Polyandry in dragon lizards: inbred paternal genotypes sire fewer offspring

Frere, Celine H., Chandrasoma, Dani and Whiting, Martin J. (2015) Polyandry in dragon lizards: inbred paternal genotypes sire fewer offspring. Ecology and Evolution, 5 8: 1686-1692. doi:10.1002/ece3.1447


Author Frere, Celine H.
Chandrasoma, Dani
Whiting, Martin J.
Title Polyandry in dragon lizards: inbred paternal genotypes sire fewer offspring
Journal name Ecology and Evolution   Check publisher's open access policy
ISSN 2045-7758
Publication date 2015-04
Year available 2015
Sub-type Article (original research)
DOI 10.1002/ece3.1447
Open Access Status DOI
Volume 5
Issue 8
Start page 1686
End page 1692
Total pages 7
Place of publication Chichester, West Sussex, United Kingdom
Publisher John Wiley & Sons
Language eng
Formatted abstract
Multiple mating in female animals is something of a paradox because it can either be risky (e.g., higher probability of disease transmission, social costs) or provide substantial fitness benefits (e.g., genetic bet hedging whereby the likelihood of reproductive failure is lowered). The genetic relatedness of parental units, particularly in lizards, has rarely been studied in the wild. Here, we examined levels of multiple paternity in Australia's largest agamid lizard, the eastern water dragon (Intellagama lesueurii), and determined whether male reproductive success is best explained by its heterozygosity coefficient or the extent to which it is related to the mother. Female polyandry was the norm: 2/22 clutches (9.2%) were sired by three or more fathers, 17/22 (77.2%) were sired by two fathers, and only 3/22 (13.6%) clutches were sired by one father. Moreover, we reconstructed the paternal genotypes for 18 known mother–offspring clutches and found no evidence that females were favoring less related males or that less related males had higher fitness. However, males with greater heterozygosity sired more offspring. While the postcopulatory mechanisms underlying this pattern are not understood, female water dragons likely represent another example of reproduction through cryptic means (sperm selection/sperm competition) in a lizard, and through which they may ameliorate the effects of male-driven precopulatory sexual selection.
Keyword Cryptic female choice
Genetic benefits
Genotype reconstruction
Gerud
Inbreeding
Polyandry
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Biological Sciences Publications
 
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