Results 11 to 20 of about 1,784 (198)

Metacercárias de Diplostomidae (Digenea: Diplostomoidea) em Geophagus brasiliensis (Perciformes: Cichlidae) do rio Guandu, Estado do Rio de Janeiro, Brasil - doi: 10.4025/actascibiolsci.v34i2.5957

Acta Scientiarum: Biological Sciences, 2011
O presente trabalho teve como objetivo o estudo qualitativo e quantitativo das metacercárias de diplostomídeos em Geophagus brasiliensis (Quoy & Gaimard, 1824) do rio Guandu, Seropédica, Rio de Janeiro, Brasil.
Adriano Reder de Carvalho, Rodney Kozlowiski de Azevedo, Vanessa Doro Abdallah, José Luis Fernando Luque   +3 more
doaj   +3 more sources

Metazoan parasites of Geophagus brasiliensis (Perciformes: Cichlidae) in Patos lagoon, extreme south of Brazil [PDF]

Revista Brasileira de Parasitologia Veterinária, 2015
This study has evaluated the parasitic fauna of 79 pearl cichlids (Geophagus brasiliensis) from the estuary of Patos Lagoon (31° 57' S and 52° 06' W), Rio Grande do Sul, Brazil, during the months of May and June in 2011 and 2012.
Gabriela Lopes Rassier, Tatiana Cheuiche Pesenti, Joaber Pereira Júnior, Diego Silva da Silva, Emília Welter Wendt, Cassandra de Moraes Monteiro, Maria Elizabeth Aires Berne   +6 more
doaj   +4 more sources

GROWTH OF Geophagus brasiliensis REARED AT DIFFERENT TEMPERATURES AND FEEDING REGIMES

Boletim do Instituto de Pesca, 2021
The aim of this study was to evaluate the growth performance of Geophagus brasiliensis rearedb under distinct temperatures (24.3 ± 0.9, 28.1 ± 1.0, and 31.7 ± 0.8°C) and feeding regimes (apparent satiety and a supply of 4% of the total biomass ...
Leone de Souza MEDINA, Maurício Gustavo Coelho EMERENCIANO, Fábio BITTENCOURT, Giovanni Lemos de MELLO   +3 more
doaj   +2 more sources

Active eDNA Is More Cost‐Effective Than Fyke Nets or Passive eDNA Collection When Monitoring the Invasion of an Alien Freshwater Fish

Environmental DNA
Monitoring alien species is critical to their management. However, early detection of invading alien freshwater fish can be challenging due to the difficulty of observing fish in low abundance.
Lenore Morris, Leah S. Beesley, Emma R. Stevens, Daniel C. Gwinn, Josephine Hyde, Suzanne Thompson, Deirdre B. Gleeson, Michael M. Douglas   +7 more
doaj   +2 more sources

Toxicity of naphthalene in the Neotropical Fish Astyanax Lacustris (Characiformes: Characidae) and Geophagus Brasiliensis (Perciformes: Cichlidae) [PDF]

Evidência, 2017
Polycyclic aromatic hydrocarbons are one of the most important organic pollutants in environmental studies. The aim of this study was to assess the naphthalene acute toxicity in two fish species, Astyanax lacustris (LLcust, 1875) and Geophagus ...
Geonildo Rodrigo Disner, Sabrina Louise Moraes Calado, Helena Cristina Silva Assis, Marta Margarete Cestari   +3 more
doaj   +3 more sources

Utilização de eugenol como anestésico em juvenis de Geophagus brasiliensis

Boletim do Instituto de Pesca, 2018
O eugenol, substí­¢ncia ativa do óleo de cravo, tem demonstrado ser eficiente e seguro como anestésico para peixes. Neste estudo foram avaliados os efeitos de diferentes concentrações de eugenol na anestesia, tempo de recuperação, glicemia e percentual ...
Andréa Ferretto da ROCHA, Marcia Regina STECH, Marcus Frederico Martins PINHEIRO, Danielle Machado PAGANI, Camila Fiaux SUKEKAVA   +4 more
doaj   +1 more source

Rapid morphological change in multiple cichlid ecotypes following the damming of a major clearwater river in Brazil. [PDF]

Evol Appl, 2020
Abstract While anthropogenic disturbances can have damaging effects on biodiversity, they also offer an opportunity to understand how species adapt to new environments and may even provide insights into the earliest stages of evolutionary diversification. With these topics in mind, we explored the morphological changes that have occurred across several
Gilbert MC, Akama A, Fernandes CC, Albertson RC.   +3 more
europepmc   +2 more sources

Urbanization can increase the invasive potential of alien species. [PDF]

J Anim Ecol, 2020
This paper looks at how urbanization enhances the success of invaders by changing species traits. The authors find that urbanization provides high food quality and quantity, which allows invasive guppies to increase body size and condition, number of offspring and population density. This suggests that urbanization promotes a highly invasive phenotype.
Santana Marques P, Resende Manna L, Clara Frauendorf T, Zandonà E, Mazzoni R, El-Sabaawi R.   +5 more
europepmc   +2 more sources

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

Anais 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, GISELE S.C. DUARTE, RICARDO M. TAKEMOTO   +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?

Acta 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, Magda Fernandes de Andrade-Tubino, Benjamin Carvalho Teixeira Pinto, Francisco Gerson Araujo   +3 more
doaj   +1 more source