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- W2912569997 abstract "Abstract Identifying trends and drivers of fish growth in commercial species is important for ongoing sustainable management, but there is a critical shortage of long‐term datasets in marine systems. Using otolith (ear bone) sclerochronology and mixed‐effects modeling, we reconstructed nearly four decades (37 yr) of growth across four oceanographically diverse regions in an iconic fishery species, snapper ( Chrysophrys auratus ). Growth was then related to environmental factors (sea surface temperature, chlorophyll‐ a , and Southern Oscillation Index) and population performance indicators (recruitment and commercial catch). Across the decades, growth rates declined in the two most productive fishery regions. Chlorophyll‐ a (a measure of primary productivity) was the best predictor of growth for all regions, but direction and magnitude of the relationships varied, indicating regional‐specific differences in intra‐specific competition. Sea surface temperature was positively correlated with fish growth, but negatively correlated after temperature reached optimum thermal maxima, which suggests individuals in warmer regions may be under thermal stress. Growth also decreased at the extremes of the Southern Oscillation Index, indicating fish growth is impeded in significant climatic events. Contrasting relationships between growth, catch, and recruitment indicated regional‐specific density‐dependent effects, with growth positively correlated with population size in one region but negatively correlated in another. Our results indicate that under future ocean warming and increased frequency of extreme climate events, fish growth and fisheries productivity are likely to be affected. Furthermore, the interactive effects of extrinsic factors also indicated that stressors on fisheries should be managed collectively. We show that otolith chronologies are an effective method to assess long‐term trends and drivers of growth in fishery species. Such informed ecological predictions will help shape the sustainable management of fisheries under future changing climates." @default.
- W2912569997 created "2019-02-21" @default.
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- W2912569997 date "2019-01-01" @default.
- W2912569997 modified "2023-10-12" @default.
- W2912569997 title "Using otolith chronologies to understand long‐term trends and extrinsic drivers of growth in fisheries" @default.
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- W2912569997 doi "https://doi.org/10.1002/ecs2.2553" @default.
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