Frequency distributions. a) Frequency distribution of bottom depth across all seals (n = 3,269) based on the number of dive locationsobtained from the SRDL tags. b) Frequency distribution of maximum dive depth across all seals (n = 3,269) based on number of dive locationsobtained from the SRDL tags.doi:10.1371/journal.pone.0080438.g002Diving Behaviour by Hooded SealsPLOS ONE | www.plosone.org 5 November 2013 | Volume 8 | Issue 11 | e80438