Loading…
To return to the Midwest Fish & Wildlife Conference website, go to http://www.midwestfw.org/ The following schedule and room names are subject to change (as of February 1, 2017). Please check back for updates. 

Presenters: 
Presenters for technical presentations are either the primary author (the first name listed in the abstract), or are indicated with an asterisk next to their name. 

Please note:
 the conference schedule is hosted by Sched.org which allows you to search within the schedule, and filter the schedule to show sessions only occurring on a certain date or within a track. You can also build your own schedule by creating a free account with Sched.org by selecting "SIGN UP" in the top right corner. 
Wednesday, February 8 • 8:00am - 8:20am
Technical Session. Examination of Pallid Sturgeon Life-history Characteristics Throughout the Missouri River Basin

Sign up or log in to save this to your schedule and see who's attending!

AUTHORS: Martin Hamel, University of Nebraska; Jonathan Spurgeon, University of Nebraska; Kirk Steffensen, Nebraska Game and Parks Commission; Mark Pegg, University of Nebraska

ABSTRACT: Organisms develop life history strategies to maximize fitness, thereby providing the best opportunity to contribute to future generations.  These life history strategies evolve as a result of individual responses (e.g., growth) to the environment or biotic interactions that occur within their realized niche.  We examined pallid sturgeon life history characteristics between isolated sub-populations from the Missouri River basin.  Growth information from mark-recapture data indicated that pallid sturgeon in the lower basin grew quickly at young ages and matured at a smaller size, whereas the opposite occurred in the upper basin.  Predicted ages from mark-recapture indicated that the age distribution was markedly different between areas.  Pallid sturgeon from the lower basin matured around age 7, had a maximum longevity of 30 years, and a mean life expectancy of 18.  Upper basin fish matured later (age-15), had a maximum longevity of 80 years, and a mean life expectancy of 45.  Furthermore, hatchery-reared pallid sturgeon originating from the upper basin and stocked into both the upper and lower basin at age-1 exhibited traits similar to their counterparts within the area they were stocked.  These results have important implications for understanding lifetime reproductive output and highlight important linkages between anthropogenic affects and population dynamics.    

Wednesday February 8, 2017 8:00am - 8:20am
Grand Ballroom D

Attendees (6)