すஅᓥࡢ㝣ୖ⠇㊊ື≀᳃ ⱥ❶ 1*ࠊᓊᮏᖺ㑻 2ࠊᑎ⏣ ๛ 1ࠊỌ㔝 ⿱ 1ࠊⱉ㒊 ἞⣖ 3ࠊᕝୖ ࿴ே 4

Terrestrial arthropods of Nishinoshima IslandHideaki MORI1*, Toshio KISHIMOTO2, Takeshi TERADA3, Hiroshi NAGANO,Haruki KARUBE3 & Kazuto KAWAKAMI4
1. ⮬↛⎔ቃ◊✲ࢭࣥࢱ࣮㸦ࠛ130-8606 ᮾி㒔ቚ⏣༊Ụᮾᶫ 3-3-7㸧
Japan Wildlife Research Center, 3-3-7 Kotobashi, Sumida, Tokyo 130-8606, Japan.
2. ࡩࡌࡢࡃ࡟ᆅ⌫⎔ቃྐ࣑࣮ࣗࢪ࢔࣒㸦ࠛ422-8017 㟼ᒸ┴㟼ᒸᕷ㥴Ἑ༊኱㇂ 5762㸧
Museum of Natural and Environmental History, Shizuoka, 5762 Oya, Suruga, Shizuoka,Shizuoka 422-8017, Japan3. ⚄ዉᕝ┴❧⏕࿨ࡢ࣭ᫍᆅ⌫༤≀㤋㸦ࠛ250-0031 ⚄ዉᕝ┴ᑠ⏣ཎᕷධ⏕⏣ 499㸧Kanagawa Prefectural Museum of Natural History, 499 Iryuda, Odawara, Kanagawa 250-   0031, Japan4. ᳃ᯘ⥲ྜ◊✲ᡤ㸦ࠛ305-8687 Ⲉᇛ┴ࡘࡃࡤᕷᯇࡢ㔛 1㸧
Forestry and Forest Products Research Institute, 1 Matsunosato, Tsukuba, Ibaraki 3058687, Japan* hmori@jwrc.or.jp (author for correspondence)せ᪨ 2019 ᖺ 9 ᭶ࠊすஅᓥ࡟࠾࠸࡚ࠊึࡵ࡚ᑓ㛛ᐙ࡟ࡼࡿ㝣ୖ⠇㊊ື≀ࡢୖ㝣ㄪᰝࡀ⾜ࢃࢀࡓࠋ2013 ᖺࡼࡾᗘ㔜࡞ࡿⅆᒣάື࡟ࡼࡗ࡚࡯ࡰࡍ࡭࡚ࡢᆅᇦࡀ⁐ᒾ࡟そࢃࢀࡓ୍᪉ࠊ୍㒊ⲡᆅࡀṧࡉࢀࡓࠋᐃ㔞ㄪᰝ࡜ᐃᛶㄪᰝࢆ୪⾜ࡋ࡚ᐇ᪋ࡋࠊᪧᓥ㒊࡟ṧᏑࡍࡿ⠇㊊ື≀ࢆ☜ㄆࡍࡿ࡜࡜ࡶ࡟ࠊ᪂ࡓ࡟ᙧᡂࡉࢀࡓ኱ᆅ࡬ࡢ㐍ฟ≧ἣࢆ᫂ࡽ࠿࡟
ࡍࡿࡇ࡜࡜ࡋࡓࠋ4 ⥘ 15 ┠ 28 ⛉ 33 ✀ࡢ㝣ୖ⠇㊊ື≀ࢆ☜ㄆࡋࡓࠋ࠺ࡕ 21 ✀ࡣྠᓥ࠿ࡽึࡵ࡚☜ㄆࡉࢀࡓࠋ᪤Ꮡࡢグ㘓ࢆຍ࠼ࡿ࡜ࡇࢀࡲ࡛࡟すஅᓥ࠿ࡽ☜ㄆࡉࢀࡓ㝣ୖ⠇㊊ື≀ࡣᑡ࡞ࡃ࡜ࡶ 44 ✀࡜࡞ࡿࠋ≉࡟ 2013 ᖺᄇⅆᚋ࡟᪂ࡓ࡟ᙧᡂࡉࢀࡓ᳜⏕ࡢ࡞࠸⁐ᒾྎᆅ࡟࠾࠸࡚ᾏ㫽ࡢṚయୗࡼࡾࢺࣅ࣒ࢩࠊࢧࢧࣛࢲࢽ➼ࡢᅵተศゎ⪅ࡀⓎぢࡉࢀࡓࡇ࡜ࡣ୍ḟ㑄⛣ࡢ㐣⛬࡟㛵ࡍࡿ᪂ࡓ࡞どᗙࢆᥦ♧ࡍࡿࡶࡢ࡛࠶ࡿࠋ୍

− 95 −᪉ࠊእ᮶✀࡛࠶ࡿ࣡ࣔࣥࢦ࢟ࣈࣜࡀṧᏑࡋ࡚࠸ࡿࡇ࡜ࡀ☜ㄆࡉࢀࠊᑐ⟇ࡢᐇ᪋ࡀᮃࡲࢀࡿࠋࢺࣛࢵࣉࢆ⏝࠸ࡓᐃ㔞ㄪᰝࡶ⾜ࢃࢀࡓࡇ࡜࡟ࡼࡾ௒ᚋࡢ⥅⥆ⓗ࡞ࣔࢽࢱࣜࣥࢢࡢᇶ♏᝟ሗ࡜࡞ࡿࠋ࣮࣮࢟࣡ࢻ ୍ḟ㑄⛣ࠊᾏὒᓥࠊእ᮶᪻⹸ࠊᅵተື≀ࠊࣔࢽࢱࣜࣥࢢ㸯㸬ࡣࡌࡵ࡟ すஅᓥࡣࠊᮾிᮏᅵ㒊࠿ࡽ 1,000km ࡯࡝༡᪉ࠊ࠾ࡼࡧᑠ➟ཎㅖᓥ∗ᓥࡼࡾ⣙ 130km
す᪉ࡢኴᖹὒୖ࡟Ꮡᅾࡍࡿᾏὒᓥ࡛࠶ࡿࠋ1973 ᖺ࡟᭷ྐ௨᮶ึࡢᄇⅆࡀ☜ㄆࡉࢀࠊ᪂ᓥࡀᪧᓥ࡜᥋⥆ࡋࡓ㸦㟷ᮌ࣭ᑠᆏࠊ1974㸧
ࠋ2013 ᖺ࡟ࡣ 40 ᖺࡪࡾ࡟ᄇⅆࡋࠊ⌧ᅾ࡟⮳ࡿࡲ࡛᩿⥆ⓗ࡟ⅆᒣάືࡀ☜ㄆࡉࢀ࡚࠸ࡿ㸦୰㔝࡯࠿ࠊ ๓㔝࣭ྜྷᮏࠊ2020㸧ࠋ
2013 ᖺ௨㝆ࡢᄇⅆ࡟ࡼࡿ⁐ᒾࡢὶฟ࡟ࡼࡾࡇࢀࡲ࡛ࡢᓥࡢ኱㒊ศࡀ᪂ࡓ࡞⁐ᒾ࡟そࢃࢀࠊࢃࡎ࠿࡟ṧࡉࢀࡓᪧすஅᓥ⏤᮶ࡢྎᆅୖࢆ㝖ࡁ᪤Ꮡࡢ⏕ែ⣔ࡀኻࢃࢀࡓࠋ୍᪉ࠊ㠃✚ࡣ⣙ 10 ಸ࡜࡞ࡾࠊ◁♟὾ࡢᩘࡸ㠃✚ࡶቑຍࡋࡓࡇ࡜࠿ࡽ⠇㊊ື≀ࡢ⛣ධࡸᐃ╔ࡢᶵ఍ࡀቑຍࡍࡿࡇ࡜ࡶ⪃࠼ࡽࢀࡿࠋࡇ࠺ࡋࡓ⌧ᅾࡢすஅᓥࡢ⎔ቃࡣࠊᑠ➟ཎㅖᓥࡢࡼ࠺࡟㏆㞄ࡢ኱㝣ࡸᓥᕋ࠿ࡽ㐲ࡃ㞳ࢀࡓᾏὒᓥࡀ᪂ࡓ࡟ฟ⌧ࡋࡓ㝿࡟ࠊ࡝ࡢࡼ࠺࡟⏕ែ⣔ࡀᵓ⠏ࡉࢀ࡚࠸ࡃ࠿ࢆほᐹࡍࡿࡓࡵࡢୡ⏺࡟ࡶ౛ࡢ࡞࠸ᶵ఍ࢆᥦ౪ࡋ࡚࠸ࡿࠋࡑࡇ࡛ࠊすஅᓥࡢྛᆅᇦ࡟⏕ᜥࡍࡿ⠇㊊ື≀ࡢ᭱᪂ࡢ≧ἣࢆグ㘓ࡋࠊ୍ḟ㑄⛣࡟࠾ࡅࡿ⠇㊊ື≀ࡢ౵ධ࡜ᐃ╔ࠊࡲࡓࡣ⤯⁛ࡢ㐣⛬ࢆࣔࢽࢱࣜࣥࢢࡍࡿࡓࡵࡢᇶ♏᝟ሗࢆ཰㞟ࡍࡿࡇ࡜ࢆ┠ⓗ࡟ㄪᰝࢆᐇ᪋ࡋࡓࠋ
ࡲࡓࠊᄇⅆ┤ᚋ࡛࠶ࡿすஅᓥࡢ⁐ᒾྎᆅࡣᮍࡔ⏕≀ࡢ࡯࡜ࢇ࡝ࡀ⏕ᜥ࣭⏕⫱࡛ࡁ࡞࠸≧ែ࡜⪃࠼ࡽࢀࡿࠋࡋ࠿ࡋࠊᪧᓥ㒊࡟ࡣࢃࡎ࠿࡞᳜⏕ࡀṧࡗ࡚࠸ࡿ࡯࠿ࠊ⁐ᒾྎᆅࡸᾏ὾㒊࡛ࡶᾏ㫽ࡢ⦾Ṫࡀ⾜ࢃࢀࡿࡇ࡜࠿ࡽࠊ᤼ἥ≀ࡸྤࡁᡠࡋࠊṚయࡀᰤ㣴ศ࡜ࡋ࡚౪⤥ࡉࢀ࡚࠸ࡿࠋ㈨※ࡢࡈࡃஈࡋࡃ㐣㓞࡞⎔ቃ࡟㐍ฟࠊᐃ╔ࡍࡿ⠇㊊ື≀ࡀᏑᅾࡍࡿ࠿ࢆ☜ㄆࡍࡿ࡜࡜ࡶ࡟ࠊࡑࡢ⏕ែ⣔ᶵ⬟࡟ࡘ࠸࡚⪃ᐹࡍࡿࠋ2017 ᖺࡼࡾ⎔ቃ┬࡟ࡼࡿ⥲ྜᏛ⾡ㄪᰝࡀィ⏬ࡉࢀࡓࡀࠊ2017 ᖺࠊ2018 ᖺࡣᄇⅆάືࡀάⓎ໬ࡋࡓࡓࡵୖ㝣ㄪᰝࡣᘏᮇ࡜࡞ࡾࠊ2019 ᖺ 9 ᭶࡟ୖ㝣ㄪᰝࡀᐇ᪋ࡉࢀࡿ
ࡇ࡜࡜࡞ࡗࡓࠋ࡞࠾ࠊすஅᓥࡢ⠇㊊ື≀࡟ࡘ࠸࡚ࡣ 1983 ᖺ㸦኱ἑ࣭಴⏣ࠊ1983㸧ࠊ
2004 ᖺ㸦Abe, 2006㸧ࠊ2012 ᖺ㸦ᮾி㒔ᑠ➟ཎᨭᗇᅵᮌㄢ⮬↛බᅬಀࠊ2013㸧࡟௚ศ㔝ࡢᑓ㛛ᐙ➼ࡢୖ㝣ㄪᰝ࡟ࡼࡾグ㘓ࡉࢀࡓࡶࡢࡀࢃࡎ࠿࡟▱ࡽࢀࡿࡢࡳ࡛࠶ࡗࡓࠋࡲࡓࠊ2013 ᖺᄇⅆ௨㝆࡛ࡣࠊ2016 ᖺ㸦୰㔝࡯࠿ࠊ2017㸧ࡢୖ㝣ㄪᰝࠊ2018 ᖺ࡟ UAVࢆ⏝࠸ࡓ⏕≀᥇㞟࡛グ㘓ࡉࢀ࡚㸦⮬↛⎔ቃ◊✲ࢭࣥࢱ࣮ࠊ2019㸧࠸ࡿࡀࠊࡇࢀࡽࡶ௚ศ㔝ࡢᑓ㛛ᐙ࡟ࡼࡿㄪᰝ࡟ྜࢃࡏ࡚ᚓࡽࢀࡓ᩿∦ⓗ࡞᝟ሗ࡛࠶ࡾࠊ2019 ᖺࡢㄪᰝࡣึࡵ࡚ᑓ㛛ⓗ࡞ㄪᰝ࡜ࡋ࡚ᐇ᪋ࡋࡓࡶࡢ࡜࡞ࡿࠋ− 96 −㸰㸬ᮦᩱ࡜᪉ἲ すஅᓥ࡬ࡢୖ㝣ㄪᰝࡣࠊ2019 ᖺ 9 ᭶ 3㹼5 ᪥ࡢ 3 ᪥㛫ࠊᓊᮏࠊ᳃࡟ࡼࡗ࡚ᐇ᪋ࡉ
ࢀࡓࠋᙜึ 5 ᪥㛫ࡢୖ㝣࡟ࡼࡾᓥࡢᮾす༡໭ࡑࢀࡒࢀࡢ὾࠿ࡽୖ㝣ࡍࡿࡇ࡜ࡀ᝿ᐃ
ࡉࢀ࡚࠸ࡓࡀࠊྎ㢼ࡢ᥋㏆࡟క࠸ࠊ9 ᭶ 3 ᪥ࠊ4 ᪥ࡣすஅ὾࠿ࡽࠊ9 ᭶ 5 ᪥࡟ࡣ༡す὾࠿ࡽࡢୖ㝣࡟㝈ᐃࡉࢀࡓࠋࡲࡓࠊ9 ᭶ 4 ᪥࡟ࡘ࠸࡚ࡣ᪥ἐᚋ 2 ᫬㛫ࡢࡳࠊᪧᓥྎᆅཬࡧすஅ὾ࡢ୍㒊࡛ኪ㛫ㄪᰝࢆ⾜ࡗࡓࠋ ࡞࠾ࠊ2016 ᖺ 10 ᭶ 20 ᪥࡟ᕝୖࡀୖ㝣ㄪᰝࢆ⾜࠸ࠊ⠇㊊ື≀ࡢ᥇㞟ࢆ⾜ࡗࡓࠋࡲࡓࠊ2018 ᖺ 7 ᭶ 13㹼14 ᪥ࠊ9 ᭶ 8㹼10 ᪥ࠊ10 ᭶ 14 ᪥࡟ࡣ⎔ቃ┬࡯࠿࡟ࡼࡾὒୖ࡛ࡢ⠇㊊ື≀᥇㞟ㄪᰝࢆ⾜ࡗࡓࠋࡇࢀࡽࡢ⤖ᯝ࡟ࡘ࠸࡚ࡶࡇࡇ࡟ేࡏ࡚グ㘓ࡍࡿࠋ㸰㸫㸯㸬すஅᓥ࡟࠾ࡅࡿ⠇㊊ື≀┦ࡢᢕᥱすஅᓥ࡟࠾ࡅࡿ⠇㊊ື≀┦ࢆᢕᥱࡍࡿࡓࡵࠊྍ⬟࡞⠊ᅖࢆ㋃ᰝࡋࠊࢫ࢘࢕̿ࣆࣥ
ࢢ㸦ࢿࢵࢺཱྀᚄ 60cm㸧ࠊỈษࡾ࠿ࡈࢆ⏝࠸ࡓࣁࣥࢻࢯ࣮ࢸ࢕ࣥࢢ㸦Ỉษࡾ࠿ࡈ L30cmW20cmH10cm㸧ࠊ▼࠾ࡇࡋ᥇㞟➼ࡢᡭἲࢆ⏝࠸ࠊ⏕ᜥࡍࡿ⠇㊊ື≀ࡢ௵ព᥇㞟ࢆ⾜࠸グ㘓ࡋࡓࠋࡲࡓࠊᅵተື≀࡟ࡘ࠸࡚ࡣ⾲ᒙࡢᅵተࢆᆅⅬࡈ࡜࡟㸯L ⛬ᗘ᥇ྲྀࡋࠊ┠ྜ࠸ࡀ༑ศ࡟ᑠࡉ࠸Ὑ℆ࢿࢵࢺ࡟ධࢀ࡚㐓ฟ㜵Ṇᑐ⟇ࢆ᪋ࡋࡓୖ࡛ᣢࡕᖐࡗࡓࠋㄪᰝ⯪ෆࡢࢲ࣮ࢸ࢕࣮࣒ࣝ㸦ࣇ࢕࣮ࣝࢻ㸻すஅᓥ࡜ྠࡌ࡜఩⨨௜ࡅࡿసᴗᐊࠊ
ࡇࡢ㒊ᒇࡢ୰ࡣすஅᓥ࡜ྠᵝ࡜ࡋࠊ㒊ᒇࡢእ㒊࡬⏕≀ࡀ㐓ฟࡍࡿࡇ࡜ࢆ㜵ࡄฎ⨨ࡀ᪋ࡉࢀࡓ㸧࡟࡚ࢶࣝࢢࣞࣥ⿦⨨㸦L36.5cmW36.5cmH52.5cm㸧ࢆ฼⏝ࡋ࡚ᅵተື
≀ࢆ᳨ฟࡋࡓࠋࢶࣝࢢࣞࣥ⿦⨨࡟⏝࠸ࡿᅵተࡢ㔞ࡣྠᵝ⎔ቃࡢ㠃✚ࡢ 1/100 ᮍ‶ࡢ㠃✚࠿ࡽ᥇ྲྀࡍࡿࡇ࡜࡜ࡋࡓࠋ
࡞࠾ࠊ2016 ᖺㄪᰝ࡟࠾࠸࡚ࡣࢫ࢘࢕࣮ࣆࣥࢢࠊᆅ⾲㠃࠾ࡼࡧ࢜ࢼ࣑࢞ࢬࢼࢠࢻࣜ
ࡢᕢᮦෆ࡛ࡢぢࡘࡅ᥇ࡾࢆ⾜ࡗࡓࠋ2018 ᖺㄪᰝ࡟࠾࠸࡚ࡣ 7 ᭶࡟すஅᓥἈ࡟࠾ࡅࡿ
ࣛ࢖ࢺࢺࣛࢵࣉ㸦ㄪᰝ⯪ࣛ࢖ࢺ࡟ࡼࡿ㸧ࠊ9 ᭶ࡣ UAV ࡟྾ᘬᶵ㸦Dyson V8 Fluffy㸧ࢆྞࡾୗࡆ࡚⾜࠺྾ᘬ᥇㞟ࠊ࠾ࡼࡧ UAV ࡟ࡼࡿ࣮ࣟ࢞࣎ࢵࢡࢫࡢᅇ཰᫬࡟ΰධࡋ࡚࠸ࡓ⏕≀ࡢ᥇㞟ࠊ10 ᭶ࡣࢡ࣮ࣝࢬ୰ࡢ⏥ᯈ࡟࠾ࡅࡿぢࡘࡅ᥇ࡾ࡟ࡼࡾ⾜ࡗࡓࠋ㸰㸫㸰㸬ࢺࣛࢵࣉࢆ⏝࠸ࡓ⠇㊊ື≀⩌㞟ࡢࣔࢽࢱࣜࣥࢢすஅᓥ࡟࠾ࡅࡿ⠇㊊ື≀⩌㞟ࡢኚ໬ࢆᢕᥱࡍࡿࡓࡵࠊࢺࣛࢵࣉࢆ⏝࠸ࡓᐃ㔞ࣔࢽࢱࣜࣥࢢࢆ⾜ࡗࡓࠋ」ᩘࡢᡭἲࢆ⏝࠸ࡿࡇ࡜ࡣ㸰㸫㸯࡟࠾ࡅࡿᮏᓥࡢ⠇㊊ື≀┦ࡢゎ᫂࡟ࡶᐤ୚ࡍࡿ࡜⪃࠼ࡽࢀࡿࠋࡓࡔࡋࠊࢺࣛࢵࣉㄪᰝ࡛ࡣ᥇㞟㔞ࢆไ㝈ࡍࡿࡇ࡜ࡀ㞴ࡋ࠸ሙྜࡀ࠶ࡿࡓࡵࠊ᥇㞟ࡀᙳ㡪ࡍࡿ㠃✚ࡀ༑ศ࡟ᑠࡉࡃ࡞ࡿࡼ࠺࡟㸦ྠᵝࡢ⎔ቃࡢ㠃✚ࡢ 1/100 ᮍ‶࡟㸧タᐃࡋࠊ✀ࡸ⏕ែ⣔࡬ࡢᙳ㡪ࢆ᭱ᑠ㝈࡟ᢚ࠼ࡽࢀࡿᡭἲ࡜ࡋࡓࠋ࣭⢓╔ࢺࣛࢵࣉἲ㸦ᪧᓥࠊすஅ὾ࠊ༡す὾㸧− 97 −୺࡟ᆅ⾲ᚔᚉᛶࡢ⠇㊊ື≀ࢆ☜ㄆࡍࡿࡓࡵࠊᶞ⬡〇ࡢ⢓╔ࢺࣛࢵࣉ㸦/FP
:FP+FP㸧ࢆタ⨨ࡋࡓࠋࢺࣛࢵࣉࡢタ⨨㛫㝸ࡣ P ௨ୖ࡜ࡋࠊ⠇㊊ື≀⩌㞟ࡢ᧠஘ࢆ᭱ᑠ㝈࡜ࡍࡿࡼ࠺࡟㓄៖ࡋࡓࠋ࣭ࣃࣥࢺࣛࢵࣉἲ㸦ᐇ᪋ሙᡤ㸸ᪧᓥࠊ༡す὾㸧୺࡟ᑠᆺࡢ㣕⩧ᛶ᪻⹸ࢆ☜ㄆࡍࡿࡓࡵࠊᑡ㔞ࡢὙ๣ࢆຍ࠼ࡓỈࢆᙇࡗࡓ㯤Ⰽࡢ෇ᙧࣉࣛࢫࢳࢵࢡ─㸦FP'FP㸧࡟ㄏᘬࡋࡓࠋࢺࣛࢵࣉࡣ P ௨ୖࡢ㛫㝸ࢆ✵ࡅ࡚タ⨨ࡋࡓࠋ࣭ࣛ࢖ࢺࢺࣛࢵࣉἲ㸦ᐇ᪋ሙᡤ㸸ᪧᓥ㸧୺࡟ኪ⾜ᛶࡢ᪻⹸ࢆ☜ㄆࡍࡿࡓࡵࠊ⮬❧ᘧࣛ࢖ࢺࢺࣛࢵࣉ㸦/FP:FP+FP㸧ࢆ฼⏝ࡋࡓࠋ௒ᅇࡣᤕẅᘧࡢࢺࣛࢵࣉࡣ⏝࠸ࡎࠊㄪᰝ⪅࡟ࡼࡿ㑅ᢥⓗ࡞᥇㞟ࠊ࠾ࡼࡧ࢖ࣥࢱ࣮ࣂ࣓ࣝ࢝ࣛࢆ⏝࠸ࡓグ㘓ࢆ⾜ࡗࡓࠋᅗ  すஅᓥ࡟࠾ࡅࡿ⠇㊊ື≀ㄪᰝ఩⨨ᅗ࠾ࡼࡧㄪᰝᶵჾD ㄪᰝ఩⨨ᅗ㸦ᐇ⥺㸸⢓╔ࢺࣛࢵࣉࠊⅬ⥺㸸ࣃࣥࢺࣛࢵࣉࠊᫍ༳㸸ࣛ࢖ࢺࢺࣛࢵࣉ㸧E ⢓╔ࢺࣛࢵࣉࠊF ࣃࣥࢺࣛࢵࣉࠊG ࣛ࢖ࢺࢺࣛࢵࣉࠊH ࢶࣝࢢࣞࣥ⿦⨨ ᆅᅗࡣᅜᅵᆅ⌮㝔Ⓨ⾜ࡢࡶࡢࢆᨵኚࠋ)LJXUH/RFDWLRQPDSDQGWKHHTXLSPHQWRIWKHVXUYH\RQ1LVKLQRVKLPD,VODQG
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F3DQWUDSG/LJKWWUDSH7XOOJUHQIXQQHO− 98 −㸱㸬⤖ᯝ㸱㸫㸯㸬すஅᓥ࡟࠾ࡅࡿ⠇㊊ື≀┦ࡢᢕᥱ ⾲ 1 ࡟௒ᅇࡢㄪᰝ⤖ᯝࠊ࠾ࡼࡧ㐣ཤࡢㄪᰝ࡟࠾࠸࡚グ㘓ࡉࢀࡓ✀ࡢࣜࢫࢺࢆᩚ⌮ࡋࡓࠋ1983 ᖺ㸦኱ἑ࣭಴⏣ࠊ1983㸧ࠊ2004 ᖺ㸦Abe, 2006㸧ࠊ2012 ᖺ㸦ᮾி㒔ᑠ➟ཎᨭᗇᅵᮌㄢ⮬↛බᅬಀࠊ2013㸧ࡢグ㘓ࡢ࡯࠿ࠊ2016 ᖺㄪᰝ࡟ࡘ࠸࡚ࡣᕝୖ࡟ࡼࡿ᥇㞟⤖ᯝࢆࠊ2018 ᖺㄪᰝࡢグ㘓࡟ࡘ࠸࡚ࡣ⎔ቃ┬ㄪᰝ࡟ࡼࡿ⤖ᯝࢆྜࢃࡏ࡚ᥖ㍕ࡋࡓࠋ2019 ᖺࡢㄪᰝ࡛ࡣᑡ࡞ࡃ࡜ࡶ 4 ⥘ 15 ┠ 28 ⛉ 33 ✀ࡢ㝣⏕⠇㊊ື≀ࡀ☜ㄆࡉࢀࡓࠋ
ࡑࡢ࠺ࡕ 21 ✀ࡣྠᓥ࠿ࡽࡣࡌࡵ࡚☜ㄆࡉࢀࡓࡶࡢ࡛࠶ࡿࠋ᪤Ꮡࡢグ㘓ࢆຍ࠼ࡿ࡜ࠊࡇࢀࡲ࡛ᮏᓥ࡛☜ㄆࡉࢀࡓ㝣⏕⠇㊊ື≀ࡣᑡ࡞ࡃ࡜ࡶ 42 ✀࡜࡞ࡿࠋࢧࣥࣉࣝࢆ᥇㞟࣭☜ಖࡋࡓࡶࡢࡢᮍྠᐃࡢ✀ࡶⱝᖸṧࡉࢀ࡚࠸ࡿࡀࠊ௨ୗ࡟㏙࡭ࡿࡶࡢ࡟ࡘ࠸࡚ࡣಶయࢆ᥇㞟࣭☜ಖࡍࡿࡇ࡜ࡀ࡛ࡁࡎ࡟ࠊ✀ྠᐃ࡟☜ドࡀᣢ࡚࡞࠸ࡓࡵࠊ✀ࡢỴᐃࡣᶆᮏࡀᚓࡽࢀࡿࡲ࡛ಖ␃࡜ࡋࡓ࠸ࠋᪧᓥ㒊࡛᪥୰࡟ࣂࢵࢱ┠ࡢ㬆ࡁኌࡀ⪺࠿ࢀࠊ࣍ࢩࢧࢧ࢟ࣜ Conocephalus maculatus ࡢྍ⬟ᛶࡀ㧗࠸࡜⪃࠼ࡽࢀࡓࡀ☜ㄆࡣ࡛ࡁ࡞࠿ࡗࡓࠋ࢟ࣥࣂ࢚ᒓࡢ୍✀ࡣ༡す὾࡛ᩘ㢌┠ᧁࡋࠊᘅ⏣඘Ặ࡟ࡼࡾ᧜ᙳࡶࡉࢀࡓࠋయⰍ➼࠿ࡽࣄࣟࢬ࢟ࣥࣂ࢚ Licilia sericata ࡢྍ⬟ᛶࡀ㧗࠸ࡀ☜ᐃࡣᚅࡕࡓ࠸ࠋ࣡ࣛࢪ࣒ࢩள┠ࡣすஅ὾ࡢᾏᓊ௜㏆ࡢ♟୰࡛ 1 ಶయࡢࡳ┠ᧁࡉࢀࡓࠋ
௨ୗ࡟≉➹ࡍ࡭ࡁ✀࡟ࡘ࠸࡚グ㍕ࡋࡓࠋ
࣭ࢭࢺࢩ࣑ Ephysteris promptella ᑠ➟ཎㅖᓥ᪂グ㘓 ໭すྎᆅࡢ⁐ᒾྎᆅୖ࡛ 1 ಶయࡀ᥇㞟ࡉࢀࡓࠋᮏ✀ࡣᾏᓊἢ࠸ࡢ᩿ᓴࡢᒾ✰୰࠿ࡽぢ࠸ࡔࡉࢀࡿ✀࡛ࠊࡇࢀࡲ࡛࡟࿴ḷᒣ┴ⓑ὾ࠊ⏨ዪ⩌ᓥࠊఀ㇋㫽ᓥ࠿ࡽ▱ࡽࢀ࡚࠸ࡓ㸦⏫⏣ࠊ2015㸧ࠋᑠ➟ཎㅖᓥ࠿ࡽࡣึࡵ࡚ࡢグ㘓࡜࡞ࡿࠋ࣭ࢩ࣐ࢡࣟࢫࢪࢥ࢟ࣂ࢞㸦࿴ྡ᪂⛠㸧Ephysteris promptella ᪥ᮏ᪂グ㘓 ᮏ✀ࡢᗂ⹸ࡢ㣗㣵᳜≀ࡣ࢖ࢿ⛉ⲡᮏ࡛࠶ࡾࠊࢫ࢘࢕࣮ࣆࣥࢢࠊࣛ࢖ࢺࢺࣛࢵࣉࠊࣃࣥࢺࣛࢵࣉࠊ⢓╔ࢺࣛࢵࣉ࡛ከᩘࡢಶయࡀ᥇㞟ࡉࢀ࡚࠸ࡿࡇ࡜࠿ࡽࠊྠᓥ࡟ᐃ╔ࡋ࡚࠸ࡿࡶࡢ࡜⪃࠼ࡽࢀࡿࠋᄇⅆ௨๓࠿ࡽ⏕ᜥࡋ࡚࠸ࡓྍ⬟ᛶࡀ㧗࠸ࡀࠊࡇࢀࡲ࡛ࡢㄪᰝ࡛ࡣぢⴠ࡜ࡉࢀグ㘓࡟⮳ࡽ࡞࠿ࡗࡓࡶࡢ࡜⪃࠼ࡽࢀࡿࠋᑠ➟ཎㅖᓥ࡛ࡣᑠ⻍㢮┦ࡢゎ᫂ᗘࡣప࠸ࡓࡵࠊ௚ᓥ࡟ศᕸࡋ࡞࠸࠿࡝࠺࠿ࡣ⌧᫬Ⅼ࡛ࡣ୙࡛᫂࠶ࡿࠋ
࣭ࢡࢳࣅࣝ࢝ࢬ࢟ࢲࢽ Carios capensis ᾏ㫽࡟௜╔ࡋ࡚྾⾑ࡍࡿࠋ࢝ࢶ࢜ࢻࣜ Sula leucogaster ࡸ࢔࢜ࢶࣛ࢝ࢶ࢜ࢻࣜ Su.
dactylatra ࡀఇᜥࡍࡿᒾ▼ࡢ⿬࡟ࡣ 50̺100 㢌ࡶࡢಶయࡀ₯ࢇ࡛࠸ࡓࠋᪧᓥ㒊࡛㧗ᐦᗘ࡛࠶ࡗࡓࡀࠊ໭すྎᆅ࡛ࡶᾏ㫽ࡢႠᕢᆅⅬࡲࡓࡣఇᜥᆅⅬࡢᒾ▼ࡢୗ࡞࡝࡟ࡣᮏ
✀ࡀ☜ㄆࡉࢀࡓࠋᮏ✀ࡣே⋇ඹ㏻ឤᰁ⑕ࡢ⑓ཎయ࡛࠶ࡿ࣎ࣞࣜ࢔ Borrelia ࡸࣜࢣࢵ− 99 −ࢳ࢔ Rickettsia ➼⑓ཎయࢆఏᦙࡍࡿࡇ࡜ࡀ☜ㄆࡉࢀ࡚࠾ࡾ㸦Reeves et al., 2006㸧ࠊすஅᓥ࡟࠾࠸࡚ࡶὀពࢆせࡍࡿࠋ➹⪅㸦᳃㸧ࡣୖ㝣ㄪᰝᚋ࡟⮬㌟ࡢ⓶⭵ୖ࡟ 6 ࠿ᡤ௨ୖࡢ྾⾑⑞ࢆ☜ㄆࡋࡓࡀࠊⓎ⇕➼ࡢ⑕≧ࡣ⌧ࢀ࡞࠿ࡗࡓࠋ
㸱㸫㸰㸬⠇㊊ື≀ࡢศᕸᣑ኱すஅᓥᓥෆ࡛ࡶᆅᇦ࡟ࡼࡗ࡚⠇㊊ື≀ࡢศᕸ≧ἣࡣ኱ࡁࡃ␗࡞ࡿࠋ2013 ᖺᄇⅆ๓ࡼࡾṧᏑࡋ࡚࠸ࡿ㝣ᆅ࡛࠶ࡿᪧᓥ㒊࡛ࡣ 28 ✀ࡀ☜ㄆࡉࢀࡓ㸦⾲ 1A㸧ࠋ࢜࢞ࢧ࣡ࣛ
ࢡࣅ࢟ࣜࢠࢫ Euconocephalus nasutusࠊࣄ࣓ࣚࢥࣂ࢖ள⛉ࡢ୍✀ࠊࢡࢲ࢔ࢨ࣑࣐࢘⛉ࡢ୍✀ࠊࢡࢧࢩࣟ࢟ࣚࢺ࢘ Mythimna loreyi ➼ࠊ᳜㣗ᛶࡲࡓࡣ྾Ồᛶࡢ᪻⹸ࡣࠊ࢜ࣄ
ࢩࣂ Eleusine indicaࠊ࢖ࢾࣅ࢚ Echinochloa crus-galliࠊࢫ࣋ࣜࣄࣘ Portulaca oleraceaࡢ᳜⏕ࡀṧᏑࡍࡿࡇࡢᆅᇦ࡟౫Ꮡࡍࡿࠋࡲࡓࠊࣁࢲ࢝࢔ࣜ Cardiocondyla kagutsuchiࡣᪧᓥࡢⲡᮏ⩌ⴠࡢࢫ࢖࣮ࣆࣥࢢ࡛ᩘⓒ㢌☜ㄆࡉࢀࠊࢫ࣋ࣜࣄ࡛ࣘ྾⻤ࡋ࡚࠸ࡿᵝᏊࡶほᐹࡉࢀࡓ㸦ᅗ 2㸧ࠋᮏ✀ࡶᪧᓥ㒊࡛ࡢࡳ☜ㄆࡉࢀࡓࡇ࡜࠿ࡽࠊすஅᓥ࡟࠾࠸࡚ࡣ᳜⏕࡬ࡢ౫Ꮡᗘࡀ㧗࠸ྍ⬟ᛶࡀ࠶ࡿࠋᪧᓥ㒊ୗࡢᾏ὾㒊࡛࠶ࡿすஅ὾࡛ࡣ 6 ✀ࡢ⏕ᜥࡀ☜ㄆࡉࢀࡓ㸦⾲ 1C㸧ࠋ⢓╔ࢺࣛࢵࣉࡢ⤖ᯝࢆᪧᓥ࡜ẚ㍑ࡍࡿ࡜ᤕ⋓ࡉࢀࡓಶయᩘࡢ⥲㔞ࡣྠ⛬ᗘ࡛࠶ࡿࡀࠊ✀ᩘ࡛ࡣ༙ᩘᮍ‶࡛࠶ࡿ㸦⾲ 2㸧ࠋࡇࡢᆅᇦ࡟ࡣ≉࡟ࣖࢽ࢖ࣟࣁࢧ࣑࣒ࢩ Anisolabis picea ࡀඃ༨ࡋ࡚࠾ࡾࠊ2013 ᖺᄇⅆᚋ࡟ᙧᡂࡉࢀࡓ᪂ࡋ࠸ᾏ὾㒊࡟㐍ฟࡋࡓศゎ⪅࡜ࡋ࡚㔜せ࡞ᙺ๭ࢆᯝࡓࡋ࡚࠸ࡿ࡜⪃࠼ࡽࢀࡿࠋ2016 ᖺࡢୖ㝣ㄪᰝ࡛ࡶࠊすஅ὾ࡢᪧᓥ࠿ࡽ
⣙ 200m 㞳ࢀࡓᆅⅬ࡛ࣁࢧ࣑࣒ࢩࡀ☜ㄆࡉࢀࡓࠋࡲࡓࠊ໭すྎᆅ࡟࠾࠸࡚ࡶ 6 ✀ࡀ☜ㄆࡉࢀࡓ㸦⾲ 1B㸧ࠋᪧᓥ㒊࡜᥋⥆ࡍࡿࡇࢀࡽࡢᆅᇦ࡛ࡣࣖࢽ࢖ࣟࣁࢧ࣑࣒ࢩࡸ࢜
࢞ࢧ࣡ࣛࢥࣔࣜࢢࣔ Lycosa boninensis ࡞࡝୺࡟Ṍ⾜࡟ࡼࡾศᩓࡍࡿ࡜⪃࠼ࡽࢀࡿ✀ࡶ㐍ฟࡋ࡚࠸ࡓࠋ㸲㸫㸱࡟࠾࠸࡚ヲ㏙ࡍࡿࡀࠊࡇࡢᆅᇦ࡟ࡣ᳜⏕ࡀ࡞࠸࡟ࡶ࠿࠿ࢃ
ࡽࡎᾏ㫽ࡢᒈ㧁ୗ࡟࠾࠸࡚ࢺࣅ࣒ࢩ㢮ࠊࢧࢧࣛࢲࢽ㢮ࡀ☜ㄆࡉࢀࡓࠋ
2017 ᖺᄇⅆᚋ࡟᪂ࡓ࡟ᙧᡂࡉࢀࡓ༡す὾ࡢࢺࣛࢵࣉ࡛ࡣ⠇㊊ື≀ࡀ☜ㄆࡉࢀࡎ㸦⾲ 2, ⾲ 3㸧ࠊ௵ព᥇㞟࡟ࡼࡾ☜ㄆࡉࢀࡓࢺࣅ࢝ࢶ࢜ࣈࢩ࣒ࢩ Dermestes aterࠊࢡࣟࣂ࢚⛉ࡢ୍✀ࡀ☜ㄆࡉࢀࡓࡢࡳ࡛࠶ࡗࡓ㸦⾲ 1D㸧ࠋࡓࡔࡋࠊすஅ὾ᆅᇦࡢࢺࣛࢵࣉࡣኪ㛫ࢆྵࡳ 16̺24 ᫬㛫タ⨨ࡋࡓࡢ࡟ᑐࡋࠊ༡す὾࡛ࡣ 10:00̺15:00 ࡢ㛫ࡢ 4 ᫬㛫⛬ᗘ࡛࠶ࡗࡓࡇ࡜࡟ࡣὀពࢆせࡍࡿࠋ᪥୰ࡣ≉࡟Ẽ ࠊᆅ ࡜ࡶ࡟㧗ࡃ࡞ࡾࠊ⠇㊊ື≀ࡢάື࡟ࡣ୙㐺࡛࠶ࡗࡓྍ⬟ᛶࡀ࠶ࡿࠋࣛ࢖ࢺࢺࣛࢵࣉ࡟ࡘ࠸࡚ࡣᪧᓥ㒊࡛ࡢᐇ᪋࡟࡜࡝ࡲࡾࠊᐃ㔞ⓗ࡞⤖ᯝࢆᚓࡿࡇ࡜ࡀᅔ㞴࡛࠶ࡗࡓࡇ࡜࠿ࡽࠊ☜ㄆࡉࢀࡓ✀࡟ࡘ࠸࡚ࣜࢫࢺ࡟グ㘓ࡍࡿࡢࡳ࡜ࡋࡓࠋࡋ࠿ࡋࠊኪ㛫࡟ࡢࡳάືࢆ☜ㄆࡋࡓ✀ࡶ࠶ࡾࠊኪ㛫ㄪᰝࢆᐇ᪋ࡋࡓࡇ࡜ࡣ㔜せ࡛࠶ࡗࡓࠋ௒ᚋࡢࣔࢽࢱࣜࣥࢢㄪᰝࡢࡓࡵ࡟ࡣ UAV ࡟ࡼࡿࢺࣛࢵࣉࡢ㐠ᦙタ⨨➼ࠊㄪᰝ᪉ἲࢆᨵⰋࡋࠊ」ᩘᅇࡢୖ㝣ࡀ࡛ࡁ࡞࠸ሙྜࠊࡲࡓࡣ 1 ᗘࡶୖ㝣࡛ࡁ࡞࠸ሙྜ࡛ࡶࠊྛㄪᰝᆅⅬ࡟࠾࠸࡚ྠ⛬ᗘࡢᐃ㔞ㄪᰝࡀᐇ᪋࡛ࡁࡿࡼ࠺࡟ࡍࡿࡇ࡜ࡀᚲせ࡛࠶ࡿࠋ− 100 −⾲ 1㸬すஅᓥ࡛グ㘓ࡉࢀࡓ㝣ୖ⠇㊊ື≀ࡢ✀ࣜࢫࢺ
Table 1㸬Species list of the terrestrial arthropods found on Nishinoshima Island
1983 2004 2012 2016 2018
*1
*2
*3
*4
*42019໪Ռָ໌࿪໌

OrderFamily

Scientific name

Japanese nameφϑϞε໪ςοφϑϞεՌIsotomidae Gen. sp.

ςοφϑϞεՌ͹Ҳझ˖ ˖ΠϢφϑϞεՌ

Entomobryidae Gen. sp.

ΠϢφϑϞεՌ͹Ҳझ˖φϱϚ໪εϝՌφϱϚՌHeterolepisma dispar
Pantala flavescensιφεϝΤηώΫφϱϚβΫϔϨ໪ώρν໪βΫϔϨՌΫϨάϨηՌ

Periplaneta americana
Conocephalus maculatus ?

ϭϠϱβΫϔϨϙεγγΫϨ"ΫϨάϨηՌώρνՌEuconocephalus nasutus
Locusta migratoriaΨΪγϭϧέϑΫϨάη
φόγϜώρνύγϝϞεՌ
ύγϝϞεՌ

Anisolabis picea
Euborellia annulipesϢω΢ϫύγϝϞε
αϐΰζϫύγϝϞε

ΠδϝΤϜ໪

έξΠδϝΤϜՌPhlaeothripidae Gen. sp.

έξΠδϝΤϜՌ͹Ҳझ

ΩϟϞε໪

ΤϱΩՌ
Ϧαώ΢Ռ

Toya propinqua
Typhlocybinae Gen. sp.

εϫΤθΤϱΩ
ϐϟϦαώ΢ѧՌ͹ҲझςοΩϟϞεՌΩηϝΩϟϞεՌ

Geocoris pygmaeus
Creontiades brevisϐϟςοΩϟϞε
ϐϟϓνϙεΩηϝΩϟ

ϜΫώγεΪϟՌψΪΩϟϞεՌNabis kinbergii
Nysius caledoniaeϋρν΢ϜΫώγεΪϟ
ΨΪγϭϧϐϟψΪΩϟϞε

ߗம໪ΩςΨϔεϞεՌ

Dermestes aterφϑΩςΨϔεϞε

ύο໪τϱφΤϞεՌΠϨՌScymnus nigrosuturalis
Cardiocondyla kagutsuchiέϫηζϐϟτϱφΤ
ύξΩΠϨ

ΠϨՌ
ΠϨՌ

Pheidole noda
Tetramorium bicarinatumΨΨθΠϨΨΨεϭΠϨ

ΠϨՌεϧϝώΦՌ

Hypoponera punctatissima
Hippoboscidae Gen. sp.

φϑωιύϨΠϨεϧϝώΦՌ͹Ҳझ

έϫώΦՌ
ωέώΦՌ

Lycilia sp.
Sarcophagidae Gen. sp.

ΫϱώΦ଒͹ҲझωέώΦՌ͹Ҳझ΢ΦώΦՌMuscidae Gen. sp.

΢ΦώΦՌ͹ҲझΫόαώΦՌ
ΫώΪՌ

Mycetophilidae Gen. sp.
Ephysteris promptellaΫόαώΦՌ͹ҲझεϜέϫηζαΫώΪ

ςφΪՌ
ϟ΢ΪՌ

Spoladeare curvalis
Faveria leucophaeellaεϫΨϑόϟ΢Ϊ
αενζϫέϫϜξϧϟ΢Ϊ

˕ντύοϥΤՌεϡέΪՌ

Vanessa indica
Perixera obrinariaΠΩντύέϫτϱΤηοϡϐϟεϡέ

˕

ηθϟΪՌ
ϢΪՌ

Agrius convolvuliΦϑΪϧηθϟ
έγεϫΫϦφΤ

εϝ໪ύγϝϞε໪

ύΦ໪

οϥΤ໪

έϠ໪

ξω໪

ϭϧζϞε໪

ϢΪՌMythimna loreyi
Remigia frugalisϢϜεϫήϠՌαΪϋήϠՌ

Scytodes sp.
Neoscona theisiϢϜεϫήϠ଒͹ҲझϙεηζΨωήϠ

αϠϨήϠՌ

Lycosa boninensis
Arachnida Fam. Gen. sp.

ΨΪγϭϧαϠϨήϠέϠ໪͹ҲझϐϟξωՌ

Carios capensis
Oribatida Fam. Gen. sp.

έοϑϩΩθΫξωγγϧξω͹Ҳझ

Mesostigmata Fam. Gen. sp.

φΰξωྪ͹ҲझOniscidea Fam. Gen. sp.

ϭϧζϞεѧ໪͹Ҳझ߻‫ܯ‬झ਼

˕

˕
˕

˕nn
˖
˖

˕n

˖
˖n

˖

n

˕
?

˕˕?

˖ ˖˖

˕˕?
˕˖n

˖
˖n

˕

˖
˖˕
˕

˖
˖n

˖ ˖

˖

˖
˖

nn

˖
˖nn

˕
˕?

˖ n?
˕˖
˖

˖

nn

˕
˖n?
˕?

?

˕ΤηΨϑέοώ

number of species

A B C D

˖
˖n

˕

˖ ˖ ˖
˖n

˕

˖ ˖˖ ˖n˕˕?

?

˖4810104n
˖n
28 6 6 22133

ʁ୉ୖʀ૖ీ   ʁ$EH   ʁ౨‫౐ښ‬ঘ‫ࢩݬ־‬ுౖ໨՟ࣙષޮԄ‫   ܐ‬ʁຌๅࠄ͗ॵड़

2019 ᖺㄪᰝ⤖ᯝࡣ A㸸ᪧᓥࠊB㸸໭すྎᆅࠊC㸸すஅ὾ࠊD㸸༡す὾࡟ศࡅ࡚♧ࡋࠊすஅᓥ᪂グ㘓✀ࡣࠕn࡛ࠖ♧ࡋࡓࠋ㐣ཤࡢㄪᰝグ㘓ࡶేࡏ࡚♧ࡋࡓࠋ㐣ཤࡢグ㘓࡛✀ྠᐃ➼ࠊ㆑ูࡀ୙༑ศ࡛࠶ࡗࡓࡶࡢࡣࠕ?࡛ࠖ♧ࡋࡓࠋThe 2019 survey results are shown separately for A: Remnant of former island, B: Northwest
plateau, C: West beach, D: Southwest beach. The new records for Nishinoshima Island are
denoted by "n". The results of previous surveys are included in this list. In the past records,
species for which identification was insufficient were indicated by "?".

− 101 −ᅗ  ㄪᰝ࡟ࡼࡗ࡚グ㘓ࡉࢀࡓ୺࡞㝣ୖ⠇㊊ື≀)LJXUH1RWDEOHWHUUHVWULDODUWKURSRGVSHFLHVUHFRUGHGLQWKHVXUYH\VLQ1LVKLQRVKLPD,VODQG− 102 −ᅗ 2.㸦๓㡫㸧a.ࢭࢺࢩ࣑ࠊb. ࢘ࢫࣂ࢟ࢺࣥ࣎ࠊ c. ࢜࢞ࢧ࣡ࣛࢡࣅ࢟ࣜࢠࢫࠊd. ࣡ࣔࣥࢦ࢟ࣈࣜࠊe. ࣖࢽ࢖ࣟࣁࢧ࣑࣒ࢩࠊf. ࢿࢵࢱ࢖࣐࢟ࣂࢧࢩ࣓࢞ࠊg. ࢜࢞ࢧ࣡ࣛࣄ࣓ࢼ࣓࣒࢞࢝ࢩࠊh. ࢩࣟ࢘ࢬ࢘ࣥ࢝ࠊi. ࣄ࣓ࣇࢱ࣍ࢩ࢝ࢫ࣑࣓࢝ࠊj. ࢡࣟࢫࢪࣄ
࣓ࢸࣥࢺ࢘ࠊk. ࢺࣅࢽࢭࣁࣜ࢔ࣜࠊl. ࣄ࣓ࢶࢳ࣓࣒࢝ࢩࠊm. ࢥࣄࢤࢪࣟࣁࢧ࣑࣒ࢩࠊn. ࢡࢲ࢔ࢨ࣑࣐࢘⛉ࡢ 1 ✀ࠊo. ࢺࣅ࢝ࢶ࢜ࣈࢩ࣒ࢩࠊp. ࢩ࣑ࣛࣂ࢚⛉ࡢ 1 ✀ࠊq. ࢟ࣥࣂ࢚ᒓࡢ 1 ✀ࠊr. ࣁࢲ࢝࢔ࣜࠊs. ࢡࢧࢩࣟ࢟ࣚࢺ࢘ࠊt. ࢩ࣐ࢡࣟࢫࢪࢥ࢟ࣂ
࢞ࠊu. ࢜࢞ࢧ࣡ࣛࢥࣔࣜࢢࣔࠊv. ࢡࢳࣅࣝ࢝ࢬ࢟ࢲࢽࠊw. ࢧࢧࣛࢲࢽࡢ 1 ✀ࠋྛᶆᮏ࡟ἢ࠺㯮⥺ࡣ 5mm ࢆ⾲ࡋ࡚࠸ࡿࠋ㸦q ࡣᘅ⏣඘᧜ᙳ㸧
Figure 2. (Previous page) a. Heterolepisma dispar, b. Pantala flavescens, c. Euconocephalus
nasutus, d. Periplaneta americana, e. Anisolabis picea, f. Nabis kinbergii, g. Nysius
caledoniae,Creontiades brevis, h. Toya propinqua, i. Creontiades brevis j. Scymnus
nigrosuturalis, k. Hypoponera punctatissima, l.Geocoris pygmaeus, m. Euborellia annulipes,
n. Phlaeothripidae Gen. sp., o. Dermestes ater, p. Hippoboscidae Gen. sp., q. Lucilia sp.
(photographed by Mitsuru Hirota), r. Cardiocondyla kagutsuchi, s. Mythimna loreyi, t.
Ephysteris promptella, u. Lycosa boninensis, v. Carios capensis, w. Oribatida Fam. Gen. sp.
Solid bar beside each individual indicates 5mm.

⾲ 2㸬⢓╔ࢺࣛࢵࣉ࡛☜ㄆࡉࢀࡓすஅᓥࡢ㝣ୖ⠇㊊ື≀ࡢᖹᆒಶయᩘ
Table 2㸬Terrestrial arthropods in Nishinoshima Island detected by sticky traps
࿪໌Japanese nameָ໌
Scientific name‫ڈ‬ౣୈஏϢω΢ϫύγϝϞε

Anisolabis piceaαϐΰζϫύγϝϞε

੤೯ශ

ೈ੤ශ

n=20n=8n=200

2.630

Euborellia annulipes

0.1000εϫΤθΤϱΩ

Toya propinqua

0.0500ϐϟϦαώ΢ѧՌ͹ҲझTyphlocybinae Gen. sp.

0.1500ΨΪγϭϧϐϟψΪΩϟϞε

Nysius caledoniae

0.1000ύξΩΠϨ

Cardiocondyla kagutsuchi

1.8500ΫόαώΦՌ͹Ҳझ

Mycetophilidae Gen. sp.

0.10

0.130εϜέϫηζαΫώΪ

Ephysteris promptella

0.3500ΨΪγϭϧαϠϨήϠ

Lycosa boninensis

0.2500έοϑϩΩθΫξω

Carios capensis

0.1500ΨΨΩέϪ΢ϭΪω

Geograpsus crinipes

0.05

0.250ྛ✀ࡢ 1 ࢺࣛࢵࣉᙜࡓࡾᖹᆒグ㘓ಶయᩘࢆ♧ࡋࡓࠋThe average number of individuals of each species per trap was shown.

− 103 −⾲ 3㸬ࣃࣥࢺࣛࢵࣉ࡛☜ㄆࡉࢀࡓすஅᓥࡢ㝣ୖ⠇㊊ື≀Table 3㸬Terrestrial arthropods in Nishinoshima Island detected by pan traps‫ڈ‬ౣୈஏ

ೈ੤ශ

n=10

n=10

Typhlocybinae Gen. sp.

1.90ΨΪγϭϧϐϟψΪΩϟϞε

Nysius caledoniae

0.10έϫηζϐϟτϱφΤ

Scymnus nigrosuturalis

0.10

ύξΩΠϨ

Cardiocondyla kagutsuchi

1.20εϜέϫηζαΫώΪ

Ephysteris promptella

1.80έοϑϩΩθΫξω

Carios capensis

0.60

࿪໌
Japanese nameָ໌
Scientific nameϐϟϦαώ΢ѧՌ͹Ҳझྛ✀ࡢ 1 ࢺࣛࢵࣉ࠶ࡓࡾᖹᆒグ㘓ಶయᩘࢆ♧ࡋࡓࠋThe average number of individuals of each species per trap was shown.
㸲㸬⪃ᐹ㸲㸫㸯㸬⛣ධ࡜⤯⁛ᄇⅆ๓ࡢ 2012 ᖺ࡟☜ㄆࡉࢀࡓ 10 ✀ࡢ⠇㊊ື≀㸦ᮾி㒔ᑠ➟ཎᨭᗇᅵᮌㄢ⮬↛බᅬಀࠊ2013㸧ࡢ࠺ࡕࠊ7 ✀ࡢ⏕ᜥࡀ☜ㄆ࡛ࡁ࡞࠿ࡗࡓࠋ≉࡟ࠊࢺࣀࢧ࣐ࣂࢵࢱ Locusta
migratoriaࠊ࢚ࣅ࢞ࣛࢫࢬ࣓ Agrius convolvuliࠊ࢜࢜ࢩ࣡࢔ࣜ Tetramorium bicarinatumࠊ࣍ࢩࢫࢪ࢜ࢽࢢࣔ Neoscona theisi ࡢࡼ࠺࡟ࠊయࢧ࢖ࢬࡀ኱ࡁ࠸࠿ࠊ⏕ᜥᩘࡀከࡃࠊ
ᐜ᫆࡟☜ㄆ࡛ࡁࡿࡣࡎࡢ✀ࡀ☜ㄆࡉࢀ࡞࠿ࡗࡓࡇ࡜࠿ࡽࠊࡇࢀࡽࡢ✀ࡣ 2013 ᖺ௨㝆ࡢᄇⅆࡢᙳ㡪࡟ࡼࡾಶయ⩌ࡀ⤯⁛ࡋࡓྍ⬟ᛶࡀ⪃࠼ࡽࢀࡿࠋ≉࡟࢚ࣅ࢞ࣛࢫࢬ࣓ࡣ㣗ⲡ࡛࠶ࡿࢢࣥࣂ࢖ࣄࣝ࢞࢜ࡀᾘኻࡋࡓࡇ࡜࠿ࡽࠊᮏᓥ࡛ࡢ⦾Ṫࡣ࡛ࡁ࡞࠸ࡇ࡜ࡀ☜ᐇ࡛࠶ࡿࠋ୍᪉࡛ࠊ௒ᅇࡢㄪᰝ࡛ࡣࡇࢀࡲ࡛࡟グ㘓ࡉࢀ࡞࠿ࡗࡓࣁࢲ࢝࢔ࣜࠊ
࢜࢞ࢧ࣡ࣛࢡࣅ࢟ࣜࢠࢫ Euconocephalus nasutus ࡀᪧᓥ㒊ࡢࢫ࢘࢕࣮ࣆࣥࢢ࡟ࡼࡾ
☜ㄆࡉࢀࡓࠋ2016 ᖺࡢࢫ࢘࢕࣮ࣆࣥࢢㄪᰝ᫬࡟ࡣ☜ㄆࡉࢀ࡚࠸࡞࠸ࡇ࡜࠿ࡽࠊᑡ࡞
ࡃ࡜ࡶ 2016 ᖺ࡟ࡣඃ༨ࡋ࡚࠸࡞࠿ࡗࡓࡶࡢ࡜⪃࠼ࡽࢀࡿࠋ≉࡟ࣁࢲ࢝࢔ࣜࡣࠊ௒ᅇ
ከᩘࡢಶయࡀほᐹࡉࢀࠊᄇⅆᚋ࡟୙ᅾ࡜࡞ࡗࡓ࢜࢜ࢩ࣡࢔ࣜࡢ⏕ែⓗᆅ఩࡟⨨ࡁ᥮ࢃࡾࠊಶయᩘࢆቑຍࡉࡏࡓྍ⬟ᛶࡀ⪃࠼ࡽࢀࡿࠋ
࢘ࢫࣂ࢟ࢺࣥ࣎ Pantala flavescens ࡣỈᇦࡀ࡞࠸ࡓࡵᐃ╔࡛ࡁ࡞࠸ࡀࠊ௒ᅇࡢࡳ࡞ࡽࡎࠊ㐣ཤࡢㄪᰝ࡟࠾࠸࡚ࡶࡓࡧࡓࡧ㣕᮶ࡀ☜ㄆࡉࢀ࡚࠾ࡾࠊ⮬ຊ࡛ᓥ࡟㣕᮶ࡋࡓࡶࡢ࡜⪃࠼ࡽࢀࡿࠋ༡◲㯤ᓥ࡟࠾࠸࡚ࡣ 2007 ᖺ࡟☜ㄆࡉࢀ࡞࠿ࡗࡓ࢚ࣅ࢞ࣛࢫࢬ࣓➼ࡢ⦾Ṫࡀ᫂ࡽ࠿࡜࡞ࡗ࡚࠾ࡾࠊࡇࢀࡽࡣ㏆ᖺᐃ╔ࡋࡓࡶࡢ࡜⪃࠼ࡽࢀࡿ㸦᳃࡯࠿ࠊ2018㸧ࠋኴᖹὒୖ࡛ࡣᵝࠎ࡞᪻⹸ࡀグ㘓ࡉࢀ࡚࠾ࡾ㸦ᮅẚዉ࣭㭯ᒸࠊ1970㸧ࠊ᪻⹸㢮ࡣ㢼࡟㐠ࡤࢀ࡚฿㐩ࡍࡿࡶࡢࡶྵࡵࠊすஅᓥ࡬ࡶࡓࡧࡓࡧ㣕᮶ࡋ࡚࠸ࡿྍ⬟ᛶࡀ࠶ࡿࠋ⌧≧࡛ࡣỈᇦࡸ≉ᐃࡢ᳜≀ࡀ⦾Ṫࡢᚲ㡲᮲௳࡜࡞ࡿ✀ࡢᐃ╔ࡣ㞴ࡋ࠸ࡀࠊ࢖ࢿ⛉ⲡᮏࢆ㣗㣵࡜ࡍࡿ࢞㢮ࠊ࣓࣒࢝ࢩ࣭࣭࢘ࣥ࢝ࣚࢥࣂ࢖㢮➼ࡣ௒ᚋࡶᐃ╔ࡍࡿ✀ࡀቑຍࡍࡿྍ⬟ᛶࡀ࠶ࡿࠋࡲࡓࠊ࢔ࣜ㢮ࡸࣁࢧ࣑࣒ࢩ㢮ࡢࡼ࠺࡟㫽㢮ࡢᒈ㧁ࡸ⁻╔ࡍࡿ㨶㢮࡞࡝ࢆ㣗㣵࡜ࡍࡿ㞧㣗ᛶࡢ✀࡛࠶ࢀࡤࠊ᳜⏕ࡢ᭷↓࡟㝈ࡽࡎᐃ╔ࡢྍ⬟− 104 −ᛶࡀ࠶ࡿࠋࡓࡔࡋࠊ࢔ࣜ㢮࡛ࡣ 1983 ᖺ࡟ࡣ࢜࢜ࢬ࢔ࣜ Pheidole nodaࠊ2004 ᖺࠊ2012ᖺ࡟ࡣ࢜࢜ࢩ࣡࢔ࣜࠊ௒ᅇ㸦2019 ᖺ㸧ࡢㄪᰝ࡛ࡣࣁࢲ࢝࢔ࣜ࡜ࠊẖᅇࡢࡼ࠺࡟グ㘓✀ࡀ␗࡞ࡗ࡚࠸ࡿࠋ⌧ᅾࡢすஅᓥ࡟࠾࠸࡚ྠ᫬࡟ᐃ╔ྍ⬟࡞✀ᩘࡣከࡃ࡞ࡃࠊᄇⅆ࡟క࠺⎔ቃࡢኚ໬࡟ᛂࡌ࡚㢖⦾࡟✀ࡀධࢀ᭰ࢃࡿྍ⬟ᛶࡀ⪃࠼ࡽࢀࡿࠋ㸲㸫㸰㸬ᄇⅆ┤ᚋࡢᾏὒᓥ࡟࠾ࡅࡿศゎ⪅ࡢ㐍ฟከࡃࡢ⏕ែ⣔࡛ࡣື≀㑇యࡢศゎ࡟ࡣࣁ࢚㢮ࡢᗂ⹸ࡀ㔜せ࡞ᙺ๭ࢆᯝࡓࡍࠋᑠ➟ཎㅖᓥ࡛ࡶ༡◲㯤ᓥࡢࡼ࠺࡟ẚ㍑ⓗ᪂ࡋ࠸ᓥ࡛↓ᩘࡢࣁ࢚ࡀᾏ㫽ࡢྤࡁᡠࡋ࡞࡝࡟⩌ࡀࡗ࡚࠸ࡓࡇ࡜ࡀほᐹࡉࢀ࡚࠾ࡾࠊศゎ⪅ࡢከᵝᛶࡀప࠸≧ែ࡟࠾ࡅࡿࣁ࢚㢮ࡢ㔜せᛶࡀ♧၀ࡉࢀ࡚࠸ࡓ㸦᳃࡯࠿ࠊ2018㸧ࠋࡋ࠿ࡋࠊ௒ᅇࡢすஅᓥࡢㄪᰝ୰࡟ࡣ࡯࡜ࢇ࡝ࣁ࢚ࡢ⏕ᜥࢆ☜ㄆࡍࡿࡇ࡜ࡀ࡛ࡁ࡞࠿ࡗࡓࠋᡂ⹸ࢆࢃࡎ࠿࡟☜ㄆࡋࡓࡢࡳ࡛࠶ࡾࠊື≀Ṛయ୰࡟ࣁ࢚ࡢᗂ⹸ࢆ☜ㄆࡍࡿࡇ࡜ࡣ࡞࠿ࡗࡓࠋ୍᪉࡛ࢺࣅ࢝ࢶ࢜ࣈࢩ࣒ࢩࡸࣖࢽ࢖ࣟࣁࢧ࣑࣒ࢩࡀᩘከࡃ☜ㄆࡉࢀࡓࠋ᳜⏕ࡀஈࡋ࠸ࡇ࡜࡟ࡼࡾ‵ᗘࡀಖࡓࢀࡎࠊ㯮Ⰽࡢ⁐ᒾ࡟ࡼࡾᆅ ࡀ㧗࠸ࡇ࡜࠿ࡽ࠿ࠊ☜ㄆࡉࢀࡿṚయࡢከࡃࡣ஝⇱ࡋ࡚࠾ࡾࠊࣁ࢚㢮ࡢ⦾Ṫ࡟ࡣ㐺ࡉ࡞࠸≧ែ࡛࠶ࡿྍ⬟ᛶࡀ࠶ࡿࠋࡓࡔࡋࠊẼ ࡸᆅࡀపୗࡍࡿ෤ᮇ➼࡟࠾࠸࡚ࡶྠᵝ࡛࠶ࡿ࠿ࠊ☜ㄆࡍࡿᚲせࡣ࠶ࡿࡔࢁ࠺ࠋ
ᙧᡂࡉࢀ࡚ 2 ᖺ࡯࡝࡜࡞ࡿ༡す὾࡛ࡣࠊ㣕⩧ຊࡢ࠶ࡿࢺࣅ࢝ࢶ࢜ࣈࢩ࣒ࢩࡣᒈ㧁ୗ࡟άືࡋ࡚࠸ࡿࡇ࡜ࡀ☜ㄆࡉࢀࡓࡀࠊ㣕⩧࡛ࡁ࡞࠸ࣁࢧ࣑࣒ࢩ㢮ࡣ☜ㄆࡉࢀ࡞࠿ࡗࡓࠋࣖࢽ࢖ࣟࣁࢧ࣑࣒ࢩࡣすஅ὾࡛ከࡃグ㘓ࡉࢀ࡚࠾ࡾࠊṌ⾜࡟ࡼࡗ࡚ྍ⬟࡞⠊ᅖ࡟ࡣ✚ᴟⓗ࡟ศᩓࡍࡿࡶࡢࡢࠊ⁐ᒾྎᆅࢆ㉺࠼࡚᪂ࡓ࡞ᾏ὾ࡲ࡛฿㐩ࡍࡿࡢࡣᐜ࡛᫆ࡣ࡞࠸ࡇ࡜ࡀ♧၀ࡉࢀࡿࠋ㸲㸫㸱㸬እ᮶⠇㊊ື≀ࡢ⟶⌮እ᮶✀࡛࠶ࡿ࣡ࣔࣥࢦ࢟ࣈࣜ Periplaneta americana ࡀᪧᓥ㒊࡟ṧᏑࡋ࡚࠸ࡿࡇ࡜ࡀ☜ㄆࡉࢀࡓࠋ᪥୰࡟ࡣṚయࢆᩘಶయ☜ㄆࡋࡓࡢࡳ࡛࠶ࡗࡓࡀࠊኪ㛫ㄪᰝ࡛ࡣᾏ㫽ࡀྤࡁᡠࡋࡓ㨶ࡸ㫽ࡢṚయ࡟ከᩘࡢಶయࡀ㞟ࡲࡿᵝᏊࡀほᐹࡉࢀࡓࠋᮏ✀ࡣ 2012 ᖺࡢㄪᰝ㸦ᮾி㒔ᑠ➟ཎᨭᗇᅵᮌㄢ⮬↛බᅬಀࠊ2013㸧࡟ࡼࡾึࡵ࡚☜ㄆࡉࢀ࡚࠾ࡾࠊ2013 ᖺ௨㝆ࡢᗘ㔜࡞ࡿᄇⅆࡢᙳ㡪ࢆཷࡅࡓᪧᓥ࡛⏕ṧࡋ࡚࠸ࡓࡇ࡜࡜࡞ࡿࠋᮏ✀ࡣ
2012 ᖺࡢㄪᰝ࡛ึࡵ࡚☜ㄆࡉࢀࡓࡀࠊ⠇㊊ື≀ࡢᑓ㛛ⓗ࡞ㄪᰝࡣࡇࢀࡲ࡛࡟⾜ࢃࢀ࡚࠸࡞࠿ࡗࡓࡇ࡜࠿ࡽࠊࡼࡾྂ࠸᫬௦ࡢேⅭ࡟ࡼࡿ㠀ពᅗⓗ࡞ᑟධ࡟⏤᮶ࡍࡿࡶࡢ࡛࠶ࡿྍ⬟ᛶࡀ㧗࠸ࠋ࣡ࣔࣥࢦ࢟ࣈࣜࡣ⇕ᖏ࢔ࣇࣜ࢝ࡲࡓࡣ༡࢔ࢪ࢔ཎ⏘࡜⪃࠼ࡽࢀࡿ✀࡛ࠊேⅭⓗ࡟㐠ᦙࡉࢀୡ⏺୰࡟ᐃ╔ࡋࠊ
㸦Von Beeren et al., 2015㸧ࠋᑠ➟ཎㅖᓥࡢྛᓥ࡟ࡶᐃ╔ࡋ࡚࠸ࡿእ᮶✀࡛࠶ࡿࠋすஅᓥࡣࠊேⅭࡀ௓ᅾࡋ࡞࠸⏕ែ⣔ࡢึᮇ㑄⛣ࢆほᐹࡍࡿࡇ࡜ࡀྍ⬟࡞ࠊୡ⏺ⓗ࡟ࡶᴟࡵ࡚㈗㔜࡞ሙᡤ࡛࠶ࡿࠋᮏ✀ࡣ≉࡟⌧ᅾࡢすஅᓥ࡟࠾࠸࡚ࡣ௚ࡢ⠇㊊ື≀࡟ẚ࡭࡚యࢧ࢖ࢬࡀ኱ࡁࡃ⦾Ṫຊࡶ㧗࠸ࡇ࡜࠿ࡽࠊ⏕ែ⣔࡬ࡢᙳ㡪ࡶ኱ࡁ࠸ࡶࡢ࡜᥎ ࡉࢀࡿࠋࡲࡓࠊ⌧ᅾࡣᪧᓥ㒊ࡢࡳ࡟⏕ᜥࡋ࡚࠸ࡿࡶࡢࡢࠊ௒ᚋࡢᾏ㫽ࡢ⏕ᜥᆅࡢᣑ኱࡟కࡗ࡚ศᕸࢆᣑ኱ࡍࡿ࡜⪃࠼ࡽࢀࡿࠋ

− 105 −ேⅭࡢᙳ㡪ࢆཷࡅ࡞࠸ᾏὒᓥ࡟࠾࠸࡚ጞཎࡢ⏕ែ⣔㑄⛣ࢆほᐹࡍࡿ࡜࠸࠺ほⅬ࠿ࡽࡣࠊඃ༨ࡋ࡚౵␎ⓗ࡜࡞ࡾ࠺ࡿእ᮶✀ࡣࠊ౵ධึᮇࡢẁ㝵࡛㜵㝖ࢆ᳨ウࡍ࡭ࡁ࡛࠶ࢁ࠺ࠋࡑࡢࡓࡵ࡟ࡣ࣡ࣔࣥࢦ࢟ࣈࣜࡢすஅᓥ࡟࠾ࡅࡿ⏕ᜥࡢ⌧≧ࢆ☜ㄆࡍࡿ࡜࡜ࡶ࡟ࠊ㜵㝖ᐇ᪋࡟ഛ࠼ࠊ௚ࡢ⏕ែ⣔ᵓᡂ✀࡬ࡢᙳ㡪ࡣ᭱ᑠ㝈࡟ࡍࡿࡇ࡜ࡀ࡛ࡁࡿࡼ࠺ࠊᮏ✀࡟≉໬ࡋࡓ㜵㝖ᡭἲࢆ㛤Ⓨࡍࡿᚲせࡀ࠶ࡿࠋࡲࡓࠊேⅭⓗ࡞እ᮶✀࡜࠸࠺
ほⅬ࠿ࡽࡣࠊ௒ᚋࠊ㑇ఏᏊゎᯒࢆ⾜࠺ࡇ࡜࡟ࡼࡗ࡚ࠊ௚✀࡛ࡶ㉳※ᆅࡸᐃ╔ᖺ௦ࡀุ᫂ࡋࠊேⅭ⛣ධࡀᣦ᦬ࡉࢀࡿྍ⬟ᛶࡀ࠶ࡿࡀࠊእ᮶✀ࡢ㜵㝖࡟ࡘ࠸࡚ࡣすஅᓥࡢಖ඲┠ⓗࡸ㜵㝖సᴗࡀ୚࠼ࡿᙳ㡪ࢆ༑ศ࡟᳨ウࡋࡓୖ࡛ᑐ⟇ࢆㅮࡌࡿ࡭ࡁ࡛࠶ࡿࠋ㸲㸫㸲㸬ཎጞ⏕ែ⣔࡟࠾ࡅࡿᅵተື≀ࡢᐃ╔ࢺࣅ࣒ࢩ㢮࡜ࢧࢧࣛࢲࢽ㢮ࡀᮏᓥ࠿ࡽึࡵ࡚☜ㄆࡉࢀࡓࠋࡇࢀࡽᑠᆺࡢ⠇㊊ື≀ࡣ᭷ᶵ≀ࡢศゎ࡜ᅵተࡢ⏕ᡂ࡟㔜せ࡞ᙺ๭ࢆᯝࡓࡍᅵተື≀࡛࠶ࡿࠋࡇࢀࡽࡢ⏕≀⩌ࡣᪧᓥ㒊ศࡢࡳ࡞ࡽࡎࠊ2015 ᖺᄇⅆ࡛ᙧᡂࡉࢀࡓ໭すྎᆅୖ࡛ࡶ☜ㄆࡉࢀࡓࠋࡋ࠿ࡋࠊ2017 ᖺᄇⅆ࡛ᙧᡂࡉࢀࡓ༡す὾ࡸ⁐ᒾྎᆅ࡛ࡣ☜ㄆ࡛ࡁ࡞࠿ࡗࡓࠋ᳜≀ࡀᏑᅾࡋ࡞࠸᪂ࡋ࠸⁐ᒾୖ࡛ࡣࡇ࠺ࡋࡓ⏕≀ࡣ࢝ࢶ࢜ࢻࣜࡢṚయࡢୗ࠿ࡽぢ࠸ࡔࡉࢀࡓࠋᾏ㫽ࡢṚయࡣࣁࢧ࣑࣒ࢩࡸ࢝ࢶ࢜ࣈࢩ࣒ࢩ࡟ᦤ㣗ࡉࢀࠊࡉࡽ࡟ࢺࣅ࣒ࢩࡸࢧࢧࣛࢲࢽ࡟ࡼࡾศゎࡉࢀࡿࡇ࡜࡛ᅵተࡢᙧᡂ࡟㈉⊩ࡍࡿ࡜⪃࠼ࡽࢀࡿࠋࡇࡢࡇ࡜࠿ࡽࠊ᳜≀ࡀ⏕⫱ࡋ࡚࠸࡞࠸᪂ࡋ࠸⁐ᒾୖ࡛ࡶࠊᾏ㫽ࡢṚయࢆඖ࡟ᅵተࡀ⏕ᡂࡉࢀࡣࡌࡵ࡚࠸ࡿྍ⬟ᛶࡀ࠶ࡿࠋᾏ㫽ࡢṚయ࡟⏤᮶ࡍࡿึᮇࡢᅵተᙧᡂࡣࡇࢀࡲ࡛࡟᳨ウࡉࢀࡿࡇ࡜ࡢ࡯࡜ࢇ࡝࡞࠿ࡗࡓ⏕ែᏛⓗ㐣⛬࡛࠶ࡾࠊ୍ḟ㑄⛣ࡢ⌮ゎ࡟࠾࠸࡚᪂ࡓ࡞どᗙࢆᥦ౪ࡍࡿࡶࡢ࡛࠶ࡿࠋ௒ᚋࠊ⥅⥆ⓗ࡟ㄪᰝࡍࡿࡇ࡜࡟ࡼࡾࠊᅵተᙧᡂ࡜᳜≀ࡢ㐍ฟࡢึᮇ㐣⛬ࡀᐇド࡛ࡁࡿࡇ࡜ࡀᮇᚅࡉࢀࡿࠋ㸳㸬ㅰ㎡ ᮏ◊✲ࡣࠊ2019 ᖺㄪᰝࡣ⎔ቃ┬ࡀ୺ദࡋࡓ௧࿴ඖᖺᗘすஅᓥ⥲ྜᏛ⾡ㄪᰝ࡟ࡼࡗ࡚⾜ࢃࢀࡓࠋㄪᰝࢆᐇ᪋ࡍࡿ࡟࠶ࡓࡾࠊ⎔ቃ┬ࠊᯘ㔝ᗇࠊᮾி㒔ࠊᑠ➟ཎᮧࡢ᪉ࠎ࡟ࡣチㄆྍࡸ㐣ཤࡢㄪᰝグ㘓ࡢ☜ㄆ➼࡟࠾࠸࡚༠ຊ࠸ࡓࡔ࠸ࡓࠋୖ㝣ㄪᰝᐇ᪋࡟ᙜࡓࡗ࡚ࡣ㧗ᕊ᫓ኵẶࠊྥဴႹẶࠊᕝཱྀ኱ᮁẶࢆࡣࡌࡵ࡜ࡍࡿ᪉ࠎࡢ༠ຊ࡟ࡼࡾᏳ඲
࡟ㄪᰝࢆᐇ᪋ࡍࡿࡇ࡜ࡀ࡛ࡁࡓࠋࡲࡓࠊ2016 ᖺࡢୖ㝣ㄪᰝࡣᮾி኱Ꮫ኱Ẽᾏὒ◊✲ᡤࡢᏛ⾡◊✲⯪ࠕ᪂㟷୸ࠖ㸦ᾏὒ◊✲㛤Ⓨᶵᵓᡤᒓ, KS-16-16 ⯟ᾏ㸧࡟ࡼࡾࠊ2018 ᖺࡢὒୖㄪᰝࡣ 7 ᭶࡟⎔ቃ┬ㄪᰝࠊ9 ᭶ࡣẼ㇟ᗇࡢᾏὒẼ㇟ほ ⯪ࠕၨ㢼୸ࠖ࡟ࡼࡿẼ㇟ᗇẼ㇟◊✲ᡤࠊᮾி኱Ꮫᆅ㟈◊✲ᡤࡢඹྠㄪᰝ⯟ᾏ࡟㐃ᦠࡍࡿᙧ࡛ᐇ᪋ࡉࢀࡓࠋㄪᰝ⤖ᯝࡢྲྀࡾࡲ࡜ࡵ࡟࠾࠸࡚ࡣ 2016 ᖺㄪᰝࡢ᪻⹸ࡢྠᐃ࡟ࡘ࠸࡚▼ᕝᆒẶ㸦㸦ᰴ㸧⎔ቃ࢔ࢭࢫ࣓ࣥࢺࢭࣥࢱ࣮㸧ࠊᯘṇ⨾Ặ㸦ᮾி㎰ᴗ኱Ꮫ㸧2016 ᖺࠊ2018 ᖺㄪᰝࡢࢡࣔ㢮ࡢྠᐃ࡟ࡘ࠸࡚㡲㯮㐩ᕭẶ㸦៞ᛂ⩏ሿᗂ⛶⯋㸧ࠊ2018 ᖺࠊ2019 ᖺㄪᰝࡢࢲࢽ㢮ࡢྠᐃ࡟ࡘ࠸࡚㧗㔝ឡẶ㸦ᒣཱྀ኱Ꮫ㸧ࠊ2019 ᖺㄪᰝࡢ࢟ࣂ࢞㢮ࡢྠᐃ࡟ࡘ࠸࡚ᆏᕳ

− 106 −⚈ᏕẶ㸦㮵ඣᓥ኱Ꮫ㸧ࠊ࢟ࣥࣂ࢚ᒓࡢྠᐃ࡟ᮧᒣⱱᶞ㸦࢖ࣥ࣋ࣥࢺ࣭ࣜࣜࢧ࣮ࢳ㸧࡟ࡈ༠ຊ࠸ࡓࡔ࠸ࡓࠋࡇࡢሙࢆ೉ࡾ࡚ᚚ♩⏦ࡋୖࡆࡿࠋ㸴㸬ᘬ⏝ᩥ⊩
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OGASAWARA RESEARCHSUMMARY

Terrestrial arthropods of Nishinoshima Island

Hideaki MORI1*, Toshio KISHIMOTO2, Takeshi TERADA3, Hiroshi NAGANO,Haruki KARUBE3 & Kazuto KAWAKAMI4

1. Japan Wildlife Research Center, 3-3-7 Kotobashi, Sumida, Tokyo 130-8606, Japan.
2. Museum of Natural and Environmental History, Shizuoka, 5762 Oya, Suruga, Shizuoka,Shizuoka 422-8017, Japan
3. Kanagawa Prefectural Museum of Natural History, 499 Iryuda, Odawara, Kanagawa 2500031, Japan
4. Forestry and Forest Products Research Institute, 1 Matsunosato, Tsukuba, Ibaraki 305-8687,
Japan* hmori@jwrc.or.jp (author for correspondence)
For the first time in Nishinoshima Island, terrestrial arthropods were surveyed by experts
in September 2019. While some grassland remained, almost all areas were covered with lava
due to repeated eruptions since 2013. Quantitative and qualitative surveys were conducted inparallel to confirm the remaining arthropods on the former island and to clarify the status of
their entry onto the newly formed beach and plateau. Thirty-three terrestrial arthropods of 4classes, 15 orders, and 28 families were identified. Of these, 21 species were recorded fromthe island for the first time. When these new records are added to existing records, it appears
that a total of 44 terrestrial arthropods have been identified from Nishinoshima. The discoveryof soil decomposers, such as Collembola and Oribatida, under a seabird carcass on the newly
formed lava plateau after the 2013 eruption suggests a new hypothesis regarding the processof primary succession. On the other hand, the alien cockroach remains on the former island,
and an investigation into cockroach control is desirable. The results of a quantitative survey
using traps will provide a baseline for continuous monitoring in the future.
Key words
Alien insects, Monitoring, Oceanic island, Primary succession, Soil organism− 108 −