Études de cas sur la gestion
The Bureau of Rural Sciences, Australia, recently developed a risk assessment model (Bomford, 2003) which has been endorsed by the National Vertebrate Pests Committee and may be used as the basis for future exotic species import applications.To assign an exotic species to a threat category, three risk scores are calculated: the risk that (1) an escaped or released individual would harm people, (2) escaped or released individuals would establish a wild free-living population (3) the species would be a pest if a wild population did establish. These three risk scores are then used to assign the exotic species to one of four threat categories: extreme, serious, moderate or low.
Anas platyrhynchos has been assigned an Extreme threat category for Australia. These animals should not be allowed to enter, nor be kept in any State or Territory. (Special consideration may be given to scientific institutions on a case by case basis.) Any species that has not been assessed previously should be considered to be in the Extreme Threat Category and should be treated accordingly, until a risk assessment is conducted.
Restocking for hunting purpose is a common practice. An estimation of ca. 300 000 hand-reared birds are released annually.
Restocking for hunting purpose is a common practice for more than 40 years (Fog, 1964). An estimation of ca. 500 000 captive-bred birds are released annually.
The mallard was placed on the State of Hawaii's List of Restricted Animals for importation in the 1980's. Eradication of feral mallards has been recommended by the US Fish and Wildlife Service. Since biologists may have trouble distinguishing between Hawaiian ducks, hybrids and mallards, scientists at the University of California at Davis are developing accurate identification techniques (Uyehara et al., 2007).
Restocking for hunting purposes is a common practice (Baratti et al., 2009)
United States (USA)
Adaptive harvest management utilizes population dynamics and monitoring to regulate mallard hunting in order to better manage Anas platyrhynchos populations in the United States (Nichols, 2007; USFWS, 2007.)
Ressources pour la gestion/Liens
3. Fox, T. A. D. 2009. What makes a good alien? Dealing with the problems of non-native wildfowl. British Birds 102: 660-679.
4. IUCN/SSC Invasive Species Specialist Group (ISSG)., 2010. A Compilation of Information Sources for Conservation Managers.
Résumé: This compilation of information sources can be sorted on keywords for example: Baits & Lures, Non Target Species, Eradication, Monitoring, Risk Assessment, Weeds, Herbicides etc. This compilation is at present in Excel format, this will be web-enabled as a searchable database shortly. This version of the database has been developed by the IUCN SSC ISSG as part of an Overseas Territories Environmental Programme funded project XOT603 in partnership with the Cayman Islands Government - Department of Environment. The compilation is a work under progress, the ISSG will manage, maintain and enhance the database with current and newly published information, reports, journal articles etc.
5. Keawcharoen, Julthatip; van Riel, Debby; van Amerongen, Geert; Bestebroer, Theo; Beyer, Walter E.; van Lavieren, Rob; Osterhaus, Albert D. M. E; Fouchier, Ron A. M; Kuiken, Thijs., 2008. Wild ducks as long-distance vectors of highly pathogenic avian influenza virus (H5NI). Emerging Infectious Diseases. 14(4). APR 2008. 600-607.
6. Knight-Jones, Theodore J. D.; Hauser, Ruth; Matthes, Doris; Staerk, Katharina D. C., 2010. Evaluation of effectiveness and efficiency of wild bird surveillance for avian influenza. Veterinary Research (Les Ulis). 41(4). JUL-AUG 2010. Article No.: 50.
Résumé: Available from: [Accessed 26 July 2010]
8. Nichols, James D.; Runge, Michael C.; Johnson, Fred A.; Williams, Byron K., 2007. Adaptive harvest management of North American waterfowl populations: a brief history and future prospects. Journal of Ornithology. 148(Suppl. 2). DEC 2007. S343-S349.
11. Uyehara, Kimberly J.; Engilis, Andrew Jr.; Dugger, Bruce D., 2008. Wetland features that influence occupancy by the endangered Hawaiian Duck. Wilson Journal of Ornithology. 120(2). JUN 2008. 311-319.
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