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37 MILLION YEARS & COUNTING: A SHORT HISTORY OF BEAVERS ~ - - PowerPoint PPT Presentation
37 MILLION YEARS & COUNTING: A SHORT HISTORY OF BEAVERS ~ - - PowerPoint PPT Presentation
37 MILLION YEARS & COUNTING: A SHORT HISTORY OF BEAVERS ~ FRANCES BACKHOUSE ~ Beavers of the Past Castoroides Paleocastor Beavers of Today Castor fiber (Eurasian) Castor canadensis (North American) Castor canadensis - Historic range
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Beavers of the Past
Castoroides Paleocastor
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Beavers of Today
Castor fiber (Eurasian) Castor canadensis (North American)
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Castor canadensis - Historic range (circa 1500)
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First Peoples & Beavers
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North America’s beaver population
Before European contact
Circa 1900
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How did we manage to kill off so many beavers in such a short time?
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The rush for “brown gold”
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Average annual harvest of f beaver pelts lts in in North Am America (b (by y decade) )
From: Furbearer Harvests in North America, 1600-1984 by Novak et al. (Ontario Trappers Association, 1987)
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“As to the ultimate destruction of the beaver no possible question can exist.”
– Horace T. Martin, author of Castorologia (1892)
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Average annual harvest of f beaver pelts lts in in North Am America (by y decade) )
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37 million years of beaver history: What does this mean to us today?
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North America’s landscapes and waterways were ori riginally y engineered by y beavers.
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Eli Eliminating beavers hurt rt ecosystems and species th throughout North Am America.
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What we didn’t kn know, we couldn’t understand.
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Human-beaver conflicts are mostly disp isputes about terr rritorial ownership and use.
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Bea eavers ar are her here for
- r the
the lon
- ng ha
haul, l, so so we e migh ght as as wel ell l lea earn rn ho how to
- get alo
along with the them.
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CO-EXISTENCE
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