Molecular evidence for multiple paternity in a population of the Viviparous Tule Perch Hysterocarpus traski

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 Hy...

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Bibliographic Details
Published in:The Journal of heredity 2013-03, Vol.104 (2), p.217-222
Main Authors: Liu, Jin-Xian, Tatarenkov, Andrey, O'Rear, Teejay A, Moyle, Peter B, Avise, John C
Format: Article
Language:English
Subjects:
Animal populations
Animal reproduction
Animals
Body Size
Female
Fertility
Fish
Genetic Markers
Genetics
Genetics, Population
Male
Microsatellite Repeats
Native species
Paternity
Perches - genetics
Pregnancy
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Summary: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.
ISSN:0022-1503
1465-7333
DOI:10.1093/jhered/ess105