Author Archives: Casey Hickcox

The Sounds of Sturgeon Research

By Aaron DeLonay,¬†Kimberly¬†Chojnacki, and Casey Hickcox Recently, Comprehensive Sturgeon Research Project scientists documented a spawning event in the Yellowstone River when researchers followed a reproductive female sturgeon to a location where an aggregation of male sturgeon had been identified (See … Continue reading

Posted in Spawning, Technology, Telemetry tracking, Upper Missouri and Yellowstone Rivers | Tagged , , |

A Spawning Recorded in the Yellowstone River

By Patrick Braaten She was initially captured in September 1993, but at the time, the sex and reproductive status of the 1325 mm, 15.9 kg pallid sturgeon were not determined. She was implanted with a passive integrated transponder (PIT) tag … Continue reading

Posted in Recapture, Reproductive Female, Spawning, Telemetry tracking, Upper Missouri and Yellowstone Rivers | Tagged , , |

Mapping the Chutes

By Robert Jacobson and Casey Hickcox The presence of pallid sturgeon (Scaphirhynchus albus) on the Federal Endangered Species List generally boils down to their inability to reproduce in the wild. Scientists suspect shallow-water habitat lost when the Missouri River was … Continue reading

Posted in chute, Habitat mapping, Technology | Tagged , , , |

It’s more than just gravel and sand!

By Aaron Delonay, Robert Jacobson, and Casey Hickcox Scientists hypothesize that pallid sturgeon (Scaphirhynchus albus), like other sturgeon species, spawn over hard or coarse substrate such as bedrock, cobble or gravel. The type, size, or composition of coarse substrate that … Continue reading

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Unpredictable Water in the Missouri River

By Aaron Delonay, Robert Jacobson, and Casey Hickcox As the temperatures in the Missouri River Basin begin to rise each spring, snowmelt and spring storms typically introduce large quantities of water into the system. This water becomes runoff that enters … Continue reading

Posted in Drought, Flooding, Spawning | Tagged , , , |

We Just Wanna See What Happens Down There!

Pallid sturgeon exist almost exclusively in habitats that are notoriously difficult to study. Particularly due to river flow and turbidity, there are many aspects of sturgeon behavior which scientists struggle to observe and truly understand. One such behavior which Comprehensive … Continue reading

Posted in Habitat mapping, Sturgeon culture and propagation | Tagged , , , , , |

Adult Reproductive Studies Benefit from Broodstock Collection Effort

Each spring biologists and volunteers from State and Federal agencies cooperate to collect adult pallid sturgeon from the Lower Missouri River for hatchery propagation.¬† Offices from the U.S. Fish and Wildlife Service, Missouri Department of Conservation, Nebraska Game and Parks … Continue reading

Posted in Telemetry tracking | Tagged , , |

One Down, Several to Go

On May 7th, the CSRP sampling crew on the Missouri River in Nebraska reported the first free embryo capture of the season. Crews equipped with fine mesh nets have been sampling the Missouri and Platte Rivers for drifting embryos since … Continue reading

Posted in Early life history | Tagged , |