U.S. Geological Survey (USGS) scientists have extracted DNA from fish eggs found in northern sections of the Upper Mississippi River and have determined that the eggs and larvae are not from Asian carp. Genetic analysis instead shows that the fish … Continued
Scientists have discovered that the rapid spread of hybridization between a native species and an invasive species of trout in the wild is strongly linked to changes in climate. In the study, stream temperature warming over the past several decades … Continued
The eggs of endangered Kootenai River white sturgeon are less likely to hatch on some of the surfaces that have been made more common by human, or anthropogenic, changes on the river, according to a new U.S. Geological Survey report. … Continued
In November, the U.S. Fish and Wildlife Service (USFWS) announced that it does not intend to close any of the nation’s national fish hatcheries in the current fiscal year, but warned that closures may be necessary in FY 2015 given … Continued
Imaging sonar is being used to estimate the population of sockeye salmon in Ozette Lake, located in Washington State. Surveyors are using imaging sonar technology at the lake’s outlet and along its shoreline to quantify the number of adult sockeye … Continued