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Molecular Evidence for Multiple Paternity in a Population of the Viviparous Tule Perch Hysterocarpus traski

Authors
  • Jin-Xian, Liu
  • Andrey, Tatarenkov
  • Teejay A., Orear
  • Peter Moyle
  • John C., Avise
Type
Published Article
Journal
Journal of Heredity
Publisher
Oxford University Press
Publication Date
Dec 01, 2012
Volume
104
Pages
217–217
Identifiers
DOI: 10.1093/jhered/ess105
Source
Center for Watershed Sciences John Muir Institute of the Environment
License
Unknown

Abstract

Population density might be an important variable in determining the degree of multiple paternity. In a previous study, a high level of multiple paternity was detected in the shiner perch Cymatogaster aggregata, a species with high population density and a high mate encounter rate. The tule perch Hysterocarpus traski is phylogenetically closely related to C. aggregata, but it has relatively lower population density, which may result in distinct patterns of multiple paternity in these 2 species. To test the hypothesis that mate encounter rate may affect the rate of successful mating, we used polymorphic microsatellite markers to identify multiple paternity in the progeny arrays of 12 pregnant females from a natural population of tule perch. Multiple paternity was detected in 11 (92\%) of the 12 broods. The number of sires per brood ranged from 1 to 4 (mean 2.5) but with no correlation between sire number and brood size. Although the brood size of tule perch is considerably larger than that of shiner perch (40.7 vs. 12.9, respectively), the average number of sires per brood in tule perch is much lower than that in shiner perch (2.5 vs. 4.6, respectively). These results are consistent with the hypothesis that mate encounter rate is an important factor affecting multiple mating.

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