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Trying to collapse a population for conservation: commercial trade of a marine invasive species by artisanal fishers

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Abstract

Implementing new and effective control strategies to reduce populations of invasive species is needed to offset their negative impacts worldwide. The spread of Indo-Pacific lionfish (Pterois sp.) through much of the western Atlantic has been one of the most publicized marine invasions globally, and is considered a major biodiversity threat whose longer-term impacts are still uncertain. Marine managers have explored several strategies to control lionfish, such as fishing tournaments (derbies) and commercial fisheries. Commercial fisheries for invasive species are controversial because they could create perverse incentives to maintain these populations, and they have never been demonstrated to successfully control target populations. We analyzed the development and impacts of an opportunistic fishing operation aimed at commercializing invasive lionfish in the Mexican Caribbean. We examined official lionfish landings and compared them to catches from lionfish derbies and lionfish densities from locations in the state of Quintana Roo, Mexico. We found that commercial fishers, particularly from one fishing cooperative on Cozumel Island, were effective at catching lionfish, with landings peaking at 20,000 individuals in 2014. This number is comparable to the number of lionfish caught in derbies across the entire Caribbean in the same year. Ecological survey data suggest a ~ 60% reduction in lionfish density on Cozumel reefs over two years (2013–2015), matching the peak landings in the lionfish fishing operation. However, the fishery’s apparent success as a control tool during the time window analyzed seemed to trigger its own demise: a decline in landings was followed by evaporating market interest and loss of economic viability. If fisheries are to be established and used as management strategies to control future invasions, managers must develop strategic collaboration plans with commercial fishing partners.

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Availability of data and materials

We used two sources of data in this paper. The first is qualitative data from interviews, which were firstly reported on internal reports by the non-governmental organization, Comunidad y Biodiversidad A.C. (COBI), and are available upon request to: sfulton@cobi.org.mx. The second is ecological data on the status of the lionfish population in Cozumel, and lionfish fisheries landings reported by commercial fishers to the Mexican Fisheries Ministry (CONAPESCA). These two datasets are available for download at https://doi.org/10.6084/m9.figshare.13208102.v1.

Code availability

R scripts for statistical analyses made are available for download at https://doi.org/10.6084/m9.figshare.13208102.v1.

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Acknowledgements

We greatly acknowledge the fishing cooperatives of Quintana Roo, particularly the Cozumel Cooperative (Sociedad Cooperativa de Producción Pesquera Cozumel), for their leadership in lionfish control efforts; CONANP, particularly the Cozumel Reefs National Parks Office for their support and regional leadership to control lionfish.

Funding

L. Malpica-Cruz was supported during fieldwork in 2014 by a research grant from the International Development Research Center from Canada (Award #107473–99906075-043), and a research grant from the Rufford Foundation (#15373–1). Support for ecological and fisheries data collection was provided by the Summit Foundation, MARFund (#RG-OAK-COBI-2017), The Oak Foundation (#OCAY-13–569), and the Inter-American Foundation (#ME-517) to COBI, A.C.

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Correspondence to Luis Malpica-Cruz.

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Conflict of interest

The first author, L. Malpica-Cruz, declares no conflict of interest. L. Malpica-Cruz conceived of the article, performed data analysis and wrote the first draft. A. Quintana, J.A. Zepeda-Domínguez and I.M. Côté also declare no conflict of interest. S. Fulton works for the non-governmental organization, Comunidad y Biodiversidad A.C. (COBI), which has worked with the Cozumel Cooperative on the commercial lionfish fishery; they provided ecological and interview data, and contextual information to interpret the program results. L. Tamayo and J.A. Canto Noh work for the Sociedad Cooperativa de Producción Pesquera Cozumel (Cozumel Cooperative), which participated in the commercial lionfish fishery. They provided fisheries-dependent ecological data and contextual insights about the fishery’s outcomes. B. Quiroga works for the National Commission of Natural Protected Areas (CONANP). All authors listed revised the manuscript for critical intellectual content; edited the manuscript; approve of the final manuscript form; and agree to be accountable for this work.

Ethics statement

The Mexican-based institutions participating in this study—Universidad Autonoma de Baja California (UABC: L. Malpica-Cruz) and Comunidad y Biodiversidad A.C (COBI: S. Fulton) are not required to receive approval from ethics committees and/or develop ethics protocols for studies involving research with humans. However, before the start of interviews or focus groups all participants gave informed consent to provide information for this study. Authors took reasonable precautions (e.g., using an encrypted hard drive; not recording names with audio files or quotations; monitoring subjects to assess whether questions were causing emotional distress) to ensure well-being and confidentiality for all of the participants.

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Malpica-Cruz, L., Fulton, S., Quintana, A. et al. Trying to collapse a population for conservation: commercial trade of a marine invasive species by artisanal fishers. Rev Fish Biol Fisheries 31, 667–683 (2021). https://doi.org/10.1007/s11160-021-09660-0

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