Journal
CONSERVATION LETTERS
Volume 10, Issue 6, Pages 726-735Publisher
WILEY
DOI: 10.1111/conl.12426
Keywords
citizen science; eradication; exotic species removal; fishing tournament; hunting; lionfish; non-native species; population suppression; Pterois volitans; miles; public engagement; volunteer effort
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Funding
- Florida Sea Grant, University of Florida [NA10OAR4170079]
- Mote Marine Lab Protect our Reefs Grant [POR-2011-30]
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Species invasions often occur at geographic scales that preclude complete eradication, setting up long-term battles for population control. To understand the extent to which exotic species removal by volunteers can contribute to local invasion suppression and alleviate invasion effects, we studied the activities of volunteers culling invasive lionfish during annual derby events in the Atlantic. From 2012 to 2014, single-day derbies reduced lionfish densities by 52% over 192 km(2) on average each year. Differences in recolonization and productivity between regions meant that annual events were sufficient to suppress the invasion below levels predicted to cause declines in native species in one region, but not the other. Population reduction was not related to catch per unit effort, confirming the importance of in situ monitoring to gauge control effectiveness. Culling by volunteers may be a useful tool in areas where exotic species are easily identified and safely captured, and culling can be promoted as an ongoing recreational activity. Strategically guiding volunteer effort toward sensitive or underserved habitats could aid practitioners in optimizing their use of limited resources for invasion management.
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