Histograms showing the percentages of the four participant characteristics of the aquatic mammal species involved in death events from Social relationships and death-related behaviour in aquatic mammals: a systematic review.

Supplementary material S5. Histograms showing the number of cases (%) for each (a) cetacean and (b) non-cetacean species, the grieving relationship for (c) cetacean and (d) non-cetacean and the sex for (e) cetaceans for the known cases only. For non-cetaceans the sex has been determined to exclusively Female with only 1 unknown case. Carcass state is showed in (f) for cetacean and (g) for non-cetacean, presence of other individuals involved in (h) for cetacean and (i) for non-cetacean.