Diversification, sympatric speciation, and trophic polymorphism of Arctic charr, Salvelinus alpinus complex, in Transbaikalia

Alekseyev, S. S.; Самусенок, В. П.; Матвеев, А. Н.; Pichugin, Mikhail Yu.

doi:10.1007/978-94-017-1352-8_8

Cited by 49 publications

(91 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The data (table 1) therefore cannot differentiate between these hypotheses. However, analysis of meristic data from a subset of these lakes suggests that different sympatric morphotypes are more closely related than allopatric populations of the same morphotype, thus supporting a sympatric origin of morphotypes (Alekseyev et al 2002). This observation seems to rule out the invasion hypothesis but leaves the second alternative hypothesis intact.…”

Section: Comparison With Data On Arctic Charmentioning

confidence: 87%

“…2k ϩ 1 The subsequent reduced polymorphism is very stable, such as the single-locus dimorphisms observed in figure 2b. Table 1 was modified from Alekseyev et al (1998Alekseyev et al ( , 1999Alekseyev et al ( , 2002 and supplemented with new information about additional lakes (S. Alekseyev, personal communication). The table shows data on 22 lakes in Transbaikalia, Russia.…”

Section: Effect Of Model Parameters On the Speciation Delaymentioning

confidence: 99%

“…Examples are sticklebacks, whitefish pumpkinseed, and bluegill sunfishes ). We focus on arctic char (Salvelinus alpinus), for which the degree of polymorphism varies between one and four morphotypes per lake (Alekseyev et al 2002;Adams et al 2003;Skú lason and Snorrason 2004). The explanation for the frequent but variable polymorphism in freshwater fish species is still a matter of debate and may differ for different lake systems.…”

mentioning

confidence: 99%

“…Alternatively, the morphotypes may originate sympatrically as a consequence of adaptive sympatric speciation. Evidence for sympatric (within-lake) origin of arctic char morphotypes stems from both genetic (Gíslason et al 1999) and morphological studies (Alekseyev et al 2002). In both scenarios, disruptive selection is an essential force driving and maintaining the sympatric divergence and coexistence of morphotypes.…”

mentioning

confidence: 99%

See 3 more Smart Citations

The Effect of Population Size and Recombination on Delayed Evolution of Polymorphism and Speciation in Sexual Populations

Claessen¹,

Andersson²,

Persson³

et al. 2008

The American Naturalist

View full text Add to dashboard Cite

The effect of population size and recombination on delayed evolution of polymorphism and speciation in sexual populations Claessen, D.; Andersson, J.; Persson, L.; de Roos, A.M. Published in:American Naturalist DOI:10.1086/588062Link to publication Citation for published version (APA):Claessen, D., Andersson, J., Persson, L., & de Roos, A. M. (2008). The effect of population size and recombination on delayed evolution of polymorphism and speciation in sexual populations. American Naturalist, 172(1), E18-E34. DOI: 10.1086/588062 General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. abstract: Recent theory suggests that absolute population size may qualitatively influence the outcome of evolution under disruptive selection in asexual populations. Large populations are predicted to undergo rapid evolutionary branching; however, in small populations, the waiting time to branching increases steeply with decreasing abundance, and below a critical size, the population remains monomorphic indefinitely. Here, we (1) extend the theory to sexual populations and (2) confront its predictions with empirical data, testing statistically whether lake size affects the level of resource polymorphism in arctic char (Salvelinus alpinus) in 22 lakes of different sizes. For a given level of recombination, our model predicts qualitatively similar relations between population size and time to evolutionary branching (either speciation or evolution of genetic polymorphism) as the asexual model, while recombination further increases the delay to branching. The loss of polymorphism at certain loci, an inherent aspect of multilocus-trait evolution, may increase the delay to speciation, resulting in stable genetic polymorphism without speciation. The empirical analysis demonstrates that the occurrence of resource polymorphism depends on both lake size and the number of coexisting fish species. For a given number of coexisting species, the level of polymorphism increases significantly with lake size, thus confirming our model prediction.

show abstract

Section: Comparison With Data On Arctic Charmentioning

confidence: 87%

Section: Effect Of Model Parameters On the Speciation Delaymentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

The Effect of Population Size and Recombination on Delayed Evolution of Polymorphism and Speciation in Sexual Populations

Claessen¹,

Andersson²,

Persson³

et al. 2008

The American Naturalist

View full text Add to dashboard Cite

show abstract

“…Specifically, our work supports the idea that post-glacial populations of fishes may diverge into discrete ecomorphological forms in sympatry subsequent to colonization of novel, heterogonous post-glacial habitats. Although empirical examples of divergence occurring sympatrically are still relatively rare (Bolnick and Fitzpatrick, 2007), more studies supporting this scenario are becoming available (for example, Barluenga et al, 2006), including an increasing number involving north temperate fishes (Taylor and Bentzen, 1993;Gíslason et al, 1999;Lu et al, 2001;Alekseyev et al, 2002;Praebel et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Evolution and origin of sympatric shallow-water morphotypes of Lake Trout, Salvelinus namaycush, in Canada’s Great Bear Lake

et al. 2014

View full text Add to dashboard Cite

Range expansion in north-temperate fishes subsequent to the retreat of the Wisconsinan glaciers has resulted in the rapid colonization of previously unexploited, heterogeneous habitats and, in many situations, secondary contact among conspecific lineages that were once previously isolated. Such ecological opportunity coupled with reduced competition likely promoted morphological and genetic differentiation within and among post-glacial fish populations. Discrete morphological forms existing in sympatry, for example, have now been described in many species, yet few studies have directly assessed the association between morphological and genetic variation. Morphotypes of Lake Trout, Salvelinus namaycush, are found in several large-lake systems including Great Bear Lake (GBL), Northwest Territories, Canada, where several shallow-water forms are known. Here, we assess microsatellite and mitochondrial DNA variation among four morphotypes of Lake Trout from the five distinct arms of GBL, and also from locations outside of this system to evaluate several hypotheses concerning the evolution of morphological variation in this species. Our data indicate that morphotypes of Lake Trout from GBL are genetically differentiated from one another, yet the morphotypes are still genetically more similar to one another compared with populations from outside of this system. Furthermore, our data suggest that Lake Trout colonized GBL following dispersal from a single glacial refugium (the Mississippian) and support an intra-lake model of divergence. Overall, our study provides insights into the origins of morphological and genetic variation in post-glacial populations of fishes and provides benchmarks important for monitoring Lake Trout biodiversity in a region thought to be disproportionately susceptible to impacts from climate change.

show abstract

Morphological divergence between three Arctic charr morphs – the significance of the deep‐water environment

Skoglund

Siwertsson

Amundsen

et al. 2015

Ecology and Evolution

View full text Add to dashboard Cite

Morphological divergence was evident among three sympatric morphs of Arctic charr (Salvelinus alpinus (L.)) that are ecologically diverged along the shallow-, deep-water resource axis in a subarctic postglacial lake (Norway). The two deep-water (profundal) spawning morphs, a benthivore (PB-morph) and a piscivore (PP-morph), have evolved under identical abiotic conditions with constant low light and temperature levels in their deep-water habitat, and were morphologically most similar. However, they differed in important head traits (e.g., eye and mouth size) related to their different diet specializations. The small-sized PB-morph had a paedomorphic appearance with a blunt head shape, large eyes, and a deep body shape adapted to their profundal lifestyle feeding on submerged benthos from soft, deep-water sediments. The PP-morph had a robust head, large mouth with numerous teeth, and an elongated body shape strongly related to their piscivorous behavior. The littoral spawning omnivore morph (LO-morph) predominantly utilizes the shallow benthic–pelagic habitat and food resources. Compared to the deep-water morphs, the LO-morph had smaller head relative to body size. The LO-morph exhibited traits typical for both shallow-water benthic feeding (e.g., large body depths and small eyes) and planktivorous feeding in the pelagic habitat (e.g., streamlined body shape and small mouth). The development of morphological differences within the same deep-water habitat for the PB- and PP-morphs highlights the potential of biotic factors and ecological interactions to promote further divergence in the evolution of polymorphism in a tentative incipient speciation process. The diversity of deep-water charr in this study represents a novelty in the Arctic charr polymorphism as a truly deep-water piscivore morph has to our knowledge not been described elsewhere.

show abstract

Diversification, sympatric speciation, and trophic polymorphism of Arctic charr, Salvelinus alpinus complex, in Transbaikalia

Cited by 49 publications

References 7 publications

The Effect of Population Size and Recombination on Delayed Evolution of Polymorphism and Speciation in Sexual Populations

The Effect of Population Size and Recombination on Delayed Evolution of Polymorphism and Speciation in Sexual Populations

Evolution and origin of sympatric shallow-water morphotypes of Lake Trout, Salvelinus namaycush, in Canada’s Great Bear Lake

Morphological divergence between three Arctic charr morphs – the significance of the deep‐water environment

Contact Info

Product

Resources

About