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URI permanente desta comunidadehttps://bdc.icmbio.gov.br/handle/cecav/1402
Centro Nacional de Pesquisa e Conservação de Tartarugas Marinhas e da Biodiversidade Marinha do Leste
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Item MANAGEMENT UNITS: CHALLENGES TO PROMOTE UNDERSTANDING AND CONSERVATION OF MARINE TURTLES IN OCEANIC AREAS(2015) Sales, G.; Britto, M.; Fiedler, F.N.; Giffoni, B.; Domingo, A.; Leite, N.; Miller, PhilipThis document presents a discussion and some recommendations with regards to appropriate management units to promote the conservation of marine turtles in oceanic areas used by tuna longline fisheries under ICCAT. We comment on the utility of using Regional Management Units (RMUs) for marine turtles as proposed by Wallace et al. (2010). Per Wallace (2010 et al), RMUs refer to geographically explicit population segments, based on biogeographical data (e.g. nesting sites, genetics, telemetry) that can be applied to regionally appropriate management issues. RMUs are not intended to represent complete geographic distributions of species on global or regional scales, but rather distributions that are anchored to landmasses by known nesting site(s) and/or genetic stock origins and defined by biogeographical information. While RMUs are important to contribute to our understanding of key aspects of marine turtle populations, this analysis indicates that marine turtle RMUs do not cover all requirements to define management units to the ICCAT fisheries. Considering that the longline fishing are compose of different kind of fisheries, using distinct fishery strategies and operate in distinct at-sea regions, these fisheries interact with marine turtle mixed stocks in foraging and developmental areas. We recommend ICCAT adopt the “Fishery”as the principal concept to define Management Unit (rather than sea turtle RMUs) in order to understand and reduce marine turtle interactions in the ICCAT fisheriesItem 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.- Detection and characterization of fibropapilloma-associated turtle herpesvirus in marine turtles for Brazil.(2009-11) RODENBUSCH, C.R; ALMEIDA, L.L; MARKS, F.S; BAPTISTOTTE, C; PIRES, T.T; WERNECK, M.R; DAMASCENO, T; ALIEVI, M.M; CANAL, C.N
Item Effectiveness and design of marine protected areas for migratory species of conservation concern: A case study of post-nesting hawksbill turtles in Brazil(Elsevier, 2021-06-21) Armando J.B., Santos; Bellini, C.; Santos, E.A.P.; Sales, G.; Ramos, R.; Vieira, D.H.G.; Marcovaldi, M. A.; Gillisf, Anthony; Wildermann, N.; Millsi, 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 con servation 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.Item Revisiting the genetic diversity and population structure of the critically endangered leatherback turtles in the South-west Atlantic Ocean: insights for species conservation(Journal of the Marine Biological Association of the United Kingdom, 2017) Vargas, Sarah m.; Lins, Luana S. F.; Mmolfetti, Erica; Ho, Simon Y. W.; Monteiro, Danielle; Barreto, Jonathan; Colman, Liliana; Vila-verde, Lucas; Baptistotte, Cecilia; Thome, Joao Carlos Alciati; Santos, Fabricio R.The worldwide population of the leatherback turtle (Dermochelys coriacea) encompasses seven subpopulations among the Pacific, Atlantic and Indian Oceans. It has experienced declines across parts of its distribution, with the subpopulation of the South-west Atlantic listed as critically endangered by the IUCN Red List. The main threats to this subpopulation include its interaction with fisheries, coastal development, pollution and climate change. In this study, we sequenced mitochon drial DNA from 52 leatherback turtles in Brazil and combined these with published data from other Atlantic Ocean rookeries. The haplotype diversities of the Atlantic population rookeries ranged from 0.112 to 0.533 and are not directly proportional to current rookery sizes. The Brazilian rookery, despite recording low nest numbers per year, had the second-highest haplotype diversity among all Atlantic rookeries (h ¼ 0.532). A mixed-stock analysis revealed that the South American pelagic aggregate is primarily composed of individuals from West Africa (84%), with contributions from the North Atlantic rookeries (14%). Leatherback turtles appear to have a complex phylogeographic pattern, showing evidence of multiple colonization events and a lack of isolation by distance. Our novel dataset, based on DNA sequences of 695 base pairs, will provide baseline data needed to understand population dynamics in the region, building comprehensive population assessments to support and develop management strategies. Having both the only known regular rookery in the South-west Atlantic, and a mixed-origin foraging area for the species along its coast, Brazil has a key role in the conservation of the leatherback turtle.