USGS river gage at Hickson, ND along the Red River of the North.
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Red River of the North Gage House
USGS river gage at Hickson, ND along the Red River of the North.
Augustine Volcano Sampling
Students climb out of ravine on north flank of Augustine Volcano during descent from sampling the 2006 lava flow during 2010 summer field campaign.
Students climb out of ravine on north flank of Augustine Volcano during descent from sampling the 2006 lava flow during 2010 summer field campaign.
Drill Rig
This image shows part of a gas drilling rig in Colorado.
This image shows part of a gas drilling rig in Colorado.
Solar Power
This image is of solar panels in Colorado.
Drill Rig
This image shows part of a drill rig in Colorado.
This image shows part of a drill rig in Colorado.
Drill Rig
This image shows part of a gas drilling rig in Colorado.
This image shows part of a gas drilling rig in Colorado.
Measuring Pembina River Streamflow
A bridge board and current meter being used to measure the streamflow on Pembina River at Neche, ND.
A bridge board and current meter being used to measure the streamflow on Pembina River at Neche, ND.
Buoys
Buoys are attached to trotlines deployed in the Lower Missouri River.
Buoys are attached to trotlines deployed in the Lower Missouri River.
Pallidon Nets
Pallid sturgeon caught in the Lower Missouri River.
Pallid sturgeon caught in the Lower Missouri River.
Tracking Equipment
SRX receivers (left) and a ruggedized laptop computer (right) are essential tools for telemetry tracking on the Lower Missouri River.
SRX receivers (left) and a ruggedized laptop computer (right) are essential tools for telemetry tracking on the Lower Missouri River.
Red River
Red River of the North at Halstad, Minnesota, on April 1, 2011, just prior to ice breaking up.
Red River of the North at Halstad, Minnesota, on April 1, 2011, just prior to ice breaking up.
Wood Frog Embryos in an Icy Wetland
Wood frog embryos in a partly ice-covered Wisconsin wetland. Interconnected wetlands and uplands are critical elements of most North American landscapes and support our quality of life in profound ways. To provide much-needed information, the USGS is leading a growing network of U.S.
Wood frog embryos in a partly ice-covered Wisconsin wetland. Interconnected wetlands and uplands are critical elements of most North American landscapes and support our quality of life in profound ways. To provide much-needed information, the USGS is leading a growing network of U.S.
Storm Clouds over Missouri River
Storm clouds over the Missouri River.
Storm clouds over the Missouri River.
Brackish Marsh in the Mississippi River Delta
A brackish marsh in the Mississippi River Delta.
A brackish marsh in the Mississippi River Delta.
A Lichen in Maine
This lichen, Lobaria pulmonaria, is found in northern North America, where it is becoming rare in places. Lichens -- which are often mistaken for moss -- are unusual plant-like organisms that are actually symbioses of fungi, algae and bacteria living together.
This lichen, Lobaria pulmonaria, is found in northern North America, where it is becoming rare in places. Lichens -- which are often mistaken for moss -- are unusual plant-like organisms that are actually symbioses of fungi, algae and bacteria living together.
Larval Sampling
Weighted, small mesh nets (left and right side of the boat attached to winches) are lowered to the bottom of the river near potential spawning sites. After a set period of time, the nets are raised and the contents are hand-picked for any Acipenseriformes (sturgeon and paddlefish) larvae. Samples are preserved for laboratory identification and genetic an
Weighted, small mesh nets (left and right side of the boat attached to winches) are lowered to the bottom of the river near potential spawning sites. After a set period of time, the nets are raised and the contents are hand-picked for any Acipenseriformes (sturgeon and paddlefish) larvae. Samples are preserved for laboratory identification and genetic an
Performing Double Duty
Performing double duties of tracking and collecting acoustic images, Chad Vishy operates one of his three computers and five screens necessary to simultaneously collect this variety of data.
Performing double duties of tracking and collecting acoustic images, Chad Vishy operates one of his three computers and five screens necessary to simultaneously collect this variety of data.
Research Vessel Lowering a Sand Cam
Research vessel Theodore R. Schmudde anchors in the swift water before lowering the sand cam (metal object suspended to the pulleys at the front of the boat).
Research vessel Theodore R. Schmudde anchors in the swift water before lowering the sand cam (metal object suspended to the pulleys at the front of the boat).
Tandem Tracking
Biologists prepare to tandem track a flooded Missouri River in search of telemetered Pallid Sturgeon.
Biologists prepare to tandem track a flooded Missouri River in search of telemetered Pallid Sturgeon.
Canal Dredging
Dredging the entrance canal to the Caloosahatcee River in Moore Haven, FL.
Dredging the entrance canal to the Caloosahatcee River in Moore Haven, FL.
Implanting Telemetry Tag in Pallid Sturgeon
Acoustic telemetry tags have to be fairly small to fit inside a five to fifteen pound pallid sturgeon. The average tag is about the size of your ring finger (60-90 mm long and 16 mm diameter). That means the battery that powers the acoustic tag is small, too. A small battery means that the signal from the tag is relatively weak, or fairly quiet.
Acoustic telemetry tags have to be fairly small to fit inside a five to fifteen pound pallid sturgeon. The average tag is about the size of your ring finger (60-90 mm long and 16 mm diameter). That means the battery that powers the acoustic tag is small, too. A small battery means that the signal from the tag is relatively weak, or fairly quiet.