Júlio César Sá‐Oliveira

ORCID: 0000-0002-4867-4720
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Research Areas
  • Fish biology, ecology, and behavior
  • Fish Biology and Ecology Studies
  • Fish Ecology and Management Studies
  • Environmental Sustainability and Education
  • Aquaculture Nutrition and Growth
  • Parasite Biology and Host Interactions
  • Ichthyology and Marine Biology
  • Water Quality and Pollution Assessment
  • Mollusks and Parasites Studies
  • Science and Education Research
  • Aquaculture disease management and microbiota
  • Turtle Biology and Conservation
  • Aquatic Ecosystems and Biodiversity
  • Chemistry Education and Research
  • Healthcare Regulation
  • Geography and Environmental Studies
  • Healthcare and Venom Research
  • Physiological and biochemical adaptations
  • Aquatic Ecosystems and Phytoplankton Dynamics
  • Circadian rhythm and melatonin
  • Education Pedagogy and Practices
  • Legionella and Acanthamoeba research
  • Fecal contamination and water quality
  • Healthcare and Environmental Waste Management
  • Vibrio bacteria research studies

Universidade Federal do Amapá
2011-2022

Universidade Federal do Pará
2020

Summary Major hydroelectric dams are proliferating in tropical regions such as Amazonia, where extensive new hydropower developments planned despite potentially severe ecological and social impacts. The status of freshwater biota the vicinity existing could be valuable to predict effects developments, but detailed monitoring before after dam construction is frequently lacking. In absence these data, we used a space‐for‐time replacement compare key component aquatic at upstream downstream...

10.1111/fwb.12628 article EN Freshwater Biology 2015-06-29

We investigated the niche breadth and overlap of fish species occurring in four environments affected by Coaracy Nunes reservoir, Amapá Brazilian State. Seasonal samples fishes were taken using a standard configuration gillnets, as well dragnets, lines, cast-nets. Five hundred forty stomach contents, representing 47 analyzed quantified. Niche estimated indexes Levins Pianka, respectively, while interspecific competition was evaluated null model (RA3). ANOVA Kruskal-Wallis test used, to...

10.1590/0001-3765201420130053 article EN cc-by Anais da Academia Brasileira de Ciências 2014-03-01

O reservatório da UHE Coaracy Nunes, no Estado do Amapá, Brasil é o mais antigo Amazônia e foi construído com fins de produção energia elétrica. objetivo deste trabalho investigar a pesca Nunes adjacências, descrevendo pesqueira, as espécies peixes maior interesse os aspectos sócio-econômicos dos pescadores. A metodologia utilizada fundamentada em questionamentos feitos diretamente 53 pescadores utilizando formulários específicos que continham perguntas sobre pesca. Os resultados revelaram...

10.18561/2179-5746/biotaamazonia.v3n3p83-96 article PT cc-by Biota Amazônia 2013-12-30

The present study focused on the fish fauna of 44-year-old Coaracy Nunes reservoir in northern Amazon basin, producing estimates growth constant (k), maximum and asymptotic body lengths weights, natural mortality (M), consumption/biomass ratio (QB) (intake food by a group over year), Aspect (Ar) caudal fin, performance (Φ), longevity, trophic level for 45 species. Species collection was divided into eight sampling campaigns between May 2009 July 2010. Gillnets were used four sites. results...

10.1111/jai.12667 article EN Journal of Applied Ichthyology 2014-12-16

The stomach contents of 172 individuals Hypostomus plecostomus and 94 specimens emarginatus from the Coaracy Nunes reservoir in northern Brazil were analyzed order to evaluate feeding ecology two fish species this site. Data collected eight campaigns conducted every months between May, 2010 July, 2011, four dry season during flood period. analysis was based on volumetric frequency (VF%) occurrence (FO%), combined with index (FI). Nine different dietary items identified: detritus, plant...

10.18561/2179-5746/biotaamazonia.v3n2p116-125 article EN cc-by Biota Amazônia 2013-08-30

Este trabalho teve como objetivo estudar os hábitos alimentares da raia P. motoro na APA do Rio Curiaú, Macapá-Amapá, no período de Julho/2006 a agosto/2007. Foram capturados 144 indivíduos, dos quais 79 eram fêmeas e 65 machos em duas estações sazonais (cheia seca). realizados métodos análise dieta, percentuais volumétricos, ocorrência IAi. A dieta alimentar estava composta por vinte três (23) itens, sendo o item crustáceo considerado preferencial, seguido peixes.

10.18561/2179-5746/biotaamazonia.v1n2p66-73 article PT cc-by Biota Amazônia 2011-12-30

O objetivo deste trabalho foi verificar a percepcao ambiental de alunos do 3° ano nivel medio 4 escolas publicas Macapa-AP, atraves uma pesquisa qualiquantitativa aplicada para avaliar o grau consciencia e conhecimento, sobre os riscos impactos causados por agrotoxicos filosofia praticas agroecologicas. Os resultados obtidos demonstraram que maioria dos desconhecia tema agroecologia, mas alguma forma executavam agroecologicas sem se dar conta disso. Tambem identificou ha parcela...

10.18561/2179-5746/biotaamazonia.v5n3p98-107 article PT cc-by Biota Amazônia 2015-09-30

Peixes limpadores removem ectoparasitas, tecido doente ou ferido, muco e escamas da superfície corporal de outros peixes, sendo portanto fundamental importância para a manutenção do equilíbrio saúde dos peixes ecossistema recifal. Na costa brasileira são registradas 24 espécies limpadores, das quais se destaca Elacatinus figaro, uma mais especializada. Este estudo registrou diversidade clientes o período atividade limpeza figaro nos recifes coral Parrachos Muriú, Rio Grande Norte. Foram 21...

10.1590/s1676-06032011000100004 article PT Biota Neopropica/Biota Neotropica 2011-03-01

O presente estudo teve como objetivo diagnosticar a ocorrencia do caramujo africano Achatina fulica  em tres bairros da cidade de Santana-Amapa: Bairro Paraiso, Centro e Vila Amazonas. Para isso, coletas foram realizadas durante o ano 2010. As amostras efetuadas com instalacao dois (2) quadrats 2,00 x metros, onde se verificava presenca dos moluscos, em 5 parcelas (lotes urbanos) 10,00 25,00 metros cada bairro, totalizando uma area 3.750 2 . Os individuos coletados usando um esforco duas...

10.18561/2179-5746/biotaamazonia.v3n1p9-12 article PT cc-by Biota Amazônia 2013-06-30

O objetivo deste trabalho foi analisar a dieta de Ageneiosus ucayalensis do reservatorio da Usina Hidreletrica Coaracy Nunes, no municipio Ferreira Gomes/AP. As amostragens foram feitas bimestralmente em tres estacoes coleta na area entre julho/2009 e julho/2010. coletas realizadas utilizando redes espera, organizadas baterias com sete cada diferentes distâncias nos. Apos captura, realizada biometria dos exemplares, sendo seus estomagos retirados, fixados conservados para analise...

10.18561/2179-5746/biotaamazonia.v4n3p73-82 article PT Biota Amazônia 2014-09-30

The objective of this study was to document the structure fish assemblages found in aquatic environments affected by Coaracy Nunes hydroelectric reservoir Ferreira-Gomes, Amapá (Brazil) and principal factors that determine structure. In order do this, standardized samples were collected fauna environmental parameters four sectors (upstream, reservoir, lake, downstream). Fish species richness, abundance, biomass estimated for each sector. abundance data analyzed using null models...

10.1177/194008291600900103 article EN cc-by Tropical Conservation Science 2016-03-01

O presente trabalho foi desenvolvido durante o ano de 2009 e teve como objetivo a notificacao registro das principais caracteristicas dos acidentes por raias em quatro comunidades da APA do Rio Curiau. Para este estudo foram investigadas 22 vitimas obtendo-se informacoes sobre os acidentes, as quais tabuladas analisadas estatisticamente. A maior frequencia na localidade Torrao Curiau com 63,67% casos. As estavam faixa etaria acima 15 anos maioria era sexo masculino. Segundo vitimas, nenhuma...

10.18561/2179-5746/biotaamazonia.v1n2p74-78 article PT cc-by Biota Amazônia 2011-12-30

The exploitation of resources by closely related species with similar niches may be mediated differences in activity patterns, which vary nycthemeral scale and seasonal scale. Piranhas Serrasalmus gibbus rhombeus are Neotropical predators that occur sympatrically many environments the Amazon basin. To evaluate strategies adopted these two a restricted environment (a reservoir), samples were made, identifying composition diet their patterns. A total 402 specimens collected: 341 S. 61 . Both...

10.1155/2017/8064126 article EN cc-by The Scientific World JOURNAL 2017-01-01

Fecundity and type of spawning tamuatá, Hoplostemum littorale Hancock (Osteichthyes, Siluriformes) in Curiaú River, Macapá, Amampá.During June 1999 to 2000 one hundred forty seven females HoplosrernulIl lirrorale Hancock, 1828 were collected from lhe Amapá, Brazil.The objective this study was determine the fecund ity H. lirrora/e.Anal ysis percentage distribution oocyte diameters females, five different stages gonadal developmenl, showed that species is a total spawner.There two size gro ups...

10.1590/s0101-81752002000400009 article EN Revista Brasileira de Zoologia 2002-12-01

The present study aimed to evaluate the water quality of Private Reserve Natural Seringal Triumph. evaluation was done by calculating Water Quality Index (IQA) from data obtained in eight monitoring points with samples collected two distinct periods: month December 2012 representing dry season and June 2013 full period. methodology selected IQA (NSF) is index most widely adopted within brazilian states. parameters for formulation were: temperature, pH, turbidity, fecal coliform, BOD, DO,...

10.18561/2179-5746/biotaamazonia.v4n2p28-42 article EN cc-by Biota Amazônia 2014-06-30

O objetivo do presente estudo foi avaliar a qualidade da agua alto Rio Pedreira, de modo gerar informacoes que possam atuar como subsidio na preservacao desse recurso aquatico. ponto amostragem esta situado no perimetro Km 106, BR 156, nos limites Municipio Porto Grande e Ferreira Gomes. Os parâmetros analisados foram: Temperatura agua, Potencial Hidrogenionico (pH), Transparencia, Turbidez, Condutividade Eletrica, Nitratos, Amonia, Fosforo Total, Ferro Oxigenio Dissolvido (OD), Solidos...

10.18561/2179-5746/biotaamazonia.v5n2p107-118 article PT cc-by Biota Amazônia 2015-06-30

O presente estudo objetivou estimar a fecundidade e o tipo de desova do peixe-eletrico Electrophorus electricus da Area Protecao Ambiental - APA Rio Curiau, Macapa-Amapa. As analises foram realizadas partir 96 exemplares peixe coletados no periodo marco 2006 fevereiro 2007 . Analises ciclo anual estadios maturacao gonadal, exames macro microscopico das gonadas, verificacao dos diâmetros contagens ovocitos realizadas. numero relacionados uma dimensao corporea (comprimento total) ao Peso Total...

10.18561/2179-5746/biotaamazonia.v2n1p32-36 article PT cc-by Biota Amazônia 2012-06-30

Urbanization causes environmental impacts that threaten the health of aquatic communities and alter their recovery patterns. In this study, we evaluated diversity intertidal fish in six areas affected by urbanization (areas with native vegetation, deforested areas, process restoration vegetation) along an urban waterfront Amazon River. 20 species were identified, representing 17 genera, 14 families, 8 orders. The different degrees habitat degradation had a major effect on composition fauna;...

10.1155/2016/2810136 article EN cc-by The Scientific World JOURNAL 2016-01-01

This study deals with the influence of education on population dynamics African snail, Achatina fulica, in Santana, Amapá, Brazil. Mollusc samples were taken installation two quadrants 2.00 × meters, where there was presence animals five installments (urban land) each neighborhood. Individuals collected by manual capture an effort 2 hours per plot/sampler and then weighed measured. Questionnaires administered to residents neighborhood order know their perception towards snail. The results...

10.4236/ce.2016.71016 article EN Creative Education 2016-01-01

Durante o período de julho 2000 a maio 2001 foram analisadas estrutura populacional em comprimento, as relações peso-comprimento e fator condição H. littorale da APA do Rio Curiaú, para machos fêmeas separados.

10.18561/2179-5746/biotaamazonia.v1n1p38-41 article PT cc-by Biota Amazônia 2011-06-30
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