02068nas a2200157 4500008004100000245015900041210006900200260001600269520141200285100001701697700002101714700002501735700002201760700002301782856010501805 2020 eng d00aGenetic drift does not sufficiently explain patterns of electric signal variation among populations of the mormyrid electric fish Paramormyrops kingsleyae0 aGenetic drift does not sufficiently explain patterns of electric cJan-04-20213 a

Communication signals serve crucial survival and reproductive functions. In Gabon, the widely distributed mormyrid fish Paramormyrops kingsleyae emits an electric organ discharge (EOD) signal with a dual role in communication and electrolocation that exhibits remarkable variation: populations of P. kingsleyae have either biphasic or triphasic EODs, a feature that characterizes interspecific signal diversity among the Paramormyrops genus. We quantified variation in EODs of 327 P. kingsleyae from nine populations and compared it to genetic variation estimated from microsatellite loci. We found no correlation between electric signal and genetic distances, suggesting that EOD divergence cannot be explained by drift alone. An alternative hypothesis is that EOD differences are used for mate discrimination, which would require P. kingsleyae be capable of differentiating between divergent EOD waveforms. Using a habituation-dishabituation assay, we found that P. kingsleyae can discriminate between biphasic and triphasic EOD types. Nonetheless, patterns of genetic and electric organ morphology divergence provide evidence for hybridization between these signal types. Although reproductive isolation with respect to signal type is incomplete, our results suggest that EOD variation in P. kingsleyae could be a cue for assortative mating.

1 aPicq, Sophie1 aSperling, Joshua1 aCheng, Catherine, J.1 aCarlson, Bruce, A1 aGallant, Jason, R. uhttp://doi.wiley.com/10.1111/evo.13953https://onlinelibrary.wiley.com/doi/am-pdf/10.1111%2Fevo.1395301906nas a2200145 4500008004100000245010200041210006900143260001600212520136600228100002301594700002201617700002001639700002201659856007901681 2017 eng d00aThe genome and adult somatic transcriptome of the mormyrid electric fish Paramormyrops kingsleyae0 agenome and adult somatic transcriptome of the mormyrid electric  cDec-12-20173 a

Several studies have begun to elucidate the genetic and developmental processes underlying major vertebrate traits. Few of these traits have evolved repeatedly in vertebrates, preventing the analysis of molecular mechanisms underlying these traits comparatively. Electric organs have evolved multiple times among vertebrates, presenting a unique opportunity to understand the degree of constraint and repeatability of the evolutionary processes underlying novel vertebrate traits. As there is now a completed genome sequence representing south american electric eels, we were motivated to obtain genomic sequence from a linage that independently evolved electric organs to facilitate future comparative analyses of the evolution and development of electric organs. We report here the sequencing and de-novo assembly of the genome of the mormyrid Paramormyrops kingsleyae using short-read sequencing. In addition, we have completed a somatic transcriptome from 11 tissues to construct a gene expression atlas of predicted genes from this assembly, enabling us to identify candidate housekeeping genes as well as genes differentially expressed in the major somatic tissues of the mormyrid electric fish. We anticipate that this resource will greatly facilitate comparative studies on the evolution and development of electric organs and electroreceptors.

1 aGallant, Jason, R.1 aLosilla, Mauricio1 aTomlinson, Chad1 aWarren, Wesley, C uhttp://academic.oup.com/gbe/advance-article/doi/10.1093/gbe/evx265/4731783