Category Archives: Methods

Velocity Measurements in Support of the Drift Study

By Robb Jacobson and Susannah Erwin One of the key components of the Upper Missouri River Pallid Sturgeon Drift Study is the collection of detailed water-velocity information. Water velocities are used to calibrate the advection-dispersion model (see previous blog entry … Continue reading

Posted in Early life history, Methods, Upper Missouri and Yellowstone Rivers |

Night sampling for pallid sturgeon free embryos (The Fish Don’t Sleep and Neither Do We)

By Robb Jacobson and Aaron DeLonay The sample design for the Upper Missouri River Pallid Sturgeon Drift Experiment depends on nearly around-the-clock sampling for free-embryos, the life stage from hatch to the initiation of feeding.  It can be a grueling process … Continue reading

Posted in Early life history, Methods, Upper Missouri and Yellowstone Rivers |

Missouri River Dye Trace Experiment to Support Understanding of Free Embryo Drift

By Robb Jacobson, June 27, 2016 Missouri River scientists started the first phase of the pallid sturgeon free embryo drift study by employing a standard method to understand how hydraulic processes vary the rate of downstream transport of dissolved constituents … Continue reading

Posted in Methods, Upper Missouri and Yellowstone Rivers |

Habitat surveys of 2015 pallid sturgeon spawning patches on the Yellowstone River

By Carrie Elliott, Robb Jacobson, and Casey Hickcox During the last two weeks of June, USGS habitat crews surveyed the pallid sturgeon spawning reach of the Lower Yellowstone River near Fairview, North Dakota.  Using a compact multibeam sonar echosounder system … Continue reading

Posted in Habitat mapping, Methods, Pallid sturgeon, Reproductive Female, Spawning, Telemetry tracking, Upper Missouri and Yellowstone Rivers | Tagged , , |

It’s hard enough to catch a pallid sturgeon once, but twice?!

  Any fisherman will tell you that just knowing where a fish is located is not enough to catch it.  If it were, we would call it “catching” instead of “fishing.”   Recapturing telemetry tagged pallid sturgeon takes skill, experience, hard work, … Continue reading

Posted in Methods, Recapture |