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Shark hotspot: Drivers for distribution and conservation in a tropical oceanic archipelago of the Atlantic Ocean

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Wohak, Kirsten ; Rangel, Bianca De Sousa ; Garla, Ricardo Clapis ; Afonso, Andre S. ; Pimentel, Caio Ribeiro ; Anderson, Antonio Batista ; Cruz, Guilherme Loyola Da ; Delfino, Stephanie D. T. ; Joyeux, Jean-Christophe ; Giarrizzo, Tommaso ; Rocha, Luiz Alves ; Pinheiro, Hudson Tercio
Número total de Autores: 12
Tipo de documento: Artigo Científico
Fonte: PERSPECTIVES IN ECOLOGY AND CONSERVATION; v. 23, n. 4, p. 8-pg., 2025-10-18.
Resumo

Sharks play an essential role in maintaining the health of ecosystems, but many species are endangered and have locally disappeared around the world. Their management, where established Marine Protected Areas (MPAs) and strict fishing regulations exist, has contributed to the recovery and maintenance of shark populations. However, the overlap between shark populations and increasing human activities can result in incidents and socioenvironmental conflicts. The present study used data from baited remote underwater video systems, citizen science, drones, and scientific captures to identify drivers of shark distribution around the Fernando de Noronha Archipelago (FNA), a tourist destination offshore Brazil. Our findings place FNA among the world's shark aggregation spots for both richness and abundance. They also show that both environmental (reef, trophic level, seaturtle grounds) and anthropogenic variables (fishing grounds, diving sites, beaches) are important predictors of shark distribution, signaling strong overlap and competition with humans for space and resources. This intensive space sharing is also corroborated by a species distribution model developed for tiger sharks. Furthermore, it is shown that the home range of adults and some species extend beyond its limits into areas where fishing is allowed with restrictions. Therefore, this study proposes an extension of the limits of the MPA and methods for human-shark interaction mitigation. The island's economy strictly depends on ecotourism and these conservation measures are essential for a sustainable future to both sharks and humans. (AU)

Processo FAPESP: 21/07039-6 - Biodiversidade, biogeografia e conservacão de ecossistemas recifais mesofóticos no Oceano Atlântico
Beneficiário:Hudson Tercio Pinheiro
Modalidade de apoio: Bolsas no Brasil - Programa BIOTA - Jovens Pesquisadores
Processo FAPESP: 19/24215-2 - Biodiversidade, biogeografia e conservação de ecossistemas recifais mesofóticos no Oceano Atlântico
Beneficiário:Hudson Tercio Pinheiro
Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Jovens Pesquisadores