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Diving activity in the shallow diver group. Data show diving depth and duration (mean ± SD) for the 6 individuals in the shallow diver group. On day 1, all performed 3 dives; on days 2 and 3, all performed 2 dives; on day 4, only 5 of 6 each performed one dive; on day 5, all 6 performed 1 dive; on day 6, three divers each performed 2 dives; and on day 7, four divers performed 2 dives.
