Mar 14 2009
Fish Protects Water Supply
A number of North American cities are using common bluegills, fish particularly sensitive to chemicals in their environment, to monitor the quality of drinking water. An Associated Press report explains: “The fish are kept in tanks constantly replenished with water from the municipal supply, and sensors work around the clock to register changes in the [...]
Mar 8 2009
Radios in Fish
Hundreds of spawning salmon are being tracked by radio receivers along the Columbia River. They were pulled out of the water and a three-inch-long plastic capsule containing a miniaturized, battery-powered transmitter was put down the throat of each. After being put back into the water they are tracked by radio receivers. Each transmitter gives out [...]