Multiple rearrangements in cryptic species of electric knifefish, Gymnotus carapo (Gymnotidae, Gymnotiformes) revealed by chromosome painting. [PDF]
, 2010 BACKGROUND: Gymnotus (Gymnotidae, Gymnotiformes) is the Neotropical electric fish genus with the largest geographic distribution and the largest number of species, 33 of which have been validated.
de Souza, Augusto CP +5 more
core +2 more sources
Melanocortins regulate the electric waveforms of gymnotiform electric fish [PDF]
Hormones and Behavior, 2009 The hypothalamic-pituitary-adrenal/interrenal axis couples serotonergic activity in the brain to the peripheral regulators of energy balance and response to stress. The regulation of peripheral systems occurs largely through the release of peptide hormones, especially the melanocortins (adrenocorticotropic hormone [ACTH] and alpha melanocyte ...
Michael R, Markham +3 more
openaire +2 more sources
Sexual dimorphism in the electric knifefish, Gymnorhamphichthys rondoni (Rhamphichthyidae: Gymnotiformes) [PDF]
Acta Amazonica, 2019 Sexual dimorfism refers to morphological differences between males and females of a species. It may be a result of different selection pressures acting on either or both sexes and may occur in any sexually-reproducing dioecious species, including fishes.
Elisa Queiroz GARCIA, Jansen ZUANON
doaj +1 more source
Non-Native Species Abundance Decreases the Co-Occurrence Between Native and Non-Native Species Through Time at Any Phylogenetic Distance. [PDF]
Ecol LettWe investigate how non‐native species can impact native species in a 30‐year time scale by estimating the co‐occurrence between native and non‐native species pairs. We show that interannual variability of non‐native species abundance could be more important than long‐term abundance trends in determining the effects of non‐native species through time ...
Rodrigues AC +4 more
europepmc +2 more sources
Extensive Karyotype Reorganization in the Fish Gymnotus arapaima (Gymnotiformes, Gymnotidae) Highlighted by Zoo-FISH Analysis. [PDF]
, 2018 The genus Gymnotus (Gymnotiformes) contains over 40 species of freshwater electric fishes exhibiting a wide distribution throughout Central and South America, and being particularly prevalent in the Amazon basin.
Ferguson-Smith, Malcolm A +5 more
core +2 more sources
Hydrological Connectivity Enhances Fish Biodiversity in Amazonian Mining Ponds: Insights From eDNA and Traditional Sampling. [PDF]
Mol EcolABSTRACT Artisanal and small‐scale gold mining (ASGM) expansion in the Madre de Dios region of the Peruvian Amazon has transformed primary forests into a novel wetland complex of thousands of abandoned mining ponds. Despite their ecological relevance, post‐mining recovery of these systems remains understudied, particularly regarding fish biodiversity ...
Timana-Mendoza C +7 more
europepmc +2 more sources
The complete mitochondrial genome sequences of five Otophysi species (Vertebrata, Teleostei)
Mitochondrial DNA. Part B. Resources, 2019 Complete mitochondrial genomes of the characiform fishes Astyanax fasciatus, Astyanax altiparanae, Hoplias malabaricus (Karyomorph A) and the Gymnotiformes species Gymnotus sylvius and Gymnotus cuia were characterized in the present study.
Rodrigo Milan Calegari +5 more
doaj +1 more source
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.
Adauto Lima Cardoso +2 more
doaj +1 more source
Fishes of the Vermelho River, São Lourenço River basin, Mato Grosso state, Brazil [PDF]
Check List, 2013 We present a list of ichthyofauna of the Vermelho River, a tributary of the São Lourenço River, Paraguay basin. Fishes were caught with seine nets measuring approximately 10 m in total length and with a mesh size of 0.5 cm.
Reinaldo de Castro, Patrícia Vizzotto
doaj +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.
Soraia B.A. Fonteles +8 more
doaj +1 more source