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Tracking an invasion: how the distribution and abundance of Lionfish (Pterois spp.) has changed along the U.S. Atlantic coast

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Abstract

Central to invasive species management plans or strategies is monitoring of the population on an appropriate scale, including a characterization of some basic components of the invasion, such as changes in distribution and abundance over time. This is true of the invasive Lionfish (Pterois volitans and P. miles) in the Atlantic waters off the southeast coast of the United States, where they have become established, but minimal information regarding region-wide metrics of long-term abundance and distribution exists. By utilizing videos from 2011 to 2021 from a fishery-independent survey, regionwide distribution and abundance trends were characterized with generalized additive models, using spatial, temporal, environmental, microhabitat features, and water property variables to explore their effects on these patterns. The probability of occurrence and relative abundance of Lionfish in the study area increased initially until reaching a peak in 2015–2017 and then declined to the end of the study period (2021). Lionfish distribution and relative abundance followed similar patterns throughout the time series, but there was no extension north or south in the region, indicating abundance levels were driven by the density of Lionfish and not changes in distribution. The same variables were identified in both models, indicating preferred habitat use and/or detectability of Lionfish can be accounted for in continued monitoring efforts and provide information for future mitigation efforts.

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Acknowledgements

We are grateful to the numerous field biologist with the MARMAP, SEAMAP-SA, and SEFIS programs and the vessels crew that collected the data included in this article. The authors would also like to thank reviewers for their comments and constructive criticism to improve this manuscript. Mention of trade names or commerical companies is the identification purposes only and does not imply endorsment by the National Marine Fisheries Service, NOAA. The scientific results and conclusions, as well as any view and opinions expressed herein, are those of the authors and do not necessary reflect those of any government agency. This is contribution number 879 for the Marine Resources Research Institute at South Carolina Department of Natural Resources.

Funding

Funding was provided by South Carolina State Wildlife Grant T-54-R-1 number F10AF00443. Additional funding was provided by NOAA through the MARMAP (NA21NMF4540294) and SEAMAP-SA (NA21NMF4350372) grants to SCDNR.

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Contributions

All authors contributed to the conception and design of the study. Material preparation and data collection and video processing were performed by MF, NB, JB, and WB. MF and JB performed the statistical analyses. MF, JB, and WB wrote sections of the manuscript. All authors contributed to the article and approved the submitted version.

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Correspondence to Margaret W. Finch.

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The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

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The dataset analyzed during the current study is available from the corresponding author on reasonable request.

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Finch, M.W., Ballenger, J.C., Bacheler, N.M. et al. Tracking an invasion: how the distribution and abundance of Lionfish (Pterois spp.) has changed along the U.S. Atlantic coast. Biol Invasions (2024). https://doi.org/10.1007/s10530-024-03248-y

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  • DOI: https://doi.org/10.1007/s10530-024-03248-y

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