M. Marcovaldi

Publications22
h-index13
Citations858
Highly Influential Citations82
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Estimating sex ratios of loggerhead turtles in Brazil from pivotal incubation durations
A method of estimating natural sex ratios of hatchlings of species with temperature-dependent sexual differentiation from data on incubation durations is described. The method was applied to… Expand
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Marine turtles of Brazil:the history and structure of Projeto TAMAR-IBAMA
Abstract Projeto TAMAR-IBAMA, jointly administered by the Government of Brazil and the non-governmental organization Fundacao Pro-TAMAR, has established 18 conservation stations which cover 1100 km… Expand
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Conservation status of the loggerhead sea turtle in Brazil: an encouraging outlook
The loggerhead turtle Caretta caretta is one of the large and long-lived species that comprise the charismatic marine megafauna. The loggerhead is considered endangered, especially in the Pacific… Expand
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Population Structure and Diversity of Brazilian Green Turtle Rookeries Based on Mitochondrial DNA Sequences
ABSTRACT Mitochondrial DNA (mtDNA) sequences were determined for 168 green turtles (Chelonia mydas) nesting at the 3 known rookeries in Brazil: Trindade (n = 99), Atol das Rocas (n = 37), and… Expand
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Pivotal temperature and predicted sex ratios for hatchling hawksbill turtles from Brazil
Like all other species of sea turtle, the hawksbill turtle (Eretmochelys imbricata) exhibits temperature-dependent sexual differentiation, with high incubation temperatures producing females and low… Expand
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Satellite-tracking of female loggerhead turtles highlights fidelity behavior in northeastern Brazil
We studied inter- and postnesting movements in the major loggerhead Caretta caretta nesting population in Brazil. Ten breeding females were satellite-tracked from nesting grounds in the state of… Expand
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High-use areas, seasonal movements and dive patterns of juvenile loggerhead sea turtles in the Southwestern Atlantic Ocean
Characterizing the behaviors of sea turtles and identifying high-use areas as they vary in time and space is important for conservation planning, particularly when turtles overlap with fisheries that… Expand
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Sea Turtles and Fishery Interactions in Brazil: Identifying and Mitigating Potential Conflicts
Projeto TAMAR/IBAMA (TAMAR) has been actively involved in sea turtle conservation in Brazil for the past 25 years and currently operates a network of 21 research stations in 9 states distributed… Expand
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Avaliação do estado de conservação da tartaruga marinha Eretmochelys imbricata (Linnaeus, 1766) no Brasil
Apresentacao e justificativa de categorizacao O estado de conservacao da tartaruga marinha Eretmochelys imbricata (Linnaeus, 1766) (Cheloniidae) foi avaliado de acordo com os criterios da IUCN… Expand
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Satellite tracking of hawksbill turtles Eretmochelys imbricata nesting in northern Bahia, Brazil: turtle movements and foraging destinations
Data on hawksbill Eretmochelys imbricata migratory patterns are virtually unknown for nesting populations in the South Atlantic Ocean. The most significant nesting ground for hawksbills in the South… Expand
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