Results 1 to 10 of about 3,173 (211)
Early Biogeography of Otophysi Points to the Neotropics as the Cradle of Characiphysan Fishes [PDF]
Ecology and EvolutionFreshwaters represent less than 1% of Earth's surface and only 0.02% of the available aquatic habitable volume, yet they host nearly half of the 35,500 known species of bony fishes.
Achille Lenglin +9 more
doaj +3 more sources
Three new species of the Eigenmannia trilineata species group (Gymnotiformes: Sternopygidae) from northwestern South America [PDF]
Neotropical Ichthyology, 2020 Eigenmannia is one of the more taxonomically complex genera within the Gymnotiformes. Here we adopt an integrative taxonomic approach, combining osteology, COI gene sequences, and geometric morphometrics to describe three new species belonging to the E ...
Edgar Esteban Herrera Collazos +2 more
exaly +3 more sources
Genetics and Molecular Biology, 2015 Several types of sex chromosome systems have been recorded among Gymnotiformes, including male and female heterogamety, simple and multiple sex chromosomes, and different mechanisms of origin and evolution.
Júlio César Pieczarka +1 more
exaly +3 more sources
Genetics and Molecular Biology, 2008 A karyotype analysis of the electric eel, Electrophorus electricus (Teleostei, Gymnotiformes), a strongly electric fish from northern South America, is presented.
Fabio Porto-Foresti
exaly +3 more sources
Are NORs Always Located on Homeologous Chromosomes? A FISH Investigation with rDNA and Whole Chromosome Probes in Gymnotus Fishes (Gymnotiformes) [PDF]
PLoS ONE, 2013 Gymnotus (Gymnotiformes, Gymnotidae) is the most diverse known Neotropical electric knife fish genus. Cytogenetic studies in Gymnotus demonstrate a huge karyotypic diversity for this genus, with diploid numbers ranging from 34 to 54.
Malcolm A Ferguson-Smith, Fausto Foresti
exaly +2 more sources
eLife, 2022 Brain region size generally scales allometrically with brain size, but mosaic shifts in brain region size independent of brain size have been found in several lineages and may be related to the evolution of behavioral novelty.
Erika L Schumacher, Bruce A Carlson
doaj +1 more source
Comparable ages for the independent origins of electrogenesis in African and South American weakly electric fishes. [PDF]
PLoS ONE, 2012 One of the most remarkable examples of convergent evolution among vertebrates is illustrated by the independent origins of an active electric sense in South American and African weakly electric fishes, the Gymnotiformes and Mormyroidea, respectively ...
Sébastien Lavoué +5 more
doaj +1 more source
Fish, Sorocaba river sub-basin, state of São Paulo, Brazil [PDF]
Check List, 2007 In this paper we present a list of the fish fauna of Sorocaba river sub-basin. Fish were caught with gillnets, sieves and puçás, a sort of funnel net. We listed 71 species, distributed in 7 orders, 22 families and 50 genera. Characiformes are represented
Welber Smith +2 more
doaj +5 more sources
Spooky Interaction at a Distance in Cave and Surface Dwelling Electric Fishes
Frontiers in Integrative Neuroscience, 2020 Glass knifefish (Eigenmannia) are a group of weakly electric fishes found throughout the Amazon basin. Their electric organ discharges (EODs) are energetically costly adaptations used in social communication and for localizing conspecifics and other ...
Eric S. Fortune +6 more
doaj +1 more source
Illustrated list of additions to the ichthyofauna of the Caura River, Venezuela [PDF]
Check List, 2012 Twenty nine species have been added to the annotated checklists of the ichthyofauna of the Caura River Basin, Guiana Shield, Venezuela. Of these, 18 were found in two floodplain lagoons in the lower Caura, corresponding to the orders Characiformes ...
Nirson González +3 more
doaj +3 more sources