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Diel vertical migrations of individual migrating anguillid silver eels tagged with pop-up satellite transmitters in the WNA (A; Aarestrup et al., 2009), WNP (B; S. Watanabe Unpubl. Data), and in the in the WSP (C, D; Schabetsberger et al. 2013, 2015). Grey areas indicate night time periods.
