Roberta Aguiar dos Santos

Roberta Aguiar dos Santos
Instituto Chico Mendes de Conservação da Biodiversidade | ICMBio · Centro Nacional de Pesquisa e Conservação da Biodiversidade Marinha do Sudeste e Sul-CEPSUL

Doctor of Oceanography

About

95
Publications
24,325
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1,405
Citations
Citations since 2017
33 Research Items
648 Citations
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2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
Introduction
Environmental Analyst of ICMBio. Develops research about the distribution and abundance of marine fish and invertebrates as well as ecology and populational dynamics of cephalopods. Assessment of the conservation status of marine species of brazilian fauna.
Additional affiliations
September 2013 - March 2020
Instituto Chico Mendes de Conservação da Biodiversidade
Position
  • Manager
Description
  • Besides coordinator of the research and conservation center, also Marine Biodiversity Monitoring; Extinction Risk Assessment; National Action Plans for endangered marine fauna; marine biodiversity research.
May 2011 - September 2020
Chico Mendes Institute of Biodiversity Conservation - Instituto Chico Mendes de Conservação da Biodiversidade
Position
  • Extinction Risk Assessment of Brazilian marine Actinopterygii Condrichthyes and Cephalopoda
April 2004 - present
Chico Mendes Institute of Biodiversity Conservation - Instituto Chico Mendes de Conservação da Biodiversidade
Position
  • Environmental Analist
Description
  • Marine Biodiversity Monitoring; Extinction Risk Assessment; National Action Plans for endangered marine fauna (PAN Tubarões - Sharks and Rays; PAN Lagoas do Sul - Lagoon Systems of Southern Brazil; Coordinator of the PAN Corais - Coraline Environments); marine biodiversity research
Education
July 1992 - June 1999
March 1988 - June 1992
March 1985 - December 1988

Publications

Publications (95)
Article
Full-text available
Monitoramento de pescarias industriais de arrasto-de-fundo por meio de observadores científicos na Plataforma Continental e Talude do sul do Brasil entre 2015 e 2017 DOCUMENTO TÉCNICO Revista CEPSUL-Biodiversidade e Conservação Marinha, 10: e2021007 Resumo. Foram monitorados, entre 2015 e 2017, 225 dias de mar e 775 lances nas pescari-as industriai...
Article
Full-text available
Foram monitorados, entre 2015 e 2017, 225 dias de mar e 775 lances nas pescarias industriais de arrasto-de-parelha, arrasto-duplo para linguado, arrasto-duplo para abrótea/merluza e arrasto-simples para cabrinha, a partir do embarque de observadores científicos do CEPSUL/ICMBio no sul do Brasil, cujo objetivo foi obter informações sobre as operaçõe...
Technical Report
Full-text available
Contributions for the strategic planning of the conservation of the Carcharias taurus (sand tiger shark) in the Southwestern Atlantic. Este es el informe de dos talleres sobre la conservación del tiburón Carcharias taurus (sand tiger shark, mangona, escaladrún, sarda), organizados en el año de 2020, para una planificación colectiva de acciones de...
Technical Report
Full-text available
Este documento resume el trabajo de dos talleres sobre la conservación del tiburón Carcharias taurus. Se trata de una especie costera, de amplia distribución mundial. En el Atlántico Sudoccidental (ASO), se distribuye desde el norte de la Patagonia Argentina, hasta el sudeste de Brasil, incluyendo aguas uruguayas. En la Argentina, se lo conoce com...
Article
The franciscana dolphin ( Pontoporia blainvillei ) is a coastal dolphin endemic to the western South Atlantic Ocean. The dolphin is listed as vulnerable in the IUCN Red List, with incidental catches in gillnet fisheries the greatest conservation concern for this species. Insights into the feeding habits of this dolphin are essential to understand i...
Article
Full-text available
A avaliação do estado de conservação de espécies da fauna brasileira, atribuição do Instituto Chico Mendes de Conservação da Biodiversidade (ICMBio), tem representado um esforço imenso e qualificado, agregando centenas de pesquisadores de diferentes instituições. Entretanto, neste processo, ainda é um desafio o envolvimento do conhecimento ecológic...
Technical Report
Full-text available
Results of the 2017 IUCN Regional Red List Workshop for Species of the Patagonian Sea: CHONDRICHTHYANS.
Technical Report
Full-text available
Results of the 2017 IUCN Regional Red List Workshop for Species of the Patagonian Sea: CHONDRICHTHYANS, with 35 species of rays, skates and sharks listed: Amblyraja doellojuradoi; Atlantoraja castelnaui; Atlantoraja cyclophora; Atlantoraja platana; Bathyraja albomaculata; Bathyraja brachyurops; Bathyraja cousseauae; Bathyraja griseocauda; Bathyraja...
Article
Full-text available
The Magellanic Penguin Spheniscus magellanicus is one of the main seabird predators in the western South Atlantic. This species presents an opportunist feeding behaviour and its diet, as well as its parasite fauna, varies geographically depending on available prey and intermediate hosts. Despite thousands of Magellanic Penguins being found dead eve...
Presentation
Full-text available
Apresentação de trabalho por bolsista PIBIC no XI Encontro de Iniciação Científica do Instituto Chico Mendes de Conservação da Biodiversidade, sobre a avaliação do risco de extinção de Actinopterygii marinhos, com especial referência à espécies ameaçadas de extinção e com dados insuficientes, tratando de ameaças,, distribuição e medidas de conserva...
Article
Marine mammals and humans are apex predators and both may compete for fish in ecosystems under continuous fishing pressure. We assessed the degree of trophic overlap between prey species found in the diet of 5 marine mammals (39 specimens of sea lion Otaria flavescens, 61 fur seals Arctocephalus australis, 76 franciscana dolphins Pontoporia blainvi...
Book
Full-text available
Neste manual, que é um produto do Programa de Monitoramento da biodiversidade do ICMBio - Programa Monitora, são dadas orientações para observadores científicos a bordo de embarcações para coleta de dados e informações de pescarias de arrasto, desde localização, até uso de petrechos e da operação da pesca, bem como das espécies capturadas e suas ca...
Book
Full-text available
Neste manual, que é um produto do Programa de Monitoramento da biodiversidade do ICMBio - Programa Monitora, são dadas orientações para observadores científicos a bordo de embarcações para coleta de dados e informações de pescarias de emalhe, desde localização, até uso de petrechos e da operação da pesca, bem como das espécies capturadas e suas car...
Book
Full-text available
Neste manual, que é um produto do Programa de Monitoramento da biodiversidade do ICMBio - Programa Monitora, são dadas orientações para observadores científicos a bordo de embarcações para coleta de dados e informações de pescarias de espinhel, desde localização, até uso de petrechos e da operação da pesca, bem como das espécies capturadas e suas c...
Data
Discussion about de red list of brazilian fishes and aquatic invertebrates. Implications on fisheries management.
Article
Full-text available
The Atlantic Petrel Pterodroma incerta breeds during the austral winter and mainly on Gough Island, remaining near the colonies during the breeding season and wintering on the South Atlantic Subtropical Convergence waters. Until now, all information about the diet of this species has been obtained during the breeding season, but these birds may tak...
Chapter
Full-text available
Megalops atlanticus extinction risk assessment in Brazil
Chapter
Full-text available
Extinction risk assessment of the teleost fish Lopholatilus villarii, peixe-batata, tile fish, in Brazil, from the ICMBio (Brazilan Government) process (2008 to 2014).
Chapter
Full-text available
Extinction risk assessment of Squatina argentina, Squatina guggenheim and Squatina occulta in Brazil.
Chapter
Full-text available
Extinction risk assessment of Zapteryx brevirostris in Brazil
Chapter
Full-text available
Extinction risk assessment of the mangona, sand tiger shark Carcharias taurus, in Brazil, from the ICMBio (Brazilan Government) process (2008 to 2014).
Chapter
Full-text available
Conservation status and extinction risk assessment of guitarfish Pseudobados horkelii in Brazil (2014
Article
The present study reports the occurrence of the bearded brotula Brotula barbata in four different localities off southern Brazil. These records extend the species’ known distribution limit southwards, beyond Rio de Janeiro, to the state of Rio Grande do Sul (30° 50′ S). Morphometric and meristic data for the specimens reported herein are provided a...
Article
The stomach content of a male, immature dwarf minke whale ( Balaenoptera acutorostrata subsp.) stranded in September of 2008 in southern Brazil revealed a large consumption of the Argentine shortfin squid ( Illex argentinus ), probably in multiple feeding events. Stable isotopes signals from kidney and liver samples of the whale are consistent with...
Article
Full-text available
Record of the invasive swimming crab Charybdis hellerii (A. Milne-Edwards, 1867) (Decapoda, Portunidade) in the Environmental Protection Area of Anhatomirim, Santa Catarina, Brazil. Charybdis hellerii (A. Milne-Edwards, 1867) is a species of Indo-Pacific native swimming crab, containing its extended distribution after larval introduction and disper...
Conference Paper
Full-text available
Longe de ser uma solução aos problemas derivados da pesca, a Portaria MMA n° 445/2014 contextualiza uma realidade do país, onde se tem um cenário marinho degradado, junto da emersão de questões fundamentais ao gerenciamento da pesca. De um lado a pressão do setor pesqueiro junto aos órgãos ambientais, para extinguir a Portaria, e do outro as conseq...
Conference Paper
Full-text available
As modalidades de pesca de arrasto no sudeste e sul no Brasil capturam em sua maioria indivíduos de peixe-batata antes que estes atinjam o tamanho da primeira maturação. Além do colapso da pescaria, essa remoção contínua de jovens da população pode levar a espécie à extinção. Medidas que limitem a atuação da frota de arrasto sobre os peixes demersa...
Conference Paper
Full-text available
The future of marine biodiversity and economically viable fisheries requires sustainable use of our natural resources (WORM et al. 2009; GAINES et al. 2010). However, there is no question that illegal, unreported and unregulated fishing (i.e IUU fishing) has severely reduced many marine populations worldwide (PAULY 1998; WORM et al. 2009). The Sout...
Article
Full-text available
Seabirds breeding in tropical environments experience high energetic demands, when foraging in an oligotrophic environment. The globally threatened Trindade petrel Pterodroma arminjoniana has its largest colony in Trindade Island (20°30′S–29°19′W) inside the oligotrophic South Atlantic Subtropical Gyre. Diet sampling methods, geolocator tracking an...
Article
Full-text available
The stomach contents of 21 stranded bottlenose dolphins were collected by a marine mammal research team (Grupo de Estudos de Mamíferos Aquáticos do Rio Grande do Sul - GEMARS) during systematic beach surveys (mostly monthly) along the central-northern coast of Rio Grande do Sul, southern Brazil, between November 1991 and October 2008. The area surv...
Article
The genus Kogia, which comprises only two extant species, Kogia sima and Kogia breviceps, represents one of the least known groups of cetaceans in the global ocean. In some coastal regions, however, stranding events of these species have been relatively common over the last decades. Stranding provides the opportunity to investigate the biology of t...
Data
Summary statistics of the Generalized Linear Model method for the single effect of each environmental variable on Kogia strandings. Reported are parameter estimates (± standard error) for intercept “α” and slope “β” of each model. Corresponding p-values are p < 0.05 for *, p < 0.01 for **, and p < 0.001 for ***. (DOCX)
Data
Stranding data of genus Kogia along the Brazilian coast. KS = Kogia sima; KB = Kogia breviceps. (DOCX)
Data
Model selection from a series of additive models. The selection is based on the Akaike’s Information Criterion (AIC) and Akaike’s Weights (WAIC). The best models are the one that have the lowest AIC and highest WAIC, here highlighted in bold and with superscript (1). The second and third subsequent most important models according to AIC are indicat...
Chapter
Full-text available
O Plano de Ação Nacional para a Conservação dos Ambientes Coralíneos (PAN Corais) é um documento de pactuação com a sociedade e buscará diminuir pressões na vida marinha da costa brasileira até 2021. Ele foi instituído pela Portaria ICMBio nº 19, com publicação no Diário Oficial da União do dia 9 de março de 2016. Com a coordenação geral do Cepsul/...
Article
Full-text available
A região marinha entre o norte da Ilha de Santa Catarina e o continente, em San-ta Catarina, tem sido considerada pelos órgãos de fiscalização ambiental como uma baía e, portanto, como área de restrição à pesca de arrasto de camarões, de acordo com a Portaria n° 51/83, da extinta Superintendência do Desenvolvimento da Pesca (SUDEPE). Essa Porta-ria...
Article
Full-text available
A primeira lista da fauna brasileira ameaçada de extinção incluía 42 espécies de répteis, aves e mamíferos (IN IBDF 303/1968). Esse número duplicou cinco anos depois, quando 85 espécies, entre elas o primeiro invertebrado terrestre ameaçado no país, integraram a lista seguinte (IN IBDF 3.481/1973; Quadro 1). Passados 16 anos, a lista quase triplico...
Article
Full-text available
Catch data are the most basic information to be collected for managing fisheries everywhere. However, in many regions around the globe, including Brazil, this information is not available in a quality that is satisfactory. The objective of the initiative presented in this paper was to compile a country-wide database of marine commercial catch data...
Article
The Brazilian Minister of the Environment released the new national red lists enumerating 2113 plants and 1173 animals threatened with extinction. Of the 475 aquatic species on the list, 83 are commercially exploited by fisheries, mainly as by-catch. The industrial fisheries sector is now using its political influence to persuade the government to...
Article
South American fur seals (Arctophoca australis) inhabiting the Río de la Plata plume and adjoining areas are known to forage upon a wide range of prey (i.e. pelagic, demersal and benthic species).Since the 1960s, trawlers have operated in the area, targeting primarily demersal and benthic species. Carbon and nitrogen stable isotope ratios from 54 a...
Article
Full-text available
Catch data are the most basic information to be collected for managing fisheries everywhere. However, in many regions around the globe, including Brazil, this information is not available with satisfactory quality. The objective of the initiative described in this paper was to compile a countrywide database of marine commercial catch data in its or...
Article
The stomach contents of juvenile Magellanic penguins, Spheniscus magellanicus, stranded along the Atlantic coast (21–23°S) during the extreme mortality event of 2008 were analysed. The isotopic profiles of this species and their prey in a wintering area are presented to identify trophic relationships and to evaluate whether the prey species recover...
Article
Full-text available
O presente trabalho visa mostrar alguns aspectos da pesca amadora das espécies de robalo Centropomus undecimalis e Centropomus parallelus, na Baía da Babitonga, localizada no norte de Santa Catarina. Para descrição da pescaria e levantamento dos dados do perfil socioeconômico dos pescadores amadores, foram realizadas entrevistas estruturadas e semi...
Article
Full-text available
This study presents new information on feeding habits of Guiana dolphins, Sotalia guianensis, in south-eastern Brazil, together with new regression equations to evaluate the weight and length of fish from otoliths, showing an overview on the knowledge about this species’ diet in this area. Eighteen stomach contents had been analysed and compared to...
Article
Full-text available
The list of Crustacean species from the state of Santa Catarina, southern Brazil, comprises 518 valid species, distributed in 17 orders and 152 families. This amount corresponds to 0.75% of the Crustacea worldwide and about 20% of Brazilian species. The order Decapoda is the most represented, with 280 species. The families of Decapoda with the grea...
Article
Full-text available
This study presents new information on the feeding habits of the Atlantic spotted dolphins, Stenella frontalis, in the Western South Atlantic. Nine stomach contents of S. frontalis incidentally caught in fishing operations conducted by the gillnet fleet based on main harbour of Cananéia (25°00’S; 47°55’W), southeastern Brazil, were analyzed. These...
Article
Full-text available
Between 1995 and 2009 hammerhead sharks were sampled from the landings of the industrial fleets based in the harbours of Itajaí and Navegantes, Santa Catarina State, and Ubatuba, São Paulo State, Brazil. In this case, fishing boats which operated with gill-nets longlines and trawls along the southern Brazilian Economic Exclusive Zone and inter-nati...
Article
Full-text available
The development of demersal fishing in slope areas off southern Brazil (21o - 34o S) accelerated since the year 2000 as a result of commercial operations conducted by national and chartered bottom longliners, potters, gillnetters and trawlers. These operations were continuously monitored by observers as part of scientific research program carried o...
Article
Full-text available
Stomach content analyses were performed in 28 dolphins stranded between 1994 and 2007 on the beaches of Rio de Janeiro State (23°06′S 44°18′W/22°14′S 41°54′W), Brazil, comprising six delphinid species: Stenella frontalis (N = 10), Steno bredanensis (N = 7), Tursiops truncatus (N = 4), Delphinus delphis (N = 5), Lagenodelphis hosei (N = 1) and Stene...
Article
Full-text available
A total of 2.702 skipjack tunas, Katsuwonus pelamis, were sampled from pole-and-line fishing vessel landings in Niterói harbor (Rio de Janeiro State), between January and December 2007. Furcal length (Lf) ranged from 40.1 to 85.6 cm and total weight (Wt) from 1.0 (1st and 2nd trimesters) to 11.3 kg (2nd trimester). Highest length and weight means w...
Chapter
Full-text available
Os cefalópodes pelágicos encontrados em torno do Arquipélago de São Pedro e São Paulo, localizado na cadeia Meso-Atlântica distante cerca de 1.100 km da costa do Brasil, foram identificados a partir de conteúdos estomacais de peixes pelágicos capturados por barcos pesqueiros comerciais em torno destas ilhas. Bicos ou partes digeridas de 267 cefalóp...
Chapter
Full-text available
The singular location of the Saint Peter and Saint Paul Archipelago, plus the facility of collection and observation of the cephalopods, turned this region an important site to study these animals. The pelagic cephalopods around this archipelago were identified from the stomach contents of pelagic fishes caught from commercial fishing boats around...
Article
Full-text available
The relative abundance and fishing potential of the commercially valuable fishes and cephalopods with marketable size was assessed using two seasonal bottom trawl surveys performed in 2001 and 2002 on the outer shelf and upper slope (100-600 m depth) off the coast of southern Brazil. These surveys were part of REVIZEE, a national program designed t...
Article
Full-text available
Se evaluó la abundancia relativa y el potencial pesquero de peces y cefalópodos de especies y tamaños de valor comercial en dos muestreos estacionales con redes de arrastre de fondo realizados en los años 2001 y 2002 sobre la plataforma externa y talud superior, 100 a 600 m de profundidad, a lo largo del ex-tremo sur de la costa brasilera, como par...
Article
Full-text available
The relative abundance and fishing potential of the commercially valuable fishes and cephalopods with marketable size was assessed using two seasonal bottom trawl surveys performed in 2001 and 2002 on the outer shelf and upper slope (100-600 m depth) off the coast of southern Brazil. These surveys were part of REVIZEE, a national program designed t...
Book
Full-text available
This document reports the results of the bottom trawl surveys performed along the outer shelf and upper slope of Southeastern and Southern Brazil covering a total area of 135000 km2, during cold and warm seasons as part of the wider scope REVIZEE Program (Living Resources of the Exclusive Economic Zone).The surveys were from Chuí - RS (34° 40’S) to...
Chapter
This study presents new information on feeding habits of Guiana dolphins, Sotalia guianensis, in southeastern Brazil, together with new regression equations to evaluate the weight and length of fish from otoliths, showing an overview on the knowledge about this species' diet in this area. Eighteen stomach contents had been analysed and compared to...
Article
Regarding Brazilian coast, industrial and urban developments are concentrated along Central South Brazil Bight. Samples from inshore and offshore species from the concerned area were analyzed, comprising 24 cetaceans (9 species) and 32 squids (2 species). Cadmium was determined by GFAAS and our results were in agreement with certified values (DOLT-...