Management Information
Most Castor canadensis (beaver) management is through various forms of trapping for pelts. Demand for pelts has decreased so now there is little incentive for trappers to hunt beavers. Beaver colonies have been moved to other areas but in most cases other beavers move into the area and replace the beavers that were removed. Similar problems occur with trapping – removing the resident population simply allows other beavers to replace them. Dams in Canada have been blown up but it is a costly process and frequently new dams are created in the same place. Jensen et al (2001) suggest installing oversized culverts as a way of discouraging beaver plugging activity. McKinstry and Anderson (1998) state that Hancock and Bailey traps are typically used for live trapping beavers, but are bulky and expensive, and suggest steel cable snares as an alternative.
Location Specific Management InformationFinland
A special licence for hunting C. canadensis is no longer required in Finland (Nummi, 2006). Tierra del Fuego (Argentina)
The beaver is subject to a control programme by the Chilean government on Tierra del Fuego Island. The Argentinian government permits the hunting of beavers throughout the year. Tierra del Fuego currently has a provincial law which forbird the introduction of exotic species (Di Paola and Kravetz, 1999). Tierra del Fuego (Chile)
The beaver is subject to a control programme by the Chilean government on Tierra del Fuego Island.
Management Resources/Links
1. Di Paola, M.E. and Kravetz, D.G. 1999. Invasive Alien Species: Legal and Institutional Framework in Argentina. Workshop on the legal and institutional dimensions of invasive alien species. IUCN.
Summary: This article outlines the legal framework for invasive alien species in Argentina. 2. Edmonton. 1995. A plague of compulsive dam builders: 1994 was a bumper year in Alberta for bothersome beavers. Western Report. 9: 22-23.
Summary: A report of the effects of Castor canadensis in it's native ranges. 3. Genovesi, P. 2005. Eradications of invasive alien species in Europe: a review. Biological Invasions. 7 (1): 127-133.
Summary: This paper gives details of the eradications of introduced species in Europe, including the eradication of M. vison from Hiimaa Island in Estonia. 4. Jensen, P.G., Curtis, P.D., Lehnert, M.E., and Hamelin, D.L. 2001. Habitat and structural factors influencing beaver interference with highway culverts. Wildlife Society Bulletin. 29 (2): 654-664.
Summary: This article discusses the factors involved in beaver damage to highway culverts, and methods to reduce this damage. 5. McKinstry, M.C., and Anderson, S.H. 1998. Using snares to live-capture beaver, Castor canadensis. Canadian Field-Naturalist. 112 (3): 469-473.
Summary: This article outlines the various methods used for live-trapping of beavers in Wyoming. 6. Nummi, P. 2006. NOBANIS – Invasive Alien Species Fact Sheet – Castor canadensis. – From: Online Database of the North European and Baltic Network on Invasive Alien Species – NOBANIS www.nobanis.org, Date of access 13/02/2008
Summary:
The North European and Baltic Network on Invasive Alien Species (NOBANIS) is a gateway to information on alien and invasive species in North and Central Europe. The participating countries are Denmark, Estonia, Finland, Faroe Islands, Germany, Greenland, Iceland, Latvia, Lithuania, Norway, Poland, European part of Russia, Sweden. The NOBANIS project will provide fact sheets on 60 of the most invasive alien species of the region, covering both animals and plant as well as microorganisms. We intend to upload 60 fact sheets - so please visit this page regularly.
NOBANIS is available from: www.nobanis.org, this page is available from: http://www.nobanis.org/files/factsheets/Castor_canadensis.pdf [Accessed 16 February 2008] 7. Skewes, O., González, F., Rubilar, L. and Quezada, M. 1999. Investigación, aprovechamiento y control castor, islas Tierra del Fuego y Navarino. Instituto Forestal-Universidad de Concepción, Punta Arenas. Results Page: 1
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