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Multistate models of bigheaded carps in the Illinois River reveal spatial dynamics of invasive species

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Abstract

Knowledge of the spatial distributions and dispersal characteristics of invasive species is necessary for managing the spread of highly mobile species, such as invasive bigheaded carps (Bighead Carp [Hypophthalmichthys nobilis] and Silver Carp [H. molitrix]). Management of invasive bigheaded carps in the Illinois River has focused on using human-made barriers and harvest to limit dispersal towards the Laurentian Great Lakes. Acoustic telemetry data were used to parameterize multistate models to examine the spatial dynamics of bigheaded carps in the Illinois River to (1) evaluate the effects of existing dams on movement, (2) identify how individuals distribute among pools, and (3) gauge the effects of reductions in movement towards the invasion front. Multistate models estimated that movement was generally less likely among upper river pools (Starved Rock, Marseilles, and Dresden Island) than the lower river (La Grange and Peoria) which matched the pattern of gated versus wicket style dams. Simulations using estimated movement probabilities indicated that Bighead Carp accumulate in La Grange Pool while Silver Carp accumulate in Alton Pool. Fewer Bighead Carp reached the upper river compared to Silver Carp during simulations. Reducing upstream movement probabilities (e.g., reduced propagule pressure) by ≥ 75% into any of the upper river pools could reduce upper river abundance with similar results regardless of location. Given bigheaded carp reproduction in the upper Illinois River is presently limited, reduced movement towards the invasion front coupled with removal of individuals reaching these areas could limit potential future dispersal towards the Great Lakes.

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Acknowledgements

This research was funded by the Illinois Department of Natural Resources and the Great Lakes Restoration Initiative. The authors would like to thank R. MacNamara, J. Rivera, J. Seibert, P. Feltrop, J. Abeln, D. Roth, and A. Lubejko for their assistance with collection and QA/QC of telemetry data. Additionally, the authors thank telemetry collaborators at the U.S. Geological Survey, U.S. Army Corp of Engineers, U.S. Fish and Wildlife Service, Western Illinois University, and Missouri Department of Conservation. The findings and conclusions in this article are those of the author(s) and do not necessarily represent the views of the U.S. Fish and Wildlife Service. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Funding

This study was funded by Illinois Department of Natural Resources (CAFWS-93; CAFWS-106D) through the U.S. Fish and Wildlife Service as part of the Great Lakes Restoration Initiative.

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Correspondence to Alison A. Coulter.

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Authors declare no conflict of interest.

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The procedures described in this manuscript were approved by the Southern Illinois University Animal Care and Use Committee protocols numbers 11-010, 14-015, and 14-025.

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Coulter, A.A., Brey, M.K., Lubejko, M. et al. Multistate models of bigheaded carps in the Illinois River reveal spatial dynamics of invasive species. Biol Invasions 20, 3255–3270 (2018). https://doi.org/10.1007/s10530-018-1772-6

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  • DOI: https://doi.org/10.1007/s10530-018-1772-6

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