Population structure of Oncholaimus cobbi (Nematoda: Oncholaimidae) in a tropical tidal flat

2003 ◽  
Vol 83 (5) ◽  
pp. 903-904 ◽  
Author(s):  
A.M. Esteves ◽  
T.F. Maria ◽  
A.P. Wandeness
Keyword(s):  
Population Structure ◽  
Population Density ◽  
Tidal Flat ◽  
Rio De Janeiro ◽  
Brazilian Coast ◽  
Sepetiba Bay ◽  
Tropical Tidal Flat

Oncholaimus cobbi was described from the Brazilian coast. The area studied, Coroa Grande, is located in Sepetiba Bay, State of Rio de Janeiro, Brazil. Sampling was carried out monthly, from May 1998 through April 1999. Most of the population was represented by adults, of which non-ovigerous females were the most abundant category. The species reached its highest population density during the warmest months, and the highest densities of males and ovigerous females were seen in February 1999.

scholarly journals Population structure of Comesoma arenae Gerlach (Nematoda, Comesomatidae) in a Brazilian tropical tidalflat, Rio de Janeiro, Brazil

2004 ◽  
Vol 21 (4) ◽  
pp. 775-777 ◽  
Author(s):  
André Morgado Esteves ◽  
Tatiana Fabricio Maria ◽  
Adriane Pereira Wandeness
Keyword(s):  
Population Structure ◽  
Rio De Janeiro ◽  
Population Densities ◽  
Sepetiba Bay ◽  
One Year

The objective is to describe the population structure of Comesoma arenae Gerlach, 1956 during a one-year period. The area studied, Coroa Grande, is located in Sepetiba Bay, State of Rio de Janeiro, Brazil. Sampling was carried out monthly, from May 1998 through April 1999. Most individuals in the population were adults, of which non-ovigerous females were the most abundant. The species showed its highest population densities during the colder months.

scholarly journals Community ecology of the metazoan parasites of the Atlantic thread herring, Opisthonema oglinum (Lesueur, 1818) (Actinopterygii: Clupeidae) from the Sepetiba Bay, Rio de Janeiro, Brazil

2020 ◽  
Author(s):  
L. Chaves ◽  
F. Paschoal
Keyword(s):  
Rio De Janeiro ◽  
Parasite Species ◽  
Host Record ◽  
Southeastern Brazil ◽  
Brazilian Coast ◽  
New Host ◽  
Metazoan Parasites ◽  
Sepetiba Bay ◽  
Total Length ◽  
The Mean

Abstract This study aimed to evaluate the parasitic fauna of Opisthonema oglinum (Lesueur, 1818) from Southeastern Brazil. Between September 2017 and March 2018, a total of 100 specimens of O. oglinum from the Sepetiba Bay, Rio de Janeiro, Brazil (22°54'S, 43°34'W) were examined. Ninety one specimens of O. oglinum were parasitized by at least one species of metazoan with a mean of 5.84 ± 7.98 parasites/fish. Seven species were collected: 2 digeneans, 2 monogeneans, 2 copepods and 1 nematode. The digenean Parahemiurus merus (Linton) was the most abundant and dominant species, representing 43% of metazoan parasites collected. The parasite species richness was positively correlated with the total length of the hosts. Only Neobomolochus elongatus Cressey showed a positive correlation between host's total length and parasite prevalence. The mean parasite species diversity was not correlated with host's total length, but significant differences among the mean parasite diversity between males and females was observed. Opisthonema oglinum represents a new host record for Caligus mutabilis Wilson, Hysterothylacium sp. and Cribomazocraes travassosi Santos and Kohn. The copepod N. elongatus is recorded for the first time on the Brazilian coast.

Organochlorine compound accumulation in delphinids from Rio de Janeiro State, southeastern Brazilian coast

2012 ◽  
Vol 433 ◽  
pp. 123-131 ◽  
Author(s):  
José Lailson-Brito ◽  
Paulo R. Dorneles ◽  
Cláudio E. Azevedo-Silva ◽  
Tatiana L. Bisi ◽  
Lara G. Vidal ◽  
...  
Keyword(s):  
Rio De Janeiro ◽  
Organochlorine Compound ◽  
Brazilian Coast ◽  
Janeiro State

scholarly journals Sea-level fluctuations and coastal evolution in the state of Rio de Janeiro, southeastern Brazil

2014 ◽  
Vol 86 (2) ◽  
pp. 671-683 ◽  
Author(s):  
JOÃO WAGNER A. CASTRO ◽  
KENITIRO SUGUIO ◽  
JOSÉ C.S. SEOANE ◽  
ALINE M. DA CUNHA ◽  
FABIO F. DIAS
Keyword(s):  
Sea Level ◽  
Rio De Janeiro ◽  
Atlantic Coast ◽  
Southeastern Brazil ◽  
Brazilian Coast ◽  
14C Dating ◽  
Relative Sea Level ◽  
Coastal Evolution ◽  
The Holocene ◽  
First Time

The present paper aims to investigate the relative sea-level and the coastal evolution during the Holocene in the Rio de Janeiro coastline, based on geological and biological indicators. Using topographic survey, excavation and coring, and 14C dating of these coastal deposits and beachrocks outcrops, we have reconstructed a sea-level curve for the Holocene. For the first time on the Brazilian coast it was identified a negative record of relative sea-level during Late Pleistocene and Early Holocene transition. After the transition, a relatively rapid increase of sea-level began. At approximately at 8500 cal yr BP, the sea-level was 0.5 m below the current level, was overtaken for the first time in the Holocene, at approximately 7500 cal yr BP. The maximum level of +2.5 m was reached between 4770 and 4490 cal yr BP. At the point of maximum transgression, the sea-level began a general behavior of lowering until the present. These results confirm other data already obtained elsewhere along the Atlantic coast of South America. The results of this study are consistent with previous researches and they help to refine the Holocene sea-level record along the Brazilian coast.

scholarly journals LAONICE BRANCHIATA, A NEW SPECIES OF SPIONIDAE (ANNELIDA; POLYCHAETA) FROM THE SOUTHEASTERN BRAZILIAN COAST

1986 ◽  
Vol 1 (3) ◽  
Author(s):  
Edmundo Ferraz Nonato ◽  
Germán Armando Bolívar ◽  
Paulo Da Cunha Lana
Keyword(s):  
New Species ◽  
Rio De Janeiro ◽  
Sao Paulo ◽  
Shallow Waters ◽  
Brazilian Coast ◽  
São Paulo ◽  
Se Brazil ◽  
A New Species

Laonice branchiata, a new spionid polychaete, is described based on material collected in shallow waters of estuarine and shelf environments off the States of Paraná, São Paulo and Rio de Janeiro (SE Brazil).(Laonice branchiata, uma nova espécie de Spionidae da costa sudeste brasileira). Laonice branchiata, uma nova espécie de poliqueta da família Spionidae, é descrita a partir de material coletado em ambientes estuarinos e de plataforma ao longo dos estados do Paraná, São Paulo e Rio de Janeiro (costa sudestedo Brasil).

scholarly journals RELATIVE SEA LEVEL RISE EFFECTS AT THE MARAMBAIA BARRIER ISLAND AND GUARATIBA MANGROVE: SEPETIBA BAY (SE BRAZIL)

2019 ◽  
Vol 4 (3) ◽  
pp. 249-262
Author(s):  
Carolina Santana da Costa Santos ◽  
Fábio Ferreira Dias ◽  
Barbara Franz ◽  
Paulo Roberto Alves dos Santos ◽  
Thalita Da Fonseca Rodrigues ◽  
...  
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Rio De Janeiro ◽  
Central Area ◽  
Barrier Island ◽  
Aerial Images ◽  
Relative Sea Level ◽  
Sepetiba Bay ◽  
Se Brazil ◽  
Relative Sea Level Rise

Human activities change coastal ecosystems, but they are also altered by natural causes, such as the relative sea level rise. This work analyzes the influence of changes of the relative sea level at Guaratiba mangrove and Marambaia barrier island, in Sepetiba Bay, Rio de Janeiro State (SE, Brazil), based on photo interpretation. The objective of this study is to analyze the morphodynamics of Marambaia coastal sand barrier, estimating the rate of the shoreline change by mapping the vegetation line position, variations of dune extension and overwash processes. The Marambaia barrier island and Guaratiba mangrove are highly vulnerable to sea level rise. The mangrove is suffering pressure from the relative sea level rising and urbanization. The mangrove migration towards the continent is evident through the analyses of aerial images from 1976 to 2005. If the current erosion process continues in the Marambaia barrier island, a disruption in the central area of the sand bank should occur, which will create a new communication between Sepetiba Bay and the ocean. This break will change the present internal circulation of the bay and modify the ecosystems. Also considering the anthropic pressure, if the Marambaia barrier island breaks, the mangrove area will be reduced or disappear. The sea level rise and the sedimentation rate lowering will result in the migration and marine transgression in Marambaia barrier island and Guaratiba mangrove. EFEITOS DO AUMENTO RELATIVO DO NÍVEL DO MAR NA ILHA BARREIRA DE MARAMBAIA E DO MANGUEZAL DE GUARATIBA: BAÍA DE SEPETIBA (SE BRASIL) ResumoAs atividades humanas alteram os ecossistemas costeiros, mas estes também são alterados por causas naturais, como por exemplo, o aumento relativo do nível do mar. Este trabalho analisa a influência das mudanças relativas do nível do mar no manguezal de Guaratiba e na ilha barreira de Marambaia, na Baía de Sepetiba, localizada no Estado do Rio de Janeiro (SE, Brasil), com base na fotointerpretação. O objetivo deste estudo é analisar a morfodinâmica da barreira costeira de areia de Marambaia, estimando a taxa de variação da linha de costa, mapeando a posição da linha de vegetação, variações da extensão dunar e os processos de overwash. A ilha barreira de Marambaia e o manguezal de Guaratiba são altamente vulneráveis à elevação do nível do mar. O manguezal está sofrendo pressão do aumento relativo do nível do mar e da urbanização. A migração do manguezal para o continente é evidente através da análise de imagens aéreas de 1976 a 2005. Se continuar o processo atual de erosão na ilha barreira de Marambaia, deverá ocorrer uma ruptura na área central do banco de areia, o que dará origem a uma nova comunicação entre a Baía de Sepetiba e a oceano. Essa quebra vai mudar a atual circulação interna da baía e modificar os ecossistemas. Se a ilha barreira de Marambaia se romper, a área de manguezal irá ser reduzida ou desaparecerá. Este efeito é tanto mais provável se for considerada também a pressão antrópica. A elevação do nível do mar e a redução da taxa de sedimentação resultarão na migração e transgressão marinha na barreira de Marambaia e no mangue de Guaratiba. Palavras-chave: Ilha da Barreira. Manguezal. Elevação do nível relativo do mar. Erosão costeira. Galgamento oceânico.

scholarly journals Haplotype distribution and connectivity of the white sea urchin Tripneustes ventricosus across the Brazilian biogeographic province

2016 ◽  
Author(s):  
Wander O Godinho ◽  
Rodrigo Maggioni ◽  
Ana L Lacerda ◽  
Tito M C Lotufo
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Sea Urchin ◽  
White Sea ◽  
Sea Urchins ◽  
Marine Ecosystems ◽  
Brazilian Coast ◽  
The White Sea ◽  
Biogeographic Province ◽  
Fernando De Noronha

Sea urchins play important roles in marine ecosystems as key herbivores and some species have wide geographic range. The Atlantic white sea urchin Tripneustes ventricosus is abundant in many rock reefs of the eastern and western Atlantic, and may be found in high densities in Atolls and Archipelagos. Despite the importance of sea urchins in insular ecosystems, there is no study evaluating the genetic structure and the origin of the white sea urchin in isolated ecosystems. Such information is crucial to understand the connectivity and genetic diversity of these populations from the tropical Atlantic provinces. To evaluate the origin of the white sea urchin in Fernando de Noronha Archipelago and the genetic features of this population, we conducted studies on the population structure of the white sea urchin using mitochondrial DNA (COI), in two regions within the Brazilian biogeographic province and compared with other regions in the Atlantic. The white sea urchin from Fernando de Noronha was found to be genetically distinct, with FST ranging from 0.3 to 0.9 from other populations in Atlantic. The sharing of haplotypes between the Brazilian coast and the archipelago suggests that insular species derived from the Brazilian coast, rather than the East Atlantic. Moreover, all other Atlantic populations were genetically isolated, with low genetic diversity being a common characteristic among them (ranging from 0.0011 to 0.0022). The low connectivity found within populations might be related to the presence of soft barriers among the Brazilian biogeographic province. The low nucleotide diversity may also suggest that T. ventricosus may have undergone bottleneck processes at some stage of their evolution. This study has important implications on the geographic distribution, population structure and gene flow of the white sea urchin among the Atlantic regions. Further studies should evaluate the biological and ecological aspects of the species in both insular and continental marine ecosystems.

scholarly journals Metal bioavailability and distribution in the fish community in a tropical estuary, Sepetiba Bay, Rio de Janeiro, Brazil

2021 ◽  
Vol 35 (1) ◽  
pp. 17-38
Author(s):  
Vinícius Kütter ◽  
Vanessa Moreira ◽  
Mateus Kütter ◽  
Emmanoel Silva-Filho ◽  
Eduardo Marques ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Suspended Particulate Matter ◽  
Fish Species ◽  
Fish Muscle ◽  
Human Consumption ◽  
Brazilian Coast ◽  
Industrial Emissions ◽  
Sepetiba Bay ◽  
Suspended Particulate ◽  
Citharichthys Spilopterus

Sepetiba Bay has a wealth of fish species (total 148) as well as a vast area of mangroves and numerous rocky islands, which are important sites of reproduction for marine life. This peculiar environment of the Brazilian coast hosts one of the most important industrial centres of south-eastern Brazil. This site has been impacted for decades by the release of industrial emissions and effluents with high metal loads by the steel industry. The ranges of metal concentrations in fish muscle from the species Micropogonias furnieri, Genidens genidens, Cathorops spixii, Notarius grandicassis, Diapterus rhombeus, Selene vomer, Prionotus punctatus, Citharichthys spilopterus, Achirus lineatus, Trinectes paulistanus, Symphurus tessellatus and Hypanus guttatus were measured (Al: 0.02-555.9 µg g-1 d.w., As: 0.0002-20.1 µg g-1 d.w., Cd: <0.0002-0.2 µg g-1 d.w., Cu: 0.2-2.3 µg g-1 d.w., Fe: <0.02-244.9 µg g-1 d.w., Zn: 0.5-227.3 µg g-1 d.w. and Pb: <0.001-1.3 µg g-1 d.w.). The Kruskal-Wallis test revealed significant differences (p<0.05) in the As, Cu, Fe, Pb and Zn contents among fish species. The monitoring of suspended particulate matter during dredging operation revealed the mean metal values for Al (6059±6268 µg g-1), Cd (0.2±0.5 µg g-1), Cu (29±29 µg g-1), Zn (332±892 µg g-1), and Pb (52±70 µg g-1). The results of bioaccumulation in fish calculated from the bioavailable sediment fractions and suspended particulate matter showed lower values than those in fish muscle. Arsenic was found at levels above the maximum limit for human consumption according to Brazilian legislation. However, the estimated probability and risk of metal intake via fish consumption showed that the consumption of all species presented low risk.

Taxonomy of Petrosiidae Van Soest, 1980 (Haplosclerida, Porifera) from Brazil

Zootaxa ◽  
2021 ◽  
Vol 5004 (2) ◽  
pp. 251-287
Author(s):  
LÍVIA ROCHA ◽  
FERNANDO MORAES ◽  
SULA SALANI ◽  
EDUARDO HAJDU
Keyword(s):  
New Species ◽  
Rio De Janeiro ◽  
Rio Grande ◽  
Oceanic Islands ◽  
Identification Key ◽  
Brazilian Coast ◽  
Rio Grande Do Sul ◽  
Two New Species ◽  
Xestospongia Muta

Petrosiidae (Haplosclerida, Demospongiae) is characterized by the hard and friable consistency, and an isotropic reticulated skeleton of oxeas/ strongyles. The Brazilian coast and oceanic islands harbor three out of four known genera of Petrosiidae: Neopetrosia de Laubenfels, 1949; Petrosia (Petrosia) Vosmaer, 1885 and Xestospongia de Laubenfels, 1932. A taxonomic survey of samples from several expeditions housed at the Porifera Collection of Museu Nacional, Universidade Federal do Rio de Janeiro, with additional comparative materials obtained from the Museu de Ciências Naturais, Fundação Zoobotânica do Rio Grande do Sul, and Universidade Federal de Pernambuco enabled the description of two new species: P. (P.) revizee sp. nov. and X. dorigo sp. nov. We also recorded a range extention for Neopetrosia proxima and Xestospongia muta, and Xestospongia grayi was synonymized with X. muta. Other species reported from the country are diagnosed, and an identification key for Petrosiidae from Brazil is provided.

scholarly journals New records of Bentharca asperula (Dall, 1881) (Mollusca, Bivalvia, Arcidae) from Brazil

2009 ◽  
Vol 9 (4) ◽  
pp. 281-283 ◽  
Author(s):  
Flávio Dias Passos ◽  
Adolpho Birman
Keyword(s):  
Atlantic Ocean ◽  
Rio De Janeiro ◽  
New Records ◽  
Sao Paulo ◽  
Brazilian Coast ◽  
São Paulo ◽  
Wide Spread ◽  
Hinge Line ◽  
Deep Waters

Specimens of Bentharca asperula (Dall, 1881) were obtained from deep waters of the coasts of the Rio de Janeiro and São Paulo States, and their shells described, illustrated and compared with descriptions and illustrations obtained from the literature. This species has a small strongly inequilateral shell, trapezoidal in outline and expanded ventro-posteriorly; their umbos are placed at about 1/3 of the anterior length of their straight hinge line. The external sculpture consists of irregular spaced concentric ridges, intercepted by fine radiating striae; the periostracum is hairy, forming a cover as a thatch. Hinge teeth are small, disposed in two series interrupted by the ligament. With this finding of living specimens from the Bacia de Campos, the distribution of B. asperula can now be extended in the Brazilian coast, confirming its wide spread in the Atlantic Ocean.

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