--- _id: '7995' abstract: - lang: eng text: When divergent populations are connected by gene flow, the establishment of complete reproductive isolation usually requires the joint action of multiple barrier effects. One example where multiple barrier effects are coupled consists of a single trait that is under divergent natural selection and also mediates assortative mating. Such multiple‐effect traits can strongly reduce gene flow. However, there are few cases where patterns of assortative mating have been described quantitatively and their impact on gene flow has been determined. Two ecotypes of the coastal marine snail, Littorina saxatilis , occur in North Atlantic rocky‐shore habitats dominated by either crab predation or wave action. There is evidence for divergent natural selection acting on size, and size‐assortative mating has previously been documented. Here, we analyze the mating pattern in L. saxatilis with respect to size in intensively sampled transects across boundaries between the habitats. We show that the mating pattern is mostly conserved between ecotypes and that it generates both assortment and directional sexual selection for small male size. Using simulations, we show that the mating pattern can contribute to reproductive isolation between ecotypes but the barrier to gene flow is likely strengthened more by sexual selection than by assortment. acknowledgement: We are very grateful to I. Sencic, L. Brettell, A.‐L. Liabot, J. Galindo, M. Ravinet, and A. Butlin for their help with field sampling and mating experiments. This work was funded by the Natural Environment Research Council, European Research Council and Swedish Research Council VR and we are also very grateful for the support of the Linnaeus Centre for Marine Evolutionary Biology at the University of Gothenburg. The simulations were performed on resources at Chalmers Centre for Computational Science and Engineering (C3SE) provided by the Swedish National Infrastructure for Computing (SNIC). AMW was funded by the European Union's Horizon 2020 research and innovation program under Marie Skłodowska‐Curie grant agreement no. 797747. article_processing_charge: No article_type: original author: - first_name: Samuel full_name: Perini, Samuel last_name: Perini - first_name: Marina full_name: Rafajlović, Marina last_name: Rafajlović - first_name: Anja M full_name: Westram, Anja M id: 3C147470-F248-11E8-B48F-1D18A9856A87 last_name: Westram orcid: 0000-0003-1050-4969 - first_name: Kerstin full_name: Johannesson, Kerstin last_name: Johannesson - first_name: Roger K. full_name: Butlin, Roger K. last_name: Butlin citation: ama: Perini S, Rafajlović M, Westram AM, Johannesson K, Butlin RK. Assortative mating, sexual selection, and their consequences for gene flow in Littorina. Evolution. 2020;74(7):1482-1497. doi:10.1111/evo.14027 apa: Perini, S., Rafajlović, M., Westram, A. M., Johannesson, K., & Butlin, R. K. (2020). Assortative mating, sexual selection, and their consequences for gene flow in Littorina. Evolution. Wiley. https://doi.org/10.1111/evo.14027 chicago: Perini, Samuel, Marina Rafajlović, Anja M Westram, Kerstin Johannesson, and Roger K. Butlin. “Assortative Mating, Sexual Selection, and Their Consequences for Gene Flow in Littorina.” Evolution. Wiley, 2020. https://doi.org/10.1111/evo.14027. ieee: S. Perini, M. Rafajlović, A. M. Westram, K. Johannesson, and R. K. Butlin, “Assortative mating, sexual selection, and their consequences for gene flow in Littorina,” Evolution, vol. 74, no. 7. Wiley, pp. 1482–1497, 2020. ista: Perini S, Rafajlović M, Westram AM, Johannesson K, Butlin RK. 2020. Assortative mating, sexual selection, and their consequences for gene flow in Littorina. Evolution. 74(7), 1482–1497. mla: Perini, Samuel, et al. “Assortative Mating, Sexual Selection, and Their Consequences for Gene Flow in Littorina.” Evolution, vol. 74, no. 7, Wiley, 2020, pp. 1482–97, doi:10.1111/evo.14027. short: S. Perini, M. Rafajlović, A.M. Westram, K. Johannesson, R.K. Butlin, Evolution 74 (2020) 1482–1497. date_created: 2020-06-22T09:14:21Z date_published: 2020-07-01T00:00:00Z date_updated: 2023-08-22T07:13:38Z day: '01' ddc: - '570' department: - _id: NiBa doi: 10.1111/evo.14027 ec_funded: 1 external_id: isi: - '000539780800001' file: - access_level: open_access checksum: 56235bf1e2a9e25f96196bb13b6b754d content_type: application/pdf creator: dernst date_created: 2020-11-25T10:49:48Z date_updated: 2020-11-25T10:49:48Z file_id: '8808' file_name: 2020_Evolution_Perini.pdf file_size: 1080810 relation: main_file success: 1 file_date_updated: 2020-11-25T10:49:48Z has_accepted_license: '1' intvolume: ' 74' isi: 1 issue: '7' language: - iso: eng month: '07' oa: 1 oa_version: Published Version page: 1482-1497 project: - _id: 265B41B8-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '797747' name: Theoretical and empirical approaches to understanding Parallel Adaptation publication: Evolution publication_identifier: eissn: - '15585646' issn: - '00143820' publication_status: published publisher: Wiley quality_controlled: '1' related_material: record: - id: '8809' relation: research_data status: public scopus_import: '1' status: public title: Assortative mating, sexual selection, and their consequences for gene flow in Littorina tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 74 year: '2020' ...