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Tuesday, January 30 • 6:00pm - 9:00pm
Poster Display. Community Structure and Diet Composition of Fishes Within the Lower Fox River, Green Bay, Wisconsin

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AUTHORS: Spencer Vander Bloemen, Stefan Tucker, Dr. Christopher Houghton, Dr. Patrick Forsythe - University of Wisconsin-Green Bay

ABSTRACT: The Fox River is the largest tributary to Green Bay, Lake Michigan and has undergone decades of environmental degradation that has negatively affected biotic communities. Over the last 10 years, extensive effort has been made to remediate benthic contaminants within the river, with the goal of improving fish and invertebrate communities. While the health of fish has improved throughout the system, trends in fish abundance and distribution in the Lower Fox River, especially non-game fish, remain relatively less understood. To provide a present-day composition of resident fish species and examine patterns in spatial distribution, a small-mesh gill net survey was conducted throughout the Lower Fox River during late summer and early fall 2017. Additionally, diet composition was examined by visual dissection of stomachs. To investigate current forage base for a variety of species and size classes. Results suggest the system is dominated by species such as Walleye (Sander vitreus), Gizzard shad (Dorosoma cepedianum), White perch (Morone americana) and Freshwater drum (Aplodinotus grunniens). Fish diets are variable across species. Walleye, a top predator of the system, had diets dominated by other fish species such as (Yellow Perch, Perca flavescens), whereas, Freshwater drum consumed both fish and aquatic invertebrates. Monitoring fish community dynamics within the Lower Fox River will aid restoration efforts by establishing a framework to evaluate the response of the fish assemblage to restoration efforts.

Tuesday January 30, 2018 6:00pm - 9:00pm CST
Ballroom C & Foyer

Attendees (1)