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. 2021 Mar 23;11:6667. doi: 10.1038/s41598-021-86116-2

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Contingent composition of Northwest Atlantic mackerel age ≥ 2 adult samples by region at capture through January and May collected in 2013–2019. The four regions (MAB, SNE, GB, GOM) are shown in outlined boxes. Each pie chart indicates the number of samples collected within each region, and is proportional to the sample size. The map was created in R using the ggplot2 package version 3.3.2 URL: https://ggplot2.tidyverse.org⁷³.