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Type: Journal article
Title: Genetic parentage analysis confirms a polygynandrous breeding system in the European grayling (Thymallus thymallus)
Author: Haddeland, P.
Junge, C.
Serbezov, D.
Vollestad, L.
Citation: PLoS One, 2015; 10(3):e0122032-1-e0122032-12
Publisher: Public Library of Science
Issue Date: 2015
ISSN: 1932-6203
Editor: Wicker-Thomas, C.
Statement of
Peter Jørgen Haddeland, Claudia Junge, Dimitar Serbezov, Leif Asbjørn Vøllestad
Abstract: Knowing the breeding system of a species is important in order to understand individual variation in reproductive success. Large variation in reproductive success and thus reproductive skew strongly impacts on the effective number of breeders and thus the long-term effective population size (Ne). Fishes, in particular species belonging to the salmonid family, exhibit a wide diversity of breeding systems. In general, however, breeding systems are rarely studied in detail in the wild. Here we examine the breeding system of the spring-spawning European grayling Thymallus thymallus from a small Norwegian stream using parentage assignment based on the genotyping of 19 polymorphic microsatellite loci. In total 895 individual grayling fry and 154 mature grayling (57 females and 97 males) were genotyped. A total of 466 offspring were assigned a father, a mother, or a parent pair with a confidence of 90% or higher. Successfully reproducing males had on average 11.9 ± 13.3 (SD) offspring with on average 2.1 ± 1.2 partners, whereas successful females had on average 9.5 ± 12.8 offspring and 2.3 ± 1.5 partners. Parents with more partners also produced more offspring. Thus the grayling breeding system within this small stream revealed a polygynandrous breeding system, similar to what has been observed for many other salmonid fish species. The present study thus unambiguously corroborates a polygynadrous breeding system in the European grayling. This knowledge is critical for managing populations of this species, which has suffered significant local population declines throughout its range over the last several decades.
Keywords: Animals
Microsatellite Repeats
Genetic Variation
Genetic Loci
Rights: © 2015 Haddeland et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited
DOI: 10.1371/journal.pone.0122032
Appears in Collections:Aurora harvest 7
Ecology, Evolution and Landscape Science publications

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