctic, and identify gaps in coverage for eastern Russia, the Arctic Archipelago of Canada, and East Greenland. Our results indicate that peregrine Falcon and gyrFalcon populations are generally stable, and assuming that these patterns hold beyond the temporal and spatial extents of the monitoring sites, it is reasonable to suggest that breeding populations at broader scales are similarly stable. We have highlighted several challenges that preclude direct comparisons of Focal Ecosystem Components (FEC) attributes among monitoring sites, and we acknowledge that methodological problems cannot be corrected retrospectively, but could be accounted for in future monitoring. Despite these drawbacks, ample opportunity exists to establish a coordinated monitoring program for Arctic-nesting raptor species that supports CBMP goals.
