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Age-dependent strategies related to lionfish activities in the Mexican Caribbean

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Abstract

Lionfish are successful invasive predators in the Caribbean region and inhabit a large range of habitats. Our study in the Caribbean has focused on the relationships between the biological characteristics of lionfish particularly their size, their activities and use of those different habitats. In this study, we observed a high number of lionfish individuals, focusing on the behavioural activities and biological traits in relation to different habitats and environmental characteristics. We monitored 793 individuals, recording their activities, biological traits, and habitat characteristics. Our results report that lionfish are not solitary, but frequently form groups for many activities. We provide evidence of differences between lionfish habitat use according to activity, and the size of individual fish. Considering the size is correlated with age, coral reefs appear to be the preferred habitat of older individuals, whereas the youngest lionfish use a diversity of habitats, ranging from mangroves to coral reefs. In addition, this study suggests that predation of lionfish is age-dependent strategy, and depends on time and the tone of the environment. Lionfish do not only use the head-down posture to catch prey but also horizontal and head-up postures. The youngest lionfish hunt mainly in dark areas and during the night while the older fish were observed hunting mostly during the day and in clear areas. These new aspects of lionfish ecology and behaviour are discussed in light of their invasive success.

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Acknowledgements

We would like to thank CONANP (Comisión Nacional de Areas Naturales Protegidas, Mexico) as well as Banco Chinchorro Biosphere Reserve for the important support provided during fieldwork, and two anonymous reviewers for their helpful commentaries. We are also grateful to Estefanía Medina Bastarrachea for creating the map.

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Correspondence to Yann Hénaut.

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All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.

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The authors declare that they have no conflict of interest.

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García-Rivas, M.d.C., Machkour-M’Rabet, S., Pérez-Lachaud, G. et al. Age-dependent strategies related to lionfish activities in the Mexican Caribbean. Environ Biol Fish 101, 563–578 (2018). https://doi.org/10.1007/s10641-018-0718-2

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  • DOI: https://doi.org/10.1007/s10641-018-0718-2

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