|| 要旨トップ | 目次 |||日本生態学会第65回全国大会 (2018年3月、札幌) 講演要旨
一般講演（口頭発表） E01-02 （Oral presentation）
Since multiple introductions in the 1970’s and 80’s via the pet trade, the North American raccoon (Procyon lotor) has invaded most of mainland Japan. Responsible for agricultural loss, damage to temples and shrines, and disease transmission, the raccoon has become a significant management problem. Although a mesopredator in its native range, the raccoon is an apex predator across much of Japan, and thus poses a threat to ecological communities. We were interested in how raccoons interact with two resident carnivorans, the invasive masked palm civet (Paguma larvata) and the native raccoon dog (Nyctereutes procyonoides) in urban and rural areas. We used data from a 6-year (2010 – 2015) raccoon trapping effort in Kanagawa to build a multi-year, multi-species occupancy model. The model estimates co-occurrence probability as a function of environmental variables, and allowed us to examine spatiotemporal patterns of co-occurrence. Our preliminary results indicate that: 1) although all species prefer forest and cropland, raccoon occupancy is higher with N. procyonoides presence and P. larvata absence, 2) as wetland coverage increases, raccoon occupancy is higher when the other carnivorans are absent, 3) and after accounting for imperfect detection and species interactions, raccoon occupancy has increased in central and eastern Kanagawa over time.