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A test for within ‐ lake niche differentiation in the nine ‐ spined sticklebacks ( Pungitius pungitius )

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ABSTRACT

Specialization for the use of different resources can lead to ecological speciation. Accordingly, there are numerous examples of ecologically specialized pairs of fish “species” in postglacial lakes. Using a polymorphic panel of single nucleotide variants, we tested for genetic footprints of within‐lake population stratification in nine‐spined sticklebacks (Pungitius pungitius) collected from three habitats (viz. littoral, benthic, and pelagic) within a northern Swedish lake. Analyses of admixture, population structure, and relatedness all supported the conclusion that the fish from this lake form a single interbreeding unit.

No MeSH data available.


Results of admixture tests obtained with program STRUCTURE (Pritchard et al. 2000) assuming (A) two, (B) three, and (C) four putative clusters. All individuals in all three putative populations (1 = benthic, 2 = littoral, 3 = pelagic) are indicated to be equally admixed, and the admixture levels indicate an equal contribution of all three putative populations to each individual.
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ece32182-fig-0001: Results of admixture tests obtained with program STRUCTURE (Pritchard et al. 2000) assuming (A) two, (B) three, and (C) four putative clusters. All individuals in all three putative populations (1 = benthic, 2 = littoral, 3 = pelagic) are indicated to be equally admixed, and the admixture levels indicate an equal contribution of all three putative populations to each individual.

Mentions: Our analysis revealed a state of complete panmixia, with each individual in the analysis showing to be a perfectly proportional mixture of all the possible putative populations, irrespective of how many populations (2, 3, or 4) the program STRUCTURE was trying to identify in the data (Fig. 1).


A test for within ‐ lake niche differentiation in the nine ‐ spined sticklebacks ( Pungitius pungitius )
Results of admixture tests obtained with program STRUCTURE (Pritchard et al. 2000) assuming (A) two, (B) three, and (C) four putative clusters. All individuals in all three putative populations (1 = benthic, 2 = littoral, 3 = pelagic) are indicated to be equally admixed, and the admixture levels indicate an equal contribution of all three putative populations to each individual.
© Copyright Policy - creativeCommonsBy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4979704&req=5

ece32182-fig-0001: Results of admixture tests obtained with program STRUCTURE (Pritchard et al. 2000) assuming (A) two, (B) three, and (C) four putative clusters. All individuals in all three putative populations (1 = benthic, 2 = littoral, 3 = pelagic) are indicated to be equally admixed, and the admixture levels indicate an equal contribution of all three putative populations to each individual.
Mentions: Our analysis revealed a state of complete panmixia, with each individual in the analysis showing to be a perfectly proportional mixture of all the possible putative populations, irrespective of how many populations (2, 3, or 4) the program STRUCTURE was trying to identify in the data (Fig. 1).

View Article: PubMed Central - PubMed

ABSTRACT

Specialization for the use of different resources can lead to ecological speciation. Accordingly, there are numerous examples of ecologically specialized pairs of fish “species” in postglacial lakes. Using a polymorphic panel of single nucleotide variants, we tested for genetic footprints of within‐lake population stratification in nine‐spined sticklebacks (Pungitius pungitius) collected from three habitats (viz. littoral, benthic, and pelagic) within a northern Swedish lake. Analyses of admixture, population structure, and relatedness all supported the conclusion that the fish from this lake form a single interbreeding unit.

No MeSH data available.