Science database

KNOWLEDGE BASE

We have gathered decades of scientific research from Great Britain, continental Europe and North America to share with people interested in diving deeper into the world of beavers.

This list of resources is being constantly amended and updated.

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The effects of invasive North American beavers on riparian plant communities in Cape Horn, Chile: Do exotic beavers engineer differently in sub-Antarctic ecosystems?

Published by: Biological Conservation

1st April 2006

Since their introduction to southern South America in 1946, North American beavers have rapidly expanded their populations. This study sought to understand what impact North American beavers had on plant populations in Chile and compare this to their impact in North America. In Chile, beavers significantly reduced forest canopy, altered tree seedling composition, and increased the quantity of plant biomass. So far, similar to at home. However, unlike in North America, their presence enabled invasive plant species to dominate, endangering the balance of the ecosystem.

A GIS-based habitat-suitability model as a tool for the management of beavers Castor fiber

Published by: Acta Theriologica

1st April 2006

This study created a model to identify suitable habitats for beavers in Salzburg, Austria. The existing beaver distribution in the area indicated that the population hadn't reached its full capacity yet. The model identified 13 regions large enough to host colonies and predicted a 72% increase in beaver populations. Management strategies for potential conflicts between beavers and humans are suggested.

Resident beavers (Castor canadensis) do not discriminate between castoreum scent marks from simulated adult and subadult male intruders

Published by: Canadian Journal of Zoology

1st April 2006

This study tested how territorial beavers react to intruders of different ages, by using scent extracts (castoreum) from different beavers. Contrary to expectations, beavers did not respond differently to the size or age of the intruder. This suggests beavers may not be able to tell the age of intruding beavers based on scent alone and may rely on matching the scent to the intruder if ever they meet.

The influence of fall-spawning coho salmon (Oncorhynchus kisutch) on growth and production of juvenile coho salmon rearing in beaver ponds on the Copper River Delta, Alaska

Published by: Canadian Journal of Fisheries and Aquatic Sciences

8th March 2006

This study looked at how the nutrients provided by the dying parent generation of coho salmon affect young coho salmon in Alaska. They compared fish in three types of beaver pond: those downstream of spawning areas, those not affected by spawning salmon, and those not naturally affected but artificially enriched with salmon carcasses and eggs. The extra nutrients boosted growth rates and condition in some ponds but didn't consistently lead to better survival. This suggests that the nutrient cycle between generations is likely to be more complicated than initially thought.

Efficacy of Cartridge Type and Projectile Design in the Harvest of Beaver

Published by: Wildlife Society Bulletin

1st March 2006

In this article, researchers compare the impacts of two types of bullet for shooting beavers. These impacts included the damage to the beavers skin and the amount of meat lost in the process. They also estimated that 98% of the beavers in this study died instantly.

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