Results 41 to 50 of about 2,449 (227)
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
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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
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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
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Glutamatergic control of a pattern-generating central nucleus in a gymnotiform fish [PDF]
Journal of Neurophysiology, 2020 Underpinnings of neuromodulation of central pattern-generating networks (CPG) have been well characterized in many species. The effects of fast neurotransmitter systems remain, however, poorly understood. This research uses in vitro electrophysiological and pharmacological techniques to show that the neurotransmitter control of a vertebrate CPG in ...
Virginia Comas, Michel Borde
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Regulation and modulation of electric waveforms in gymnotiform electric fish [PDF]
Journal of Comparative Physiology A, 2006 Weakly electric gymnotiform fish specialize in the regulation and modulation of the action potentials that make up their multi-purpose electric signals. To produce communication signals, gymnotiform fish modulate the waveforms of their electric organ discharges (EODs) over timescales spanning ten orders of magnitude within the animal's life cycle ...
Philip K, Stoddard +3 more
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Small fish, large variation: Morphological diversity of Weberian apparatus in Noturus catfishes and ecological implications. [PDF]
Anat Rec (Hoboken)Abstract The Weberian apparatus is a hearing specialization unique to the otophysan fishes, and an unexpected degree of morphological variation exists in species of the Noturus catfishes. Our aim in this study is to investigate relationships between morphological variations and ecology that may drive this variation.
Hoeflich JC, Liu J.
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Coding and processing of electrosensory information in gymnotiform fish [PDF]
Journal of Experimental Biology, 1989 ABSTRACT Studies of the electrosensory system of gymnotiform fish have revealed principles of neuronal coding and processing of information which also character-ize more advanced systems, such as vision and audition in higher vertebrates.
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Convergent evolution of locomotor morphology but not performance in gymnotiform swimmers [PDF]
Journal of Evolutionary Biology, 2018 AbstractConvergent evolution of a novel locomotor strategy implies that a fitness benefit may be associated with the new gait. Opportunities to study this phenomenon are often constrained by a lack of transitional taxa, but teleost fishes offer examples of extant species across such evolutionary shifts in gait.
Katrina R. Whitlow +2 more
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Neotropical Ichthyology, 2023 A new species of Eigenmannia is described from the upper rio Paraná basin based on morphological and molecular data. It is distinguished for all congeners by a unique combination of morphometrics, meristics, osteological characters, a significant COI ...
Vinicius de Carvalho Cardoso, G. Dutra
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Revista Científica Multidisciplinar Núcleo do Conhecimento, 2023 Gymnotiformes é uma ordem de peixes elétricos neotropicais composta por 270 espécies. Apresentam uma típica anatomia externa: corpo alongado, ausência de algumas nadadeiras e nadadeira anal bem desenvolvida. A característica mais marcante deste grupo é a
Thiago Alexandre Petersen +1 more
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