Author Archives: Kimberly Chojnacki

Still Catching Free Embryo Sturgeon

By Alexandra Laboile, Kimberly Chojnacki, and Aaron DeLonay Previous studies by CSRP scientists and others have indicated that the timing and duration of spawning for paddlefish and sturgeon in the Missouri River are dependent upon water temperature.  Each spring for … Continue reading

Posted in Early life history, Spawning | 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 , , |

Yellowstone River Habitat Update

By Carrie Elliott In the Northern Great Plains mid-late June is marked by spectacular thunderstorms, an occasional mosquito swarm, and pallid sturgeon spawning season on the Yellowstone River.  The week of June 16 the U.S. Geological Survey CSRP habitat crew … Continue reading

Posted in Habitat mapping, Upper Missouri and Yellowstone Rivers | Tagged |

Northbound

By Kimberly Chojnacki and Aaron DeLonay In mid-June, 4 USGS research crews from the Lower Missouri River packed up their equipment and headed north to the Upper Missouri and Yellowstone Rivers in Montana (figure 1).  Two boats and crews were … Continue reading

Posted in Upper Missouri and Yellowstone Rivers | Tagged , |

A Change Will Do You Good

By Aaron DeLonay, Amy George, and Kimberly Chojnacki Rows of hatching jars lined the shelves in the laboratory at USGS this spring and summer.  In each jar, pallid sturgeon and shovelnose sturgeon gently tumbled in the 18 °C water as … Continue reading

Posted in Early life history |

An Incredible Journey

By Kimberly Chojnacki and Aaron DeLonay The scientists of the Comprehensive Sturgeon Research Project (CSRP) have known that pallid sturgeon are quite capable of travelling long distances (see previous post “Long Distance Runner”).  Occasionally, we are reminded of the incredible … Continue reading

Posted in Telemetry tracking | Tagged , , |

Pallids in the Platte

By Kimberly Chojnacki, Justin Haas (Nebraska Game and Parks Commission), and Aaron DeLonay Comprehensive Sturgeon Research Project (CSRP) scientists have documented that some tributaries may have significant value to the endangered pallid sturgeon (see previous posts “Where Are You When … Continue reading

Posted in Telemetry tracking | Tagged |

Searching High and Low

By Casey Hickcox and Aaron DeLonay Each spring CSRP biologists evaluate their list of tagged fish and search the river for pallid sturgeon that are expected to spawn.  Because sturgeon do not reproduce every year there can be considerable variation … Continue reading

Posted in Telemetry tracking | Tagged |

We’ve Only Just Begun

After a long, cold winter, the Redbud and Dogwood trees are blooming and water temperatures are rising (Figure 1).  Spring seems to have finally sprung, and fish, and hopefully the endangered pallid sturgeon among them, will soon be spawning.  In … Continue reading

Posted in Early life history | Tagged |

A Kettle of Fish

In the late fall or at the end of winter of previous seasons, Comprehensive Sturgeon Research Project (CSRP) biologists would send boats out into the field to seek out a few, rare pallid sturgeon females to implant with transmitters in … Continue reading

Posted in Telemetry tracking | Tagged |