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Welcome to the interactive web schedule for the 2019 Midwest Fish & Wildlife Conference! The schedule is subject to change (as of November 19, 2018). Please check back for updates. To return to the main Conference website, go to: www.midwestfw.org.

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Monday, January 28 • 1:20pm - 1:40pm
(FISHERIES: RIVERS & STREAMS) Fine-scale Spatial Distribution of Resident Fish Species in Lower-order Tributaries of the Great Lakes

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AUTHORS: Cynthia Nau, Dr. Patrick Forsythe – University of Wisconsin-Green Bay

ABSTRACT: Small, lower-order (1<sup>st</sup>-3<sup>rd</sup>) tributaries of the Great Lakes, including those of Green Bay and Lake Michigan, have been largely understudied relative to the open water and large rivers in the region. Nonetheless, recent research suggests that these aquatic ecosystems may play a vital role as reproductive, nursery and foraging habitat for the highly varied assemblage of fish species resident to the area. Diverse stream geomorphology and anthropogenic influences have resulted in a high degree of variation in stream condition across the watersheds of the region. This large environmental gradient allows for exploration of the ecology of resident fish species in relation to abiotic variability. The primary objective of this study is to quantify the diversity, distribution and habitat selection of resident fishes in intricate detail. This assessment has been carried out on seven Green Bay tributaries and two Lake Michigan tributaries of varying stream condition. Fish and habitat surveys were conducted over a one-kilometer reach, which was further divided into 20-meter sub-reaches using block nets. Preliminary results suggest that the fish community is a unique function of each tributary and that community composition changes as distance from the stream’s mouth increases. The detailed nature of this study will serve to inform restorative management actions, maximizing benefit to individual streams and fish species. Understudied non-game fishes may especially profit from this habitat association knowledge by allowing restoration projects to account for their species-specific requirements. Due to the vast amount of variation found in the Green Bay sub-watershed, these species to habitat relationships may be applicable to tributaries across the Great Lakes region.

Monday January 28, 2019 1:20pm - 1:40pm

Attendees (2)