Navegando por Autor "SANTOS, E.A.P."

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Artigo
Effectiveness and design of marine protected areas for migratory species of conservation concern: A case study of post-nesting hawksbill turtles in Brazil
(2021-06-21) SANTOS, A.J.B.; BELLINI, C.; SANTOS, E.A.P.; SALES, G.; RAMOS, R.; VIEIRA, D.H.G; MARCOVALDI, M.A.; GILLIS, A.; WILDERMANN, N.; MILLS, M.; GANDRA, T.; FUENTES, M.M.P.B.
Marine protected areas (MPAs) are among the most widely used strategy to protect marine ecosystems and are typically designed to protect specific habitats rather than a single and/or multiple species. To inform the conservation of species of conservation concern there is the need to assess whether existing and proposed MPA designs provide protection to these species. For this, information on species spatial distribution and exposure to threats is necessary. However, this information if often lacking, particularly for mobile migratory species, such as marine turtles. To highlight the importance of this information when designing MPAs and for assessments of their effectiveness, we identified high use areas of post-nesting hawksbill turtles (Eretmochelys imbricata) in Brazil as a case study and assessed the effectiveness of Brazilian MPAs to protect important habitat for this group based on exposure to threats. Most (88%) of high use areas were found to be exposed to threats (78% to artisanal fishery and 76.7% to marine traffic), where 88.1% were not protected by MPAs, for which 86% are exposed to threats. This mismatch is driven by a lack of explicit conservation goals and targets for turtles in MPA management plans, limited spatial information on species' distribution and threats, and a mismatch in the scale of conservation initiatives. To inform future assessments and design of MPAs for species of conservation concern we suggest that managers: clearly state and make their goals and targets tangible, consider ecological scales instead of political boundaries, and use adaptative management as new information become available.
Artigo
Internesting intervals of hawksbill turtles through satellite tracking using gps reveals residence fidelity
(2019) BELLINI, C.; SANTOS, E.A.P.; RAMOS, R.; MARCOVALDI, M. A.; SANTOS, A. J. B.
Artigo
Olive ridley inter-nesting and post-nesting movements along the Brazilian coast and Atlantic Ocean. Endangered Species Research
(2019-11-14) SANTOS, E.A.P.; SILVA, A.C.C.D.; SFORZA, R.; OLIVEIRA, F.L.C.; WEBER, M.I.; CASTILHOS, J.C.; LÓPEZ-MENDILAHARSU, M.; MARCOVALDI, M.A.A.G.; RAMOS, R.M.A.; DIMATTEO, A.
The states of Sergipe and Bahia comprise the main nesting beaches for olive ridley sea turtles Lepidochelys olivacea in Brazil. Between February 2014 and March 2015, 40 L. olivacea were equipped with Argos platform transmitter terminal tags. A state-space model was applied to Argos location data to investigate the animals’ spatial ecology and identify areas of restricted movements (ARMs) and directional movements. The inter-nesting ARMs included the continental shelf from the south of Alagoas state to the north of Bahia, totaling 7244 km2 (kernel density estimation, 90% isopleth) and generally extended up to 22 km from the coast or to the 50 m isobath. The post-nesting directional movements were classified as either (1) neritic north/ northeastern (N/NE) Brazil to French Guiana (n = 4 turtles), (2) neritic south/southeastern (S/SE) Brazil (n = 16), or (3) oceanic (n = 19) from Brazil to West Africa. ARMs consistent with foraging areas were identified for 24 olive ridleys: 15 along the continental shelf of SE Brazil, 2 adjacent to Ceará and Maranhão states (between the 25 and 75 m isobaths), and 7 off the African countries of Cape Verde, Senegal, Gambia, Guinea-Bissau, and Sierra Leone. The results de monstrated the complexity of olive ridley movements from northern Brazil, raised questions about connectivity, and highlighted threats such as fisheries, ports, and hydrocarbon exploration fields overlapping with, or near to, high-use areas. These results can be used as a basis for spatial management measures to protect this endangered species.
Artigo
Satellite tracking of hawksbill turtles between nesting seasons: a case study of high fidelity
(2019) SANTOS, A.J.B.; BELLINI, C.; SANTOS, E.A.P.; RAMOS, R.; VIEIRA. D.H.G.; MARCOVALDI, M.A.
Artigo
Where do the olives go after nesting in Brazil? Implications for conservation
(2016) SANTOS, E.A.P.; SILVA, A. C. D; SFORZA, R.; OLIVEIRA, F. L. C.; WEBER, M.I.; CASTILHOS, J.C.; GARCIA, R.S.; MENDILAHARSU, M.M. L.; MARCOVALDI, M. A. G.; RAMOS, R. M. A.; DIMATTEO, A.