title: Dimensionality of mate choice, sexual isolation, and speciation.
abstract: Multiple cues, across multiple sensory modalities, are involved in mate choice in a wide range of animal taxa. This multiplicity leads to the prediction that, in adaptive radiations, sexual isolation results from divergence in multiple dimensions. However, difficulties in directly measuring preferences and detecting multiple effects limit our ability to empirically assess the number of independent traits contributing to mate choice and sexual isolation. We present an approach to estimate the dimensionality of sexual isolation using mating trials across groups of related populations. We analyze nine radiations: seven in fruit flies (Drosophila) and one each in salamanders (Desmognathus) and cichlid fishes (Pseudotropheus). We find strong evidence that multiple latent traits--linear combinations of phenotypic traits and preferences--are responsible for the patterns of sexual isolation in all nine radiations but that dimensionality has a strong upper limit. Just two latent traits are implicated in the majority of cases. Mapping along latent trait axes tests predictions of sexual-selection models and allows correlation with specific phenotypic traits and functional components of mate choice. We find support for the role of stabilizing natural selection on the sexually selected (male) traits. In the cichlids, latent-trait axes incorporate male-coloration patterns and exhibit convergence as well as divergence among populations. In the salamanders, temporal patterning in sensory modalities and male vs. female preferences are reflected in different latent-trait axes.
authors.affiliation: Department of Zoology, Oregon State University, Corvallis, OR 97331-2914, USA. hohenlop@science.oregonstate.edu
authors.forename: Paul A
authors.initials: PA
authors.lastname: Hohenlohe
authors.forename: Stevan J
authors.initials: SJ
authors.lastname: Arnold
mesh_terms: D000818:Animals; D005075:Biological Evolution; D023681:Cichlids / Q000235:genetics / Q000502:physiology; D004330:Drosophila / Q000235:genetics / Q000502:physiology; D005260:Female; D049810:Genetic Speciation; D008297:Male; D052586:Mating Preference, Animal / Q000502:physiology*; D008957:Models, Genetic; D010641:Phenotype; D014562:Caudata / Q000235:genetics / Q000502:physiology
references.citation: Proc Biol Sci. 2004 Apr 7;271(1540):675-80
references.pmid: 15209099
references.citation: Proc Natl Acad Sci U S A. 1944 Sep 15;30(9):238-44
references.pmid: 16588650
references.citation: Am Nat. 2004 Mar;163(3):329-40
references.pmid: 15026971
references.citation: Proc Natl Acad Sci U S A. 1996 Dec 10;93(25):14628-31
references.pmid: 8962104
references.citation: Evolution. 1991 Sep;45(6):1422-1430
references.pmid: 28563819
references.citation: Am Nat. 2006 Apr;167(4):E102-16
references.pmid: 16670989
references.citation: Am Nat. 2007 Sep;170(3):409-20
references.pmid: 17879191
references.citation: Evolution. 1989 Mar;43(2):362-381
references.pmid: 28568554
references.citation: PLoS Biol. 2005 Nov;3(11):e368
references.pmid: 16231971
references.citation: Proc Natl Acad Sci U S A. 1944 Nov 15;30(11):335-9
references.pmid: 16588660
references.citation: Trends Ecol Evol. 2004 May;19(5):264-71
references.pmid: 16701266
references.citation: Evolution. 2005 Apr;59(4):871-80
references.pmid: 15926696
references.citation: Am Nat. 2003 Feb;161(2):240-53
references.pmid: 12675370
references.citation: Nature. 2002 May 23;417(6887):440-3
references.pmid: 12024213
references.citation: Evolution. 1989 Jul;43(4):745-755
references.pmid: 28564204
references.citation: Trends Ecol Evol. 2001 Jul 1;16(7):364-371
references.pmid: 11403869
references.citation: Genetics. 2006 Jun;173(2):1135-44
references.pmid: 16547106
references.citation: Evolution. 1994 Jun;48(3):853-867
references.pmid: 28568273
references.citation: Biol Rev Camb Philos Soc. 2003 Nov;78(4):575-95
references.pmid: 14700392
references.citation: Evolution. 2009 Mar;63(3):583-94
references.pmid: 19087180
references.citation: Nature. 2004 May 20;429(6989):294-8
references.pmid: 15152252
references.citation: Evolution. 2008 Jun;62(6):1437-49
references.pmid: 18346219
references.citation: Genetica. 2009 Jun;136(2):271-84
references.pmid: 18695991
references.citation: J Hered. 2001 Mar-Apr;92(2):198-205
references.pmid: 11396579
references.citation: Am Nat. 2001 Mar;157(3):245-61
references.pmid: 18707288
references.citation: Biol Lett. 2005 Dec 22;1(4):411-4
references.pmid: 17148220
references.citation: Proc Natl Acad Sci U S A. 2003 Nov 25;100(24):14074-9
references.pmid: 14614144
references.citation: Nat Rev Genet. 2006 Sep;7(9):681-92
references.pmid: 16921346
references.citation: Evolution. 2001 Apr;55(4):721-7
references.pmid: 11392390
references.citation: Evolution. 2009 Oct;63(10):2504-12
references.pmid: 19500145
references.citation: Proc Natl Acad Sci U S A. 1997 Nov 11;94(23):12442-5
references.pmid: 9356468
references.citation: Proc Natl Acad Sci U S A. 1981 Jun;78(6):3721-5
references.pmid: 16593036
references.citation: Evolution. 2005 May;59(5):1027-38
references.pmid: 16136802
references.citation: BMC Evol Biol. 2009 Mar 05;9:53
references.pmid: 19265521
references.citation: Nature. 2000 Jul 13;406(6792):186-8
references.pmid: 10910358
references.citation: Am Nat. 2008 Aug;172(2):194-202
references.pmid: 18597623
references.citation: J Theor Biol. 1985 Dec 21;117(4):651-64
references.pmid: 4094458
references.citation: Proc Natl Acad Sci U S A. 2005 Apr 26;102(17):6045-50
references.pmid: 15840726
references.citation: Science. 2000 Jan 14;287(5451):306-8
references.pmid: 10634785
references.citation: Evolution. 2009 Aug;63(8):2031-46
references.pmid: 19473397
references.citation: Evolution. 2003 Jul;57(7):1622-30
references.pmid: 12940366
references.citation: J Evol Biol. 2008 Sep;21(5):1201-19
references.pmid: 18662244
references.citation: Evolution. 2000 Aug;54(4):1303-12
references.pmid: 11005297
references.citation: Evolution. 2004 Dec;58(12):2754-62
references.pmid: 15696753
references.citation: Biol Rev Camb Philos Soc. 1997 May;72(2):283-327
references.pmid: 9155244
references.citation: Evolution. 1996 Jun;50(3):1024-1033
references.pmid: 28565275
references.citation: Proc Natl Acad Sci U S A. 1944 Nov 15;30(11):340-5
references.pmid: 16588661
references.citation: Nature. 2001 Apr 5;410(6829):684-6
references.pmid: 11287953