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January 1995 - present
Publications
Publications (227)
Mercury pollution is a matter of global concern due to its detrimental effects on ecosystems and human well-being. Seabirds generally occupy high levels within trophic chains and are often used as valuable indicators of marine pollution, including mercury contamination. We examined the concentrations of total mercury (THg) in the ventral feathers o...
This study examines the presence and distribution of persistent organic pollutants (POPs) in the liver tissues of six Procellariiformes species during migration in southern Brazil. POPs, including PCBs, DDTs, and Mirex, pose significant threats to marine ecosystems due to their persistence and bioaccumulative nature. Procellariiformes, such as alba...
Influenza A viruses of the H2 subtype represent a zoonotic and pandemic threat to humans due to a lack of widespread specific immunity. Although A(H2) viruses that circulate in wild bird reservoirs are distinct from the 1957 pandemic A(H2N2) viruses, there is concern that they could impact animal and public health. There is limited information on A...
During their northward migration, Red Knots Calidris canutus rufa stop at the Lagoa do Peixe National Park in the extreme south of Brazil to build up fat reserves for their journey to their Canadian breeding grounds. We tracked five Red Knots with PinPoint Argos-75 GPS transmitters to investigate differences in migration strategies from this stopov...
The Yellow-legged Tinamou (Crypturellus noctivagus) is an endemic and threatened Brazilian forest bird. In the Rio Grande do Sul state, the species was reduced to only one relictual population estimated in 18 adult individuals. Here, we unveil a second population of C. noctivagus for this state and a record of eggs predation by a Black-and-white Te...
The southern giant petrel ( Macronectes giganteus ) is a widely distributed top predator of the Southern Ocean. To define the fine-scale foraging areas and habitat use of Antarctic breeding populations, 47 southern giant petrels from Nelson Island were GPS-tracked during the summers of 2019–2020 and 2021–2022. Step-selection analysis was applied to...
Spheniscus magellanicus is a coastal seabird distributed on the continental shelf of Patagonia and during its winter migration it can reach the south and southeast coast of Brazil. Due to its distribution, the species is subject to several anthropic threats such as fishing and pollution. We aimed to investigate plastic contamination in S. magellani...
Plastic pollution is distributed patchily around the world’s oceans. Likewise, marine organisms that are vulnerable to plastic ingestion or entanglement have uneven distributions. Understanding where wildlife encounters plastic is crucial for targeting research and mitigation. Oceanic seabirds, particularly petrels, frequently ingest plastic, are h...
Specific techniques for the efficient capture of forest tinamous in a short sampling time are yet poorly described in the literature. Here, we report the efficiency of the bell-trap in the capture of Brown Tinamou (Crypturellus obsoletus) and Tataupa Tinamou (Crypturellus tataupa), in southern Brazil. We used three bell-traps adapted with casting n...
Dramatic decreases of chinstrap penguin populations across the Antarctic Peninsula (AP) are
thought to be influenced by climate-driven changes affecting its main prey, the Antarctic krill,
however, empirical evidence supporting such hypotheses are scarce. By coupling data on breeding
chinstrap penguins, environmental remote sensing and estimates of...
Seabirds are important bioindicators of environmental quality as their feathers contain records of metal concentration. Among the metals, mercury (Hg) is toxic, causing damage to the organism even in small concentrations. The objective of this study is to determine and evaluate the total Hg levels in brown booby feathers in the São Pedro and São Pa...
Persistent organic pollutants were investigated in the blood of living seabirds (Pterodroma arminjoniana, Onychoprion fuscatus, Sula dactylatra, Anous minutus, Anous stolidus and Sula leucogaster) from two Brazilian Conservation Units - Trindade Island and São Pedro and São Paulo Archipelago. ∑PCBs (0.55 to 55.09 ng/g wet weight (ww), ∑DDTs (0.01 t...
The Masked Booby Sula dactylatra is a surface-nesting seabird that breeds on offshore islands across the tropical and subtropical oceans. On inaccessible rocky areas on Trindade Island, located about 1 200 km from Espírito Santo, Brazil, the nesting of this species has been poorly studied. To model the species' nesting habitat suitability at Trinda...
Wild aquatic birds are the natural reservoirs of avian influenza viruses (AIVs). It is estimated that 100 million seabirds live in the Antarctic Peninsula and adjacent islands, regularly encountering migratory birds that use the islands to nest. Between 2010 and 2013, we collected samples from 865 seabirds in Elephant, King George and Livingston is...
As crescentes atividades antrópicas são responsáveis por alterações nos ecossistemas e, consequentemente, influenciam as taxas de reprodução e sobrevivência da fauna nos ambientes terrestres, aquáticos e marinhos. As espécies de aves marinhas compõem o grupo mais ameaçado de extinção dentre a classe Aves. Para a ordem Suliformes, 30% das espécies e...
The Lagoa do Peixe National Park is an important stopover area during the migration of Calidris canutus rufa between wintering and breeding grounds. Our objectives were to monitor the Red Knot migration, make population estimates during the stopover in southern Brazil, assess prey availability, and follow the species migratory route using GPS, flag...
Concentrations of Hg and Se were assessed in dorsal feathers of Southern Giant Petrels (SGP) from three Antarctic islands. Feather sampling was conducted during four breeding seasons (2011 to 2014) at Elephant and King George Islands, and during two breeding seasons (2012 and 2013) at Livingston Island. Hg concentrations found in SGP feathers range...
Snow petrels (Pagodroma nivea) are a gregarious, pagophilic and endemic species to the Antarctic region with a circumpolar breeding distribution. Between Dec 2021 and Feb 2022, we registered 49 carcasses of adults of the subspecies Pagodroma n. nivea scattered along the coast of Harmony Point (62°18'S; 59°10'W), Nelson Island, and at least 7 carcas...
The Endangered Vinaceous-breasted Parrot, Amazona vinacea, is endemic to the Atlantic Forest. Habitat fragmentation and nest poaching have had a substantial impact on the conservation of the species. These anthropogenic factors, combined with uncertainty regarding the species’ ecology, distribution and population size, make it difficult to plan man...
The species Onychoprion fuscatus or Sooty Tern, as it is popularly known, é is considered a marine Bird of pelagic habits, once its breeding areas are restricted to tropical oceanic islands and, according to the scientific literature, the species’ diet is mainly composed by fish and cephalopods. In general, studies reporting the ingestion of cnidar...
The Antarctic biodiversity, beyond the species composition, also comprises interactions between fauna and flora. M. giganteus, is one of the species that occupy the antarctic ice-free areas for reproduction. The moss Sanionia uncinata (Hedw.) Loeske and Deschampsia antarctica Desv. gress, common in Antarctica, with other species make up vast green...
As aves limícolas contemplam diversas espécies associadas às áreas úmidas, muitas das quais migratórias, que são extremamente dependentes da Zona Costeira. Concentram-se nos ambientes costeiros para descanso e forrageio durante o seu ciclo migratório, ou para reprodução no caso das espécies residentes. O desenvolvimento das atividades socioeconômic...
The current study aimed to identify malophages in a population of Yellow-legged Tinamou (Crypturellus noctivagus noctivagus) and Brown Tinamou (Crypturellus obsoletus obsoletus) in the Pampa Biome, state of Rio Grande do Sul, Brazil. In 250 hours of sampling efforts, using bell-traps, we captured eleven specimens of C. n. noctivagus, and of these,...
Antarctic Specially Protected Areas (ASPAs) provide the strongest environmental protection in Antarctica. However, they are not immune from anthropogenic pollution of marine or terrestrial origin. We document anthropogenic debris within ASPA No. 133 Harmony Point, Nelson Island, recovering 1544 items between November 2019 and January 2020. The majo...
Studies on nocturnal birds in the Neotropical region are still considered scarce in the literature, lacking bioecological approaches to this group in the wild. e present study aimed to obtain information on the abundance, richness, and composition of nocturnal birds found in forest fragments in the Central Region, state of Rio Grande do Sul, Braz...
A Correction to this paper has been published: https://doi.org/https://doi.org/10.1007/s43388-021-00051-4
Southern giant petrels (Macronectes giganteus) are a scavenger and predatory species with highly opportunistic feeding habits. Although cannibalism is a likely behavior for a predatory and colonial species, there are no confirmed records of this behavior for giant petrels. In this study, we describe two cases of cannibalism in a population of south...
Five of the seven extant sea turtle species in the world forage on the coast of Southern Brazil at least in some stage of their life cycle. The green turtle Chelonia mydas frequently strands on beaches of Rio Grande do Sul State. The species is currently classified as vulnerable to extinction in the region, and pollution by marine debris is one of...
We report the sighting of a specimen of Black-headed Gull ( Chroicocephalus ridibundus ) in Saint Peter and Saint Paul Archipelago (SPSPA), Brazil, in the mid-Atlantic Ocean. Chroicocephalus ridibundus is a Palearctic species that breeds throughout Europe. Part of the population spends winters in the Mediterranean and coasts of Africa, and a small...
https://www.youtube.com/watch?v=bFWKyKGwBoA&ab_channel=CALOOceanologiaFURG
Aberrant colored plumages in birds are not uncommon events in nature. These cases might be associated with genetic, environmental and nutritional factors, the presence of parasites, or even age. This study had the objective of reporting two new aberrant plumage cases in Vanellus chilensis individuals, an individual with progressive greying and a me...
Facing the growing demand for renewable energy sources, the use of wind energy has been significantly increasing worldwide. Wind farms are known to present low environmental impact and their impact on bird fauna has been the most studied and discussed. In this study, we evaluated the composition of bird communities and changes in land use during th...
Recent studies have shown that many species of apparently monogamous birds engage in extra-pair copulation (EPC). Penguins have intense shared parental care for their young, and thus have been considered monogamous. The present study aimed to assess the reproductive system of the gentoo penguin (Pygoscelis papua) on Elephant Island, Antarctica, by...
The Yellow-legged Tinamou (Crypturellus noctivagus) is a terrestrial forest bird endemic to Brazil. Females and males of the subspecies Crypturellus noctivagus noctivagus are indistinguishable at the naked eye and there is lack of knowledge regarding means to discriminate sexes in the field. We investigated morphometric differences between sexes of...
Nós analisamos as presas consumidas por quatro espécies de corujas que ocorrem no estado do Rio Grande do Sul, Brasil. As amostras foram obtidas a partir da coleta de uma egagrópila de A. clamator (N = 1) e 12 carcaças de Strigiformes atropelados ( Tyto furcata: N = 5; Megascops sp.: N = 4; Bubo virginianus : N = 2; Asio clamator : N = 1) encontrad...
In this study, we determined the presence of organochlorine pesticides (OCPs) in back feathers from three raptor species, Phalcoboenus chimango, Milvago chimachima and Caracara plancus. Samples were obtained from live animals and ten OCPs were detected: α-HCH, β-HCH and γ-HCH (lindane), heptachlor, heptachlor epoxide, aldrin, endosulfan I, endosulf...
Anthropogenic debris has been affecting fauna in different ways. We investigate the frequency of anthropogenic material in nests of a brown booby (Sula leucogaster) colony in the Saint Peter and Saint Paul Archipelago (SPSPA), Rio Grande do Norte, Brazil in February 2015 and November 2016. The items were classified according to type (threadlike pla...
Crypturellus noctivagus noctivagus is a forest bird endemic to Brazil. In the state of Rio Grande do Sul, the species is considered Critically Endangered, and is known for one relictual population in Pampa Biome. In this study, we estimated the population density of this relictual population using the Distance Sampling method. Samplings occurred fr...
e neotropical species Vanellus chilensis, known as Southern Lapwing, is found in grassland environments, in rural and urban open areas. e species is considered a social Bird, which aggregates in pairs or small groups during the breeding period, in austral spring and summer. During the reproductive period, the cooperative breeding behavior is common...
Pollutants in Antarctic ecosystems are largely attributed to long range atmospheric transport. However, previous studies confirmed seabird colonies as relevant secondary sources of organic and inorganic pollutants. When comparing these data, higher trophic level seabird colonies, small and sparse, did not influence results as strongly as lower trop...
Pygmy sperm whales, Kogia breviceps (Kogiidae), are a small cetacean that inhabits Mesopelagic regions near the continental shelf. In this study we present record of plastic ingestion by K. breviceps in Brazil. In August 2010 on the coast of Rio Grande do Sul, a carcass was found showing evidences of interaction with fishing nets. The stomach conte...
The Yellow-legged Tinamou (Crypturellus noctivagus) is a terrestrial forest bird endemic to Brazil. Females and males of the subspecies Crypturellus noctivagus noctivagus are indistinguishable at the naked eye and there is lack of knowledge regarding means to discriminate sexes in the field. We investigated morphometric differences between sexes of...
Resumo: O Biguá (Nannopterum brasilianus; Suliformes, Phalacrocoracidae) é uma ave de hábitos aquáticos continentais e litorâneos, utilizando estes ambientes para reprodução e suprir suas necessidades alimentares. É uma espécie de dieta principalmente piscívora, mas o conhecimento sobre a identificação das espécies que constituem a sua dieta ainda...
The Yellow-legged Tinamou (Crypturellus noctivagus) is a terrestrial forest bird endemic to Brazil currently threatened with extinction. We aimed to update and predict the potential distribution of the species in Brazil. We thus reviewed an array of scientific publications, field reports and a scitizen science database to compile available data on...
The study of systematics in wide-ranging seabirds can be challenging due to the vast geographic scales involved, as well as the possible discordance between molecular, morphological and behavioral data. In the Southern Ocean, macaroni penguins (Eudyptes chrysolophus) are distributed over a circumpolar range including populations in Antarctic and su...
Studies reporting specific aspects of forest tinamous' feeding ecology are still scarce in the scientific literature, and most of the available information report only casual observations. The Crypturellus noctivagus noctivagus (Tinamiformes, Tinamidae) is a forest bird endemic to Brazil, which occurs from southern Bahia to Rio Grande do Sul. In th...
Coronaviruses are single-stranded positive-sense RNA viruses associated with important avian diseases. Their relatively high rates of mutation and recombination frequencies allow them to adapt to new hosts and ecological niches. Although Brazil has 18% of global avian species diversity, studies regarding the presence of avian viral diseases in wild...
The life history of a species can be considered the main source of information about it, parameters such as incubation period, number of eggs and chicks, may represent the aptitude of individuals in relation to the environment, modified or not. Thus information from the reproductive success of a species allows evaluating the relationship of individ...
Plastic has become abundant in the oceans and proved to be a threat to marine and coastal fauna. In this study, we present the first record of synthetic debris ingested by the shorebird American Oystercatcher (Haematopus palliatus) in Brazil. We collected 24 stomach contents from October 2007 to October 2015 and 58% were juveniles. Synthetic materi...
Since at least the middle-Miocene, the Antarctic Polar Front (APF) and the Subtropical Front (STF) appear to have been the main drivers of diversification of marine biota in the Southern Ocean. However, highly migratory marine birds and mammals challenge this paradigm and the importance of oceanographic barriers. Eudyptes penguins range from the An...
Despite typically not being taken into account (usually in favour of the ‘global distillation’ process), the input of persistent organic pollutants (POPs) through biological activities can be indeed relevant at the local scale in terrestrial polar environments when seabird colonies are considered. Seabirds can bioaccumulate and biomagnify POPs, gat...
Literature reports that body size can be associated with latitudinal distribution, for instance larger animals inhabit higher latitudes and colder habitats. This rule can be applied for species and populations within a species. The potential influence of body size on non-breeding distribution and habitat use at the intra-population level was invest...
Correction to: BMC Evolutionary Biology (2018) 18:90 https://doi.org/10.1186/s12862-018-1207-0 .
Background:
Historical factors, demography, reproduction and dispersal are crucial in determining the genetic structure of seabirds. In the Antarctic marine environment, penguins are a major component of the avian biomass, dominant predators and important bioindicators of ecological change. Populations of chinstrap penguins have decreased in nearl...
This dataset contains in a zipfile the shapefiles for the seabird breeding colonies at Stinker Point (Elephant Island, Maritime Antarctic Peninsula), the elevation of Stinker Point and the Elephant Island contour. All shapefiles are projected in WGS 1984 World Mercator projected coordinate system.
Plumage aberrations are rare in penguin species. Tracking their occurrence is helpful to understand the effects of these phenotypes on the life history of penguins, especially on mating, breeding, and foraging success. We registered a brown Adélie Penguin Pygoscelis adeliae at Turret Point, King George Island, Maritime Antarctica, during the middle...
Available information about seabird breeding population trends on Stinker Point (Elephant Island, Maritime Antarctic Peninsula) is outdated by decades. This study reports current numbers of breeding species, and evaluates population trends over 28 years. We counted breeding pairs of seabirds along all ice-free areas on Stinker Point during two dist...
Seabirds can use merchant, research and/or fishery vessels as a refuge to avoid extreme environmental conditions at sea during their migration seasons. Here we report the visualization of six individuals of the Snowy Sheathbill (Chionis albus; Charadriiformes, Chionidae) landed on a ship for about twenty-three hours in the Drake Passage, during its...
Global distillation is classically pointed as the biggest responsible for contaminant inputs in Polar ecosystems. Mercury (Hg) and other trace elements (TEs) also present natural sources, whereas the biologically mediated input is typically ignored. However, bioaccumulation and biomagnification combined with the fact that seabirds gather in large n...
