Fish

Humpback chub in the Grand Canyon have flourished under long-running restoration efforts. But now, exotic fish that prey on chub and other native fish have begun to slip through Glen Canyon Dam. It’s an unprecedented problem caused by the drought-stricken low levels of Lake Powell. KNAU’s Melissa Sevigny spoke with National Park Service fisheries biologist Melissa Trammell about her concerns.

The U.S. Fish and Wildlife Service ruled that a Colorado River fish called the roundtail chub will not receive protection under the Endangered Species Act. KNAU’s Melissa Sevigny reports, its status as a species has been debated for years.

The US Fish and Wildlife Service has downlisted a Colorado River fish from endangered to threatened. KNAU’s Melissa Sevigny reports, the agency says the…

The U.S. Fish and Wildlife Service proposed today to downgrade a Colorado River fish, the razorback sucker, from “endangered” to “threatened.” KNAU’s…

Here’s a fish story for you: what if you could get paid to go fishing all day? The National Park Service wants anglers to help get rid of exotic brown…

Endangered fish in the Colorado River face multiple threats. Their survival is linked to the river’s temperature, which is altered both by climate change…

Lees Ferry on the Colorado River below Glen Canyon Dam is a world-famous rainbow trout fishery. But in recent years a different nonnative fish, the brown…

State officials are warning about elevated mercury levels in a species of fish at a Williams-area lake.The Arizona Department of Environmental Quality…

Forensic scientists (at least on TV shows) collect DNA to figure out who was at the scene of a crime. What if you could use the same technique to discover…

Low, steady releases of water from Glen Canyon Dam are taking place this spring and summer as an experiment to increase aquatic insects on the Colorado…