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Title:Ellipse (Venustaconcha ellipsiformis) and Spike (Eurynia dilatata) Status and Recommendations for the Chicago Wilderness Area
Author(s):Andree, Sara R; Douglass, Sarah A; Stodola, Alison P.
freshwater mussels
Chicago Wilderness
Geographic Coverage:Chicago Wilderness Area, Illinois
Abstract:The goal of this project was to use Bayesian modeling techniques in a Bayesian Decision Network to estimate the best method of reintroduction of Ellipse (Venustaconcha ellipsiformis) and Spike (Eurynia dilatata) to watersheds within the Chicago Wilderness Area (CWA), and assess current population status of each species within the region. A combination of long-term timed search data, targeted mussel density sampling in 2018, cost assessments, and survey data gathered from experts was used to populate models and determine optimal reintroduction strategies for each species in two rivers, the West Branch DuPage River and South Branch Kishwaukee River. An effort was also made to determine the importance of density vs presence data collection when building Bayesian Decision Networks, to inform future sampling needs. Additionally, models were evaluated for sensitivity to input and the impact of expert opinion bias was assessed. Recommendations are presented for each species in our two target watersheds, and future steps needed to facilitate restoration are discussed.
Issue Date:2020-02-17
Publisher:Illinois Natural History Survey
Series/Report:Technical Report INHS 2020 (16)
Genre:Technical Report
Publication Status:unpublished
Peer Reviewed:not peer reviewed
Sponsor:IDNR State Wildlife Initiative Grants Program T-99-R-1
Rights Information:This document is a product of the Illinois Natural History Survey, and has been selected and made available by the Illinois Natural History Survey and the University Library, University of Illinois at Urbana-Champaign. It is intended solely for noncommercial research and educational use, and proper attribution is requested.
Date Available in IDEALS:2020-09-11

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