Author Archives: Casey Hickcox

River of sand

By Carrie Elliott Pallid sturgeon are benthic fish, which means they live near the bottom of the river.  We know from hydroacoustic mapping that the bottom of the Missouri River is mostly made of sand, and that in much of … Continue reading

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Transitioning from One Life Stage to the Next

2016 Pallid Sturgeon Free Embryo Drift Study Continues and is Far from Completion By Pat Braaten July 20, 2016 The release of nearly 700,000 pallid sturgeon free embryos on June 27 (see previous blog entry 700,000 Baby Fish) marked the start … Continue reading

Posted in Early life history, Pallid sturgeon, Upper Missouri and Yellowstone Rivers | Tagged , , , , |

Lake Sakakawea Delta and Headwaters

By Robert Jacobson On July 5, the USGS acoustic Doppler current profiler crews worked from just south of Williston, North Dakota, downstream to the headwaters of Lake Sakakawea. The objective of this part of the study was to characterize velocities … Continue reading

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Sturgeon biology and plumbing

By Robert Jacobson, Aaron DeLonay, Kimberly Chojnacki, and Casey Hickcox This spring, Columbia Environmental Research Center (CERC) scientists are conducting laboratory experiments to better understand how temperature affects early development of sturgeon species.  The emphasis is on quantifying development rates … Continue reading

Posted in Early life history, Pallid sturgeon, Reproductive Female, Spawning, Sturgeon culture and propagation, Technology | Tagged , , |

Experiments on Early Sturgeon Development

By Robert Jacobson, Aaron DeLonay, Kimberly Chojnacki, and Casey Hickcox Pallid sturgeon (Scaphirhynchus albus), like most fish, are cold-blooded.  This means that their metabolism is regulated by the temperature of the water in which they live.  As water warms, developmental … Continue reading

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New Pallid Sturgeon Reports

By Robert Jacobson Our blog has been quiet lately because we have been concentrating on writing and reporting. It has been said that if scientific information isn’t published, it’s as if it doesn’t exist. On rivers like the Missouri, where … Continue reading

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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 , , |

Characterizing Spawning Habitat Substrate on the Lower Yellowstone River

By Eric Allen, Ed Bulliner, Carrie Elliott, Robert Jacobson Many sturgeon species spawn over coarse, hard substrate, and Missouri River scientists have thought that this was probably the case for the endangered pallid sturgeon (Scaphirhynchus albus).  Characterizing the size, type, … Continue reading

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New shallow water surveying technology deployment at CERC

By Carrie Elliott, Robb Jacobson, Eric Allen, and Casey Hickcox This spring, experiments to observe shovelnose sturgeon spawning behavior have been ongoing in ponds at the Columbia Environmental Research Center. To characterize the depths and velocities in the experimental ponds, … Continue reading

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Stream studies back in action

By Aaron DeLonay, Robert Jacobson, Kim Chojnacki, and Casey Hickcox Final preparations are underway to initiate lake sturgeon laboratory and artificial stream studies at the Columbia Environmental Research Center (CERC).  One 46.5 lb. female and three males have been selected … Continue reading

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