Abstract
Since 2018 specimens of the ctenostomatous bryozoan Amathia alternata Lamouroux, 1816 have been recorded in the SW Atlantic, between 23.0° and 25.6° S. Previously known only in the Northern Hemisphere, in the Gulf of Mexico and Atlantic coast of the USA, from North Carolina to Florida, these records indicate new invasion events on the Brazilian coast, where the species was first found in March 2018, stranded on sandy beaches along the northern coast of São Paulo state. Recent finds of mass strandings between June and August 2021, including new reports from sandy beaches in different localities of Rio de Janeiro, southern coast of São Paulo, and Paraná, Brazil, suggest that the species has established itself successfully in the region and is spreading north- and southwards along the Brazilian coast, as previously reported for other introduced bryozoan species in the SW Atlantic. Accounts by local fishermen that the colonies are affecting catches indicate that the species might impact human livelihoods.
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Acknowledgments
We thank Sergio Luiz Costa Bonecker, João Paulo Bastardo Rodrigues, and Maikon di Domenico for sharing data, samples, and images of specimens from Rio de Janeiro, Ilha Comprida (SP), and Pontal do Sul (PR), respectively. We also thank Dennis Gordon and two anonymous reviewers for their comments and suggestions. This is a contribution of the NP-BioMar, USP.
Funding
This study was funded by a research grant from Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq 422563/2016-1 and CNPq 308768/2018-3).
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The authors declare no competing interest.
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No animal testing was performed during this study.
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All necessary permits for sampling and observational field studies have been obtained by the authors from the competent authorities and are mentioned in the acknowledgements. The study is compliant with CBD and Nagoya protocols.
Data availability
Specimens are deposited at the Museu de Zoologia, Universidade de São Paulo, Brazil, and at the bryozoan collection of Museu de Zoologia, Universidade Federal de Pernambuco, Brazil under numbers MZSP 2387–2394 and UFPE 1000–1007. Genetic data are deposited in GenBank (www.ncbi.nlm.nih.gov/genbank) under the accession numbers OK120839 and OK120385.
Author contribution
LMV conceived and designed the manuscript. KBN collected samples and provided DNA sequences. CFV and LMV conducted molecular analysis. KBN, AEM, and LMV wrote the original draft. AEM and LMV provided interpretation of the data, wrote, and reviewed the final version of the manuscript. All authors read and approved the manuscript.
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Communicated by B. W. Hoeksema
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Nascimento, K.B., Migotto, A.E., Vaga, C.F. et al. Occurrence of the bryozoan Amathia alternata Lamouroux, 1816 in the SW Atlantic: a new invasive species with potential impact on human livelihoods. Mar. Biodivers. 52, 19 (2022). https://doi.org/10.1007/s12526-022-01263-7
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DOI: https://doi.org/10.1007/s12526-022-01263-7