ENWC201 Lecture Notes - Lecture 8: Trophy Hunting, Overexploitation, Prairie Dog
15 Jun 2018
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Department
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Professor
Overexploitation: living off the land of seas in a manner that can not be
sustained
The hunting, trapping, collecting, and fishing of wildlife at unsustainable
levels
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Biggest threat for marine systems
Second only to habitat loss and destruction for terrestrial birds,
mammals, and plants
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One of the most pressing overexploitation concerns: ivory
Over 40,000 pounds of ivory seized last year
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People are dying over this resource
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Once there is a market for something, this happens
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Temperate terrestrial systems
Hunting in the US
"mostly" well controlled management
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"necessary" in modified environments
Altered vegetation
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Limited disease
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Removed predator species
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Prairie dog hunting is overexploitation in the US
2% of original populations left
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Rattlesnake roundups also overexploitation
They are highly beneficial to ecosystems
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Hunting in other nations
Sometimes well controlled
Cyprus
Capturing and eating songbirds
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Migratory stop for these birds
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Trophy hunting
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Hunting/wildlife trade
Harvested for their parts
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Tropical Terrestrial Systems
40 -> 60% of the world's people
Developing countries
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Most biodiversity
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Timber extraction
Led to roads led to access led to people getting in led to people
harvesting animals
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Timber extraction = access
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The bushmeat trade
Animals harvested in the wild and sold
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No longer sustainable
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Local consumption to regional markets
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Subsistence hunting/bushmeat trade
Defaunation of tropical forests
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Highest levels in southeast asia (522 people per sq kilometer)
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Next cental west africa, next latina america
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More people = more demand
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Subsistence hunting
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Unintended side effects
Some animals responsible for seed dispersal for trees
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Over hunting these animals removes that seed dispersal, stops
these trees from repopulating
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Medicine trade
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Pet trade
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Who is to blame?
The USA is the second largest importer of wildlife products and a
large destination for the illegal pet trade. Every month, many tons
of bushmeat arrives from Africa. During 2001–2005, over 11,000
specimens, i.e. live animals and wildlife products of birds, reptiles,
marine turtles, corals and mammals were seized in shipments from
Costa Rica, Dominican Republic, El Salvador, Guatemala, Honduras
and Nicaragua.
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Marine ecosystems
Well documented
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75% overfished/fully fished
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25% other
"fishing down the food web"
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Atlantic cod
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Factory trawler
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Chinese bahaba
Swim bladder > price of gold
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99% decline in population
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The cove
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Overexploitation
Saturday, April 7, 2018
8:39 AM
Document Summary
Overexploitation: living off the land of seas in a manner that can not be sustained. The hunting, trapping, collecting, and fishing of wildlife at unsustainable levels. Second only to habitat loss and destruction for terrestrial birds, mammals, and plants. One of the most pressing overexploitation concerns: ivory. Over 40,000 pounds of ivory seized last year. Once there is a market for something, this happens. Prairie dog hunting is overexploitation in the us. Led to roads led to access led to people getting in led to people harvesting animals. Highest levels in southeast asia (522 people per sq kilometer) Some animals responsible for seed dispersal for trees. Over hunting these animals removes that seed dispersal, stops these trees from repopulating. The usa is the second largest importer of wildlife products and a large destination for the illegal pet trade. Every month, many tons of bushmeat arrives from africa.
