Consulta: creatorFacets:"Rocha,Odete"
Registros recuperados: 17
Data/hora: 03/06/2024 08:43:49

Synchaeta jollyae (Shiel &amp;amp; Koste) (Rotifera, Synchaetidae): an overlooked species or a newcomer in Neotropical freshwaters?
Provedor de dados: 76
Autores: Negreiros,Natalia F.; Santos,Renata M. dos; Oliveira,Laira Lúcia Damasceno de; Santos-Wisniewski,Maria J. dos; Rocha,Odete.
Populations of Synchaeta jollyae (Shiel &amp;amp; Koste, 1993) (Rotifera), a species recently recorded for the first time in Brazil and South America, were analyzed in reservoirs in Southeast Brazil. Sampling was carried out monthly from August 2006 to July 2007 at Furnas Reservoir in the Rio Grande basin, state of Minas Gerais, and in four cascade reservoirs in the Tietê River basin (Barra Bonita, Bariri, Ibitinga and Nova Avanhandava) state of São Paulo, in June and September 2008 and in January and May 2009. Synchaeta jollyae occurred in most samples and periods. From the results obtained it is evident that S. jollyae occurs in water bodies of varied trophic status but reaches larger populations in eutrophic water bodies and during lower temperature...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zooplankton; Rotifers; Furnas Reservoir; Tietê River.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000200007

Population structure and reproductive biology of Cichla kelberi (Perciformes, Cichlidae) in Lobo Reservoir, Brazil
Provedor de dados: 83
Autores: Souza,Jussara E. de; Fragoso-Moura,Evelise N.; Fenerich-Verani,Nelsy; Rocha,Odete; Verani,José R.
The structure of Cichla kelberi population was characterized regarding the sex ratio, total length composition and some reproductive characteristics. The specimens were collected in two periods, from November 2002 to November 2003 and from December 2004 to May 2006. The sex ratio was significantly different than 1:1. The total length varied from 3.4 to 40.1 cm, with individuals in the shortest length classes occurring throughout the year, but with greater incidence in the warmer periods. Females and males reached similar lengths and there was no difference between the sexes regarding the length-weight relationship. The estimated values of condition factor were near the central value of 1.0 and decreased during the cooler months, coinciding with periods of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Condition factor; Fecundity; Length-weight relationship; Reproduction.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000200007

New records of Parvalona parva (Crustacea: Anomopoda: Chydoridae) from Brazil, with first description of the male
Provedor de dados: 103
Autores: Elmoor-Loureiro,Lourdes M.A.; Santos-Wisniewski,Maria J. dos; Rocha,Odete.
The Neotropical species Parvalona parva (Daday, 1905) was previously reported only from two localities (Northern Argentina and Lençóis Maranhenses, Brazil). In the present paper, seven new records of P. parva from Brazil are presented. The specimens were collected from small waterbodies located in the Federal District and the states of São Paulo, Pará, and Pernambuco. These new records suggest that this species is not as rare as previously believed. The male, sexual female, and the lateral head pores of parthenogenetic females are described and illustrated for the first time.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aloninae; Cladoceran; South America; Systematic.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000200022

A malacofauna bentônica das represas do médio rio Tietê (São Paulo, Brasil) e uma avaliação ecológica das espécies exóticas invasoras, Melanoides tuberculata (Müller) e Corbicula fluminea (Müller)
Provedor de dados: 104
Autores: Suriani,Ana L.; França,Roberta S.; Rocha,Odete.
Este trabalho analisa a composição de espécies, a densidade e a distribuição espacial e temporal da malacofauna bentônica em três represas do médio rio Tietê. As coletas foram realizadas em dois períodos climáticos, o chuvoso em novembro de 2002 e o seco em agosto de 2003, amostrando-se três porções em cada represa (superior, mediana e barragem) e seguindo uma varredura com seis pontos amostrais em cada transecto. Os dados limnológicos obtidos evidenciaram que as represas do médio rio Tietê encontram-se eutrofizadas com elevadas concentrações de nutrientes (totais e dissolvidos). Foram registradas oito espécies de moluscos sendo seis nativas e duas exóticas. Destas, a espécie dominante foi o molusco exótico e invasor Melanoides tuberculata (Müller, 1774),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diversidade; Ecologia de reservatórios; Moluscos invasores.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000100003

Composição das espécies de moluscos bentônicos nos reservatórios do baixo rio Tietê (São Paulo, Brasil) com uma avaliação do impacto causado pelas espécies exóticas invasoras
Provedor de dados: 104
Autores: França,Roberta S.; Suriani,Ana L.; Rocha,Odete.
A composição taxonômica, a densidade e a distribuição espacial de moluscos bentônicos nos reservatórios do baixo rio Tietê (São Paulo) foram analisadas. A amostragem dos moluscos foi realizada em novembro de 2002 e agosto de 2003. As características físicas e químicas dos reservatórios também foram avaliadas buscando-se correlacioná-las à composição taxonômica e à distribuição dos táxons através da Análise de Correspondência Canônica (ACC). A espécie exótica Melanoides tuberculata esteve distribuída em todas as porções amostradas e foi a espécie mais abundante, correspondendo a 65,9% ou mais da abundância total, sendo dominante em todos os reservatórios, com densidade máxima de 23753 ind.m-2 registrada na profundidade de 2 m da porção superior do...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corbicula fluminea; Malacofauna; Melanoides tuberculata; Sudeste do Brasil.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000100005

Life cycle traits of Philodina roseola Ehrenberg, 1830 (Rotifera, Bdelloidea), a model organism for bioassays
Provedor de dados: 42
Autores: Moreira,Raquel A.; Mansano,Adrislaine S.; Rocha,Odete.
This paper describes experimental results on the life cycle of the rotifer Philodina roseola cultured in the laboratory. Detailed information on life-cycle parameters of a certain species provides a deep understanding and contributes to a better knowledge of the role of the species in the community, besides providing data that are basic to other ecological investigations such as secondary production estimates and knowledge for applications such as its utilization as test-organism in ecotoxicological studies. The average duration of embryonic development of P. roseola was 23.88 h, the age at maturity of primipara was 3.5 days and the maximum lifespan was 23 days. The average size of the rotifer neonate was 198.77 µm, the mean size of primipara was 395.56 µm...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rotifer; Embryonary development; Growth; Fecundity; Longevity.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000200579

Riqueza de espécies de Oligochaeta (Annelida, Clitellata) em duas represas do rio Tietê (São Paulo)
Provedor de dados: 49
Autores: Pamplin,Paulo Augusto Zaitune; Rocha,Odete; Marchese,Mercedes.
A riqueza de espécies de Oligochaeta foi investigada em duas represas construídas no curso do rio Tietê. Em cada represa foram obtidas 360 amostras de sedimento em 90 pontos de amostragem, utilizando-se uma draga Van Veen (378cm²), nos meses de janeiro, abril, julho e outubro de 2001. No total foram examinados 12.826 exemplares de oligoquetos pertencentes a 20 espécies, 10 gêneros e 4 famílias. Naididae e Dero foram a família e o gênero com maiores riquezas de espécies, com 14 e 9 espécies, respectivamente. Do total de espécies identificadas, 6 estiveram presentes em ambas represas, sendo Branchiura sowerbyi (Tubificidae) a espécie mais abundante nestes ambientes. A análise das amostras revelou que a maioria das espécies de oligoquetos é rara e de...
Tipo: Info:eu-repo/semantics/article
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032005000100007

Invasion of the dinoflagellate Ceratium furcoides (Levander) Langhans 1925 at tropical reservoir and its relation to environmental variables
Provedor de dados: 49
Autores: Silva,Lidiane Cristina da; Leone,Isabela Carnielli; Santos-Wisniewski,Maria José dos; Peret,Alberto Carvalho; Rocha,Odete.
Dinoflagellates of the genus Ceratium are chiefly marine but there are rare occurrences in freshwater. In this study we analyze the invasion and progressive establishment of Ceratium furcoides, an exotic species, in the Furnas Reservoir. Samples were taken at 36 points in the reservoir, during the months of March, June, September and December, 2007. Measurements of some physical and chemical variables were simultaneously performed at each site. The occurrence of C. furcoides was registered at 20 sites, with densities varying between 0.57 and 28,564,913.0 ind.m-3. Blooms of this species were recorded in points which were classified as mesotrophic, coinciding with the places receiving high amounts of untreated domestic sewage. C. furcoides density was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Invasive species; Algal blooms; Eutrophication; Reservoir ecology.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000200010

A search for predators and food selectivity of two native species of Hydra (Cnidaria: Hydrozoa) from Brazil
Provedor de dados: 49
Autores: Massaro,Fernanda Cristina; Negreiros,Natalia Felix; Rocha,Odete.
The Hydra is the most common representative of freshwater cnidarians. In general, it is found in freshwaters on every continent, with the exception of Antarctica. The aim of the present study is to gather biological and ecological data on aspects of two species of Hydra native to Brazil: Hydra viridissima and Hydra salmacidis. Predation and food selectivity experiments were performed to assess the possible predators and the prey preferences, respectively, of the two species. The results indicate that the two species of Hydra were not consumed by any of the predators that were tested, which are typical predators of invertebrates in freshwater: nymphs of Odonata Anisoptera and the phantom midge larvae of Chaoborus sp. (Insecta), adults of Copepoda Cyclopoida...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hydra viridissima; Hydra salmacidis; Predation; Prey selection; Feeding.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000200035

Checklist de Cladocera de água doce do Estado de São Paulo
Provedor de dados: 49
Autores: Rocha,Odete; Santos-Wisniewski,Maria José; Matsumura-Tundisi,Takako.
Neste trabalho é apresentada uma lista atualizada das espécies de Cladocera do Estado de São Paulo com base em levantamentos anteriores e em revisão da literatura recente, a qual inclui em grande parte os estudos oriundos do Programa Biota FAPESP. Levantamentos realizados há uma década apontaram a ocorrência de 112 espécies de Cladocera no Brasil e 84 para o Estado de São Paulo. A presente revisão evidencia a ocorrência de 96 espécies deste grupo no Estado de São Paulo, o que representa um acréscimo de 15% na riqueza de espécies. Dentre os 300 corpos de água amostrados em 23 unidades de gerenciamento dos recursos hídricos do Estado de São Paulo, no âmbito do Programa BIOTA/FAPESP, as unidades Mogi-Guaçu e Aguapeí são aquelas com maior riqueza de espécies,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cladocera de água doce; Biota paulista; Programa BIOTA/FAPESP.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000500024

Influence of environmental quality of the tributaries of the Monjolinho River on the relative condition factor (Kn) of the local ichthyofauna
Provedor de dados: 49
Autores: Barrilli,Germano Henrique Costa; Rocha,Odete; Negreiros,Natalia Felix; Verani,José Roberto.
The relative condition factors (Kn) of the fishes Astyanax paranae, Phalloceros harpagos and Poecilia reticulata were used as a means of assessing the influence of environmental conditions on the well-being of sub - populations of these species, with the eventual aim of using them as bioindicators of disturbance in tributary streams of the Monjolinho River, in São Carlos - SP. The power-law curve generated by the length-weight relationship indicated a positive allometric growth for the three species studied. Overall, the canonical correspondence analysis (CCA) positively correlated average Kn of A. paranae with well oxygenated and oligotrophic environments, typical of conserved areas or near the natural state. For the average value of Kn obtained for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomonitoring; Condition factor; Length-weight relationship; Degradation; Bioindicators.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032015000100104

O estado atual do conhecimento da diversidade dos Cladocera (Crustacea, Branchiopoda) nas águas doces do estado de Minas Gerais
Provedor de dados: 49
Autores: Santos-Wisniewski,Maria José dos; Matsumura-Tundisi,Takako; Negreiros,Natália Felix; Silva,Lidiane Cristina da; Santos,Renata Martins dos; Rocha,Odete.
O objetivo do presente trabalho é apresentar uma check list atualizada dos registros existentes para espécies de Cladocera nas águas doces do Estado de Minas Gerais que possa servir de base para os estudos em andamento ou estudos futuros dentro do escopo do Programa Biota Minas. O trabalho baseia-se numa extensa revisão da literatura incluindo recentes revisões taxonômicas, particularmente para alguns gêneros da família Chydoridae. O levantamento realizado evidenciou a ocorrência de 94 espécies de Cladocera, distribuídos em 88 corpos de água no estado de Minas Gerais. Estes cladóceros incluem representantes de 35 gêneros pertencentes a 7 das 8 famílias com ocorrência nas águas doces da região Neotropical. Para os Cladocera em geral, a família com maior...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodiversidade; Riqueza de cladocera; Chydoridae; Cladóceros tropicais; Diversidade em água doce; Zooplâncton.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000300024

Zooplankton communities as eutrophication bioindicators in tropical reservoirs
Provedor de dados: 49
Autores: Gazonato Neto,Antonio José; Silva,Lidiane Cristina da; Saggio,Angelo Augusto; Rocha,Odete.
Eutrophication is a process characterized by an increase in the aquatic system productivity, which causes profound changes in the structure of its communities. Owing to the high environmental sensitivity of planktonic species, the study of their communities can indicate the deterioration of the environment. The Jaguari and Jacareí reservoirs are part of the Cantareira System, supplying water to São Paulo inhabitants and that has been affected by several forms of continuous human interference. Here we analyze some properties of the zooplankton community as bioindicators of eutrophication and water quality change. In situ physical and chemical measurements were carried out, water was collected for analysis and quantitative zooplankton samples were taken at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zooplankton; ABC curves; Calanoida/Cyclopoida ratio; Cantareira System; Environmental impact.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032014000400104

The influence of environmental factors on the seasonal dynamics and composition of Rotifera in the Sapucaí River arm of Furnas Reservoir, MG, Brazil
Provedor de dados: 49
Autores: Negreiros,Natalia Felix; Santos-Wisniewski,Maria José dos; Santos,Renata Martins dos; Rocha,Odete.
Seasonal fluctuations in the dynamics of the plankton rotifer populations in an oligo-mesotrophic branch of a tropical reservoir were analyzed with respect to the possible influence of environmental conditions (physical, chemical and biological), with emphasis on biological interactions. Samples were taken monthly from August 2006 to July 2007. The well-defined climatic seasons were reflected in variations of the physical and chemical properties of the water. The zooplankton community consisted mainly of Rotifera, Cladocera and Copepoda, with occasional representatives of Chaoborus brasiliensis (Diptera), Ostracoda, Protozoa and Turbellaria. Rotifera was the dominant group in zooplankton community in 5 of the 12 months of the study and were represented by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rotifera; Furnas reservoir; Intra-zooplankton predation; Inter-specific competition.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032010000400023

Species richness and geographic distribution of the genera Chydorus and Pseudochydorus (Cladocera, Chydoridae) in São Paulo State
Provedor de dados: 49
Autores: Santos-Wisniewski,Maria José; Rocha,Odete; Guntzel,Adriana Maria; Matsumura-Tundisi,Takako.
The Chydorus and Pseudochydorus genera are widely distributed around the world. Some species of Chydorus are among the commonest anomopods and Pseudochydorus globosus, the only species of the genus, is believed cosmopolitan. This study was part of the project " Zooplanktonic biodiversity and state of degradation of continental water ecosystems in São Paulo State" , itself a part of the FAPESP/BIOTA Program - The Virtual Institute of Biodiversity (www.biotasp.org.br), the aim being to make an inventory and analyze the distribution of species of the genera Chydorus and Pseudochydorus in São Paulo State, Brazil. In total, 373 samples were collected from 223 water bodies in the Water Resources Management Units of São Paulo State, between 9/9/1999 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anomopoda; Chydoridae; Littoral region; Biodiversity.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032008000100007

Alterations on growth and gill morphology of Danio rerio (Pisces, Ciprinidae) exposed to the toxic sediments
Provedor de dados: 52
Autores: Fracácio,Renata; Verani,Nelsy Fenerich; Espíndola,Evaldo Luiz Gaeta; Rocha,Odete; Rigolin-Sá,Odila; Andrade,Cássio Arilson.
The objective of this work was to assess the toxicity of sediment samples from six cascade reservoirs in Tietê river system, in São Paulo State, Brazil, through chronic-partial toxicity bioassays with Danio rerio larvae as test-organisms. Histology of gills and biometric measurements were used to determine the existence of toxicity problems. The alterations on gill morphology here detected were considered of first stage (hyperplasia, lamellar junction and excess of mucous cells) in the first reservoirs and very slight in the last ones. The biometric analysis pointed to inadequate conditions for the growth of the test-organisms when exposed to the sediment of the rivers and upstream reservoirs and also indicated an improvement of environmental conditions...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gill morphology; Sediment toxicity; Danio rerio; Tietê reservoirs; Pollution.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000400023

Environmental quality evaluation of lakes in the Rio Grande do Sul coastal plain
Provedor de dados: 52
Autores: Pedrozo,Catarina da Silva; Rocha,Odete.
The purpose of the present work was to evaluate the environmental quality of Marcelino, Pinguela, Peixoto, Palmital, Malvas and Do Passo lakes, interconnected by canals and located in the district of Osório, RS. In this context, 29 physical and chemical variables were analyzed with sampling carried out in January, May, July and October 1997 to verify the environmental quality of the system and the existence of a gradient of quality. Canonical Analysis was applied to the data of all environmental variables measured, and showed that the lakes had different characteristics as a consequence of the organic pollution received. Marcelino lake received continuous input of organic matter from the sewage treatment works in the town of Osório, whereas Peixoto,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Castal lakes; Water quality; Environmental variables; Limnological characteristics.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000400013