Category Archives: Reproductive Female

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 , , |

Female prerogative

To the casual observer, the movements of PLS11-008 may seem awfully indecisive.  We know she is reproductive; she has black eggs at a stage appropriate for spawning this spring.  But she waited for more than a month in a short reach … Continue reading

Posted in Reproductive Female, Telemetry tracking |

Every which way

We haven’t posted to the blog much recently because USGS and Nebraska Game and Parks (NGPC) crews have been busy, strung out from Missouri to South Dakota trying to keep tabs on wayward sturgeon.  Downstream in the state of Missouri … Continue reading

Posted in Reproductive Female, Telemetry tracking |

How long before she spawns?

Currently, there is no way to predict exactly when and where a reproductive female pallid sturgeon will spawn.  However, there are various ways to estimate a fish’s readiness to spawn. One such way is to determine how near the germinal vesicle (GV), or nucleus, is … Continue reading

Posted in Reproductive Female, Telemetry tracking |