Sex ratios and bimaturism differ between temperature-dependent and genetic sex-determination systems in reptiles.
Age of sexual maturity
Environmental sex determination
Non-avian sauropsids
Sex chromosomes
Sex ratio
Survival
Journal
BMC evolutionary biology
ISSN: 1471-2148
Titre abrégé: BMC Evol Biol
Pays: England
ID NLM: 100966975
Informations de publication
Date de publication:
18 02 2019
18 02 2019
Historique:
received:
17
12
2018
accepted:
12
02
2019
entrez:
20
2
2019
pubmed:
20
2
2019
medline:
27
6
2019
Statut:
epublish
Résumé
Sex-determining systems may profoundly influence the ecology, behaviour and demography of animals, yet these relationships are poorly understood. Here we investigate whether species with temperature-dependent (TSD) and genetic sex determination (GSD) differ in key demographic traits, using data from 181 species representing all major phylogenetic lineages of extant reptiles. We show that species with TSD exhibit significantly higher within-species variance in sex ratios than GSD species in three major life stages: birth or hatching, juvenility and adulthood. In contrast, sex differences in adult mortality rates do not differ between GSD and TSD species. However, TSD species exhibit significantly greater sex differences in maturation ages than GSD species. These results support the recent theoretical model that evolution of TSD is facilitated by sex-specific fitness benefits of developmental temperatures due to bimaturism. Our findings suggest that different sex-determination systems are associated with different demographic characteristics that may influence population viability and social evolution.
Sections du résumé
BACKGROUND
Sex-determining systems may profoundly influence the ecology, behaviour and demography of animals, yet these relationships are poorly understood. Here we investigate whether species with temperature-dependent (TSD) and genetic sex determination (GSD) differ in key demographic traits, using data from 181 species representing all major phylogenetic lineages of extant reptiles.
RESULTS
We show that species with TSD exhibit significantly higher within-species variance in sex ratios than GSD species in three major life stages: birth or hatching, juvenility and adulthood. In contrast, sex differences in adult mortality rates do not differ between GSD and TSD species. However, TSD species exhibit significantly greater sex differences in maturation ages than GSD species.
CONCLUSION
These results support the recent theoretical model that evolution of TSD is facilitated by sex-specific fitness benefits of developmental temperatures due to bimaturism. Our findings suggest that different sex-determination systems are associated with different demographic characteristics that may influence population viability and social evolution.
Identifiants
pubmed: 30777013
doi: 10.1186/s12862-019-1386-3
pii: 10.1186/s12862-019-1386-3
pmc: PMC6378719
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
57Subventions
Organisme : Biotechnology and Biological Sciences Research Council
Pays : United Kingdom
Références
J Evol Biol. 2006 Nov;19(6):1775-84
pubmed: 17040374
Nature. 2015 Jul 2;523(7558):79-82
pubmed: 26135451
Curr Biol. 2018 Jan 8;28(1):154-159.e4
pubmed: 29316410
Proc Natl Acad Sci U S A. 2015 Nov 3;112(44):13603-8
pubmed: 26483476
Nat Rev Genet. 2006 Aug;7(8):645-53
pubmed: 16847464
Q Rev Biol. 1991 Jun;66(2):149-79
pubmed: 1891591
Nature. 2009 Sep 17;461(7262):389-92
pubmed: 19759619
Ecol Evol. 2016 Jun 28;6(15):5207-20
pubmed: 27551377
Proc Biol Sci. 2014 Aug 7;281(1788):20140342
pubmed: 24966308
Genome Biol. 2008;9(2):R30
pubmed: 18269752
Bioessays. 2013 Aug;35(8):717-24
pubmed: 23733656
Sci Data. 2014 Jun 24;1:140015
pubmed: 25977773
Nat Commun. 2013;4:1587
pubmed: 23481395
Evolution. 2011 Jan;65(1):64-78
pubmed: 20722730
Evolution. 1992 Dec;46(6):1722-1730
pubmed: 28567769
Evolution. 2014 Aug;68(8):2343-56
pubmed: 24816221
Proc Natl Acad Sci U S A. 2003 Feb 4;100(3):1089-94
pubmed: 12540829
Am Nat. 2014 Apr;183(4):519-36
pubmed: 24642496
Nature. 1977 Apr 28;266(5605):828-30
pubmed: 865602
Curr Biol. 2014 Apr 14;24(8):880-4
pubmed: 24656831
Conserv Biol. 2010 Oct;24(5):1268-77
pubmed: 20337675
Proc Biol Sci. 2008 Nov 7;275(1650):2441-8
pubmed: 18647722
Evolution. 2016 Feb;70(2):329-41
pubmed: 26767911
Evolution. 2011 Jun;65(6):1808-13
pubmed: 21644965
PLoS One. 2014 Apr 08;9(4):e94214
pubmed: 24714691
Philos Trans R Soc Lond B Biol Sci. 2017 Sep 19;372(1729):
pubmed: 28760766
J Hered. 2016 Jan;107(1):61-70
pubmed: 26245920
Nature. 2015 Nov 5;527(7576):91-4
pubmed: 26444239
Chromosome Res. 2012 Jan;20(1):47-55
pubmed: 22143254
Annu Rev Genomics Hum Genet. 2011;12:391-406
pubmed: 21801024
Evolution. 2013 Mar;67(3):635-45
pubmed: 23461315
Ecology. 2010 Oct;91(10):3016-26
pubmed: 21058561
Nature. 2010 Nov 18;468(7322):436-8
pubmed: 20981009
Sex Dev. 2010;4(1-2):129-40
pubmed: 20145383
PLoS Biol. 2014 Jul 01;12(7):e1001899
pubmed: 24983465