The Cranberry Bend Chute on the Missouri River.
Aaron DeLonay
Aaron is an Ecologist at the Columbia Environmental Research Center.
Science and Products
The Cranberry Bend Chute on the Missouri River.
CSRP Biologist Sabrina Davenport holding reproductive feamle pallid sturgeon, PLS11-020.
CSRP Biologist Sabrina Davenport holding reproductive feamle pallid sturgeon, PLS11-020.
Ring-billed gulls line a sand bar along the Missouri River to watch USGS boats fish for sturgeon.
Ring-billed gulls line a sand bar along the Missouri River to watch USGS boats fish for sturgeon.
A wild turkey perches on a rock dike in the Missouri River to get a closer look at USGS boats fishing for sturgeon.
A wild turkey perches on a rock dike in the Missouri River to get a closer look at USGS boats fishing for sturgeon.
CRSP biologists travelled along the Missouri and Mississippi rivers in search of usable boat ramps. Pictured is a ramp located near Cape Girardeau, MO.
CRSP biologists travelled along the Missouri and Mississippi rivers in search of usable boat ramps. Pictured is a ramp located near Cape Girardeau, MO.
CRSP biologists travelled along the Missouri and Mississippi rivers in search of usable boat ramps. Pictured is a ramp Grand Tower, IL.
CRSP biologists travelled along the Missouri and Mississippi rivers in search of usable boat ramps. Pictured is a ramp Grand Tower, IL.
A free-drifting sturgeon embryo was captured in the Lower Missouri River in late August. Most sturgeon in the lower Missouri River spawn in the springtime.
A free-drifting sturgeon embryo was captured in the Lower Missouri River in late August. Most sturgeon in the lower Missouri River spawn in the springtime.
USGS Fishery Biologist, Pat Braaten, and biologists from USGS Columbia Environmental Research Center and the Fort Peck Field Office release a telemetry-tagged, female pallid sturgeon after recapturing her to check her reproductive status. She was still full of ripe, black eggs, and had not yet spawned when she was netted.
USGS Fishery Biologist, Pat Braaten, and biologists from USGS Columbia Environmental Research Center and the Fort Peck Field Office release a telemetry-tagged, female pallid sturgeon after recapturing her to check her reproductive status. She was still full of ripe, black eggs, and had not yet spawned when she was netted.
Biologist, Dave Combs prepares a tracking boat (foreground) and a DIDSON survey boat (background) to search the Yellowstone River for tagged pallid sturgeon, Near Fairview, Montana. Pallid sturgeon in Montana are tagged with radio telemetry transmitters that are detected with large antennas mounted the boats.
Biologist, Dave Combs prepares a tracking boat (foreground) and a DIDSON survey boat (background) to search the Yellowstone River for tagged pallid sturgeon, Near Fairview, Montana. Pallid sturgeon in Montana are tagged with radio telemetry transmitters that are detected with large antennas mounted the boats.
Biologists prepare to perform ultrasound and an egg biopsy on female pallid sturgeon, radio code 30, to determine how close to spawning she is or whether spawning may already have occurred. Biologists from Montana Fish, Wildlife and Parks determined that code 30 eventually spawned in the Yellowstone River on July 19-20, 2012.
Biologists prepare to perform ultrasound and an egg biopsy on female pallid sturgeon, radio code 30, to determine how close to spawning she is or whether spawning may already have occurred. Biologists from Montana Fish, Wildlife and Parks determined that code 30 eventually spawned in the Yellowstone River on July 19-20, 2012.
USGS biologists drift trammel nets on the Yellowstone River, near Fairview, Montana to capture male pallid sturgeon.
USGS biologists drift trammel nets on the Yellowstone River, near Fairview, Montana to capture male pallid sturgeon.
A large male pallid sturgeon captured by the USGS on the Yellowstone River is scanned with a portable ultrasound device to determine if it is “ripe” and ready to reproduce.
A large male pallid sturgeon captured by the USGS on the Yellowstone River is scanned with a portable ultrasound device to determine if it is “ripe” and ready to reproduce.
The sun sets below the horizon as USGS telemetry-tracking crews follow the upstream migration of male pallid sturgeon, code 52, below Intake Diversion Dam, Montana on June 9, 2012.
The sun sets below the horizon as USGS telemetry-tracking crews follow the upstream migration of male pallid sturgeon, code 52, below Intake Diversion Dam, Montana on June 9, 2012.
Following surgery and transmitter implantation, pallid sturgeon PLS11-002 was released at her capture location in the Lower Missouri River.
Following surgery and transmitter implantation, pallid sturgeon PLS11-002 was released at her capture location in the Lower Missouri River.
The sharp scutes along the back of the pallid sturgeon can be seen above the murky water it lives in.
The sharp scutes along the back of the pallid sturgeon can be seen above the murky water it lives in.
An incision just big enough to fit the transmitter is made in the belly of the sturgeon and a few stitches close it up. The stitches eventually dissolve but a small scar remains visible.
An incision just big enough to fit the transmitter is made in the belly of the sturgeon and a few stitches close it up. The stitches eventually dissolve but a small scar remains visible.
Following surgery and transmitter implantation, pallid sturgeon PLS11-002 was released at her capture location in the Lower Missouri River.
Following surgery and transmitter implantation, pallid sturgeon PLS11-002 was released at her capture location in the Lower Missouri River.
USGS scientist retrieves the sampling net from the Missouri River.
USGS scientist retrieves the sampling net from the Missouri River.
USGS scientist records data from the flowmeter measuring the volume of water sampled by the ichthyoplankton sampling net.
USGS scientist records data from the flowmeter measuring the volume of water sampled by the ichthyoplankton sampling net.
Hallie Ladd, Beau Griffith and Jeff Beasley, Five Rivers Services, LLC biologists sorting through larvae samples collected from the Missouri River.
Hallie Ladd, Beau Griffith and Jeff Beasley, Five Rivers Services, LLC biologists sorting through larvae samples collected from the Missouri River.
An ichthyoplankton sampling net being deployed in the Missouri River.
An ichthyoplankton sampling net being deployed in the Missouri River.
Ecological requirements for pallid sturgeon reproduction and recruitment in the Missouri River—Annual report 2014
Ecological requirements for pallid sturgeon reproduction and recruitment in the Missouri River—Annual report 2013
Ecological requirements for pallid sturgeon reproduction and recruitment in the Missouri River—A synthesis of science, 2005 to 2012
Ecological requirements for pallid sturgeon reproduction and recruitment in the Missouri River: annual report 2011
Gonadosomatic index and fecundity of Lower Missouri and Middle Mississippi River endangered pallid sturgeon estimated using minimally invasive techniques
Optimum swimming pathways of fish spawning migrations in rivers
Ecological requirements for pallid sturgeon reproduction and recruitment in the Lower Missouri River: Annual report 2010
Identifying structural elements needed for development of a predictive life-history model for pallid and shovelnose sturgeons
Discrete choice modeling of shovelnose sturgeon habitat selection in the Lower Missouri River
Characterization of environmental cues for initiation of reproductive cycling and spawning in shovelnose sturgeon Scaphirhynchus platorynchus in the Lower Missouri River, USA
Evaluating spawning migration patterns and predicting spawning success of shovelnose sturgeon in the Lower Missouri River
Ecological requirements for pallid sturgeon reproduction and recruitment in the Lower Missouri River: Annual report 2009
Science and Products
The Cranberry Bend Chute on the Missouri River.
The Cranberry Bend Chute on the Missouri River.
CSRP Biologist Sabrina Davenport holding reproductive feamle pallid sturgeon, PLS11-020.
CSRP Biologist Sabrina Davenport holding reproductive feamle pallid sturgeon, PLS11-020.
Ring-billed gulls line a sand bar along the Missouri River to watch USGS boats fish for sturgeon.
Ring-billed gulls line a sand bar along the Missouri River to watch USGS boats fish for sturgeon.
A wild turkey perches on a rock dike in the Missouri River to get a closer look at USGS boats fishing for sturgeon.
A wild turkey perches on a rock dike in the Missouri River to get a closer look at USGS boats fishing for sturgeon.
CRSP biologists travelled along the Missouri and Mississippi rivers in search of usable boat ramps. Pictured is a ramp located near Cape Girardeau, MO.
CRSP biologists travelled along the Missouri and Mississippi rivers in search of usable boat ramps. Pictured is a ramp located near Cape Girardeau, MO.
CRSP biologists travelled along the Missouri and Mississippi rivers in search of usable boat ramps. Pictured is a ramp Grand Tower, IL.
CRSP biologists travelled along the Missouri and Mississippi rivers in search of usable boat ramps. Pictured is a ramp Grand Tower, IL.
A free-drifting sturgeon embryo was captured in the Lower Missouri River in late August. Most sturgeon in the lower Missouri River spawn in the springtime.
A free-drifting sturgeon embryo was captured in the Lower Missouri River in late August. Most sturgeon in the lower Missouri River spawn in the springtime.
USGS Fishery Biologist, Pat Braaten, and biologists from USGS Columbia Environmental Research Center and the Fort Peck Field Office release a telemetry-tagged, female pallid sturgeon after recapturing her to check her reproductive status. She was still full of ripe, black eggs, and had not yet spawned when she was netted.
USGS Fishery Biologist, Pat Braaten, and biologists from USGS Columbia Environmental Research Center and the Fort Peck Field Office release a telemetry-tagged, female pallid sturgeon after recapturing her to check her reproductive status. She was still full of ripe, black eggs, and had not yet spawned when she was netted.
Biologist, Dave Combs prepares a tracking boat (foreground) and a DIDSON survey boat (background) to search the Yellowstone River for tagged pallid sturgeon, Near Fairview, Montana. Pallid sturgeon in Montana are tagged with radio telemetry transmitters that are detected with large antennas mounted the boats.
Biologist, Dave Combs prepares a tracking boat (foreground) and a DIDSON survey boat (background) to search the Yellowstone River for tagged pallid sturgeon, Near Fairview, Montana. Pallid sturgeon in Montana are tagged with radio telemetry transmitters that are detected with large antennas mounted the boats.
Biologists prepare to perform ultrasound and an egg biopsy on female pallid sturgeon, radio code 30, to determine how close to spawning she is or whether spawning may already have occurred. Biologists from Montana Fish, Wildlife and Parks determined that code 30 eventually spawned in the Yellowstone River on July 19-20, 2012.
Biologists prepare to perform ultrasound and an egg biopsy on female pallid sturgeon, radio code 30, to determine how close to spawning she is or whether spawning may already have occurred. Biologists from Montana Fish, Wildlife and Parks determined that code 30 eventually spawned in the Yellowstone River on July 19-20, 2012.
USGS biologists drift trammel nets on the Yellowstone River, near Fairview, Montana to capture male pallid sturgeon.
USGS biologists drift trammel nets on the Yellowstone River, near Fairview, Montana to capture male pallid sturgeon.
A large male pallid sturgeon captured by the USGS on the Yellowstone River is scanned with a portable ultrasound device to determine if it is “ripe” and ready to reproduce.
A large male pallid sturgeon captured by the USGS on the Yellowstone River is scanned with a portable ultrasound device to determine if it is “ripe” and ready to reproduce.
The sun sets below the horizon as USGS telemetry-tracking crews follow the upstream migration of male pallid sturgeon, code 52, below Intake Diversion Dam, Montana on June 9, 2012.
The sun sets below the horizon as USGS telemetry-tracking crews follow the upstream migration of male pallid sturgeon, code 52, below Intake Diversion Dam, Montana on June 9, 2012.
Following surgery and transmitter implantation, pallid sturgeon PLS11-002 was released at her capture location in the Lower Missouri River.
Following surgery and transmitter implantation, pallid sturgeon PLS11-002 was released at her capture location in the Lower Missouri River.
The sharp scutes along the back of the pallid sturgeon can be seen above the murky water it lives in.
The sharp scutes along the back of the pallid sturgeon can be seen above the murky water it lives in.
An incision just big enough to fit the transmitter is made in the belly of the sturgeon and a few stitches close it up. The stitches eventually dissolve but a small scar remains visible.
An incision just big enough to fit the transmitter is made in the belly of the sturgeon and a few stitches close it up. The stitches eventually dissolve but a small scar remains visible.
Following surgery and transmitter implantation, pallid sturgeon PLS11-002 was released at her capture location in the Lower Missouri River.
Following surgery and transmitter implantation, pallid sturgeon PLS11-002 was released at her capture location in the Lower Missouri River.
USGS scientist retrieves the sampling net from the Missouri River.
USGS scientist retrieves the sampling net from the Missouri River.
USGS scientist records data from the flowmeter measuring the volume of water sampled by the ichthyoplankton sampling net.
USGS scientist records data from the flowmeter measuring the volume of water sampled by the ichthyoplankton sampling net.
Hallie Ladd, Beau Griffith and Jeff Beasley, Five Rivers Services, LLC biologists sorting through larvae samples collected from the Missouri River.
Hallie Ladd, Beau Griffith and Jeff Beasley, Five Rivers Services, LLC biologists sorting through larvae samples collected from the Missouri River.
An ichthyoplankton sampling net being deployed in the Missouri River.
An ichthyoplankton sampling net being deployed in the Missouri River.