Robson Guimarães dos Santos

Robson Guimarães dos Santos
Universidade Federal de Alagoas · Institute of Biological Sciences and Health (ICBS)

PhD

About

41
Publications
12,376
Reads
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1,013
Citations
Additional affiliations
January 2010 - December 2015
March 2007 - December 2015
Universidade Federal do Espírito Santo
Position
  • Researcher

Publications

Publications (41)
Article
In the last decade many studies have described the ingestion of plastic in marine animals. While most studies were dedicated to understanding the pre-ingestion processes involving decision-making foraging choices based on visual and olfactory cues of animals, our knowledge in the post-ingestion consequences remains limited. Here we proposed a theor...
Article
Human activities are changing our environment. Along with climate change and a widespread loss of biodiversity, plastic pollution now plays a predominant role in altering ecosystems globally. Here, we review the occurrence of plastic ingestion by wildlife through evolutionary and ecological lenses and address the fundamental question of why living...
Article
Full-text available
Group formation is a common behaviour among prey species. In egg-laying animals, despite the various factors that promote intra-clutch variation leading to asynchronous hatching and emergence from nests, synchronous hatching and emergence occurs in many taxa. This synchrony may be adaptive by reducing predation risk, but few data are available in a...
Article
This study evaluated the influence of environmental degradation on the nutritional value of the main marine macrophytes consumed by green sea turtles (Chelonia mydas) in areas with different degrees of urbanization. Macrophyte assemblages in the highly urbanized area (HUa) showed lower richness compared to the lightly urbanized area (LUa) (Mann-Whi...
Article
Oil pollution has signifi cantly contributed to coral reef decline in the last fi ve decades and a major oil spill reached Brazilian tropical coast in August 2019. Here, we report the fi rst evidence of direct crude oil contact from that spill on reef coral species, and evaluate the effects of this disaster on coral vitality and benthic assemblage...
Article
Potential effects of climate change on living species are a widely debated topic. Species with temperature-dependent sex determination can be particularly impacted by warmer temperatures because unbalanced sex ratios could threaten population viability. In sea turtles, sex ratio estimates have highlighted the potential feminization of current popul...
Article
Juvenile sea turtles recruit in coastal areas where they act as habitat engineers modifying the coastal landscape through feeding. However, little is known about the coexistence of these mega-vertebrates and their potential competition for resources. In this work, diet, food selectivity, trophic niche width and niche overlap of juveniles of two sym...
Article
Abstract: Long Term Ecological Research (LTER) generates unique data sets that have the potential to identify and quantify trends in ecological processes that may be difficult to detect at lower temporal resolutions. Even though many LTER sites are within protected areas, they do not necessarily produce data that are well aligned with the objective...
Article
Little attention has been drawn toward the effects of marine debris ingestion in relation to nutrient acquisition and fitness consequences. We tested whether anthropogenic debris ingestion influence the nutritional niches of endangered green turtles (Chelonia mydas) in estuarine and reef habitats on the Brazilian coast. Our results showed that estu...
Article
Monitoring green sea turtles in Brazilian feeding areas: relating body condition index to fibropapillomatosis prevalence—CORRIGENDUM - Silmara Rossi, Angélica María Sánchez-Sarmiento, Robson Guimarães dos Santos, Roberta Ramblas Zamana, Fabiola Eloisa Setim Prioste, Marco Aurélio Gattamorta, Pablo Felipe Cruz Ochoa, José Henrique Hildebrand Grisi-F...
Article
Fibropapillomatosis (FP) can be an important conservation threat to green sea turtles ( Chelonia mydas ) due to its widespread distribution and complex aetiology. Thus, understanding the impacts of FP in sea turtle populations is a research priority towards conservation efforts. The body condition index (BCI), based on straight carapace length (SCL...
Article
Marine debris is widespread in oceans worldwide, including the most remote locations. Here, for the first time, we report macro-debris accumulation on beaches of Trindade Island, a remote island 1160 km from mainland Brazil. High debris density was recorded on windward, east-coast beaches, which are exposed to wind-driven currents. Small-sized plas...
Article
Full-text available
Fibropapillomatosis (FP) is a neoplastic disease that affects marine turtles worldwide, especially green sea turtles (Chelonia mydas). FP tumors can develop on the body surface of marine turtles and also internally in the oral cavity and viscera. Depending on their quantity, size and anatomical distribution, these tumors can interfere with hydrodyn...
Data
Simplified instructions on how to record the number, size and distribution of FP tumors in sea turtles, and how to obtain FPI and FPSSWA. (DOCX)
Article
Few records of humpback whales (Megaptera novaeangliae) have been made in Brazilian oceanic waters. This article reports the first record of bottom contact behaviour by humpback whales in Brazilian waters and adds four new sightings of the species to Trindade, an island located 1160 km from the Brazilian coast. The bottom contact behaviour has been...
Article
Marine debris is currently distributed worldwide, and the discard and contamination pose hazards to human and wildlife health. One of the gaps in debris science is tracking the source of debris to better evaluate and avoid the pathway of debris from the source to marine environment. For this, we evaluated three beaches of different urbanization lev...
Article
Many factors threaten the survival of marine turtles, such as incidental capture by fisheries, habitat degradation, pollution and diseases. One of the most important diseases is fibropapillomatosis (FP), characterized by the development of benign skin tumours. FP predominantly affects juvenile green sea turtles ( Chelonia mydas ) and involves a com...
Article
Changes in green turtle Chelonia mydas foraging patterns were evaluated within a latitudinal gradient along tropical and subtropical coasts in the southwestern Atlantic and investigated as to how green turtles responded to regional and local changes in their foraging habitats. In addition, we evaluated how changes in feeding ecology caused populati...
Article
Full-text available
Here we provide information on the diet of juvenile green turtles from neritic developmental habitats in the South Atlantic that indicates the existence of a gradual dietary shift from a primarily carnivorous to a primarily herbivorous diet. Linear regression showed a relation between the size of turtles (n = 22) and the proportion of vegetal matte...
Article
In May 2011, a Rhincodon typus was sighted on the continental shelf of the central Brazilian coast, in the vicinity of a gas platform. During the video record, an interspecific following association was observed between a Caranx crysos school and the R. typus.
Article
Full-text available
In this study we analyze the population structure and diet of the coney Cephalopholis fulva at Trindade Island, Brazil, through direct observation with SCUBA diving in 11 reef sites around the Island, up to 50 m deep. Diet was based on 77 individuals collected with speargun. Mean population density and biomass were estimated at 29 individuals/100 m...
Article
The diet of 50 juvenile green turtles Chelonia mydas live-captured incidentally by fixed fishing traps between January and June 2009 in Cananéia Estuarine– Lagoon complex, Brazil, was studied through analysis of esophageal lavage samples. Green turtles consumed an omnivorous diet, with 18 food components identified and grouped into 4 categories as...
Article
The community structure of the reef fish fauna of Trindade Island, a volcanic oceanic island located 1160 km off the coast of Brazil, is described based on intensive visual censuses. Seventy-six species were encountered in 252 censuses, with mean ± S.E. of 99 ± 3 individuals and 15.7 ± 0.3 species 40 m(-2) transect. The average fish biomass, calcul...
Article
Full-text available
We documented the presence of fibropapillomatosis (FP), a debilitating tumor-forming disease, in marine turtles in Espirito Santo Bay (Brazil) from March 2007 to April 2008, and assessed the value of a specific environmental index for predicting the prevalence of FP. Turtles were captured monthly with entanglement nets and scored for presence and s...
Article
Full-text available
RESUMO O estudo relata a fauna de mamíferos de remanescentes florestais na cidade de João Pessoa, Estado da Paraíba (07º06'S, 34º51'W). Foram registradas 37 espécies, distribuídas em 18 famílias e 7 ordens. São apresentadas breves descrições das espécies e comentários taxonômicos. Discutem-se alguns aspectos sobre a conservação da fauna local. Pala...
Article
Coastal gill net entanglement and debris intake are important threats to the survival of sea turtles. Two sea turtles (Lepidochelys olivacea and Chelonia mydas) were found stranded along the coast of Paraíba. After necropsy, plastic debris were found in the stomach. The debris is described. This is the first record of this sort of problem for the P...
Article
Macro crustáceos da Ponta do Cabo Branco, João pessoa, Paraíba, Brasil, o extremo oriental da America do Sul. A ponta do Cabo Branco apresenta, na sua região e entre-marés e na parte rasa do sublitoral, uma grande quantidade de rochas arenítico-ferruginosas, formando diversos habitats para crustáceos escavadores e habitantes de fendas. Um inventari...

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Projects

Projects (4)
Project
The project is divided into five goals: - Identifying and monitoring foraging and nesting areas (methods: drones, beach monitoring and local knowledge); - Understand the ecological role of green turtle in a coral reef (methods: diet and SIA); - Describe the genetic diversity of a green turtle population and evaluate how genetic composition at this site compares with other FGs at the SWA; - Evaluate the anthropogenic impacts on sea turtles population (FP, plastic ingestion and fishery); - Understand the social/cultural importance of sea turtles in the study area.