Mating systems and multiple paternity in the estuarine crocodile (Crocodylus porosus)

Lewis, Justine L., Fitzsimmons, Nancy N., Jamerlan, Mona Lisa, Buchan, Jason C. and Grigg, Gordon C. (2013) Mating systems and multiple paternity in the estuarine crocodile (Crocodylus porosus). Journal of Herpetology, 47 1: 24-33. doi:10.1670/10-303


Author Lewis, Justine L.
Fitzsimmons, Nancy N.
Jamerlan, Mona Lisa
Buchan, Jason C.
Grigg, Gordon C.
Title Mating systems and multiple paternity in the estuarine crocodile (Crocodylus porosus)
Formatted title
Mating systems and multiple paternity in the estuarine crocodile (Crocodylus porosus)
Journal name Journal of Herpetology   Check publisher's open access policy
ISSN 0022-1511
1937-2418
Publication date 2013
Sub-type Article (original research)
DOI 10.1670/10-303
Volume 47
Issue 1
Start page 24
End page 33
Total pages 10
Place of publication Salt Lake City, UT, United States
Publisher Society for the Study of Amphibians and Reptiles
Collection year 2014
Language eng
Formatted abstract
Microsatellite markers were used to investigate the mating system of the Estuarine Crocodile (Crocodylus porosus). Three-hundred and eighty-six hatchlings from 13 clutches from a wild Northern Territory population, and 364 hatchlings from 21 clutches from a captive North Queensland population, were sampled. All samples were genotyped across five microsatellite loci. Multiple paternity was found in 69% of clutches in the wild population compared to 38% of clutches in the captive population. Up to three possible fathers were indicated in some clutches. Shared paternity was suggested by the presence of a common paternal genotype within two clutches in the wild population and among up to three clutches from a large shared pen in the captive population. The probability of detecting multiple paternity at all loci was high; 95% in the wild population and 98% in the captive population. There was no evidence of increased hatching success in the clutches that indicated multiple paternity compared to single paternity clutches in either population (P = 0.43 to P = 0.67). It is unknown whether the occurrence of multiple paternity in C. porosus is a result of multiple mating within the same breeding season or of sperm stored from matings in a previous season. These results suggest the genetic mating system for C. porosus is not polygynous but more likely promiscuous, and there is no evidence of dominant alpha males who control paternity in large areas.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Biological Sciences Publications
 
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