Assertion: snail's size | /r/CapableOf | decline on the channel islands
Facets:
value: due to human predation.[citation
type: CAUSE
value: significantly
type: DEGREE
Source sentences:
text: On the Channel Islands, where abalones were harvested by Native Americans for at least 12,000 years, the size of red abalone shells found in middens declines significantly after about 4000 years ago, probably due to human predation.[citation needed]