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Did she or didn’t she?
When the spring spawning migration finally ends and the tagged female is recaptured, all is not over. The question on everyone’s mind is, “Did she spawn, or didn’t she?” Using a portable ultrasound...
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Meet the Ladies of 2012
Female pallid sturgeon PLS11-019 was implanted in spring 2011 in non-reproductive condition, but with “small white eggs.” Over the course of a year, those small eggs matured into large dark grey or...
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Pallid Sturgeon Spawning in the Yellowstone River
Pallid sturgeon in the upper Missouri and Yellowstone rivers can live a long time. Many are older than most of the biologists who study them. Over the years, scientists have become very familiar with...
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Where The Girls Are
October proved to be a busy and successful month for USGS Comprehensive Sturgeon Research Project biologists as four reproductive female pallid sturgeon were targeted and recaptured between river miles...
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Sometimes The Missouri River Is A Lonely Place
In late February and March the Missouri River is a lonely place. Comprehensive Sturgeon Research Project boats from the USGS and the Nebraska Game and Parks Commission search the cold, still waters...
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The Gang of Eight
While we are far from Washington, DC, we have our own form of the bipartisan Gang of Eight; eight reproductive pallid sturgeon, fitted with radio telemetry tags, and ready to spawn this spring. Four...
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Are You Ready For Spring?
It may seem a bit early to ask this question, but the spring spawning season is never far from CSRP biologist’s minds (see previous post Thinking Ahead). Preparations for the 2014 spring season...
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July River Sweep
By Kimberly Chojnacki and Aaron DeLonay The researchers of the Comprehensive Sturgeon Research Project (CSRP) have defined a “river sweep” as an attempt to search for telemetered pallid sturgeon in as...
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A Spawning Recorded in the Yellowstone River
By Patrick Braaten Figure 1. Researchers prepare to release pallid sturgeon code 39 following a post-spawn analysis to confirm a successful release of eggs during the spawning event. She was initially...
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Repeating Sturgeon Behaviors
By Hallie Ladd and Aaron DeLonay Scientists in the Comprehensive Sturgeon Research Project have learned from long-term telemetry tracking studies that female pallid sturgeon in the Lower Missouri River...
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Habitat surveys of 2015 pallid sturgeon spawning patches on the Yellowstone...
By Carrie Elliott, Robb Jacobson, and Casey Hickcox Figure 1. USGS research vessel outfitted with a compact multibeam sonar echosounder system with an inertial motion unit and real time kinematic...
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