Unified Interior Regions

Region 5: Missouri Basin

USGS Science Centers in the Missouri Basin Region

For more information on what each center is doing in the Missouri Basin, please follow the links below!

Wyoming - Montana Water Science Center

Northern Rocky Mountain Science Center

Kansas Water Science Center

Nebraska Water Science Center

Northern Prairie Wildlife Research Center

Dakota Water Science Center

Regions L2 Landing Page Tabs

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February 23, 2016

Culvert trap and bait

Biologists use road-killed ungulates such as deer, elk, or bison as bait in the traps. 

February 23, 2016

At the capture site

At capture sites with road access, biologists drive to a trap with a bear inside to set up for collecting biological data. 

February 23, 2016

An immobilized bear.

Biologists use a syringe pole to immobilize the captured grizzly bear.  It takes approximately 10 minutes for a bear to become immobilized.  

February 23, 2016

Ready to remove from the trap

Biologists have immobilized the bear and prepare to lift it out of the trap and onto the tarp for data collection.  Once on the tarp the bear is easier to move. 

February 23, 2016

Preparing for collection of samples

A biologist prepares to collect biological information from the bear they have captured.  Biologists collect hair samples for genetic analysis, weigh the bear,  and gather numerous measurements of the body, such as the head, paws, claws, teeth, etc.  Overall condition of the bear is assessed as well, including a body fat measurement.

February 23, 2016

Getting the bear's weight

One of the first measurements taken is the bear’s weight using a quadpod and electronic scale. 

February 23, 2016

Getting set up

Biologists are very careful to keep the grizzly bear under shade and protected from the elements while they collect biological data.  Vital signs are monitored throughout the handling period. 

February 23, 2016

Close up

The kerchief over the grizzly bear’s eyes protects it from dust and debris and reduces visual stimulation. The small tubing in its nose, known as a nasal cannula, delivers oxygen to the animal while it is tranquilized.  

February 23, 2016

Assessing body fat percentage of grizzly bear

Field personnel use bioelectrical impedance to assess body fat percentage of captured bears.  The procedure is similar to how body fat is measured in humans and is based on the resistance of body tissues to the flow of a small, harmless electrical signal.  The electrical current is impeded more by fat tissues compared with tissues that are composed mostly of water, thus

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