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SEAFWA 2018 has ended
The following schedule is from the 72nd Annual Conference of the Southeastern Association of Fish & Wildlife Agencies which was held October 21-24, 2018 in Mobile, Alabama. 
Monday, October 22 • 5:30pm - 7:00pm
Poster: Effects of a Lake Renovation on the Fish Community in Edward Medard Reservoir

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AUTHORS:  Adrian Stanfill, Chris Anderson, and Bill Pouder – Florida Fish and Wildlife Conservation Commission

ABSTRACT:  Edward Medard Reservoir (EMR) is a 770-acre reservoir located in Hillsborough County, Florida. A large-scale dewatering of EMR was conducted in 2009 by the Southwest Florida Water Management District (SWFWMD) to repair an aging dam. Trends in fisheries data prior to dewatering suggested declines in relative abundance/biomass of sportfish and increases in relative abundance/biomass of non-native fishes.  The dewatering event created a unique opportunity, and in collaboration with management partners, we eradicated the fish community while at low pool. Upon refill, we stocked hatchery produced sportfish (Bluegill, Black Crappie) and wild adult Largemouth Bass. Our objectives were to evaluate the influence of the renovation on sportfish and the fish community, respectively, and track the effectiveness of non-native eradication post-renovation. We used boat electrofishing following FWC’s LTM standardized sampling protocol in September-October for most years (2011 – 2015) except in 2009 when sampling occurred in May (before drawdown). When comparing pre (2009) versus post-renovation (2011), substantial changes to the fish community were observed. Decreases in Sailfin Catfish coupled with increases in Shad spp. and Redear Sunfish were the largest contributors to dissimilarity between these years. However, as pre-renovation data were compared to subsequent years (2012, 2013, 2014), the fish community gradually reverts to that observed in 2009 until an increase in Gizzard Shad in 2015. Renovation efforts proved to be successful in suppressing Sailfin Catfish, but Tilapia recovered by 2012. Commercial fishing for Tilapia was opened in 2013 and a shift in size structure of the population towards smaller individuals was observed.

Monday October 22, 2018 5:30pm - 7:00pm
Bon Secour Bay Ballroom & 2nd Level Foyer

Attendees (1)