Results 11 to 20 of about 12,679 (227)

Water Parameters and Hydrodynamics in Rivers and Caves Hosting Astyanax mexicanus Populations Reveal Macro-, Meso- and Microhabitat Characteristics. [PDF]

Ecol Evol
From 2009 to 2025, we have recorded the physicochemical parameters of the water and the hydrological regimes at localities hosting Astyanax mexicanus cavefish and surface fish populations in Mexico. Sampling 13 caves and 30 surface stations revealed strong signatures of the two macrohabitats, but also significant differences in specific water ...
Legendre L, Père S, Rebaudo F, Espinasa L, Attia J, Rétaux S.   +5 more
europepmc   +2 more sources

Characterization of Mitochondrial Genomes and Evolutionary Relationships in Two <i>Moenkhausia</i> (Characiformes: Acestrorhamphidae). [PDF]

Ecol Evol
This study successfully decoded the complete mitochondrial genomes of two Moenkhausia species, with total lengths of 16,439 and 16,461 bp, respectively. This study enhances genomic resources for Acestrorhamphidae and provides a foundation for investigating evolutionary mechanisms and developing molecular markers.
Sun CH, Chen XD, Zhan YJ, Xu Y, Lu CH.
europepmc   +2 more sources

Genetic Mapping of Orofacial Traits Reveals a Single Genomic Region Associated With Differences in Multiple Parameters of Jaw Size Between Astyanax mexicanus Surface and Cavefish. [PDF]

Evol Dev
By performing a genetic association study in cave × surface fish F2 hybrids, we discovered that premaxilla width, dentary length, and maxillary length are all significantly associated with a region on Chromosome 13 containing 109 genes. ABSTRACT The regulation of bone size is a poorly understood and complex developmental process.
Powers AK, Amaismeier A, Thiel K, Anyonge W, McGaugh SE, Boggs TE, Tabin CJ, Gross JB.   +7 more
europepmc   +2 more sources

Linking rivers, mixing faunas: How artificial connectivity between the Middle and Upper Paraná River basins shapes fish diversity in a tributary of the Itaipu Reservoir, Brazil. [PDF]

J Fish Biol
Abstract This work aimed to investigate the distribution and occurrence of fish species along the São Francisco Falso Braço Norte (SFFBN) River basin, a tributary of the Middle Paraná River basin now artificially connected to the Upper Paraná ecoregion, to evaluate how such connectivity may affect the biogeographic distribution and regional composition
Kampfert LEP, Maicrovicz JC, Blanco DR, Lange D, Pavanelli CS, Brandão H.   +5 more
europepmc   +2 more sources

Food resource partitioning among species of Astyanax (Characiformes: Characidae) in the Lower Iguaçu River and tributaries, Brazil [PDF]

Neotropical Ichthyology, 2019
Resource partitioning allows for interspecific coexistence and is frequently reported for similar species. Here, we predicted the existence of resource partitioning among species of Astyanax that co-occur in the Low Iguaçu River and tributaries in Brazil.
Suelen F. R. Pini, Milza C. F. Abelha, Elaine A. L. Kashiwaqui, Rosilene L. Delariva, Sergio Makrakis, Maristela C. Makrakis   +5 more
doaj   +1 more source

A redescription of Astyanax gymnodontus (Eigenmann, 1911), new combination, a polymorphic characid fish from the rio Iguaçu basin, Brazil

Neotropical Ichthyology
Astyanax gymnodontus (Eigenmann, 1911), new combination, a polymorphic characid fish endemic to the Rio Iguaçu basin in Southern Brazil, is redescribed.
Carla Simone Pavanelli, Carlos Alexandre Miranda Oliveira   +1 more
doaj   +1 more source

Basic cytogenetics and physical mapping of ribosomal genes in four Astyanax species (Characiformes, Characidae) collected in Middle Paraná River, Iguassu National Park: considerations on taxonomy and systematics of the genus

Comparative Cytogenetics, 2015
Karyotypes and chromosomal characteristics of both minor and major rDNAs in four fish species known popularly as “lambaris”, namely Astyanax abramis (Jenyns, 1842), Astyanax asuncionensis Géry, 1972, Astyanax correntinus (Holmberg, 1891) and Astyanax sp.
Leonardo Paiz, Lucas Baumgärtner, Weferson Júnio da Graça, Vladimir Margarido   +3 more
doaj   +1 more source

Highlighting Astyanax Species Diversity through DNA Barcoding. [PDF]

PLoS ONE, 2016
DNA barcoding has been used extensively to solve taxonomic questions and identify new species. Neotropical fishes are found in a wide variety of shapes and sizes, with a large number of species yet to be described, many of which are very difficult to ...
Bruno César Rossini, Carlos Alexandre Miranda Oliveira, Filipe Augusto Gonçalves de Melo, Vinicius de Araújo Bertaco, Juan M Díaz de Astarloa, Juan J Rosso, Fausto Foresti, Claudio Oliveira   +7 more
doaj   +1 more source

Cytogenetic markers as a tool for characterization of hybrids of Astyanax Baird &amp; Girard, 1854 and Hyphessobrycon Eigenmann, 1907 [PDF]

Comparative Cytogenetics, 2020
Astyanax Baird et Girard, 1854, is one of the largest genera in the family Characidae and comprises 177 valid species. This genus has been the focus of cytogenetic studies primarily owing to the presence of B chromosomes and high karyotypic diversity ...
Caio Augusto Gomes Goes, Sandro Natal Daniel, Lucas Henrique Piva, George Shigueki Yasui, Roberto Ferreira Artoni, Diogo Teruo Hashimoto, Fausto Foresti, Fábio Porto-Foresti   +7 more
doaj   +3 more sources

The piranha genome provides molecular insight associated to its unique feeding behavior [PDF]

, 2019
The piranha enjoys notoriety due to its infamous predatory behavior but much is still not understood about its evolutionary origins and the underlying molecular mechanisms for its unusual feeding biology.
Adolfi, Mateus, Fischer, Petra, Kneitz, Susanne, Meyer, Axel, Minx, Patrick, Schartl, Manfred, Schmidt, Cornelia, Tomlinson, Chad, Volkoff, Helene, Warren, Wesley C   +9 more
core   +2 more sources