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Tuesday, February 7 • 6:00pm - 9:00pm
Poster Display. Analysis of Age in the Black Crappie (Pomoxis Nigromaculatus) Using Scale Structures

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AUTHORS: Endora K. Roberts, Minnesota State Univeristy, Mankato; Nathan Hodgins, Minnesota Department of Natural Resources

ABSTRACT: Changes to existing fish species are critical to successful management of sport fisheries as introduction of a different top predators occurs. Effects of growth on a naturally reproducing sport fish, Black Crappie (Pomoxis nigromaculatus) was monitored during changes in fisheries management from stocked Walleye (Sander vitreus) as a top predator to stocked Muskellunge (Esox masquinongy) and stocked Walleye as top predators (1999). Black Crappie were collected and measured to the nearest millimeter and scales were aged from Fox Lake in Martin County, Minnesota. Annual sampling of Fox Lake has occurred since 1991. Mean length-at-age and mean age-at-length of Black Crappie were analyzed within and among grouped years from pre and post Muskellunge management (1994-1996 and 2010-2012). Preliminary results indicate possible stunted growth prior to Muskellunge management and increased growth after Muskellunge management. Additionally, older Black Crappie are more common after Muskellunge stocking. Management of a lake with a low abundance top predator may be beneficial to other lower trophic level sport fish including Black Crappie.

Tuesday February 7, 2017 6:00pm - 9:00pm CST
Lancaster Ballroom

Attendees (2)