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Fig. 4
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Bivariate distributions of SST and Chl-a for sardine ((a) WAOI; (c) SAOI) and chub mackerel ((b) WAOI; (d) SAOI) catches for depths between 20 and 60 m, for 2014–2015. The black rectangles identify SST and Chl-a ranges used in Figure 5.
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