10.5061/DRYAD.JP1F0N5
Moss, Jeanette B.
Mississippi State University
Gerber, Glenn P.
Zoological Society of San Diego
Schwirian, Aumbriel
Mississippi State University
Jackson, Anna C.
Mississippi State University
Welch, Mark E.
Mississippi State University
Data from: Evidence for dominant males but not choosy females in an
insular rock iguana
Dryad
dataset
2018
Mating Systems
multiple-paternity
island population
2018-09-05T15:50:30Z
2018-09-05T15:50:30Z
en
https://doi.org/10.1093/beheco/ary131
3170860 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
In natural populations susceptible to inbreeding depression, behaviors
such as female promiscuity and disassortative mating may enhance the
production of outbred progeny and help maintain genetic variation at the
population-level. However, empirical tests of such hypotheses have largely
focused on mating systems in which female choice is known to play a large
role. In insular reptile populations, cryptic choice may be important for
overcoming constraints on precopulatory choice and diversifying breeder
representation. We carried out pedigree reconstructions of 50 clutches of
critically endangered Cyclura nubila caymanensis (Sauria: Iguanidae) to
investigate the prevalence and efficacy of strategies theorized to
optimize genetic compatibility among mate pairs. We found that females
mating disassortatively and multiply, but not with respect to male
heterozygosity, tended to produce more heterozygous offspring on average.
Pair relatedness also had a negative effect on hatching success, while
additional sires positively influenced clutch size. Despite evidence for
direct and indirect benefits, females did not mate with more outbred or
genetically dissimilar males than expected by chance. Our data imply
strong reproductive skew among males, with geographic proximity and body
size largely predicting siring success. Multiple-paternity occurred in a
minimum of 38% of clutches. Paradoxically, females were not more
promiscuous when confronted with more males, as demonstrated at a site
supporting high local densities. Our data imply that while female mating
behaviors have the potential to confer adaptive benefits in this small
population, the trajectory of mating system evolution may be largely
constrained by sexual conflict.
Candidate Adult Microsatellite Genotypes and MorphometricsGenotypes (14
microsatellite loci) and morphological measurements (SVL, mass, and head
measurements) of candidate adult C. nubila caymanensis sampled on Little
Cayman. Sex and identities of clutches dammed/sired are
specified.Dryad-Adult Candidate Microsatellite Genotypes and
Morphometrics.xlsxOffspring Microsatellite Genotypes and
MorphometricsGenotypes (14 microsatellite loci) and morphological
measurements (SVL and mass) of hatchling C. nubila caymanensis sampled on
Little Cayman. Clutch identity is specified.Dryad-Offspring Microsatellite
Genotypes and Morphometrics.xlsxDyadic Relatedness of Adult
CandidatesRelatedness of pairs of individuals calculated using seven
estimators implemented in COANCESTRY. All pairwise comparisons are
considered.Dyadic Relatedness Adult Candidates.xlsxF and MLH Estimates
Adult CandidatesTwo estimators of inbreeding coefficient (F) and three
estimators of multi-locus heterozygosity (MLH) - standardized
heterozygosity (SH), internal relatedness (IR) and homozygosity by locus
(HL) - calculated from the genotypes of all adult candidates using
COANCESTRY and the R package, 'Rhh,' respectively.F and MLH
Estimaes of HatchlingsTwo estimators of inbreeding coefficient (F) and
three estimators of multi-locus heterozygosity (MLH) - standardized
heterozygosity (SH), internal relatedness (IR) and homozygosity by locus
(HL) - calculated from the genotypes of all hatchlings using COANCESTRY
and the R package, 'Rhh,' respectively.
Cayman Islands
Little Cayman
British West Indies