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Registros recuperados: 24
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A report on the marine cladoceran Evadne spinifera Müller (Crustacea, Branchiopoda) in Guanabara Bay, Rio de Janeiro, Brazil Zoologia
Marazzo,Andrea; Valentin,Jean L..
This note relates the occurrence of Evadne spinifera Müller, 1867 (Crustacea, Branchiopoda) in Guanabara Bay, Rio de Janeiro State, Brazil. The samples were obtained by vertical tows with a 200µm mesh-size conical net at different times over a four day period in September, 1995. Evadne spinifera densities was always low.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cladocera; Evadne spinifera; Zooplankton; Guanabara Bay; Brazil.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000400017
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Alterações na composição florística das algas da Praia de Boa Viagem (Niterói, RJ) Rev. Bras. Bot.
TAOUIL,ANDRÉ; YONESHIGUE-VALENTIN,YOCIE.
A Baía de Guanabara no decorrer da ocupação de suas margens sofreu uma continua degradação, levando-a a grandes modificações em seu entorno e a inúmeros danos ambientais. Além de uma significativa alteração paisagística, ocorreu também uma queda na qualidade de suas águas, devido ao lançamento de grande quantidade de efluentes não tratados (domésticos e industriais). Este trabalho teve como objetivo inventariar a flora algácea da praia de Boa Viagem (Niterói, RJ), compará-la com levantamentos realizados há três décadas. Os resultados mostraram desaparecimento de 30 táxons (49%) outrora existentes no início da década de 70 e o aparecimento de 14 espécies (23%). A flora atual é dominada por Ulva fasciata Delile e Enteromorpha compressa (L.) Nees, espécies...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Benthos; Flora; Guanabara Bay; Organic pollution; Seaweeds.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002012000004
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Benthic foraminifera distribution in high polluted sediments from Niterói Harbor (Guanabara Bay), Rio de Janeiro, Brazil Anais da ABC (AABC)
Vilela,Claudia G.; Batista,Daniele S.; Batista-Neto,José A.; Crapez,Mirian; Mcallister,John J..
Dockyards and harbors are recognized as being important locations where sediment-associated pollutants can accumulate, which constitutes an environmental risk to aquatic life due to potential uptake and accumulation of heavy metals in the biota. The aim of this paper is to assess the concentrations and the effects of some heavy metals in the benthic foraminifera assemblage in Niterói Harbor. Low concentrations in the benthic foraminifera as well as the dominance of indicative species such as Ammonia tepida, Buliminella elegantissima and Bolivina lowmani can be associated with an environment under stress. In addition, the occurrence of test abnormalities among foraminifera may represent a useful biomarker for evaluating long-term environmental impacts in a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Benthic foraminifera; Guanabara Bay; Pollution; Heavy-metals.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000100014
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Diel changes in embryonic maturation in two species of marine cladocerans in Guanabara Bay, Rio de Janeiro, Brazil Zoologia
Marazzo,Andrea; Valentin,Jean L..
Two species of marine cladocerans, Penilia avirostris Dana, 1852 and Evadne tergestina Claus, 1877 were collected in thirteen samples at a fixed station in Guanabara Bay, Rio de Janeiro (30-meter depth) by means of vertical tows with a 200 µm mesh size net at different times from September 12th to 15th, 1995. The parthenogenetic females of Evadne tergestina bore mature embryos (with pigmented eye) only in the samples collected at night, whereas Penilia avirostris at any time of day. This phenomenon was interpreted based on the greater visibility of the Evadne tergestina brood: one of the benefits for embryo maturing during the darkness period would be a decrease of predation on gravid females.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cladocera; Penilia avirostris; Evadne tergestina; Zooplankton; Embryos; Guanabara Bay; Brazil.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000500033
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Dynamic of decapod crustacean larvae on the entrance of Guanabara bay BABT
Fernandes,Lohengrin Dias de Almeida; Bonecker,Sérgio Luiz Costa; Valentin,Jean Louis.
In the present study, we observed seasonal variations in the density of decapod larvae as well as changes in density related to diurnal and tidal cycles. Among the decapod larvae collected, portunids and grapsids were the most abundant, especially during nocturnal ebb tides and near the surface. The same results were obtained in late winter (September) and late summer (March). These results demonstrated a flow of decapod larvae from Guanabara Bay to adjacent coastal waters. Luciferid (Lucifer faxoni) was the only group with high densities during flood tides and we suggest this is an evidence of L. faxoni larvae entering Guanabara Bay in late winter. Probably these changes in distribution of Lucifer faxoni among winter and summer were related to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crustacea Decapoda larvae; Zooplankton; Vertical Distribution; Vertical Migration; Dynamic; Guanabara Bay.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000600013
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Fisheries and conflicts in Guanabara Bay, Rio de Janeiro, Brazil BABT
Jablonski,Silvio; Azevedo,Alexandre de Freitas; Moreira,Luiz Henrique Arantes.
Despite the magnitude of domestic and industrial pollution, fishery yield registered in several landing points at Guanabara Bay, between April 2001 and March 2002 was slightly over 19,000 tons, corresponding to a value of US$ 4.8 million. When considered only the fish directed to the food market, the total catch amounted to about 6,300 tons and a value of US$ 3.7 million. Only a few fish species reached expressive densities compatible with commercial fisheries. Among small pelagic fish, Atlantic anchoveta and Brazilian sardinella were the dominant species, while in terms of demersal fish, croakers, mullets and catfishes comprised the main part of the catch. The absence of landing data previous to the spilling of 1.3 million liters of oil in January 2000...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fisheries; Fisheries statistics; Guanabara Bay; Brazil.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000100010
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Geochemistry and mineralogy of recent sediments of Guanabara Bay (NE sector) and its major rivers - Rio de Janeiro State - Brazil Anais da ABC (AABC)
FARIA,MARCIA DE MELO; SANCHEZ,BRAZ A..
Geochemical and clay mineralogical studies of bottom sediments collected along the Macacu and Caceribu rivers and Guanabara Bay were carried out in order to investigate the relationship between major source areas and recent sediments of the bay. Clay mineralogy includes different groups with selective distribution conditioned by geomorphic features and depositional settings. Micaceous clay minerals are abundant near parent rock in the upper course, whereas kaolinite derived from varied sources is gradually concentrated towards the estuary. In the Guanabara Bay, kaolinite accumulates near river mouths, while micaceous clay minerals are converted into mixed layers in the estuary. Analyses of heavy metal contents reveal higher levels of Zn and Cu in sediments...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Heavy metal; Clay mineral; Sediment; Guanabara Bay.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652001000100010
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Geochronology and heavy metal flux to Guanabara bay, Rio de Janeiro state: a preliminary study Anais da ABC (AABC)
Baptista Neto,José A.; Peixoto,Tomás C.S.; Smith,Bernard J.; Mcalister,John J.; Patchineelam,Soraya M.; Patchineelam,Sambasiva R.; Fonseca,Estefan M..
Guanabara Bay, located in Rio de Janeiro state. It is surrounded by the second most important metropolitan area of the country. Over recent decades, land disturbance and urbanization in the surrounding area has significantly increased sediment input to the bay and had a negative effect on its overall environmental. This is especially related to high volumes of untreated sewage and industrial effluents. This study evaluates the history of this human impact through detailed examination of a sediment core taken from the northern portion of Guanabara Bay. A geochronology is established using 210Pb dating and related to organic carbon and heavy metal fluxes to the sediments. This gave a calculated net average sedimentation rate for the core of 0.67 cm.year-1....
Tipo: Info:eu-repo/semantics/article Palavras-chave: 210Pb; Geochronology; Flux of heavy metal; Guanabara Bay.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401317
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Hydroids (Cnidaria, Hydrozoa) of the intertidal zone of Governador and Paquetá islands, Guanabara Bay, Rio de Janeiro, Brazil Iheringia, Sér. Zool.
Grohmann,Priscila A..
During six consecutive months, sampling were made at three points located on Governador Island and three on Paquetá Island in Guanabara Bay, Rio de Janeiro, Brazil. Material was collected from dock pilings and rocks in the intertidal zone. In these samples, five species belonging to three families, Corynidae, Kirchenpaueriidae and Campanulariidae, were identified. The campanulariid species Obelia dichotoma Linnaeus, 1758, dominated at nearly all points sampled. The small number of species obtained in this survey is attributed to the intense pollution in the bay, which borders the second-largest industrial complex and the second-largest demographic center of Brazil.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Guanabara Bay; Rio de Janeiro; Brazil; Intertidal zone; Rocky shores.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212009000300010
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Impact of the Icaraí Sewage Outfall in Guanabara Bay, Brazil BABT
Marques Júnior,Aguinaldo Nepomuceno; Crapez,Mirian Araujo Carlos; Barboza,Conceição Denise Nunes.
The present study aimed to evaluate the water quality of the Icaraí Sewage Outfall (ISEO) area. Sampling was conducted during winter and summer, and water samples were analyzed for dissolved oxygen, pH, temperature, salinity, dissolved inorganic nutrients (DIN), seston, particulate organic matter (POM), and pigments. Results showed that the water chemistry of the area suffers temporal and spatial variation. Great variability was also seen in the C:N:P ratios of POM (August, 112:30:1; December, 59:11:1) and in the DIN concentrations. Chlorophyll-a and ammonium concentrations (4.5 µg L-1 - 71.2 µg L-1, and 0.20 µM - 52,6 µM, respectively) characterized the ISEO area as eutrophic. The dispersal of the material was not effective under certain oceanographic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Eutrophication; Sewage outfall; Water pollution; Nutrients; Guanabara Bay.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000500014
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Management proposal based on the timing of oral incubation of eggs and juveniles in the sentinel species Genidens genidens (Siluriformes: Ariidae) in a tropical estuary Neotropical Ichthyology
Maciel,Thaís Rodrigues; Vaz-dos-Santos,André Martins; Caramaschi,Erica Pellegrini; Vianna,Marcelo.
ABSTRACT Ariids such as Genidens genidens are particularly susceptible to overfishing because of their complex reproductive mechanisms, which result in slow replenishment of stocks. In this study, we obtained data about the reproductive ecology of the catfish G. genidens in the Guanabara Bay estuary, Rio de Janeiro, Brazil, providing supporting information for management of its fishery. The sex ratio, mean size of each sex at first sexual maturation, and female fecundity were determined and the reproductive period was characterized. The males:females ratio was 1:2. The fecundity is low and increases proportionally to the females’ growth in total length and weight. The breeding season occurs during the warmest months of the year, with spawning extending...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Catfish; Fishery management; Guanabara Bay; Parental care; Reproductive strategy.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000400208
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Morphometric variation in pink shrimp populations at Rio de Janeiro coast (SE Brazil): are they really similar in closer areas? Anais da ABC (AABC)
CARVALHO,CÁSSIA DE; KEUNECKE,KARINA A.; LAVRADO,HELENA P..
Abstract:Farfantepenaeus brasiliensis and F. paulensis are the most exploited shrimps of SE-S Brazilian coast. Our aim was to verify if adjacent nursery areas with different environmental condition (Sepetiba and Guanabara bays, SE Brazil) influence on shrimp populations (eg, CPUE) and body shapes. Samplings were carried out during 12 months in those bays ca. 85 Km far from each other. Carapace length (CL), total body length (TL), wet weight, abdomen size and TL/CL ratio were used to analyze variations in shape through regressions. In general, F. brasiliensis was 4 to 6 times more abundant than F. paulensis. The sex ratio differed from 1:1 in F. brasiliensis in both bays, with dominance of females, largest catches occur in autumn. However, differences in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Farfantepenaeus brasiliensis; Farfantepenaeus paulensis; Guanabara Bay; Morphometry; Pink shrimps; Sepetiba Bay.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000300601
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Palynological analysis of a sediment core obtained in Guanabara Bay, Rio de Janeiro, Brazil Anais da ABC (AABC)
Barreto,Cintia F.; Luz,Cynthia F.P. da; Baptista-Neto,José A.; Vilela,Claudia G.; Barth,Ortrud M..
The sediment of a core collected about 2 km north of Paquetá Island, Guanabara Bay, was submitted to pollen analysis, in order to recognize the dynamics of the regional vegetation, and the anthropic influence. Radiocarbon dating of a sample next to the bottom of the core indicates an age of 4.210 ± 40 14C yrs B.P (calibrated age). It was possible to establish four palynological zones. Starting at the bottom of the core, a decrease in palynomorph concentration, the presence of degraded pollen grains and spores, and the predominance of ombrophilous forest pollen grains were observed in the basal portion of Zone I. These data may indicate the presence of an exuberant Atlantic Forest, dominated by a marine regressive event. The concentration of well-preserved...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pollen; Quaternary Palynology; Guanabara Bay; Paleoenvironment.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652007000200005
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Pollen record and paleoenvironment of a 4210 years B.P.old sediment in the Bay of Guanabara, Rio de Janeiro, Brazil Anais da ABC (AABC)
Barth,Ortrud M.; Barreto,Cíntia F.; Coelho,Luciane G.; Luz,Cynthia F.P..
Pollen analysis of a sediment sample obtained at 222 cm from the top of a drilling core collected in the Bay of Guanabara, Rio de Janeiro, was used as a tool to obtain more knowledge about pre-historical human living and environment. 14C datation revealed the age of 4210 years B.P. Most frequent pollen grains came from plants like Alchornea (Euphorbiaceae), Celtis (Ulmaceae), Lecythidaceae, Meliaceae, Ochnaceae and spores from forest Pteridophyta. Palynology and environmental studies revealed that agricultural activities could not be detected. The dense tropical rain forest was the dominant vegetation occurring in this region.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pollen; Paleoenvironment; Guanabara Bay; Rio de Janeiro; 4210 BP.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000300009
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Protists and bacteria interactions in the presence of oil Anais da ABC (AABC)
BITENCOURT,JOSÉ A.P.; SILVA,FREDERICO SOBRINHO; SILVA-NETO,INÁCIO D. DA; CRAPEZ,MIRIAN A.C..
Little is known about the role of protists and bacteria interactions during hydrocarbon biodegradation. This work focused on the effect of oil on protists from three different locations in Guanabara Bay and bacteria from Caulerpa racemosa (BCr), Dictyota menstrualis (BDm) and Laurencia obtusa (BLo) during a 96 h bioassay. Cryptomonadida (site 1, 2 and 3), Scuticociliatida (site 2) and Euplotes sp.1 and Euplotes sp.2 (site 3) appeared after incubation. The highest biomass observed in the controls was as follows: protist site 3 (6.0 µgC.cm–3, 96 h) compared to site 3 with oil (0.7 µgC.cm–3, 96 h); for bacteria, 8.6 µgC.cm–3(BDm, 72 h) and 17.0 µgC.cm–3(BCr with oil, 24 h). After treatment, the highest biomasses were as follows: protists at site 1 and BLo,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacterial consortia; Biomass; Free living protist; Guanabara Bay; Microbial loop; Petroleum.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000200745
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Record of Pleopis schmackeri (Poppe) (Branchiopoda, Onychopoda) in the Guanabara Bay, Rio de Janeiro, Brazil Zoologia
Marazzo,Andrea.
A first recordof Pleopis schmackeri (Poppe,1889) (Branchiopoda, Onychopoda) in the Guanabara Bay, Rio de Janeiro, Brazilis described.This marine cladoceran species occurred in zooplanktonic samples obtained on June 26, 2000, with densities ? 4.0 ind.m-3. Its presence may berelated with inflow of coastal waters to the bay.
Tipo: Info:eu-repo/semantics/other Palavras-chave: Cladocera; Pleopis schmackeri; Zooplankton; Guanabara Bay; Brazil.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000500027
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Redescription of Tetilla radiata Selenka from the Southwestern Atlantic (Porifera, Spirophorida, Tetillidae) and designation of its neotype Zoologia
Santos,Cristina P.; Hajdu,Eduardo.
The first redescription of T. radiata Selenka, 1879 based on study of a live population and material other than the type is presented. A neotype is proposed for the species, from a locality some 400 km to the southwest as it has not been found in its original type locality, Guanabara Bay (Rio de Janeiro, Rio de Janeiro State).
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brazil; Guanabara Bay; São Sebastião Channel; Taxonomy.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000400013
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Reproduction and structure of the population of the Chaetognath Parasagitta friderici in Guanabara Bay (Brazil) based on short term sampling Anais da ABC (AABC)
Mendes,Fabiana; Figueiredo,Gisela M. de; Valentin,Jean L..
The aim of this study was to describe the total density, densities of developmental stages and the reproduction period of Parasagitta friderici. Weekly samples were collected at one station in the channel of Guanabara Bay, Rio de Janeiro, during one year. Three vertical hauls were made for each sample, and P. friderici was separated, the developmental stages were identified, and body length (BL), ovary length (OL) and seminal vesicle width (SVW) were measured. Throughout the year P. friderici was the most abundant chaetognath species occurring in all four developmental stages, the densities of which varied from week to week. Higher densities of adults occurred in the spring, followed by peaks of juveniles in the summer. Although P. friderici seems to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chaetognath; Development stage; Guanabara Bay; Reproduction.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000100010
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Seasonal variation in fish larvae at the entrance of Guanabara Bay, Brazil BABT
Castro,Marcia S. de; Bonecker,Ana Cristina Teixeira; Valentin,Jean L..
Studies were carried out to find out qualitative and quantitative temporal variations in fish larvae to relate seasonal, diurnal and tidal cycles to the density of larvae. Sampling was performed at one station, during two three-day periods in September 1995 and March 1996. Samples were collected during ebb and flood tides,in oblique hauls using a bongo net of 500 µm mesh size. A total of 42 taxa were identified. The families Engraulidae (Cetengraulis edentulus, Anchoa lyolepis) and Clupeidae (Harengula jaguana) had high mean densities and dominated both periods. Higher larval mean densities occurred in March, a period of relatively high temperatures and low salinities. The diurnal pattern of larval abundance consisted of high densities at night and low...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish larvae; Seasonal variation; Tidal cycle; Diurnal variation; Coastal bay; Guanabara Bay.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000100016
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Spatial distribution of pollen grains and spores in surface sediments of Guanabara Bay, Rio de Janeiro, Brazil Anais da ABC (AABC)
Barreto,Cintia F.; Vilela,Claudia G.; Baptista-Neto,José A.; Barth,Ortrud M..
Aiming to investigate the deposition of pollen grains and spores in Guanabara Bay, Rio de Janeiro State, 61 surface sediment samples were analyzed. The results showed that the current deposition of palynomorphs in surface sediments of Guanabara Bay represents the regional vegetation of this hydrographic basin. The differential distribution of palynomorphs followed a pattern influenced by bathymetry, tidal currents speed, discharge of numerous rivers, and by human activity. The dominance of representatives of Field Vegetation reflects the changes of the original flora caused by intense human activities in the region. The continued presence and richness of pollen types of rain forest in the samples indicates that their source area might be the vegetation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Palynomorphs; Surface sediments; Deposition; Preservation; Guanabara Bay; Brazil.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000300006
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