Category Archives: Reproductive Female

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 can spawn as often as every 2 to 3 years and … Continue reading

Posted in Recapture, Reproductive Female, Spawning |

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 , , |

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 much of the Lower Missouri River (from the Gavins … Continue reading

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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 started early in the fall when crews … Continue reading

Posted in Recapture, Reproductive Female |

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 of these individual are currently located … Continue reading

Posted in Reproductive Female, Telemetry tracking |

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 for the telltale chirp of a telemetry transmitter … Continue reading

Posted in Reproductive Female |

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 359 and 599.  Using a portable ultrasound device, scientists were able … Continue reading

Posted in Reproductive Female, Telemetry tracking |

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 the few remaining wild sturgeon. One … Continue reading

Posted in Reproductive Female, Upper Missouri and Yellowstone Rivers |

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 black eggs. In March 2012, she was targeted … Continue reading

Posted in Reproductive Female, Telemetry tracking |

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 unit similar to those used in modern … Continue reading

Posted in Recapture, Reproductive Female, Telemetry tracking | Tagged , , |