Rocio Alvarez-Varas

Rocio Alvarez-Varas
Universidad Católica del Norte (Chile) · Department of Marine Biology

MSc. Ph.D.
Postdoctoral Researcher Universidad Católica del Norte

About

23
Publications
9,125
Reads
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233
Citations
Additional affiliations
March 2016 - March 2020
University of Chile
Position
  • PhD Student
March 2016 - March 2020
University of Chile
Position
  • PhD Student
March 2016 - March 2020
University of Chile
Position
  • PhD (c)

Publications

Publications (23)
Article
Full-text available
Easter Island has experienced a marked increase in tourism during the past few decades; this has intensified the use of natural resources, which has in turn posed new threats to marine wildlife. To gather information on marine turtle species inhabiting Easter Island and research needs for their conservation, we conducted interviews with local commu...
Article
Full-text available
The hawksbill turtle (Eretmochelys imbricata; Critically Endangered) has a circumtropical distribution. In Polynesia it inhabits the waters of a great number of slands; however, up to date there are no official records for Easter Island. We document the first report of E. imbricata in Easter Island and Chile based on underwater hotographs and exami...
Chapter
Full-text available
It is possible to recognize the presence of sea turtles in Chile since the Cretaceous with fossil registry in the south of the country. In addition, pictographies and petroglyphs exist, in both continental and insular territory. This evidences the interaction between sea turtles and man since early times in history, either for consumption or cultur...
Article
Full-text available
Two divergent genetic lineages have been described for the endangered green turtle in the Pacific Ocean, occurring sympatrically in some foraging grounds. Chile has seven known green turtle foraging grounds, hosting mainly juveniles of different lineages. Unfortunately, anthropic factors have led to the decline or disappearance of most foraging agg...
Article
Marine species may exhibit genetic structure accompanied by phenotypic differentiation related to adaptation despite their high mobility. Two shape-based morphotypes have been identified for the green turtle (Chelonia mydas) in the Pacific Ocean: the south-central/western or yellow turtle and north-central/ eastern or black turtle. The genetic diff...
Article
Marine species may exhibit genetic structure accompanied by phenotypic differentiation related to adaptation despite their high mobility. Two shape-based morphotypes have been identified for the green turtle (Chelonia mydas) in the Pacific Ocean: the south-central/western or yellow turtle and north-central/eastern or black turtle. The genetic diffe...
Article
Patterns of genetic structure in highly mobile marine vertebrates may be accompanied by phenotypic variation. Most studies in marine turtles focused on population genetic structure have been performed at rookeries. We studied whether genetic and morphological variation of the endangered green turtle (Chelonia mydas) is consistent geographically, fo...
Technical Report
Full-text available
Five turtle species from seven regional management units (RMUs) inhabit the waters of 12 different countries in the East Pacific (EP) Ocean region. This Regional Overview section provides a brief summary of each RMU by species and is followed by detailed information in chapters from 10 (83.3%) of the countries found in the EP, with Canada and Guate...
Article
Patterns of genetic structure in highly mobile marine vertebrates may be accompanied by phenotypic variation. Most studies in marine turtles focused on population genetic structure have been performed at rookeries. We studied whether genetic and morphological variation of the endangered green turtle (Chelonia mydas) is consistent geographically, fo...
Article
Understanding animals' daily activity patterns such as foraging and resting is key to the effective conservation of individuals, populations, and species. Expanding habitat usage by humans today is likely one of the major factors influencing animal habitat use and behavior. Rapa Nui, a remote Chilean island located at the easternmost corner of the...
Article
Full-text available
Sea turtles are deeply rooted in Pacific cultures. Rapa Nui (Easter Island, Chile) has a complex societal and ecological history and marine resources have always been exploited; nevertheless, little is known about relationships between these resources and Rapanui islanders. This study aims to explore the historical and contemporary role of sea turt...
Article
Full-text available
The green turtle (Chelonia mydas) is a globally distributed marine species whose evolutionary history has been molded by geological events and oceanographic and climate changes. Divergence between Atlantic and Pacific clades has been associated with the uplift of the Panama Isthmus, and inside the Pacific region, a biogeographic barrier located wes...
Article
ABSTRACT: An adult olive ridley turtle Lepidochelys olivacea with lesions suggestive of fibro- papillomatosis was rescued on the coast of San Antonio, central Chile. Histopathologic analysis showed an exophytic and pedunculated mass formed by epidermal papillary projections supported by fibrovascular cores, epidermal hyperplasia and marked orthoker...
Article
Full-text available
Anthropogenic Marine Debris (AMD) in the SE Pacific has primarily local origins from land-based sources, including cities (coastal and inland), beach-goers, aquaculture, and fisheries. The low frequency of AMD colonized by oceanic biota (bryozoans, lepadid barnacles) suggests that most litter items from coastal waters of the Humboldt Current System...
Article
Full-text available
Abstract Context. Biological invasions have caused dramatic changes in native biodiversity and ecosystem function. Studies of genetic variation and evolutionary changes are useful for understanding population dynamics during biological invasions, and shed light on management, prevention and restoration strategies. Aims. This study aimed to invest...
Article
Full-text available
Penguins are reliable sentinels for environmental assessments of mercury (Hg) due to their longevity, abundance, high trophic level, and relatively small foraging areas. We analyzed Hg concentrations from blood and feathers of adult Humboldt penguins (Spheniscus humboldti) and feathers of chinstrap penguins (Pygoscelis antarcticus) from different r...
Article
Full-text available
Bahía Salado, located in northern Chile (27°41'S, 70°59'W), is the southernmost foraging ground for the endangered green turtle (Chelonia mydas) in the Eastern Pacific Ocean (EPO). To date, almost no information exists on its current status, nor on its connectivity with nesting rookeries in the EPO. This study aims to inform on the genetic characte...
Chapter
Full-text available
From northern Colombia to Tierra del Fuego, the South American continent stretches some 7,149 kilometers (4,443 miles) and is 4,353 km (2,705 mi) at its broadest. The fourth-largest continent, South America is number one in biodiversity. It is home to the world’s largest rainforest wilderness and river system (the Amazon) and to the world’s largest...
Article
Full-text available
The hawksbill turtle (Eretmochelys imbricata; Critically Endangered) has a circumtropical distribution. In Polynesia it inhabits the waters of a great number of islands; however, up to date there are no official records for Easter Island. We document the first report of E. imbricata in Easter Island and Chile based on underwater photographs and exa...

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Projects

Projects (2)
Project
Our general objective is to generate the scientific basis necessary to strengthen a strategy for the sustainable management and conservation of the biodiversity of seamounts and Chilean oceanic islands: Easter Island ecoregion, (Rapa Nui and Motu Motiro Hiva), Desventuradas Islands (San Ambrosio and San Félix) and Ecoregión de Juan Fernández (Robinson Crusoe, Alejandro Selkirk, Santa Clara). We propose to determine patterns and processes, explaining the biodiversity of these ecoregions, and identify the factors that threaten them. A community-based management strategy for marine resources and ecosystems will be developed through a participatory process with the communities.