外来ザリガニ飼育・販売禁止　２日から特定生物

　アメリカザリガニを除く外来種のザリガニ全種が「特定外来生物」に指定され、飼育や販売が２日から原則禁止となった。逃げたり捨てられたりした場合、生態系に悪影響を及ぼす恐れがあるため。一方、アメリカザリガニは飼育している人が多く、指定すると野外への遺棄が懸念され、今回は対象から外れた。
　特定外来生物は、生態系や人の生命・身体、農林水産業に被害を及ぼす恐れのある外来種で、強い毒を持つ南米原産の「ヒアリ」などが指定されている。（2020/11/02-15:20）

Raising and selling of all nonnative species of crayfish, excluding red swamp crayfish, became prohibited in principle in Japan on Monday, with such species added to the list of invasive foreign creatures.
   The addition came as such nonnative crayfish are feared having negative effects on existing ecosystems if they escape or are dumped in nature.
   Meanwhile, red swamp crayfish, whose scientific name is procambarus clarkii, was exempt from the ban this time, due to growing concerns that many of them could be abandoned in Japan if the species is added to the list, as many people in the country are raising them.
   The list covers nonnative creatures that may cause harm to ecosystems, the human body or the agriculture, forestry and fisheries industries, such as the venomous fire ant, native of South America.
   Species newly added to the list are foreign crayfish belonging to four groups, including marbled crayfish, which reproduce without fertilization, and dwarf crayfish, popular in Japan as a pet.