After sampling and measurement, we administered the antagonists naloxone Naloxone hydrochloride intravenous injection, 0.
We speculate that raccoons had a high range of δ 13C values because they consumed corn and livestock-forage crops, which had the highest δ 13C values of potential food items in our study area because they include C4 plants.
Hair samples from raccoons captured for nuisance control and a raccoon dog carcass found in Nopporo Natural Forest Park were also collected.
The number of captured raccoon dogs was fewer than 17 from 2004 to 2013.