Results 71 to 80 of about 284 (163)

Feeding ecology of stream-dwelling Characidae (Osteichthyes: Characiformes) from the upper Tocantins River, Brazil

Zoologia (Curitiba), 2013
In this contribution we studied the trophic ecology of four Characidae species from the Cavalo Stream, upper Tocantins River, considering diet overlap and trophic niche breadth.
Maíra Moraes, Carla Ferreira Rezende, Rosana Mazzoni   +2 more
doaj   +1 more source

Effect of food frequency on the growth of the lambari, astyanax bimaculatus (Characiformes, Characidae)

, 2022
The lambari, Astyanax bimaculatus, is one of the native species with zootechnical potential for aquaculture, and stands out with desirable characteristics for cultivation, therefore, studies regarding the ideal amount of food are necessary to improve the zootechnical performance of the species.
Santos, Ricardo Pinto dos, França, Caroline Lopes, Sousa, Wanderson Diego Reis, Silva, João Mandú da, Pinheiro, Thiago Ferreira, Teixeira, Erivania Gomes   +5 more
openaire   +1 more source

Cytogenetic toxicity and gonadal effects of 17 α-methyltestosterone in Astyanax bimaculatus (Characidae) and Oreochromis niloticus (Cichlidae)

Genetics and Molecular Research, 2013
The synthetic hormone, 17-α-methyltestosterone (MT), is used in fish hatcheries to induce male monosex. Androgenic effects on various fish species have been reported; however, few studies have assessed possible genotoxic effects, although there are concerns about such effects in target and non-target species.
C L G, Rivero-Wendt, A L, Miranda-Vilela, M F N, Ferreira, A M, Borges, C K, Grisolia   +4 more
openaire   +2 more sources

Performance of lambari-do-rabo-amarelo Astyanax bimaculatus (Linnaeus, 1758) fed diets based on adult black soldier fly meal: analysis of its effectiveness as a substitute for fish meal [PDF]

Brazilian Journal of Biology
This study evaluated the performance of the lambari-do-rabo-amarelo Astyanax bimaculatus fed diets containing BSF adult fly meal, replacing fishmeal. Two hundred juveniles were distributed in 20 tanks, with five levels of substitution (0%, 12.5%, 25%, 37.
E .O. Souza, M. R. Zeferino, L. R. Periard, L. P. Gonçalves-Junior, J. G. Vargas-Junior, P. P. Mendonça   +5 more
doaj   +1 more source

Immunohistochemical, morphological and histometrical analyses of follicular development in Astyanax bimaculatus (Teleostei: Characidae) exposed to an organochlorine insecticide

Ecotoxicology and Environmental Safety, 2017
Thiodan® is an organochlorine insecticide used in agriculture that can reach aquatic ecosystems where it can affect fish reproduction. This research aimed to evaluate follicular development and the expression of integrin β1, collagen type IV and caspase 3 by morphological, histometrical and immunohistochemical analyses of Astyanax bimaculatus exposed ...
Lucas, Marcon, Ralph Gruppi, Thomé, Ann Honor, Mounteer, Nilo, Bazzoli, Elizete, Rizzo, Laércio Dos Anjos, Benjamin   +5 more
openaire   +3 more sources

Frequency in the supply of Lactobacillus influence its probiotic effect for yellow tail lambari

Ciência Rural, 2018
: The aim of this research was to evaluate the changes in intestinal tract microbiota, hematological parameters and zootechnical indexes of yellowtail lambaris (Astyanax bimaculatus) fed with different probiotic supply frequencies (Lactobacillus spp ...
Adolfo Jatobá, Klayton Natan Moraes, Emanuel Fernandes Rodrigues, Leandro Marcolino Vieira, Marina Oliveira Pereira   +4 more
doaj   +1 more source

Parasitological diagnosis in food fish produced in a fish farm, in the Zona da Mata, Minas Gerais, southeastern Brazil

Revista Brasileira de Parasitologia Veterinária, 2020
This study identified the parasitic species in juvenile freshwater finfishes during the fattening stage, from a fish farm located in the Zona da Mata (MG), southeastern Brazil, and revealed both macro and microscopical lesions in fish gills.
Rachel Sordi Relvas, Simone de Carvalho Balian, Herbert Sousa Soares, Maurício Laterça Martins, Pedro Henrique Magalhães Cardoso   +4 more
doaj   +1 more source

Diversity of Parasites in Two Sympatric Species of Brazilian Tetras (Characiformes: Acestrorhamphidae) in the Caatinga Domain, Northeastern Brazil

Parasitologia
This study investigates the parasitic biodiversity of the fish species Astyanax bimaculatus and Psalidodon fasciatus in a stream located in the Chapada do Araripe Environmental Protection Area (APA), state of Ceará, Brazil, contributing to the ...
Bruno Anderson Fernandes da Silva, Julia Martini Falkenberg, Fábio Hideki Yamada   +2 more
doaj   +1 more source

CURVAS DE MATURAÇÃO GONADAL E CRESCIMENTO DE Fí­Å MEAS DE TAMBIí­Å¡, Astyanax bimaculatus LINNAEUS, 1758 (CHARACIFORMES, CHARACIDAE), NA REPRESA DE IBITINGA, ESTADO DE SÃO PAULO, BRASIL.

Boletim do Instituto de Pesca, 2018
Neste trabalho foram analisadas 379 fêmeas de tambiú, Astyanax bimaculatus, com a finalidade de determinar o comprimento e a idade em que se inicia a primeira maturação gonadal.
Ricardo Amaro dos SANTOS, Elmar Cardozo CAMPOS, Jaime José Casari da CAMARA, José MANDELLI JUNIOR   +3 more
doaj  

Profile of micronucleus frequencies and DNA damage in different species of fish in a eutrophic tropical lake

Genetics and Molecular Biology, 2009
Lake Paranoá is a tropical reservoir for the City of Brasilia, which became eutrophic due to inadequate sewage treatment associated with intensive population growth.
Cesar K. Grisolia, Carla L. G. Rivero, Fernando L. R. M. Starling, Izabel C. R. da Silva, Antonio C. Barbosa, Jose G. Dorea   +5 more
doaj