Multiple Cases of Striking Genetic Similarity Between Alternate Electric Fish Signal Morphs in Sympatry

Arnegard, Matthew E.; Bogdanowicz, Steven M.; Hopkins, Carl D.

doi:10.1554/04-237r

Cited by 15 publications

(22 citation statements)

References 123 publications

(53 reference statements)

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“…This common phenomenon is related to the balance between mutational processes within populations and gene flow between them (Hutchison and Templeton 1999). This issue was not limited to geographical distance: some F st values determined in this analysis exceeded previously reported F st values between nominal Paramormyrops species by Arnegard et al (2005), which, measured in sympatry were equal to 0.3 or lower.…”

Section: Cc-by-nc-nd 40 International License Peer-reviewed) Is the contrasting

confidence: 43%

“…First, Gallant et al (2011) ruled out several adaptive explanations for intraspecific EOD diversity within P. kingsleyae given the small magnitude of phase P0, together with lack of correlated variation in EOD waveform with environmental variables, predators or sympatric species. Second, a previous study provided evidence of substantial genetic partitioning between two allopatric populations of P. kingsleyae in southern Gabon (Arnegard et al, 2005), motivating the hypothesis that genetic drift between geographically isolated populations sufficiently explained the pattern of EOD signal variation among P. kingsleyae. Third, Gallant et al (2011) To test the overall hypothesis that genetic drift is sufficient to explain patterns of EOD diversity between geographically isolated populations of P. kingsleyae, we examined variation in population genetic structure using microsatellite genotyping within and between P. kingsleyae populations with divergent EOD signal types across Gabon, and found that EOD variation is highly correlated with patterns of genetic variation between populations.…”

Section: The Study Systemmentioning

confidence: 95%

“…We extracted DNA from the ethanol-preserved fin clips using DNeasy Tissue Kits by Arnegard et al (2005) were re-genotyped for this study so that genotypes could be scored using identical criteria. We amplified DNA at each of five microsatellite loci (NBB001-NBB005) originally identified by Arnegard et al (2005) …”

Section: Microsatellite Genotypingmentioning

confidence: 99%

“…We amplified DNA at each of five microsatellite loci (NBB001-NBB005) originally identified by Arnegard et al (2005) …”

Section: Microsatellite Genotypingmentioning

confidence: 99%

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Genetic drift does not sufficiently explain patterns of electric signal variation among populations of the mormyrid electric fishParamormyrops kingsleyae

Picq

Sperling

Cheng

et al. 2017

Preprint

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This study examines evolutionary causes underlying the maintenance of diversity in electric courtship signals (EODs) emitted by the mormyrid electric fish species Paramormyrops kingsleyae. P. kingsleyae are polymorphic for an EOD feature which characterizes interspecific signal diversity among the rapidly diverged Paramormyrops genus. We collected 338 specimens and recorded EOD signals from 9 populations distributed throughout Gabon, west central Africa, collected in 1999Africa, collected in -2009. First, we demonstrate using microsatellite genotyping a significant signature of isolation by distance between populations. Second, utilizing principal components analysis of 21 landmarks measured from EOD waveforms, we find that EOD duration and the magnitude of a small head negative pre-potential (P0) are highly correlated with patterns of spatial and genetic structure. Finally, utilizing a behavioral assay, we demonstrate that P. kingsleyae individuals can discriminate between P0-absent and P0-present EOD waveforms, although genetic and morphological analysis indicate no assortative mating between signal types. Together, these results support the hypothesis that patterns of signal variation in P. kingsleyae have resulted from genetic drift acting upon isolated populations. As P. kingsleyae represents a microcosm of signal diversity among mormyrids, these findings illustrate a potential mechanism by which interspecific patterns of EOD diversity may originate at the population level.

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Section: Cc-by-nc-nd 40 International License Peer-reviewed) Is the contrasting

confidence: 43%

Section: The Study Systemmentioning

confidence: 95%

Section: Microsatellite Genotypingmentioning

confidence: 99%

“…We amplified DNA at each of five microsatellite loci (NBB001-NBB005) originally identified by Arnegard et al (2005) …”

Section: Microsatellite Genotypingmentioning

confidence: 99%

See 2 more Smart Citations

Genetic drift does not sufficiently explain patterns of electric signal variation among populations of the mormyrid electric fishParamormyrops kingsleyae

Picq

Sperling

Cheng

et al. 2017

Preprint

View full text Add to dashboard Cite

show abstract

“…However, these species pairings using commercially acquired specimens did not include closest relatives and, therefore, the question of whether or not differentiation of IDI patterns was driving speciation remained unresolved. Other studies examining speciation in close mormyrid relatives include those of Arnegard et al (2005) (focussing on EOD waveform polymorphism in Brienomyrus species) and Arnegard et al (2006Arnegard et al ( , 2010 and Gallant et al (2011), the latter focussing on electric organ morphology. Arnegard et al (2006) focussed EOD features coded by knollenorgan electroreceptor organs, and Arnegard et al (2010) on ecological divergence.…”

Section: Introductionmentioning

confidence: 99%

Sexual selection by female choice prevents speciation reversal in a hybridizing trio of mormyrid fish in southern Africa: evidence from playback experiments of electric organ discharges

Schmid

Kramer

2014

Behav

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We studied the question of whether or not female choice among variant forms of species-specific male advertising signals, electric organ discharges (EODs), is a factor in preventing panmixy in a parapatric sibling complex of three species of mormyrid fish, inhabiting three parallel rivers in southern Africa. The three species' EODs are characteristically differentiated in waveform. The Upper Zambezi River is inhabited by Pollimyrus marianne Kramer, van der Bank, Flint, SauerGürth & Wink, 2003, the Okavango River by P. castelnaui (Boulenger, 1911), and the smaller Kwando River in their middle by P. cuandoensis Kramer, van der Bank & Wink, 2013, which is their hybrid species of unidirectional origin. P. castelnaui females (N = 4 out of 5) and P. marianne females (N = 5 of 5) responded stronger to playback of the EODs of male conspecifics compared to those of male P. cuandoensis. Pollimyrus castelnaui and P. marianne females neither preferred nor discriminated against the male EODs of each other's species, respectively (one exception). The single P. cuandoensis female available preferred a P. marianne male EOD over one of its own species, and was neutral in all other tests. This suggests that female resistance in the two main system species to P. cuandoensis male EODs is an evolved one, effectively limiting hybridization to the Kwando. The females of the two main system species, P. castelnaui and P. marianne, thus prevent panmixy in the Okavango and the Zambezi, respectively, thereby keeping up the threesibling species complex by discriminating female choice against P. cuandoensis males in the Okavango-Kwando-Zambezi system. Keywords

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Intragenus F1-hybrids of African weakly electric fish (Mormyridae: Campylomormyrus tamandua ♂ × C. compressirostris ♀) are fertile

et al. 2020

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Hybridization is widespread in fish and constitutes an important mechanism in fish speciation. There is, however, little knowledge about hybridization in mormyrids. F1-interspecies hybrids between Campylomormyrus tamandua ♂ × C. compressirostris ♀ were investigated concerning: (1) fertility; (2) survival of F2-fish and (3) new gene combinations in the F2-generation concerning the structure of the electric organ and features of the electric organ discharge. These F1-hybrids achieved sexual maturity at about 12–13.5 cm total length. A breeding group comprising six males and 13 females spawned 28 times naturally proving these F1-fish to be fertile. On average 228 eggs were spawned, the average fertilization rate was 47.8%. Eggs started to hatch 70–72 h after fertilization, average hatching rate was 95.6%. Average mortality rate during embryonic development amounted to 2.3%. Average malformation rate during the free embryonic stage was 27.7%. Exogenous feeding started on day 11. In total, we raised 353 normally developed larvae all of which died consecutively, the oldest specimen reaching an age of 5 months. During survival, the activities of the larval and adult electric organs were recorded and the structure of the adult electric organ was investigated histologically.

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Multiple Cases of Striking Genetic Similarity Between Alternate Electric Fish Signal Morphs in Sympatry

Cited by 15 publications

References 123 publications

Genetic drift does not sufficiently explain patterns of electric signal variation among populations of the mormyrid electric fishParamormyrops kingsleyae

Genetic drift does not sufficiently explain patterns of electric signal variation among populations of the mormyrid electric fishParamormyrops kingsleyae

Sexual selection by female choice prevents speciation reversal in a hybridizing trio of mormyrid fish in southern Africa: evidence from playback experiments of electric organ discharges

Intragenus F1-hybrids of African weakly electric fish (Mormyridae: Campylomormyrus tamandua ♂ × C. compressirostris ♀) are fertile

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