Really ?
I certainly know of villages/communities where the people living there had been isolated from Western culture. They spoke little English and lived off the land.
That was almost 45 years ago, while times have changed somewhat, I can assure you that Fredrick Minshall did see what he said.
Today, many of the folks on the islands eat subsistence type foods because the food is fresher, more nutritional and it's available. It's what they were raised on.
I am getting ready to start gathering certain "greens" or plants that I use for medicine for myself. Looking forward to sea asparagus for fresh salads and to put up in jars.  Top off my salmon with sprinkles of sea weed. 
Ate lots of venison this winter. My two son in laws each brought us one. They fished for us too.
As a child in NM, before I moved to Alaska 44 years ago, I lived on a reservation where the only red meat in the winter was from deer or elk. We ate it fresh and dried.  
Spring and summer mutton from the sheep herds.