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Linked References

1. S. Wright, “Evolution in Mendelian populations,” Genetics, vol. 16, no. 2, pp. 97–159, 1931. View at Scopus
2. S. C. Stearns, “The role of development in the evolution of life histories,” in Evolution and Development, J. T. Bonner, Ed., pp. 237–258, Springer, Berlin, Germany, 1982.
3. D. A. Levin, “Plasticity, canalization and evolutionary stasis in plants,” in Plant Population Ecology, A. J. Davy, M. J. Hutchings, and A. R. Watkinson, Eds., pp. 35–45, Blackwell Scientific, 1988.
4. J. Clausen, “Principles for a joint attack on evolutionary problems,” in Proceedings of the 6th International Congress of Genetics, D. F. Jones, Ed., vol. 2, pp. 21–23, Brooklyn Botanic Garden, Ithaca, NY, USA, 1932.
5. R. K. Clements, J. M. Baskin, and C. C. Baskin, “The comparative biology of the two closely-related species Penstemon tenuiflorus Pennell and P. hirsutus (L.) Willd. (Scrophulariaceae, section Graciles): I. Taxonomy and geographical distribution,” Castanea, vol. 63, no. 2, pp. 138–153, 1998. View at Scopus
6. P. B. Reich, I. J. Wright, J. Cavender-Bares et al., “The evolution of plant functional variation: traits, spectra, and strategies,” International Journal of Plant Sciences, vol. 164, no. 3, pp. S143–S164, 2003. View at Scopus
7. U. Dieckmann and M. Heino, “Probabilistic maturation reaction norms: their history, strengths, and limitations,” Marine Ecology-Progress Series, vol. 335, pp. 253–269, 2007. View at Publisher · View at Google Scholar · View at Scopus
8. M. G. Palacios, A. M. Sparkman, and A. M. Bronikowski, “Developmental plasticity of immune defence in two life-history ecotypes of the garter snake, thamnophis elegans - a common-environment experiment,” Journal of Animal Ecology, vol. 80, no. 2, pp. 431–437, 2011. View at Publisher · View at Google Scholar · View at PubMed
9. J. M. Baldwin, “A new factor in evolution,” American Naturalist, vol. 30, pp. 441–451, 1896.
10. C. H. Waddington, “Canalization of development and the inheritance of acquired characters,” Nature, vol. 150, no. 3811, pp. 563–565, 1942. View at Scopus
11. C. H. Waddington, “Genetic assimilation of acquired characters,” Evolution, vol. 7, no. 4676, pp. 118–126, 1953. View at Publisher · View at Google Scholar · View at Scopus
12. Schmalhausen II, Factors of Evolution, Blakiston, Philadelphia, Pa, USA, 1949.
13. M. J. West-Eberhard, “Alternative adaptations, speciation, and phylogeny,” Proceedings of the National Academy of Sciences of the United States of America, vol. 83, no. 5, pp. 1388–1392, 1986. View at Scopus
14. M. J. West-Eberhard, “Phenotypic plasticity and the origins of diversity,” Annual review of Ecology and Systematics, vol. 20, pp. 249–278, 1989. View at Scopus
15. M. J. West-Eberhard, Developmental Plasticity and Evolution, Oxford University Press, Oxford, UK, 2003.
16. C. D. Schlichting, “The role of phenotypic plasticity in diversification,” in Phenotypic Plasticity: Functional and Conceptual Approaches, T. J. DeWitt and S. M. Scheiner, Eds., pp. 191–200, Oxford University Press, 2004.
17. M. J. West-Eberhard, “Developmental plasticity and the origin of species differences,” Proceedings of the National Academy of Sciences of the United States of America, vol. 102, no. 1, pp. 6543–6549, 2005. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
18. G. F. Grether, “Environmental change, phenotypic plasticity, and genetic compensation,” The American Naturalist, vol. 166, no. 4, pp. E115–123, 2005. View at Scopus
19. T. D. Price, “Phenotypic plasticity, sexual selection and the evolution of colour patterns,” Journal of Experimental Biology, vol. 209, no. 12, pp. 2368–2376, 2006. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
20. E. Crispo, “The Baldwin effect and genetic assimilation: revisiting two mechanisms of evolutionary change mediated by phenotypic plasticity,” Evolution, vol. 61, no. 11, pp. 2469–2479, 2007. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
21. E. Crispo, “Modifying effects of phenotypic plasticity on interactions among natural selection, adaptation and gene flow,” Journal of Evolutionary Biology, vol. 21, no. 6, pp. 1460–1469, 2008. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
22. C. K. Ghalambor, J. K. McKay, S. P. Carroll, and D. N. Reznick, “Adaptive versus non-adaptive phenotypic plasticity and the potential for contemporary adaptation in new environments,” Functional Ecology, vol. 21, no. 3, pp. 394–407, 2007. View at Publisher · View at Google Scholar · View at Scopus
23. S. F. Gilbert and D. Epel, Ecological Developmental Biology: Integrating Epigenetics, Medicine, and Evolution, Sinauer Associates, 2009.
24. G. Fusco and A. Minelli, “Phenotypic plasticity in development and evolution: facts and concepts,” Philosophical Transactions of the Royal Society B, vol. 365, no. 1540, pp. 547–556, 2010. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
25. T. Schwander and O. Leimar, “Genes as leaders and followers in evolution,” Trends in Ecology and Evolution, vol. 26, no. 3, pp. 143–151, 2011. View at Publisher · View at Google Scholar · View at PubMed
26. T. Uller and H. Helantera, “When are genes ‘leaders’ or ‘followers’ in evolution?” Trends in Ecology and Evolution, vol. 26, no. 9, pp. 435–436, 2011. View at Publisher · View at Google Scholar · View at PubMed
27. D. W. Pfennig, M. A. Wund, E. C. Snell-Rood, T. Cruickshank, C. D. Schlichting, and A. P. Moczek, “Phenotypic plasticity's impacts on diversification and speciation,” Trends in Ecology and Evolution, vol. 25, no. 8, pp. 459–467, 2010. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
28. H. D. Rundle and P. Nosil, “Ecological speciation,” Ecology Letters, vol. 8, no. 3, pp. 336–352, 2005. View at Publisher · View at Google Scholar · View at Scopus
29. M. Turelli, N. H. Barton, and J. A. Coyne, “Theory and speciation,” Trends in Ecology and Evolution, vol. 16, no. 7, pp. 330–343, 2001. View at Publisher · View at Google Scholar · View at Scopus
30. J. A. Coyne and H. A. Orr, Speciation, Sinauer Associates, Sunderland, Mass, USA, 2004.
31. S. Gavrilets, Fitness Landscapes and the Origin of Species, Princeton University Press, Princeton, NJ, USA, 2004.
32. T. D. Price, A. Qvarnstrom, and D. E. Irwin, “The role of phenotypic plasticity in driving genetic evolution,” Proceedings of the Royal Society B, vol. 270, no. 1523, pp. 1433–1440, 2003. View at Publisher · View at Google Scholar · View at PubMed
33. R. Lande, “Adaptation to an extraordinary environment by evolution of phenotypic plasticity and genetic assimilation,” Journal of Evolutionary Biology, vol. 22, no. 7, pp. 1435–1446, 2009. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
34. D. A. Levin, “Flowering-time plasticity facilitates niche shifts in adjacent populations,” New Phytologist, vol. 183, no. 3, pp. 661–666, 2009. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
35. R. Svanbäck, M. Pineda-Krch, and M. Doebeli, “Fluctuating population dynamics promotes the evolution of phenotypic plasticity,” American Naturalist, vol. 174, no. 2, pp. 176–189, 2009. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
36. X. Thibert-Plante and A. P. Hendry, “The consequences of phenotypic plasticity for ecological speciation,” Journal of Evolutionary Biology, vol. 24, no. 2, pp. 326–342, 2011. View at Publisher · View at Google Scholar · View at PubMed
37. M. D. Herron and M. Doebeli, “Adaptive diversification of a plastic trait in a predictably fluctuating environment,” Journal of Theoretical Biology, vol. 285, pp. 58–68, 2011.
38. D. J. Funk, “Of ‘host forms’ and host races: terminological issues in ecological speciation,” International Journal of Ecology, vol. 2012, Article ID 506957, 8 pages, 2012. View at Publisher · View at Google Scholar
39. J. K. Conner and D. L. Hartl, A Primer of Ecological Genetics, Sinauer Associates, Sunderland, Mass, USA, 2004.
40. D. J. Futuyma, Evolution, Sinauer Associates, Sunderland, Mass, USA, 2nd edition, 2009.
41. D. O. Conover and E. T. Schultz, “Phenotypic similarity and the evolutionary significance of countergradient variation,” Trends in Ecology and Evolution, vol. 10, no. 6, pp. 248–252, 1995. View at Publisher · View at Google Scholar · View at Scopus
42. J. A. Fordyce, “The evolutionary consequences of ecological interactions mediated through phenotypic plasticity,” Journal of Experimental Biology, vol. 209, no. 12, pp. 2377–2383, 2006. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
43. G. R. Price, “Selection and covariance,” Nature, vol. 227, no. 5257, pp. 520–521, 1970. View at Publisher · View at Google Scholar · View at Scopus
44. J. A. Endler, Natural Selection in the Wild, Princeton University Press, Princeton, NJ, USA, 1986.
45. S. Via, “The evolution phenotypic plasticity: what do we really know?” in Ecological Genetics, L. A. Real, Ed., pp. 35–57, Princeton University Press, 1994.
46. G. L. Bush, “Reply [to M. Claridge] from G. L. Bush,” Trends in Ecology & Evolution, vol. 10, no. 1, p. 38, 1995. View at Scopus
47. M. Claridge, “Species and speciation,” Trends in Ecology & Evolution, vol. 10, no. 1, p. 38, 1995. View at Scopus
48. G. G. Simpson, Tempo and Mode in Evolution, Columbia University Press, New York, NY, USA, 1944.
49. S. J. Gould, The Structure of Evolutionary Theory, Harvard University Press, Cambridge, Mass, USA, 2002.
50. T. F. Stuessy, G. Jakubowsky, R. S. Gomez et al., “Anagenetic evolution in island plants,” Journal of Biogeography, vol. 33, no. 7, pp. 1259–1265, 2006. View at Publisher · View at Google Scholar · View at Scopus
51. A. P. Hendry, “Ecological speciation! or the lack thereof?” Canadian Journal of Fisheries and Aquatic Sciences, vol. 66, no. 8, pp. 1383–1398, 2009. View at Publisher · View at Google Scholar · View at Scopus
52. D. Schluter, “Evidence for ecological speciation and its alternative,” Science, vol. 323, no. 5915, pp. 737–741, 2009. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
53. E. Mayr, Systematics and the Origin of Species from the Viewpoint of a Zoologist, Columbia University Press, New York, NY, USA, 1942.
54. R. Matsuda, “The evolutionary process in talitrid amphipods and salamanders in changing environments, with a discussion of “genetic assimilation” and some other evolutionary concepts,” Canadian Journal of Zoology, vol. 60, no. 5, pp. 733–749, 1982. View at Scopus
55. H. B. Shaffer and S. R. Voss, “Phylogenetic and mechanistic analysis of a developmentally integrated character complex: alternate life history modes in ambystomatid salamanders,” American Zoologist, vol. 36, no. 1, pp. 24–35, 1996. View at Scopus
56. S. R. Voss and H. B. Shaffer, “Adaptive evolution via a major gene effect: paedomorphosis in the Mexican axolotl,” Proceedings of the National Academy of Sciences of the United States of America, vol. 94, no. 25, pp. 14185–14189, 1997. View at Publisher · View at Google Scholar · View at Scopus
57. H. B. Shaffer, “Evolution in a paedomorphic lineage. I. An electrophoretic analysis of the Mexican ambystomatid salamanders,” Evolution, vol. 38, pp. 1194–1206, 1984. View at Scopus
58. H. B. Shaffer and M. L. Mcknight, “The polytypic species revisited: genetic differentiation and molecular phylogenetics of the tiger salamander Ambystoma tigrinum (Amphibia: Caudata) complex,” Evolution, vol. 50, no. 1, pp. 417–433, 1996. View at Scopus
59. S. Gavrilets and A. Vose, “Case studies and mathematical models of ecological speciation. 2. Palms on an oceanic island,” Molecular Ecology, vol. 16, no. 14, pp. 2910–2921, 2007. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
60. V. Savolainen, M. C. Anstett, C. Lexer et al., “Sympatric speciation in palms on an oceanic island,” Nature, vol. 441, no. 7090, pp. 210–213, 2006. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
61. G. H. Hardy, “Mendelian proportions in a mixed population,” Science, vol. 28, no. 706, pp. 49–50, 1908. View at Scopus
62. D. Schluter, “Ecology and the origin of species,” Trends in Ecology and Evolution, vol. 16, no. 7, pp. 372–380, 2001. View at Publisher · View at Google Scholar · View at Scopus
63. K. Räsänen and A. P. Hendry, “Disentangling interactions between adaptive divergence and gene flow when ecology drives diversification,” Ecology Letters, vol. 11, no. 6, pp. 624–636, 2008. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
64. T. J. DeWitt and S. M. Scheiner, “Phenotypic variation from single genotypes: a primer,” in Phenotypic Plasticity: Functional and Conceptual Approaches, T. J. DeWitt and S. M. Scheiner, Eds., pp. 1–9, Oxford University Press, New York, NY, USA, 2004.
65. S. Via and R. Lande, “Genotype-environment interaction and the evolution of phenotypic plasticity,” Evolution, vol. 39, no. 3, pp. 505–522, 1985. View at Scopus
66. L. Zhivotovsky, M. Feldman, and A. Bergman, “On the evolution of phenotypic plasticity in a spatially heterogeneous environment,” Evolution, vol. 50, no. 2, pp. 547–558, 1996. View at Scopus
67. S. Sultan and H. G. Spencer, “Metapopulation structure favors plasticity over local adaptation,” American Naturalist, vol. 160, no. 2, pp. 271–283, 2002. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
68. J. Hollander, “Testing the grain-size model for the evolution of phenotypic plasticity,” Evolution, vol. 62, no. 6, pp. 1381–1389, 2008. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
69. J. B. S. Haldane, “A mathematical theory of natural and artificial selection—part VI. Isolation,” Proceedings of the Cambridge Philosophical Society, vol. 26, pp. 220–230, 1930.
70. M. G. Bulmer, “Multiple niche polymorphism,” American Naturalist, vol. 106, pp. 254–257, 1972.
71. M. Slatkin, “Gene flow and the geographic structure of natural populations,” Science, vol. 236, no. 4803, pp. 787–792, 1987. View at Scopus
72. W. R. Rice and E. E. Hostert, “Laboratory experiments on speciation: what have we learned in 40 years?” Evolution, vol. 47, no. 6, pp. 1637–1653, 1993. View at Scopus
73. S. Gavrilets, “Models of speciation: what have we learned in 40 years?” Evolution, vol. 57, no. 10, pp. 2197–2215, 2003. View at Scopus
74. R. D. Holt, “On the evolutionary ecology of species' ranges,” Evolutionary Ecology Research, vol. 5, no. 2, pp. 159–178, 2003. View at Scopus
75. D. Garant, S. E. Forde, and A. P. Hendry, “The multifarious effects of dispersal and gene flow on contemporary adaptation,” Functional Ecology, vol. 21, no. 3, pp. 434–443, 2007. View at Publisher · View at Google Scholar · View at Scopus
76. T. J. Kawecki, “Adaptation to marginal habitats,” Annual Review of Ecology, Evolution, and Systematics, vol. 39, pp. 321–342, 2008. View at Publisher · View at Google Scholar · View at Scopus
77. S. Via, “Genetic constraints on the evolution of phenotypic plasticity,” in Genetic Constraints on Adaptive Evolution, V. Loeschcke, Ed., pp. 47–71, Springer, Boston, Mass, USA, 1987.
78. S. Via, R. Gomulkiewicz, G. de Jong, S. M. Scheiner, C. D. Schlichting, and P. H. Van Tienderen, “Adaptive phenotypic plasticity: consensus and controversy,” Trends in Ecology and Evolution, vol. 10, no. 5, pp. 212–217, 1995. View at Publisher · View at Google Scholar · View at Scopus
79. A. Romero and S. M. Green, “The end of regressive evolution: examining and interpreting the evidence from cave fishes,” Journal of Fish Biology, vol. 67, no. 1, pp. 3–32, 2005. View at Publisher · View at Google Scholar · View at Scopus
80. M. Pigliucci, C. J. Murren, and C. D. Schlichting, “Phenotypic plasticity and evolution by genetic assimilation,” Journal of Experimental Biology, vol. 209, no. 12, pp. 2362–2367, 2006. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
81. R. B. Langerhans and T. J. DeWitt, “Plasticity constrained: over-generalized induction cues cause maladaptive phenotypes,” Evolutionary Ecology Research, vol. 4, no. 6, pp. 857–870, 2002. View at Scopus
82. F. C. James, “Environmental component of morphological differentiation in birds,” Science, vol. 221, no. 4606, pp. 184–186, 1983. View at Scopus
83. T. Steinger, B. A. Roy, and M. L. Stanton, “Evolution in stressful environments II: adaptive value and costs of plasticity in response to low light in Sinapis arvensis,” Journal of Evolutionary Biology, vol. 16, no. 2, pp. 313–323, 2003. View at Publisher · View at Google Scholar · View at Scopus
84. P. H. Van Tienderen, “Evolution of generalists and specialists in spatially heterogeneous environments,” Evolution, vol. 45, no. 6, pp. 1317–1331, 1991. View at Scopus
85. T. J. DeWitt, A. Sih, and D. S. Wilson, “Costs and limits of phenotypic plasticity,” Trends in Ecology and Evolution, vol. 13, no. 2, pp. 77–81, 1998. View at Publisher · View at Google Scholar · View at Scopus
86. T. B. Smith and S. Skulason, “Evolutionary significance of resource polymorphisms in fishes, amphibians, and birds,” Annual Review of Ecology and Systematics, vol. 27, pp. 111–133, 1996. View at Publisher · View at Google Scholar · View at Scopus
87. T. Lenormand, “Gene flow and the limits to natural selection,” Trends in Ecology and Evolution, vol. 17, no. 4, pp. 183–189, 2002. View at Publisher · View at Google Scholar · View at Scopus
88. C. D. Schlichting and M. Pigliucci, Phenotypic Evolution: A Reaction Norm Perspective, Sinauer Associates, 1998.
89. T. H. Bullock, “Compensation for temperature in the metabolism and activity of poikilotherms,” Biological Reviews, vol. 30, pp. 311–342, 1955.
90. R. Levins, “Thermal acclimation and heat resistance in Drosophila species,” American Naturalist, vol. 103, pp. 483–499, 1969.
91. K. A. Berven, D. E. Gill, and S. J. Smithgill, “Countergradient selection in the green frog, rana clamitans,” Evolution, vol. 33, pp. 609–623, 1979.
92. M. Kirkpatrick and N. H. Barton, “Evolution of a species' range,” American Naturalist, vol. 150, no. 1, pp. 1–23, 1997. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
93. B. M. Fitzpatrick, J. A. Fordyce, and S. Gavrilets, “What, if anything, is sympatric speciation?” Journal of Evolutionary Biology, vol. 21, no. 6, pp. 1452–1459, 2008. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
94. B. M. Fitzpatrick, J. A. Fordyce, and S. Gavrilets, “Pattern, process and geographic modes of speciation,” Journal of Evolutionary Biology, vol. 22, no. 11, pp. 2342–2347, 2009. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
95. J. Antonovics, “Evolution in closely adjacent plant populations. X. Long-term persistence of prereproductive isolation at a mine boundary,” Heredity, vol. 97, no. 1, pp. 33–37, 2006. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
96. M. C. Hall and J. H. Willis, “Divergent selection on flowering time contributes to local adaptation in Mimulus guttatus populations,” Evolution, vol. 60, no. 12, pp. 2466–2477, 2006. View at Publisher · View at Google Scholar · View at Scopus
97. J. B. Beltman and P. Haccou, “Speciation through the learning of habitat features,” Theoretical Population Biology, vol. 67, no. 3, pp. 189–202, 2005. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
98. J. Beltman and J. A. Metz, “Speciation: more likely through a genetic or through a learned habitat preference?” Proceedings of the Royal Society B, vol. 272, no. 1571, pp. 1455–1463, 2005. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
99. J. M. Davis and J. A. Stamps, “The effect of natal experience on habitat preferences,” Trends in Ecology and Evolution, vol. 19, no. 8, pp. 411–416, 2004. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
100. A. P. Hendry, V. Castric, M. T. Kinnison, and T. P. Quinn, “The evolution of philopatry and dispersal: homing versus straying in salmonids,” in Evolution illuminated: Salmon and their relatives, A. P. Hendry and S. C. Stearns, Eds., pp. 52–91, Oxford University Press, Oxford, UK, 2004.
101. N. Vallin and A. Qvarnstrom, “Learning the hard way: imprinting can enhance enforced shifts in habitat choice,” International Journal of Ecology, vol. 2011, Article ID 287532, 7 pages, 2011. View at Publisher · View at Google Scholar
102. E. A. Bernays and R. F. Chapman, Host-Plant Selection by Phytophagous Insects, Chapman and Hall, New York, NY, USA, 1994.
103. M. D. Sorenson, K. M. Sefc, and R. B. Payne, “Speciation by host switch in brood parasitic indigobirds,” Nature, vol. 424, no. 6951, pp. 928–931, 2003. View at Publisher · View at Google Scholar · View at PubMed
104. C. N. Balakrishnan, K. M. Sefc, and M. D. Sorenson, “Incomplete reproductive isolation following host shift in brood parasitic indigobirds,” Proceedings of the Royal Society B, vol. 276, no. 1655, pp. 219–228, 2009. View at Publisher · View at Google Scholar · View at PubMed
105. S. H. Berlocher and J. L. Feder, “Sympatric speciation in phytophagous insects: moving beyond controversy?” Annual Review of Entomology, vol. 47, pp. 773–815, 2002. View at Publisher · View at Google Scholar · View at PubMed
106. H. Knüttel and K. Fiedler, “Host-plant-derived variation in ultraviolet wing patterns influences mate selection by male butterflies,” Journal of Experimental Biology, vol. 204, no. 14, pp. 2447–2459, 2001.
107. M. D. Stennett and W. J. Etges, “Premating isolation is determined by larval rearing substrates in cactophilic Drosophila mojavensis. III. Epicuticular hydrocarbon variation is determined by use of different host plants in Drosophila mojavensis and Drosophila arizonae,” Journal of Chemical Ecology, vol. 23, no. 12, pp. 2803–2824, 1997.
108. W. J. Etges, C. L. Veenstra, and L. L. Jackson, “Premating isolation is determined by larval rearing substrates in cactophilic Drosophila mojavensis. VII. Effects of larval dietary fatty acids on adult epicuticular hydrocarbons,” Journal of Chemical Ecology, vol. 32, pp. 2629–2646, 2006.
109. G. Sharon, D. Segal, J. M. Ringo, A. Hefetz, I. Zilber-Rosenberg, and E. Rosenberg, “Commensal bacteria play a role in mating preference of Drosophila melanogaster,” Proceedings of the National Academy of Sciences of the United States of America, vol. 107, no. 46, pp. 20051–20056, 2010. View at Publisher · View at Google Scholar · View at PubMed
110. J. K. Craig and C. J. Foote, “Countergradient variation and secondary sexual color: phenotypic convergence promotes genetic divergence in carotenoid use between sympatric anadromous and nonanadromous morphs of sockeye salmon (Onchorhynchus nerka),” Evolution, vol. 55, pp. 380–391, 2001.
111. C. J. Foote, G. S. Brown, and C. W. Hawryshyn, “Female colour and male choice in sockeye salmon: implications for the phenotypic convergence of anadromous and nonanadromous morphs,” Animal Behaviour, vol. 67, no. 1, pp. 69–83, 2004. View at Publisher · View at Google Scholar
112. J. K. Craig, C. J. Foote, and C. C. Wood, “Countergradient variation in carotenoid use between sympatric morphs of sockeye salmon (Oncorhynchus nerka) exposes nonanadromous hybrids in the wild by their mismatched spawning colour,” Biological Journal of the Linnean Society, vol. 84, no. 2, pp. 287–305, 2005. View at Publisher · View at Google Scholar
113. D. L. Hartl and A. G. Clark, Principles of Population Genetics, Sinauer Associates, Sunderland, Mass, USA, 3rd edition, 1997.
114. M. Kirkpatrick and V. Ravigné, “Speciation by natural and sexual selection: models and experiments,” American Naturalist, vol. 159, pp. S22–S35, 2002.
115. D. I. Bolnick and B. M. Fitzpatrick, “Sympatric speciation: models and empirical evidence,” Annual Review of Ecology, Evolution, and Systematics, vol. 38, pp. 459–487, 2007. View at Publisher · View at Google Scholar · View at Scopus
116. G. de Jong, “Evolution of phenotypic plasticity: patterns of plasticity and the emergence of ecotypes,” New Phytologist, vol. 166, no. 1, pp. 101–117, 2005. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
117. D. W. Pfennig and M. McGee, “Resource polyphenism increases species richness: a test of the hypothesis,” Philosophical Transactions of the Royal Society B, vol. 365, no. 1540, pp. 577–591, 2010. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus