Environmental drivers of herring growth and how the perception shifts with time series length

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cjfas-2021-0176.pdf

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http://eprints.org/relation/isVersionOf https://pure.iiasa.ac.at/id/document/100663 http://eprints.org/relation/isVolatileVersionOf https://pure.iiasa.ac.at/id/document/100663 http://eprints.org/relation/issmallThumbnailVersionOf https://pure.iiasa.ac.at/id/document/100663 archive 353 disk0/00/01/85/92 2023-01-31 08:54:36 2023-01-31 08:54:36 2023-01-31 08:54:36 article show Claireaux M. Zimmermann F. Ernande B. 7797 Heino M. 7602 0000-0003-2928-3940 Enberg K. Environmental drivers of herring growth and how the perception shifts with time series length pub ASA CAT EM Growth is a key component of population dynamics and, thus, fisheries management, yet drivers of its variations are often poorly understood. Using individual data collected over 80 years, we explored how environmental drivers affect growth in a major population of Atlantic herring (Clupea harengus). The results confirm that intrinsic factors (age and maturation) determine growth to a large degree but also that extrinsic factors such as temperature have some influence. While the role of intrinsic factors was independent of time series length, the importance of extrinsic drivers varies strongly with the analysed time period. It remains unclear whether this is caused by data inconsistencies back in time, spurious correlations appearing in shorter time series, shifts in population dynamics, or dynamic interactions between variables that cannot be determined with current data. Generally, environmental effects on growth became less clear and relevant with increasing time series length. What drives variation in growth may therefore change over time, potentially due to impacts such as fishing or climate change. It also underlines that seemingly clear correlations can break down or change their sign over time; hence, caution is advised when interpreting results from time series of 20–40 years. 2022-01-31 published NRC Research Press doi:10.1139/cjfas-2021-0176 1238 122 public Canadian Journal of Fisheries and Aquatic Sciences 79 8 1282-1290 TRUE 1205-7533 no info:eu-repo/semantics/article