Please use this identifier to cite or link to this item: https://repositorio.inpa.gov.br/handle/1/17261
Title: Evolution of electric communication signals in the South American ghost knifefishes (Gymnotiformes: Apteronotidae): A phylogenetic comparative study using a sequence-based phylogeny
Authors: Smith, Adam R.
Proffitt, Melissa R.
Ho, Winnie W.
Mullaney, Claire B.
Maldonado-Ocampo, Javier Alejandro
Lovejoy, Nathan R.
Alves-Gomes, José Antônio
Smith, G. Troy
Keywords: Adontosternarchus
Animals Tissue
Apteronotus
Chirp
Compsaraia
Cytochrome C Oxidase Subunit 1 Gene
Cytochrome Oxidase B Gene
Electric Fish
Electric Organ Discharge
Electricity
Electrocommunication Signal
Evolution
Frequency Modulation
Gene
Gymnotiformes
Magosternarchus
Molecular Phylogeny
Nonhuman
Orthosternarchus Tamandua
Parapteronotus
Porotergus
Recombination Activating Gene 2
Sequence Analysis
Signal Transduction
Social Behavior
Species Diversity
Sternarchella
Sternarchogiton
Sternarchorhamphus
Sternarchorhynchus Mormyrus
Animals
Animals Communication
Classification
Electric Organ
Evolution
Genetics
Gymnotiformes
Phylogeny
Physiology
South America
Fish Protein
Animals Communication
Animal
Biological Evolution
Electric Organ
Fish Proteins
Gymnotiformes
Phylogeny
South America
Issue Date: 2016
metadata.dc.publisher.journal: Journal of Physiology Paris
metadata.dc.relation.ispartof: Volume 110, Número 3, Pags. 302-313
Abstract: The electric communication signals of weakly electric ghost knifefishes (Gymnotiformes: Apteronotidae) provide a valuable model system for understanding the evolution and physiology of behavior. Apteronotids produce continuous wave-type electric organ discharges (EODs) that are used for electrolocation and communication. The frequency and waveform of EODs, as well as the structure of transient EOD modulations (chirps), vary substantially across species. Understanding how these signals have evolved, however, has been hampered by the lack of a well-supported phylogeny for this family. We constructed a molecular phylogeny for the Apteronotidae by using sequence data from three genes (cytochrome c oxidase subunit 1, recombination activating gene 2, and cytochrome oxidase B) in 32 species representing 13 apteronotid genera. This phylogeny and an extensive database of apteronotid signals allowed us to examine signal evolution by using ancestral state reconstruction (ASR) and phylogenetic generalized least squares (PGLS) models. Our molecular phylogeny largely agrees with another recent sequence-based phylogeny and identified five robust apteronotid clades: (i) Sternarchorhamphus + Orthosternarchus, (ii) Adontosternarchus, (iii) Apteronotus + Parapteronotus, (iv) Sternarchorhynchus, and (v) a large clade including Porotergus, ‘Apteronotus’, Compsaraia, Sternarchogiton, Sternarchella, and Magosternarchus. We analyzed novel chirp recordings from two apteronotid species (Orthosternarchus tamandua and Sternarchorhynchus mormyrus), and combined data from these species with that from previously recorded species in our phylogenetic analyses. Some signal parameters in O. tamandua were plesiomorphic (e.g., low frequency EODs and chirps with little frequency modulation that nevertheless interrupt the EOD), suggesting that ultra-high frequency EODs and “big” chirps evolved after apteronotids diverged from other gymnotiforms. In contrast to previous studies, our PGLS analyses using the new phylogeny indicated the presence of phylogenetic signals in the relationships between some EOD and chirp parameters. The ASR demonstrated that most EOD and chirp parameters are evolutionarily labile and have often diversified even among closely related species. © 2016
metadata.dc.identifier.doi: 10.1016/j.jphysparis.2016.10.002
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