|| 要旨トップ | 目次 |||日本生態学会第69回全国大会 (2022年3月、福岡) 講演要旨
一般講演（ポスター発表） P2-258 （Poster presentation）
Accidental release of exotic pets is an important mechanism that introduces non-native species into native environments. The introduction of exotic birds, for example, Chinese hwamei (Garrulax canorus) and Rose-ringed parakeet (Psittacula krameri), that have established populations in Japan, is considered partly because of the release of pet birds. Exotic birds are popular pets in Japan after dogs, cats, goldfish, and insects. Thus, it is important to evaluate their potential impact to the environments as a source of alien species. In a previous study using datasets from Internet resources, we found that about 9,000 birds were reported to have escaped from households to the outdoors in three years and the number of escapes was higher in prefectures with populated cities. In the present study, we estimated the number of birds sold as pets in Yokohama, a populated city in Japan, to understand the distribution of pet birds in households, which could be a source of non-native species if they escaped.