Category Archives: Recapture

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 |

Recapture Efforts Have Begun

By Hallie Ladd, Kim Chojnacki, and Aaron DeLonay Since 2004, the Comprehensive Sturgeon Research Project (CSRP) has used telemetry tagging and tracking methods to locate individual sturgeon over long time periods and to record data on movements, behavior, and  habitat use.  In … Continue reading

Posted in Recapture, Telemetry tracking |

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

Posted in Recapture, Reproductive Female, River Sweep | Tagged , , |

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 |

Where The Boys Are

For the past several seasons CSRP biologists have intensively and meticulously tracked female pallid sturgeon to their spawning locations.  All this attention on females is because biologists can easily tell when a female spawns by the presence or absence of … Continue reading

Posted in Recapture |

Thinking Ahead

With the fall season upon us, Comprehensive Sturgeon Research Project (CSRP) biologists are already beginning to think of next spring’s field season.  During these cooler months, field crews are busy tracking and recapturing pallid sturgeon that they believe will become … Continue reading

Posted in Recapture, 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 , , |

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 |