TY - JOUR
T1 - Mitogenomics of Central American weakly-electric fishes
AU - Aguilar, Celestino
AU - Miller, Matthew J.
AU - Loaiza, Jose R.
AU - Krahe, Rüdiger
AU - De León, Luis F.
N1 - Funding Information:
We thank the anonymous reviewers for valuable comments and suggestions. We also thank the Ecological and Evolutionary Genomics Laboratory (EEGL) at STRI, Panama, and the Biology Department at the University of Massachusetts Boston for support and training during the development of this project. This work was funded by the Secretaría Nacional de Ciencia, Tecnología e Innovación (SENACYT, Panamá) in the form of an international internship to CA, and grants (No. ITE12-002 , FID16-116 ) to LFD. Additional support was provided by Instituto para la Formación y Aprovechamiento de los Recursos Humanos (IFARHU-SENACYT) in the form of a doctoral fellowship to CA, and the University of Massachusetts Boston to LFD. JRL was also supported by the Sistema Nacional de Investigación (SNI;157-2017).
Publisher Copyright:
© 2018
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2019/2/20
Y1 - 2019/2/20
N2 - Electric fishes are a diverse group of freshwater organisms with the ability to generate electric organ discharges (EODs) that are used for communication and electrolocation. This group (ca. 200 species) has originated in South America, and six species colonized the Central American Isthmus. Here, we assembled the complete mitochondrial genomes (mitogenomes) for three Central American electric fishes (i.e. Sternopygus dariensis, Brachyhypopomus occidentalis, and Apteronotus rostratus), and, based on these data, explored their phylogenetic position among Gymnotiformes. The three mitogenomes show the same gene order, as reported for other fishes, with a size ranging from 16,631 to 17,093 bp. We uncovered a novel 60 bp intergenic spacer (IGS) located between the COII and tRNALys genes, which appears to be unique to the Apteronotidae. Furthermore, phylogenetic relationships supported the traditional monophyly of Gymnotiformes, with the three species positioned within their respective family. In addition, the genus Apteronotus belongs to the early diverging lineage of the order. Finally, we found high sequence divergence (13%) between our B. occidentalis specimen and a sequence previously reported in GenBank, suggesting that the prior mitogenome of B. occidentalis represents a different South American species. Indeed, phylogenetic analyses using Cytochrome b gene across the genus placed the previously reported individual within B. bennetti. Our study provides novel mitogenome resources that will advance our understanding of the diversity and phylogenetic history of Neotropical fishes.
AB - Electric fishes are a diverse group of freshwater organisms with the ability to generate electric organ discharges (EODs) that are used for communication and electrolocation. This group (ca. 200 species) has originated in South America, and six species colonized the Central American Isthmus. Here, we assembled the complete mitochondrial genomes (mitogenomes) for three Central American electric fishes (i.e. Sternopygus dariensis, Brachyhypopomus occidentalis, and Apteronotus rostratus), and, based on these data, explored their phylogenetic position among Gymnotiformes. The three mitogenomes show the same gene order, as reported for other fishes, with a size ranging from 16,631 to 17,093 bp. We uncovered a novel 60 bp intergenic spacer (IGS) located between the COII and tRNALys genes, which appears to be unique to the Apteronotidae. Furthermore, phylogenetic relationships supported the traditional monophyly of Gymnotiformes, with the three species positioned within their respective family. In addition, the genus Apteronotus belongs to the early diverging lineage of the order. Finally, we found high sequence divergence (13%) between our B. occidentalis specimen and a sequence previously reported in GenBank, suggesting that the prior mitogenome of B. occidentalis represents a different South American species. Indeed, phylogenetic analyses using Cytochrome b gene across the genus placed the previously reported individual within B. bennetti. Our study provides novel mitogenome resources that will advance our understanding of the diversity and phylogenetic history of Neotropical fishes.
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U2 - 10.1016/j.gene.2018.11.045
DO - 10.1016/j.gene.2018.11.045
M3 - Article
C2 - 30453071
AN - SCOPUS:85057125735
VL - 686
SP - 164
EP - 170
JO - Gene
JF - Gene
SN - 0378-1119
ER -