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11:58 AM PST -- A rep for AB is now revealing the rapper had complications from ongoing hernia issues from his powerlifting days.

Action Bronson underwent emergency surgery in an Alaskan hospital ... hours after he sampled a ton of unique delicacies ... including caribou and whale.

Bronson was in the Great White North to shoot his food web series, "F**K, That's Delicious," when he landed in the hospital. A rep for the NYC rapper wouldn't say why AB needed surgery ... but told us, "he's good" after the operation.

On a possibly related note -- Bronson's been devouring an Alaskan smorgasbord of things like Bowhead whale, Beluga whale blubber, and raw caribou meat.