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Overharvesting
Individuals are removed faster than they can be replaced
Examples› Dodo› Giant ground sloths› Mammoths› American camels
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Overharvesting
American Bison Population once were 60 -75 million
By late 1800s less than 1,000 were left.
Hunted for hides and meat
Currently, about 500,000 wild and commercial bison
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Overharvesting
Passenger Pigeon Was the most abundant bird in N. America.
Population estimates of over 3-5 million birds
Decline due to hunting and forest clearing.
Last one died in 1914.
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Illegal Trade
$5 billion to $20 billion dollars annually.
Animals sold for parts, to be pets or medicinal value.
Example: tarsier and slow loris (pet trade) and rhino (medicinal values)
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Legislation
Lacey Act (1900) Prohibited illegally harvested game animals across state lines.
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Legislation
Convention on International Trade in Endangered Species (CITES)
Control international trade of threatened plants and animals
Agreed upon in 175 countries
Red List – countries must monitor threatened species on the list.
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Other Solutions
Ecotourism visiting relatively undisturbed natural areas, intended as a low-impact and often small scale.
Provides Education, funds for
conservation, economic development of communities and fosters respect for other cultures
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Other Solutions
Community Based Conservation (CBC)
incorporate improvement to the lives of local people while conserving areas through the creation of national parks or wildlife refuges
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CBC Examples
Bird Nest Soup edible bird nest made by birds from their saliva
Harvested 2x/year
Outside of harvesting season groups of men that rotate every 10 days, stay near the cave.
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Clips
Passenger Pigeons Clip Dramatic Tarsier - Video Clip Slow Loris Clip