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. 2020 Jan 31;10:1554. doi: 10.1038/s41598-020-58028-0

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© The Author(s) 2020

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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Trend of the significant cubic regression splines implemented in the GAMs described in Table 2. Only significant environmental factors are considered. Upper panels refer to models not including the LRI index among the factors, with (a) using the entire available time series and (b) excluding the first year (1997 for the environmental factors and 1998 for the anchovy acoustic biomass estimate. Panels c1,2) and d1,2) refer to models that include the LRI index, again with (c) panels using the entire available time series and (d) panels excluding the first year. See text for further details.