Evidence of Leatherback Turtles (Dermochelys coriacea) in Brazilian subtropical coastal waters

Fonseca, Juliana Mello; Cruz, Fabio Soares; Soares, Mariana; Souza, Pedro Mattos Pereira de; Tavares, Thiago Leal; Muniz, Raquel De Azeredo

doi:10.17161/randa.v30i1.18263

RandA

2023

DOI: 10.17161/randa.v30i1.18263

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Evidence of Leatherback Turtles (Dermochelys coriacea) in Brazilian subtropical coastal waters

Juliana Mello Fonseca

Fabio Soares Cruz

Mariana Soares

et al.

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Spatial ecology and conservation of leatherback turtles (Dermochelys coriacea) nesting in Bioko, Equatorial Guinea

Garzon,

Barrientos,

Anvene

et al. 2023

PLoS ONE

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Bioko Island (Equatorial Guinea) hosts important nesting habitat for leatherback sea turtles, with the main nesting beaches found on the island’s southern end. Nest monitoring and protection have been ongoing for more than two decades, although distribution and habitat range at sea remains to be determined. This study uses satellite telemetry to describe the movements of female leatherback turtles (n = 10) during and following the breeding season, tracking them to presumed offshore foraging habitats in the south Atlantic Ocean. Leatherback turtles spent 100% of their time during the breeding period within the Exclusive Economic Zone (EEZ) of Equatorial Guinea, with a core distribution focused on the south of Bioko Island extending up to 10 km from the coast. During this period, turtles spent less than 10% of time within the existing protected area. Extending the border of this area by 3 km offshore would lead to a greater than threefold increase in coverage of turtle distribution (29.8 ± 19.0% of time), while an expansion to 15 km offshore would provide spatial coverage for more than 50% of tracking time. Post-nesting movements traversed the territorial waters of Sao Tome and Principe (6.4%of tracking time), Brazil (0.85%), Ascension (1.8%), and Saint Helena (0.75%). The majority (70%) of tracking time was spent in areas beyond national jurisdiction (i.e. the High Seas). This study reveals that conservation benefits could be achieved by expanding existing protected areas stretching from the Bioko coastal zone, and suggests shared migratory routes and foraging space between the Bioko population and other leatherback turtle rookeries in this region.

show abstract

Spatial ecology and conservation of leatherback turtles (Dermochelys coriacea) nesting in Bioko, Equatorial Guinea

Garzon,

Barrientos,

Anvene

et al. 2023

PLoS ONE

View full text Add to dashboard Cite

show abstract

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Evidence of Leatherback Turtles (Dermochelys coriacea) in Brazilian subtropical coastal waters

Cited by 1 publication

References 22 publications

Spatial ecology and conservation of leatherback turtles (Dermochelys coriacea) nesting in Bioko, Equatorial Guinea

Spatial ecology and conservation of leatherback turtles (Dermochelys coriacea) nesting in Bioko, Equatorial Guinea

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