Results 21 to 30 of about 247 (152)

Nematodes as indicators of environmental changes in a river with different levels of anthropogenic impact [PDF]

open access: yesAnais da Academia Brasileira de Ciências, 2023
Considering that changes in the biodiversity of parasite communities can be used as indicators of ecosystem health, the aim of this study was to investigate the potential use of Geophagus brasiliensis parasites as bioindicators of environmental changes ...
ATSLER LUANA LEHUN   +2 more
doaj   +1 more source

The Cichlidae fish Geophagus brasiliensis (Quoy & Gaimard, 1824) has suitability as a sentinel species for changes caused by xenobiotics?

open access: yesActa Scientiarum: Biological Sciences, 2022
Industrial wastewater and agricultural practices are among the main activities discharging organic pollutants, such as Polychlorinated biphenyl (PCB) congeners and organochlorine insecticides (e.g.
Claudio Nona Morado   +3 more
doaj   +1 more source

A meta‐analytic review of monoterpene for fish anaesthesia

open access: yesFish and Fisheries, Volume 24, Issue 3, Page 367-380, May 2023., 2023
Abstract The use of anaesthetic agents has been increasing to address the welfare needs of different fish species in scientific and aquaculture practices. MS‐222 is the most used synthetic anaesthetic but some limitations and side effects have been reported.
Luís Félix   +3 more
wiley   +1 more source

Individual variation in feeding morphology, not diet, can facilitate the success of generalist species in urban ecosystems

open access: yesEcology and Evolution, Volume 11, Issue 24, Page 18342-18356, December 2021., 2021
The success generalist species in urban systems is often related to a plastic diet and feeding‐related traits that allow them to take advantage of a variety of food subsidies provided by humans in cities. The classification of a species as generalist is commonly based on mean estimates of diet and feeding traits.
Piatã Marques   +3 more
wiley   +1 more source

Diversity in visual sensitivity across Neotropical cichlid fishes via differential expression and intraretinal variation of opsin genes

open access: yesMolecular Ecology, Volume 30, Issue 8, Page 1880-1891, April 2021., 2021
Abstract The visual system of vertebrates has greatly contributed to our understanding of how different molecular mechanisms shape adaptive phenotypic diversity. Extensive work on African cichlid fishes has shown how variation in opsin gene expression mediates diversification as well as convergent evolution in colour vision.
Julián Torres‐Dowdall   +3 more
wiley   +1 more source

Metacercariae of Diplostomum compactum Lutz, 1928 (Trematoda, Diplostomidae) in the eyes of acara Geophagus brasiliensis Quoy & Gaimard, 1824 (Teleostei, Cichlidae) from Barra Bonita Reservoir - São Paulo, Brazil Metacercária do Diplostomum compactum Lutz, 1928 (Trematoda: Diplostomidae) em olhos de acará Geophagus brasiliensis Quoy & Gaimard, 1824 (Teleostei: Cichlidae) no reservatório de Barra Bonita - São Paulo

open access: yesArquivo Brasileiro de Medicina Veterinária e Zootecnia, 2006
Relata-se a ocorrência de metacercárias de Diplostomum compactum (Trematoda: Diplostomidae) infectando Geophagus brasiliensis (Teleostei: Cichlidae) do reservatório de Barra Bonita, rio Tietê, estado de São Paulo, Brasil. As metacercárias foram coletadas
J.L.C. Novaes   +3 more
doaj   +1 more source

On some trematodes parasites of fishes from Paraná River [PDF]

open access: yesBrazilian Journal of Biology, 2001
Crassicutis cichlasomae Manter, 1936 is redescribed for the first time in South America and from a new host: Geophagus brasiliensis (Cichlidae). Iheringtrema iheringi Travassos, 1948 is redescribed for the first time since its original description from ...
B. M. M. FERNANDES, A. KOHN
doaj   +1 more source

Soluble malate dehydrogenase of Geophagus brasiliensis (Cichlidae, Perciformes): isolated isoforms and kinetics properties

open access: yesGenetics and Molecular Biology, 2008
Kinetic properties and thermal stabilities of Geophagus brasiliensis skeletal muscle unfractionated malate dehydrogenase (MDH, EC 1.1.1.37) and its isolated isoforms were analyzed to examine a possible sMDH-B* locus duplication in a fixation process ...
Maria Regina de Aquino-Silva   +4 more
doaj   +1 more source

Sphincterodiplostomum musculosum (Digenea, Diplostomidae) in Geophagus brasiliensis (Perciformes, Cichlidae) collected in a lake at Dois Córregos, São Paulo, Brazil

open access: yesCiência Rural, 2015
: Geophagus brasiliensis is a freshwater cichlid distributed throughout the whole South America. It is a territorial fish, generally omnivorous, which preferentially inhabits the bottom of water bodies.
Rodrigo Severiano Rocha   +4 more
doaj   +1 more source

Metacercárias de Neascus sp. em Geophagus brasiliensis (Perciformes: Cichlidae) do rio do Peixe, Juiz de Fora, Brasil - DOI: 10.4025/actascibiolsci.v30i3.493

open access: yesActa Scientiarum: Biological Sciences, 2008
A metacercária de Neascus sp., causadora da doença dos pontos pretos, é descrita em espécimes de Geophagus brasiliensis coletados no Brasil. Entre março e maio de 2006, foram capturados 33 espécimes de G.
Adriano Reder Carvalho   +2 more
doaj   +1 more source

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