scholarly journals STRONG ASSORTATIVE MATING BY DIET, COLOR, SIZE, AND MORPHOLOGY BUT LIMITED PROGRESS TOWARD SYMPATRIC SPECIATION IN A CLASSIC EXAMPLE: CAMEROON CRATER LAKE CICHLIDS

Evolution ◽  
2013 ◽  
Vol 67 (7) ◽  
pp. 2114-2123 ◽  
Author(s):  
Christopher H. Martin
Keyword(s):  
Assortative Mating ◽  
Crater Lake ◽  
Sympatric Speciation ◽  
Size And Morphology

scholarly journals Sympatric speciation in Nicaraguan crater lake cichlid fish

Nature ◽  
2006 ◽  
Vol 439 (7077) ◽  
pp. 719-723 ◽  
Author(s):  
Marta Barluenga ◽  
Kai N. Stölting ◽  
Walter Salzburger ◽  
Moritz Muschick ◽  
Axel Meyer
Keyword(s):  
Crater Lake ◽  
Cichlid Fish ◽  
Sympatric Speciation

Sympatric speciation suggested by monophyly of crater lake cichlids

Nature ◽  
1994 ◽  
Vol 368 (6472) ◽  
pp. 629-632 ◽  
Author(s):  
Ulrich K. Schliewen ◽  
Diethard Tautz ◽  
Svante Pääbo
Keyword(s):  
Crater Lake ◽  
Sympatric Speciation

scholarly journals Sympatric Speciation in Threespine Stickleback: Why Not?

2011 ◽  
Vol 2011 ◽  
pp. 1-15 ◽  
Author(s):  
Daniel I. Bolnick
Keyword(s):  
Sexual Dimorphism ◽  
Assortative Mating ◽  
Intraspecific Competition ◽  
Gasterosteus Aculeatus ◽  
Theoretical Models ◽  
Sympatric Speciation ◽  
Threespine Stickleback ◽  
Disruptive Selection ◽  
Evolutionary Diversification ◽  
Trait Variance

Numerous theoretical models suggest that sympatric speciation is possible when frequency-dependent interactions such as intraspecific competition drive disruptive selection on a trait that is also subject to assortative mating. Here, I review recent evidence that both conditions are met in lake populations of threespine stickleback (Gasterosteus aculeatus). Nonetheless, sympatric speciation appears to be rare or absent in stickleback. If stickleback qualitatively fit the theoretical requirements for sympatric speciation, why do they not undergo sympatric speciation? I present simulations showing that disruptive selection and assortative mating in stickleback, though present, are too weak to drive speciation. Furthermore, I summarize empirical evidence that disruptive selection in stickleback drives other forms of evolutionary diversification (plasticity, increased trait variance, and sexual dimorphism) instead of speciation. In conclusion, core assumptions of sympatric speciation theory seem to be qualitatively reasonable for stickleback, but speciation may nevertheless fail because of (i) quantitative mismatches with theory and (ii) alternative evolutionary outcomes.

Emergence and loss of assortative mating in sympatric speciation

2009 ◽  
Vol 258 (3) ◽  
pp. 465-477 ◽  
Author(s):  
Fabiano Ribeiro ◽  
Nestor Caticha
Keyword(s):  
Assortative Mating ◽  
Sympatric Speciation

scholarly journals Complex histories of repeated gene flow in Cameroon crater lake cichlids cast doubt on one of the clearest examples of sympatric speciation

Evolution ◽  
2015 ◽  
Vol 69 (6) ◽  
pp. 1406-1422 ◽  
Author(s):  
Christopher H. Martin ◽  
Joseph S. Cutler ◽  
John P. Friel ◽  
Cyrille Dening Touokong ◽  
Graham Coop ◽  
...  
Keyword(s):  
Gene Flow ◽  
Crater Lake ◽  
Sympatric Speciation ◽  
Cast Doubt

Conditions for sympatric speciation: A diploid model incorporating habitat fidelity and non-habitat assortative mating

1996 ◽  
Vol 10 (2) ◽  
pp. 187-205 ◽  
Author(s):  
Paul A. Johnson ◽  
F. C. Hoppensteadt ◽  
James J. Smith ◽  
Guy L. Bush
Keyword(s):  
Assortative Mating ◽  
Sympatric Speciation ◽  
Habitat Fidelity ◽  
Diploid Model

scholarly journals Don’t throw out the sympatric species with the crater lake water: fine-scale investigation of introgression provides weak support for functional role of secondary gene flow in one of the clearest examples of sympatric speciation

2017 ◽  
Author(s):  
Emilie J. Richards ◽  
Jelmer W. Poelstra ◽  
Christopher H. Martin
Keyword(s):  
Gene Flow ◽  
Crater Lake ◽  
Morphological Diversity ◽  
Sympatric Speciation ◽  
Sympatric Species ◽  
Fine Scale ◽  
Ancestral Polymorphism ◽  
Hybrid Swarm ◽  
Weak Support ◽  
History Of

AbstractGenomic data has revealed complex histories of colonization and repeated gene flow previously unrecognized in some of the most celebrated examples of sympatric speciation and radiation. However, much of the evidence for secondary gene flow into these radiations comes from genome-wide tests, which tells us little about how gene flow potentially influenced sympatric diversification. Here we investigated whole genomes of Barombi Mbo crater lake cichlids for fine-scale patterns of introgression between species with neighboring riverine cichlid populations. We did find evidence of secondary gene flow into the radiation scattered across < 0.24% of the genome; however, the functional and genetic diversity in these regions paint no clear picture of how that variation could have contributed to the ecological and morphological diversity found in the lake. Our results suggest that either variation in novel genetic pathways introduced during secondary gene flow contributed to the radiation, or that secondary gene flow was predominantly neutral with respect to the diversification processes. We also found evidence for differential assortment of ancestral polymorphism found in riverine populations between sympatric sister species, suggesting the presence of a hybrid swarm in the past. While the history of gene flow and colonization appears to be more complicated than once thought, the lack of compelling evidence for secondary gene flow influencing diversification suggests that we should not yet rule out one of the most celebrated examples of sympatric speciation in nature.

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