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Fig. 50. Vertical distribution of six size ranges of anguillid leptocephali (Anguilla rostrata and Anguilla anguilla combined) that were collected in the Sargasso Sea during spring, summer, and fall of 1983–1985 using a 2 m ring net during both day (white bars) and night (black bars) in the study of Castonguay and McCleave (1987a). Catches are plotted as a percentage of total density of leptocephali within each size class based on the amount of water filtered by the net during all the tows. Zeros show the depth ranges where no leptocephali were collected, and based on clear patterns of catches in the earlier cruises, some shallower depths during the day and deeper depths at night where no leptocephali were collected, were not sampled during the later cruises. Redrawn from Castonguay M, McCleave JD, Vertical distributions, diel and ontogenetic vertical migrations and net avoidance of leptocephali of Anguilla and other common species in the Sargasso Sea, Journal of Plankton Research, 1987, 9(1), 195–214, by permission of Oxford University Press.

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