Assertion: melon headed whale | /r/HasAspect | matrilineal social structure
Facets:
Source sentences:
text: Data from mass strandings in Japan suggest melon-headed whales may have a matrilineal social structure (i.e., related through female kin/groups organized around an older female and their relatives); the biased sex ratio (higher number of females) of the stranding groups suggesting mature males may move between groups.