Results 61 to 70 of about 774 (171)

Aggression and dominance in cichlids in resident-intruder tests: the role of environmental enrichment

open access: yesNeotropical Ichthyology
When establishing dominance residents have a greater likelihood to dominate intruders than vice versa, partially because the resident has more to loose that the intruder has to win. This is known as the prior residency effect.
Vincent Nijman, Boudewijn A. Heuts
doaj   +1 more source

Da ação da saponina sobre peixes: Guarus (Poecilia sp.) e Acarás (Geophagus sp.)

open access: yesRevista da Faculdade de Medicina Veterinária, Universidade de São Paulo, 1945
The experience were made either with saponina solutions or with aqueous maceration of "saboneteira" (Sapindus saponaria). The activity of this macerations equivalent to 1% saponin solution J. D. Riedel, was greater and old solutions did not show modifications of toxic effects. The authors observed that the toxic effect of such venon on some fish genera
José De Fatis Tabarelli Neto   +1 more
openaire   +2 more sources

Multi-taxon trends and the application of genotoxic biomarkers in the analysis of effluents from sewage treatment plant. [PDF]

open access: yesHeliyon, 2023
Freitas RMP   +4 more
europepmc   +1 more source

Ecologia da comunidade de metazoários parasitos do acará Geophagus brasiliensis (Quoy e Gaimard, 1824) (Perciformes: Cichlidae) do rio Guandu, Estado do Rio de Janeiro, Brasil = Ecology of the community of metazoan parasites of acará Geophagus brasiliensis (Quoy e Gaimard, 1824) (Perciformes: Cichlidae) from Guandu river, State of Rio de Janeiro, Brazil

open access: yesActa Scientiarum: Biological Sciences, 2006
Foram estudados 50 acarás Geophagus brasiliensis (Quoy e Gaimard, 1824) provenientes do rio Guandu, coletados próximo à barragem da Estação de Tratamento de Água (ETA) (22°48’32”S, 43º37’35”O), no Estado do Rio de Janeiro, no período de dezembro de 2004 ...
Rodney Kozlowiski de Azevedo   +2 more
doaj  

Angling sport fishing in Lobo-Broa reservoir (Itirapina, SP, Brazil)

open access: yesBrazilian Journal of Biology
The objective of this paper was to study angling from September, 2002 to September, 2004 in the Lobo-Broa Reservoir, Itirapina, SP (22° 15' S and 47° 49' W).
JMA. Pereira   +2 more
doaj   +1 more source

Low levels of crustacean parasite infestation in fish species from the Matapi River in the state of Amapá, Brazil

open access: yesRevista Brasileira de Parasitologia Veterinária
This first study investigated the crustacean parasite fauna in 66 species of fish from the Matapi River basin, state of Amapá (Brazil). Fish were collected every two months between March 2012 and August 2013, encompassing dry and rainy seasons. Among the
Ligia Rigôr Neves, Marcos Tavares-Dias
doaj   +1 more source

Molecular identification of Austrodiplostomum sp., an eye parasite among farmed tambaqui in Amazonia. [PDF]

open access: yesGenet Mol Biol, 2023
Farias EF   +7 more
europepmc   +1 more source

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

open access: yesRevista Brasileira de Parasitologia Veterinária
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   +6 more
doaj   +1 more source

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