Assertion: male narwhal | /r/CapableOf | use their tusks
Facets:
value: as a kind of pick
type: PURPOSE
value: to fence in duels
type: PURPOSE
value: to determine social rank
type: PURPOSE
value: according to researchers
type: OTHER
value: to find food
type: PURPOSE
value: to find mates
type: PURPOSE
Source sentences:
text: According to researchers, male narwhals use their tusks to find food or mates.
text: There is no evidence to show that male narwhals use the tusks to fence in duels with each other as once thought, though males have been seen touching their tusks with other males in non-combative interactions.
text: It is more likely that male narwhals use the tusk to determine social rank, similar to the antlers of a stag.
text: Other theories are that male narwhals might use their tusks as a kind of pick to break through or break up channels in the ice, or that the size of the tusk is a visual indicator used by females for mate-selection.