Results 11 to 20 of about 284 (163)

Chromosomal characterization in two species of an Astyanax bimaculatus complex (Characidae, Characiformes) using different techniques of chromosome banding. [PDF]

Cytotechnology, 2016
Astyanax has been the subject of extensive cytogenetic studies due to its wide karyotypic diversity. This genus comprises species complexes, namely groups of fish of difficult morphological differentiation, such as the bimaculatus complex, which includes the characids with a rounded humeral spot.
Da Silva LL, Dos Santos AR, Giuliano-Caetano L, Dias AL.   +3 more
europepmc   +4 more sources

Freqüência de arraçoamento para alevinos de lambari do rabo-amarelo (Astyanax bimaculatus) Feeding frequency for yellow tail lambari (Astyanax bimaculatus) fingerlings

Revista Brasileira de Zootecnia, 2004
Este experimento foi realizado em um período de 30 dias, objetivando determinar a freqüência de arraçoamento (FA) ideal para o melhor desempenho de alevinos de lambari do rabo-amarelo (Astyanax bimaculatus).
Carmino Hayashi, Fábio Meurer, Wilson Rogério Boscolo, Carlos Henrique Figueiredo Lacerda, Lúcio César Barbosa Kavata   +4 more
doaj   +2 more sources

Growth hormone on ovarian morphology of lambaris (Astyanax bimaculatus) after induced spawning [PDF]

Ciencia Rural, 2019
ABSTRACT: Lambari, Astyanax bimaculatus, is an oviparous, multiple-spawning fish that is reproductively active throughout the year, which makes it promising for cultivation and research. This research histologically evaluates the ovaries of lambari that have undergone artificial spawning induced with pituitary extract (control group), and the effect ...
Lucas Marcon, Elizete Rizzo, Nilo Bazzoli   +2 more
exaly   +5 more sources

Freqüência de arraçoamento para alevinos de lambari do rabo-amarelo (Astyanax bimaculatus) [PDF]

Revista Brasileira De Zootecnia, 2004
Este experimento foi realizado em um período de 30 dias, objetivando determinar a freqüência de arraçoamento (FA) ideal para o melhor desempenho de alevinos de lambari do rabo-amarelo (Astyanax bimaculatus). Foram utilizados 120 alevinos de lambari com peso vivo inicial de 0,34 ± 0,01 g, distribuídos em 12 tanques-rede experimentais, em um delineamento
Wilson Boscolo, Carmino Hayashi, Fabio Meurer   +2 more
exaly   +4 more sources

Histological alterations in liver and testis of Astyanax aff. bimaculatus caused by acute exposition to zinc [PDF]

Revista Ceres, 2015
This study investigated the effect of acute exposition to zinc (Zn) on histology of the liver and testes of yellow tail lambari (Astyanax aff. bimaculatus). The exposure consisted of six concentrations of Zn (0, 3, 5, 10, 15, and 20 mg/L) for 96 hours of exposure.
Marli Cupertino, Juraci Oliveira, Sérgio Matta   +2 more
exaly   +5 more sources

Viabilidade de diferentes taxas de alimentação para o cultivo de Astyanax bimaculatus [PDF]

Revista de Ciências Agroveterinárias, 2018
O objetivo deste trabalho foi avaliar o desempenho zootécnico e custo de produção do quilograma do lambari do rabo amarelo (Astyanax bimaculatus) alimentados com diferentes taxas de arraçoamento.
Adolfo Jatobá
doaj   +2 more sources

Dieta de Astyanax bimaculatus (Linnaeus, 1758) (Characiformes, Characidae), da área de influência do reservatório de Corumbá, Estado de Goiás, Brasil

Acta Scientiarum: Biological Sciences, 2008
Com o objetivo de estudar a alimentação de Astyanax bimaculatus realizaram-se-se, no período de março de 1996 a fevereiro de 1997, amostragens mensais na área de influência do reservatório de Corumbá, agrupadas neste trabalho em três biótopos: Corumbá ...
Izabel de Fatima Andrian, Heloisa Baleroni Rodrigues Silva, Danielle Peretti   +2 more
doaj   +3 more sources

Morphological and temporal variation in early embryogenesis contributes to species divergence in Malawi cichlid fishes

Evolution &Development, Volume 25, Issue 2, Page 170-193, March 2023., 2023
Lake Malawi cichlids harbor a spectacular intra‐ and interspecific morphological diversity yet understanding of how early in ontogeny species‐specific phenotypes emerge remains limited. A comparative analysis of early development of three divergent Malawi cichlids reveals anatomical and timing differences during embryogenesis and indicates divergence ...
Aleksandra Marconi, Cassandra Zie Yang, Samuel McKay, M. Emília Santos   +3 more
wiley   +1 more source

Upper thermal tolerances and vulnerability to global warming in a Brazilian Caatinga fish Astyanax bimaculatus (Linnaeus, 1758) population

Austral Ecology, Volume 47, Issue 6, Page 1157-1161, September 2022., 2022
Abstract Global warming is predicted to increase both average temperatures and the frequency and duration of heat waves. Tropical ectotherms, particularly those living in warm environments are more prone to receive heat impacts. Then, it is crucial to identify those populations already exposed to high temperatures that may be at risk of decimation by ...
Andrés Egea‐Serrano, Maiara C. Alves, Mirco Solé, Miguel Tejedo   +3 more
wiley   +1 more source

Identification of Astyanax altiparanae (Teleostei, Characidae) in the Iguaçu River, Brazil, based on mitochondrial DNA and RAPD markers

Genetics and Molecular Biology, 2002
Astyanax fishes are among the most important food-web components of South America rivers. In the Iguaçu River basin, the Astyanax genus is represented mainly by endemic species.
Prioli Sônia M.A.P., Prioli Alberto J., Júlio Jr. Horácio F., Pavanelli Carla S., Oliveira Alessandra V. de, Carrer Helaine, Carraro Dirce M., Prioli Laudenir M.   +7 more
doaj   +3 more sources