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Life Science: Chemical Contamination of Beluga Whales (5:10)
Scientists suspect the belugas of the St. Lawrence River are dying from chemical contamination. These chemicals come from sources such as insecticides and toxins that have been discharged into the water.
Life Science: Beluga Whales (2:36)
Since beluga whales settled into the mouth of the St. Lawrence River some 10,000 years ago, their population has drastically declined. What is happening to the St. Lawrence belugas? What is causing them to die?
Natural Focus: Researching the Sturgeon (2:59)
A wet lab enables scientists to study the early life stages of the biologically unique and endangered shortnose sturgeon.
Natural Focus: Researching the Sturgeon in the Wild (2:31)
The Endangered Species Act of 1973 provides some protection for the shortnose sturgeon, a bottom-feeder that preys other freshwater creatures.
Natural Focus: Introducing the Sturgeon (1:24)
Watch as a crew of biologists studies shortnose sturgeon on the Connecticut River. These amazing fish grow up to four feet in length, and live as long as thirty-five years.
