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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 +3 more
wiley +2 more sources
Identification of Astyanax altiparanae (Teleostei, Characidae) in the Iguaçu River, Brazil, based on mitochondrial DNA and RAPD markers [PDF]
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. +7 more
doaj +4 more sources
Karyotypic diversity among three species of the genus Astyanax (Characiformes: Characidae)
Brazilian Journal of BiologyThe group Incertae sedis within the Characidae family currently includes 88 genera, previously included in the subfamily Tetragonopterinae. Among them is the genus Astyanax comprising a group of species with similar morphology and widely distributed in ...
P. B. Nishiyama +5 more
doaj +2 more sources
Sex disparities determined by biometric and hematological measurements in Astyanax bimaculatus [PDF]
Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2020 This study aimed to compare the body indexes and hematological characteristics between Astyanax bimaculatus males and females. Four hundred fish were randomly distributed into four polyethylene tanks (100 fish/unit) in a recirculation system and fed four
M.O. Pereira +6 more
doaj +5 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 +2 more
exaly +5 more sources
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 +3 more
europepmc +4 more sources
Comparative cytogenetics in Astyanax (Characiformes: Characidae) with focus on the cytotaxonomy of the group [PDF]
Neotropical Ichthyology, 2013 Astyanax is a diverse group of Neotropical fishes, whose different forms occupy different environments. This great diversity is also reflected on cytogenetic aspects and molecular markers, which have repeatedly been demonstrated by cytogenetic studies ...
Renata Cristina Claudino de Oliveira Tenório +4 more
doaj +3 more sources
Neotropical Ichthyology, 2022 This study aimed to identify species of Astyanax bimaculatus group from four Itaipu Reservoir tributaries (Paraná River Basin) by cytogenetics and molecular markers (COI) to investigate the possible occurrence of cryptic diversity in part of this basin ...
Sandro Tonello +2 more
exaly +3 more sources
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 +4 more
doaj +2 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 Do Carmo Cupertino +1 more
exaly +5 more sources