Results 31 to 40 of about 519 (177)

Guanabara Bay: For all hopes to a new awakening of paradise

CALIBRE - Revista Brasiliense de Engenharia e Física Aplicada, 2020
<p><strong>Abstract: </strong>Exclusion Territories are geographical areas under the action of degenerative environmental phenomena of anthropogenic origin, which compromise quality of life in general. One of the greatest examples of such areas is the Guanabara Bay and its surroundings, the scene of some of the worst disastrous ...
Nilo Serpa, Richard Cathcart
openaire   +2 more sources

Ecological risk evaluation of sediment metals in a tropical Euthrophic Bay, Guanabara Bay, Southeast Atlantic [PDF]

Marine Pollution Bulletin, 2016
Surface sediments were collected from Guanabara Bay, at 14 stations distributed in five sectors, over three sampling campaigns. Analyses of metals, grain size fractions and total organic carbon analyses were performed. The geo-accumulation index and the enrichment factor were estimated to assess contamination status based on background values ...
Abreu, Ilene Matano, Cordeiro, Renato Campello, Soares-Gomes, Abilio, Abessa, Denis Moledo S., Maranho, Luciane Alves, Santelli, Ricardo Erthal   +5 more
openaire   +3 more sources

Reproductive plasticity and environmental tolerance of invasive African catfish (Clarias gariepinus) in a tropical Brazilian river

Journal of Fish Biology, Volume 109, Issue 1, Page 264-277, July 2026.
Abstract Invasive alien species (IAS) pose a significant threat to biodiversity, particularly when endowed with high ecological and reproductive plasticity. The African catfish, Clarias gariepinus, is one such species, widely recognized for its ability to colonize and establish in diverse tropical ecosystems.
Michelle Torres Dumith, Alejandra Filippo Gonzalez Neves dos Santos   +1 more
wiley   +1 more source

Digamacris n. gen. (Orthoptera, Acrididae, Melanoplinae) de la region atlantica meridional de Brasil Digamacris n. gen. (Orthoptera, Acrididae, Melanoplinae) from the Atlantic Meridional region of Brazil

Memorias do Instituto Oswaldo Cruz, 1989
Digamacris, a new genus of the Dichroplini (Acrididae, Melanoplinae) is described for the species Pezotettix amoenus Stal, 1878 and Dichroplus fratemus Carl, 1916, both included at present in the genus Dichroplus.
Carlos S. Carbonell
doaj   +1 more source

A new endemic pearl cichlid of the ‘Geophagus’ brasiliensis (Cichliformes: Cichlidae) species group from the Piranga River, upper Doce River basin, southeastern Brazil

Journal of Fish Biology, Volume 108, Issue 6, Page 1687-1700, June 2026.
Abstract A new species of pearl cichlid of the ‘Geophagus’ brasiliensis species group, endemic to the Piranga River, a major tributary of the upper Doce River basin in the state of Minas Gerais, southeastern Brazil, is herein described. The new species is delimited using an integrative approach, with molecular‐based species delimitation methods coupled
Cidimar E. de Assis, Jorge A. Dergam, Amanda F. Cunha, Valéria N. Machado, Tomas Hrbek, Natállia M. de F. Vicente, Victor de Queiroz, Elisabeth Henschel   +7 more
wiley   +1 more source

Ecological risk index for aquatic pollution control: a case study of coastal water bodies from the Rio de Janeiro State, southeastern Brazil [PDF]

Geochimica Brasiliensis, 2013
The Potential Ecological Risk Index (PERI) was proposed by Håkan-son in 1980 to be used as a diagnostic tool for water pollution. The aim of this study was to apply the PERI for tropical conditions, proposing modifications.
Cristiane da Silveira Fiori, Ana Paula de Castro Rodrigues, Ricardo Erthal Santelli, Renato Campello Cordeiro, Rodrigo Guerra Carvalheira, Patrícia Correa Araújo, Zuleica Carmen Castilhos, Edison Dausacker Bidone   +7 more
doaj  

Integrating multiple lines of evidence of sediment quality in a tropical bay (Guanabara Bay, Brazil)

Marine Pollution Bulletin, 2019
The present study evaluated the ecological risk of metal contamination in sediments of Guanabara Bay (GB) by combining multiple lines of evidence (LOEs). Chemical analysis and a set of whole-sediment toxicity assays were conducted with Tiburonella viscana, Kalliapseudes schubartii, Anomalocardia flexuosa, and Nitocra sp.
de Campos, Bruno Galvão, Moreira, Lucas Buruaem, Pauly, Guacira de Figueiredo Eufrasio, Cruz, Ana Carolina Feitosa, Monte, Christiane do Nascimento, Dias da Silva, Lílian Irene, Rodrigues, Ana Paula de Castro, Machado, Wilson, Abessa, Denis Moledo de Souza   +8 more
openaire   +4 more sources

Commercialization of the bioinvasive mussel Perna viridis (Linnaeus, 1758), in the municipality of Niterói, Rio de Janeiro, Brazil

Boletim do Instituto de Pesca
Ballast water is used by ships to ensure their operational safety and stability. However, the use of seawater as ballast can cause the dispersal of exotic marine species.
Carlos Eduardo de Freitas Guimarães Filho, Mariana Moysés Delorme, Flávia Aline Andrade Calixto, Maria Carmela Kasnowski, Eliana de Fátima Marques de Mesquita   +4 more
doaj   +1 more source

Caracterização da Contaminação por Petróleo e seus Derivados na Baía de Guanabara: Aplicação de Técnicas Organogeoquímicas e Organopetrográficas [PDF]

Anuário do Instituto de Geociências, 2003
The Guanabara Bay is the second bigger bay of the Brazilian coast. The bay is oneof most beautiful of the world and shelters an ample and protected natural environment,preponderant factor for the development of the region.
João Graciano Mendonça Filho, Taíssa Rego Menezes, E. Adriana de Oliveira, Michele B. Iemma   +3 more
doaj  

Método para classificação automática de padrões multiespectrais de imagens orbitais em águas costeiras

Brazilian Journal of Oceanography, 1980
This study is based essentially on the pattern recognition of concentrations of suspended solids from LANDSAT-2 imagery recorded on CCT's and processed through the IMAGE-100 system.
Renato Herz, Keiko Tanaka
doaj   +1 more source