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Data from: Sexual isolation promotes divergence between parapatric lake and stream stickleback

Data from: Sexual isolation promotes divergence between parapatric lake and stream stickleback
Data from: Sexual isolation promotes divergence between parapatric lake and stream stickleback
Speciation can be initiated by adaptive divergence between populations in ecologically different habitats, but how sexually based reproductive barriers contribute to this process is less well understood. We here test for sexual isolation between ecotypes of threespine stickleback fish residing in adjacent lake and stream habitats in the Lake Constance basin, Central Europe. Mating trials in outdoor mesocosms allowing for natural reproductive behavior reveal that mating occurs preferentially between partners of the same than of the opposed ecotype. Compared to random mating, this sexual barrier reduces gene flow between the ecotypes by some 36%. This relatively modest strength of sexual isolation is surprising because comparing the males between the two ecotypes shows striking differentiation in traits generally considered relevant to reproductive behavior (body size, breeding coloration, nest size). Analyzing size differences among the individuals in the mating trials further indicates that assortative mating is not related to ecotype differences in body size. Overall, we demonstrate that sexually based reproductive isolation promotes divergence in lake-stream stickleback along with other known reproductive barriers, but also caution against inferring strong sexual isolation from the observation of strong population divergence in sexually relevant traits.,Dryad.stickleback.mate.choiceComplete data set used for all analyses in the study. The rows are the replicate experimental trials (N = 58). The first column specifies the date of termination of the trials. The subsequent columns describe the experimental females, then the lake males, then the stream males (each trial involved a single female and a male of each ecotype). The last column indicates the male that mated with the female. Missing data are coded as 'NA'.,
Dryad Digital Repository
Berner, Daniel
971a535f-d960-4699-93a8-67e0648aa74d
Ammann, Matthias
218089b9-b313-4b1d-ac67-b21d411b0289
Spencer, Eleanor
297347f2-8960-450e-8d89-e638edb940fd
Rueegg, Attila
1c13aa53-24cb-476c-b2d6-48adb74bff43
Luescher, Daniel
bee5b1c4-36a7-417b-96d6-e6e43a0e3e57
Moser, Dario
f214f5a6-3147-466e-b2c1-598da9ae0d76
Berner, Daniel
971a535f-d960-4699-93a8-67e0648aa74d
Ammann, Matthias
218089b9-b313-4b1d-ac67-b21d411b0289
Spencer, Eleanor
297347f2-8960-450e-8d89-e638edb940fd
Rueegg, Attila
1c13aa53-24cb-476c-b2d6-48adb74bff43
Luescher, Daniel
bee5b1c4-36a7-417b-96d6-e6e43a0e3e57
Moser, Dario
f214f5a6-3147-466e-b2c1-598da9ae0d76

(2016) Data from: Sexual isolation promotes divergence between parapatric lake and stream stickleback. Dryad Digital Repository doi:10.5061/dryad.78p62 [Dataset]

Record type: Dataset

Abstract

Speciation can be initiated by adaptive divergence between populations in ecologically different habitats, but how sexually based reproductive barriers contribute to this process is less well understood. We here test for sexual isolation between ecotypes of threespine stickleback fish residing in adjacent lake and stream habitats in the Lake Constance basin, Central Europe. Mating trials in outdoor mesocosms allowing for natural reproductive behavior reveal that mating occurs preferentially between partners of the same than of the opposed ecotype. Compared to random mating, this sexual barrier reduces gene flow between the ecotypes by some 36%. This relatively modest strength of sexual isolation is surprising because comparing the males between the two ecotypes shows striking differentiation in traits generally considered relevant to reproductive behavior (body size, breeding coloration, nest size). Analyzing size differences among the individuals in the mating trials further indicates that assortative mating is not related to ecotype differences in body size. Overall, we demonstrate that sexually based reproductive isolation promotes divergence in lake-stream stickleback along with other known reproductive barriers, but also caution against inferring strong sexual isolation from the observation of strong population divergence in sexually relevant traits.,Dryad.stickleback.mate.choiceComplete data set used for all analyses in the study. The rows are the replicate experimental trials (N = 58). The first column specifies the date of termination of the trials. The subsequent columns describe the experimental females, then the lake males, then the stream males (each trial involved a single female and a male of each ecotype). The last column indicates the male that mated with the female. Missing data are coded as 'NA'.,

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More information

Published date: 1 January 2016

Identifiers

Local EPrints ID: 448486
URI: http://eprints.soton.ac.uk/id/eprint/448486
PURE UUID: 92f2ab8d-0cab-4c11-b83e-15a0c38986bf

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Date deposited: 23 Apr 2021 16:30
Last modified: 27 Jan 2022 18:05

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Contributors

Contributor: Daniel Berner
Contributor: Matthias Ammann
Contributor: Eleanor Spencer
Contributor: Attila Rueegg
Contributor: Daniel Luescher
Contributor: Dario Moser

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