኱ศ኱Ꮫᩍ⫱⚟♴⛉Ꮫ㒊◊✲⣖せ㸦Res. Bull. Fac. Educ.䠃Welf. Sci., Oita Univ.䠅

215㔠㫣†࡟⏕ᜥࡍࡿ࢜࢖࢝࣡㸦Zacco platypus㸧ࡢᙧែⓗ≉ᚩϪ̿⫧‶ᗘ࡜ᡂ⇍㞝ฟ⌧ᩘ̿㧗 ℈ ⚽ ᶞ㸨࣭ ኱ ಴ 㕲 ஓ㸨㸨࠙せ ᪨ࠚ  ᡃࠎࡣࡇࢀࡲ࡛㸪ἨỈὶධࡢࡓࡵᬮ࡞Ỉᇦࡀ࠶ࡿ㔠㫣†࡟⏕ᜥࡍࡿ࢜࢖࢝࣡㸦Zacco platypus㸧ࡀ㸪኱ศ┴ෆࡢ௚ࡢἙᕝ࡟⏕ᜥࡍࡿಶయ࡜␗࡞ࡿ≉ᚩ㸦ᗈࡃ୍ᐃࡢ㫣㝯㉳⥺㛫㝸㸪᪩ᮇࡢᛶᡂ⇍㸪෤Ꮨ࡟࠾ࡅࡿ
⏘༸⾜ື㸧ࢆᣢࡘࡇ࡜ࢆ᫂ࡽ࠿࡟ࡋ࡚ࡁࡓࠋᮏ◊✲ࡣ㸪ࡇࢀࡽࡢ≉ᚩࡀ㧗ࡃᏳᐃࡋࡓỈ⎔ቃ࡛ࡢ⏕⫱࡟ࡼࡗ࡚⏕ࡌࡿࡇ࡜ࢆ☜࠿ࡵࡿࡓࡵ㸪㔠㫣†ὶධ㒊㸦ᖹᆒỈ

30.4Υ㸧࡜௚ࡢἙᕝ㸦ᖹᆒỈ

16.7Υ㸧࡛᥇㞟ࡉࢀࡓಶయࡢ⫧㸱‶ᗘ㸦య㛗㸭య㔜 㸧ࢆ᭶ู࡟ゎᯒࡋ㸪㔠㫣†ࡢὶධ㒊࡜ὶฟ㒊㸦ᖹᆒỈ
20.1Υ㸧࡛ᡂ⇍㞝ࡢ᭶ูฟ⌧ᩘࢆㄪᰝࡋࡓࠋ㔠㫣†࡟࠾ࡅࡿ࢜࢖࢝࣡ࡢ⫧‶ᗘࡣ㸪᭷ព࡞ኚືࡀぢࡽࢀࡎ㸪ᖺ㛫ࢆ㏻ࡌ࡯ࡰ୍ᐃ࡛࠶ࡿࡢ࡟ᑐࡋ㸪௚ࡢἙᕝࡢಶయ࡛ࡣ᭷ព࡞ኚືࡀぢࡽࢀ㸪෤Ꮨ࡟పࡃ㸪ኟᏘ࡟㧗ࡃ࡞ࡿഴྥࢆ♧ࡋࡓࠋࡲࡓ㸪㔠㫣†࢜࢖࢝࣡ࡢᡂ⇍㞝ಶయࡣ㸪ὶධ㒊࡛ࡣฟ⌧ᩘ࡟ኚືࡣ࠶ࡿࡀ㸪ᖺ㛫ࢆ㏻ࡋ࡚ᖖ࡟☜ㄆࡉࢀࡓࡢ࡟ᑐࡋ㸪ὶฟ㒊࡛ࡣᏘ⠇ኚືࡀ㢧ⴭ࡟ぢࡽࢀ㸪1-2 ᭶࡜ 11-12 ᭶࡛ࡣぢࡽࢀࡎ㸪3 ᭶࠿ࡽ 10 ᭶ࡢ㛫࡟ほᐹࡉࢀ㸪≉࡟
7-8 ᭶࡟ከࡃ࡞ࡿࡇ࡜ࡀ♧ࡉࢀࡓࠋ ࡇࢀࡽ⫧‶ᗘࡸᡂ⇍㞝ฟ⌧ᩘ࡟࠾ࡅࡿᕪ␗ࡣ㸪⏕ᜥ⎔ቃࡢỈࡢ㐪࠸ࢆ཯ᫎࡋࡓࡶࡢ࡜᥎ࡉࢀࡓࠋ

࣮࣮࠙࢟࣡ࢻࠚ  ࢜࢖࢝࣡㸦Zacco platypus㸧 㔠㫣† ⫧‶ᗘ㸦య㛗㸭య㔜㸱㸧 ᡂ⇍㞝ฟ⌧ᩘࡣࡌࡵ࡟࢜࢖࢝࣡㸦Zacco platypus㸧ࡣ㸪Ἑᕝࡢ୰ὶ࠿ࡽୗὶᇦ࠾ࡼࡧ†἟࡟⏕ᜥࡋ㸪᪥ᮏ࠾ࡼࡧᮅ
㩭༙ᓥ㸪ྎ‴㸪୰ᅜ༡ᮾ㒊࡟࠿ࡅ࡚ᗈࡃศᕸࡍࡿῐỈ㨶࡛࠶ࡿ(ᕝ㑣㒊࡯࠿㸪2005)ࠋࡑࡢ⏘༸ᮇࡣ㸪୰ὶᇦ࡛ࡣ 6 ᭶࠿ࡽ 8 ᭶(୰ᮧ㸪1952㸹ྡ㉺࡯࠿㸪1962㸹Ỉཱྀ㺃ᷓᒣ㸪1969)㸪ୗὶᇦ࡛ࡣ 7 ᭶ୖ᪪࠿ࡽ 8 ᭶ୗ᪪࡜ࡉࢀ࡚࠸ࡿ(Ỉ㔝࡯࠿㸪1958)ࠋࡇࡢ᫬ᮇ㸪ᡂ⇍ࡋࡓ㞝࡟ࡣ㢧ⴭ࡞፧
ጻⰍ࡜㏣ᫍࡀ⌧ࢀࡿ㸦୰ᮧ㸪1952㸹Ỉཱྀ࣭ᷓᒣ㸪1969㸧ࠋ⏘༸ᮇ࡟࠾ࡅࡿἙᕝࡢỈࡣ㸪⏘༸㛤ጞ㸦6 ᭶㡭㸧࡛ࡣ 18㹼20Υ࡛㸪┒ᮇ㸦7-8 ᭶㡭㸧࡛ࡣ 20㹼23Υ࡜࡞ࡿ(Ỉ㔝࡯࠿, 1958㸹బᖹᡂ 22 ᖺ 5 ᭶ 28 ᪥ཷ⌮㸨ࡓ࠿ࡣࡲ࣭ࡦ࡛ࡁ ኱ศ኱Ꮫᩍ⫱⚟♴⛉Ꮫ㒊⏕≀Ꮫᩍᐊ㸨㸨࠾࠾ࡃࡽ࣭࡚ࡘࡸ ኱ศ኱Ꮫ኱Ꮫ㝔ᩍ⫱Ꮫ◊✲⛉ᩍ⛉ᩍ⫱ᑓᨷ⌮⛉ᩍ⫱ᑓಟ㸦⌧஑ᕞᘓタࢥࣥࢧࣝࢱࣥࢺᰴᘧ఍♫㸧216㧗 ℈࣭኱ ಴⸨࡯࠿㸪1996)ࠋ⏘༸ᮇ࡜Ỉࡢୖ᪼࡜ࡢ㛫࡟ࡣᐦ᥋࡞㛵㐃ࡀ࠶ࡾ㸪Ỉୖ᪼ࡀ࢜࢖࢝࣡ࡢᦤ㣗㔞ࢆቑ኱ࡉࡏ㸪ಶయࡢᛶᡂ⇍ࢆಁࡋ㸪⏘༸࡟࠸ࡓࡽࡏࡿࡶࡢ࡜᥎ᐹࡉࢀ࡚࠸ࡿ(ᕝ㑣㒊࡯࠿㸪2005)ࠋࡑࡢ㝿㸪⫧‶ᗘࡣᡂ㛗࣭ᡂ⇍ࡢᣦᶆ࡜ࡋ࡚⏝࠸ࡽࢀࡿࠋ୰ᮧ㸦1952㸧ࡣ㸪༓᭤ᕝ࡟⏕ᜥࡍࡿ࢜࢖࡛࢝࣡㸪⫧‶ᗘࡢᏘ⠇ኚ໬ࢆㄪᰝࡋࡓࠋࡑࢀ࡟ࡼࡿ࡜㸪⫧‶ᗘࡣ᫓࠿ࡽึኟ㸦5 ᭶
࠿ࡽ 7 ᭶㸧࡟࠿ࡅ࡚㧗ࡃ㸪⛅࠿ࡽ෤㸦9 ᭶࠿ࡽ 2 ᭶㸧࡟࠿ࡅ࡚పࡃ࡞ࡾ㸪ᴫࡋ࡚⏘༸ᮇ࡟㧗࠸್࡛࠶ࡿࡇ࡜ࡀ♧ࡉࢀࡓࠋ㔠㫣†ࡣ኱ศ┴‫‮‬ᕸ㝔┅ᆅࡢ࡯ࡰ୰ኸ࡟࠶ࡾ㸪࿘ᅖ⣙ 400m ࡢῐỈ†࡛࠶ࡿࠋ㔠㫣†࡟ὶࢀ㎸ࡴἙᕝ࡟ࡣ኱ᑠ࠶ࢃࡏ࡚ 5 ᮏ࠶ࡾ㸪ࡑࡢ୍ࡘࠕࣁ࢚ᕝࠖ
㸦ᕝす㸪1997㸧࡛ࡣỈἨỈࡀὶධࡋ㸪ࡀ࡯ࡰ 30Υ࡟ಖࡓࢀ࡚࠸ࡿỈᇦࡀ࠶ࡿࠋᡃࠎࡣ㸪ࡑࡇ࡟⏕ᜥࡍࡿ࢜࢖࢝࣡࡟ࡘ࠸࡚㸪኱ศ┴ෆࡢ௚ࡢἙᕝ࡟⏕ᜥࡍࡿಶయ࡜ẚ㍑ࡋ㸪እ㒊ᙧែ㸪ෆ㒊ᙧែ࠾ࡼࡧ⦾Ṫ⾜ືࢆ◊✲ࡋ࡚ࡁࡓ㸦㧗℈㺃኱಴㸪2009a㸪2009b㸹㧗℈㺃኱಴㸪2010㸧ࠋ㔠㫣†⏘ಶయࡣ㸪㫣㝯㉳⥺㛫㝸ࡀ୍ᐃ࡛ᗈࡃ࡞ࡗ࡚࠸࡚Ᏻᐃࡋࡓᡂ㛗ࢆ♧၀ࡋ࡚࠸ࡿࡇ࡜㸪య㛗 100mm ௨ୗࡢᑠᆺࡢ㞝ᡂ⇍ಶయࡀฟ⌧ࡋ㸪ࡑࡢ⢭ᕢࡣ⢭Ꮚ࡛‶ࡓࡉࢀ㸪᪩ᮇࡢᛶᡂ⇍ࢆ♧၀ࡋ࡚࠸ࡿࡇ࡜㸪෤Ꮨ࡟࠾࠸࡚ࡶ⏘༸⾜ືࡀほᐹࡉࢀࡿࡇ࡜࡞࡝㸪௚ࡢἙᕝ࡛ࡣぢࡽࢀ࡞࠸≉ᚩࢆ᫂ࡽ࠿࡟ࡋࡓࠋᮏ◊✲ࡣ㸪Ỉࡀ㧗ࡃኚືࡢᑡ࡞࠸⎔ቃ࡛ࡢ⏕⫱ࡀ㔠㫣†⏘࢜࢖࢝࣡ᅛ᭷ࡢᙧែⓗ≉ᚩࢆࡶࡓࡽࡍ࡜࠸࠺ࡇ࡜ࢆ☜࠿ࡵࡿࡓࡵ㸪㔠㫣†ὶධ㒊㸦ࣁ࢚ᕝ㸧࡜௚Ἑᕝ࡛᥇㞟ࡉࢀࡓಶయࡢ⫧‶ᗘ㸦య㛗㸭య㔜 㸱 㸧ኚືࢆゎᯒࡋ㸪ὶධ㒊࡜ࡑࡇࡼࡾỈࡀపࡃᑡࡋኚືࡍࡿὶฟ㒊࡛ᡂ⇍㞝ࡢฟ⌧ᩘࢆㄪᰝࡋࡓࠋᮦᩱ࡜᪉ἲ㔠㫣†࡟ὶධࡍࡿἙᕝ㸦ὶධ㒊㸪ࣁ࢚ᕝ㸧࡞ࡽࡧ࡟኱ศ┴ෆࡢἙᕝ㸦ᑿ⏣ᕝ㸪ᐮ⏣ᕝ㸪ྂᕝ㸧࡛࢜࢖࢝࣡㸦Zacco platypus㸧ࢆ㸪2009 ᖺ 1 ᭶࠿ࡽ 2009 ᖺ 12 ᭶ࡲ࡛㸪᭶࡟ 1 ᅇࢭࣝࣅࣥࡸ
ࢱࣔ⥙➼ࢆ⏝࠸࡚᥇㞟ࡋࡓࠋ᥇㞟ࡋࡓಶయࡢ࠺ࡕ㸪40mm ௨ୖࡢಶయ㸦㔠㫣†ὶධ㒊࡛ྜィ 1035ಶయ㸪௚ࡢἙᕝ࡛ྜィ 275 ಶయ㸧ࡢయ㛗࡜య㔜ࢆィࡋ㸪⫧‶ᗘ㹙య㔜㸦g㸧㸭య㛗㸦cm㸧㸱×1000ࠞࢆ⟬ฟࡋࡓ㸦బ⸨࡯࠿㸪1997㸧ࠋ㔠㫣†ࡢὶධ㒊࡜ὶฟ㒊࡛㸪ᡂ⇍㞝ࡢಶయᩘࢆ┠ど࡟ࡼࡾィࢆࢹࢪࢱࣝỈ

ࡋࡓࠋ᥇㞟᫬㸪᥇㞟ሙᡤࡢỈィ࡛グ㘓ࡋࡓࠋ

⤖ᯝ࠙⫧‶ᗘࡢ᭶ูኚ໬ࠚ
㔠㫣†ὶධ㒊㸦ᖹᆒỈ

30.4Υ㸪᭱㧗᭱ప

ᗘᕪ 1.3Υ㸧࡛᥇㞟ࡉࢀࡓ࢜࢖࢝࣡࡟࠾ࡅࡿ⫧‶ᗘࡣ㸪ᖺ㛫ࢆ㏻ࡌ࡚ኚືࡀᑡ࡞ࡃ㸪୍ᐃ࡛࠶ࡿࡇ࡜ࡀ♧ࡉࢀࡓ㸦ᅗ㸯㸧ࠋᖺᖹᆒ⫧‶ᗘ㸦sᶆ‽೫ᕪ㸧ࡣ 14.2㸦s1.6㸧࡛㸪᭱㧗್ࡣ 10 ᭶࡛ 15.0㸦s1.6㸧㸪᭱ప್ࡣ 2 ᭶࡛ 13.7㸦s1.7㸧㸪
ࡑࡢᕪࡀ 1.3 ࡛᭷ពᕪࡣㄆࡵࡽࢀ࡞࠿ࡗࡓ㸦㹲-᳨ᐃ㸪 㹮㸼0.05㸧ࠋ୍᪉㸪኱ศ┴ෆࡢ௚ࡢἙᕝ
㸦ᖹᆒỈ

16.7Υ㸪᭱㧗᭱ప

ᗘᕪ 11.8Υ㸧࡛᥇㞟ࡋࡓಶయ࡟࠾ࡅࡿ⫧‶ᗘࡣ㸪ኟᏘ࡟㧗ࡃ㸪෤Ꮨ࡟ప࠸࡜࠸࠺ഴྥࡀぢࡽࢀ㸪Ꮨ⠇ኚືࡀ࠶ࡿࡇ࡜ࡀ♧ࡉࢀࡓ㸦ᅗ㸰㸧ࠋᖺᖹᆒ⫧‶ᗘࡣ 14.3
㸦s1.7㸧࡛㸪᭱㧗್ࡣ 6 ᭶࡛ 16.1㸦s1.4㸧㸪᭱ప್ࡣ 1 ᭶࡛ 11.7㸦s0.9㸧㸪ࡑࡢᕪࡣ 4.4 ࡛᭷ពᕪࡀㄆࡵࡽࢀࡓ㸦㹲-᳨ᐃ㸪㹮㸺0.05㸧ࠋ217㔠㫣†࡟⏕ᜥࡍࡿ࢜࢖࢝࣡ࡢ⫧‶ᗘ࡜ᡂ⇍㞝ฟ⌧ᩘ㻞㻡
㻞㻜

咁䉝咂

㻞㻜㻟㻜

㻝㻡

Ỉ㻞㻡㻟㻡

㻞㻜

⫧ ‶ᗘ

㻝㻡

咁䉝咂

⫧ ‶ᗘ

㻟㻜Ỉ㻟㻡㻞㻜

㻝㻜㻝㻜㻝㻡

㻝㻡
㻝㻜

㻡

㻝㻜

㻡㻡㻡㻜

㻜㻜㻝㻞㻟㻠㻡㻢㻣㻤㻥 㻝㻜 㻝㻝 㻝㻞 ᭶㻝ᅗ䠍 㔠㫣†ὶධ㒊䛷᥇㞟䛥䜜䛯䜸䜲䜹䝽䛾⫧‶ᗘ䠄䕔䠅䛸Ỉ 䠄䕦䠅䛾᭶ูኚ໬㻟㻜㻢㻜㻞㻡㻡㻜㻠㻡㻢㻣㻤㻜㻥 㻝㻜 㻝㻝 㻝㻞 ᭶ᅗ䠎 ኱ศ┴ෆ䛾௚䛾Ἑᕝ䛷᥇㞟䛥䜜䛯䜸䜲䜹䝽䛾⫧‶ᗘ䠄䕔䠅䛸Ỉ 䠄䕦䠅䛾᭶ูኚ໬咁䉝咂㻟㻡㻣㻜㻟Ỉᡂ⇍㞝ฟ⌧ᩘ㻤㻜㻞㻞㻜㻠㻜㻝㻡㻟㻜㻞㻜㻝㻜㻝㻜㻡㻜㻝㻞㻟㻠㻡㻢㻣㻤㻜㻥 㻝㻜 㻝㻝 㻝㻞 ᭶ᅗ䠏 㔠㫣†ὶධ㒊䛻䛚䛡䜛䜸䜲䜹䝽ᡂ⇍㞝ฟ⌧ᩘ䠄䕔䠅䛸Ỉ 䠄䕦䠅䛾᭶ูኚ໬㻞㻡㻡㻜咁䉝咂㻟㻜㻢㻜Ỉ㻟㻡㻣㻜ᡂ⇍㞝ฟ⌧ᩘ㻤㻜ᅗ䠐 㔠㫣†ὶධ㒊䛷䜸䜲䜹䝽ᡂ⇍㞝䛾኱ᆺಶయ䠄▮༳䠅䛸ᑠᆺಶయ䠄䕧䠅䛜ΰὋ䛧䛶䛔䜛䛣䛸䜢♧䛩෗┿㻞㻜㻠㻜㻝㻡㻟㻜㻞㻜㻝㻜㻝㻜㻡㻜㻝㻞㻟㻠㻡㻢㻣㻤㻜㻥 㻝㻜 㻝㻝 㻝㻞 ᭶ᅗ䠑 㔠㫣†ὶฟ㒊䛻䛚䛡䜛䜸䜲䜹䝽ᡂ⇍㞝ฟ⌧ᩘ䠄䕔䠅䛸Ỉ 䠄䕦䠅䛾᭶ูኚ໬ᅗ䠒 㔠㫣†ὶฟ㒊䛷ከᩘ䛾䜸䜲䜹䝽ᡂ⇍㞝䛜⩌Ὃ䛧䛶䜛䛣䛸䜢♧䛩෗┿218㧗 ℈࣭኱ ಴࠙ᡂ⇍㞝ฟ⌧ᩘࡢ᭶ูኚ໬ࠚ㔠㫣†ࡢὶධ㒊࡟࠾ࡅࡿᡂ⇍㞝ฟ⌧ᩘࡢ᭶ูኚ໬ࢆᅗ㸱࡟♧ࡍࠋᡂ⇍㞝ࡣ㸪4 ᭶࡟᭱኱㸦23ᑿ㸧࡛㸪12 ᭶࡟᭱ᑠ㸦2 ᑿ㸧࡜࡞ࡾ㸪ኚືࡀ࠶ࡿࡶࡢࡢ㸪ᖺ㛫ࢆ㏻ࡌ࡚ᖖ࡟Ꮡᅾࡋࡓࠋ᭱ࡶከ
࠸ 4 ᭶࡛ࡣ㸪ⴭࡋࡃయ㛗ࡢ␗࡞ࡿᡂ⇍㞝㸦య㛗 100mm ௨ୖࡢ኱ᆺಶయ࡜ 100mm ௨ୗࡢᑠᆺಶయ㸧ࡀྠࡌỈᇦ࡛㐟Ὃࡋ࡚࠸ࡿࡢࡀほᐹࡉࢀࡓ㸦ᅗ㸲㸧ࠋ㔠㫣†ࡢὶฟ㒊㸦ᖹᆒỈ 20.1Υ㸪᭱㧗᭱ప ᗘᕪ 5.3Υ㸧࡟࠾ࡅࡿᡂ⇍㞝ฟ⌧ᩘࡢ᭶ูኚ໬ࢆᅗ㸳࡟♧ࡍࠋࡇࡇ࡛ࡣ㸪ᡂ⇍㞝ࡀ 3᭶࠿ࡽฟ⌧ࡋࡣࡌࡵ㸪ኟᏘ㸦7 ᭶࡜ 8 ᭶࡛ࡣ 60 ᑿ௨ୖ㸧࡟᭱኱࡜࡞ࡾ㸦ᅗ㸴㸧㸪ࡑࡢᚋῶᑡࡋ㸪
10 ᭶ࡲ࡛☜ㄆࡉࢀࡓࠋ1 ᭶࠿ࡽ 2 ᭶ࡢ㛫࡜ 11 ᭶࠿ࡽ 12 ᭶ࡢ㛫࡛㸪ᡂ⇍㞝ࡣ඲ࡃほᐹࡉࢀࡎ㸪ฟ⌧᫬ᮇࡀ㝈ᐃࡉࢀ࡚࠸ࡿࡇ࡜ࢆ♧ࡋࡓࠋ⪃ᐹᮏ◊✲ࡣ㸪Ỉࡀ㧗ࡃᏳᐃ࡞㔠㫣†ὶධ㒊࡟⏕ᜥࡍࡿ࢜࢖࡛࢝࣡ࡣ㸪ᖺ㛫ࢆ㏻ࡌ࡯ࡰ୍ᐃࡢ

⫧‶ᗘ࡛ᡂ⇍㞝ಶయࡀᖖ࡟Ꮡᅾࡍࡿࡇ࡜㸪Ỉࡀᑡࡋపࡃኚ໬ࡢ࠶ࡿ㔠㫣†ὶฟ㒊࡛ࡣ㸪ᡂ⇍㞝ࡢฟ⌧᫬ᮇࡀ㝈ᐃࡉࢀ࡚࠸ࡿࡇ࡜ࢆ♧ࡋࡓࠋࡇࢀࡲ࡛◊✲ࡉࢀ࡚ࡁࡓ࢜࢖࢝࣡࡟࠾ࡅࡿ⫧‶ᗘࡣ㸪Ꮨ⠇ኚ໬ࡀ࠶ࡾ㸪᫓Ꮨ࠿ࡽኟᏘ࡟㧗ࡃ࡞ࡾ㸪⛅Ꮨ࠿ࡽ෤Ꮨ࡟పࡃ࡞ࡿ࡜࠸࠺ࡶࡢ࡛࠶ࡿ㸦୰ᮧ㸪1952㸧ࠋࡇࡢ⫧‶ᗘኚືࡢせᅉ࡜ࡋ࡚㸪ᦤ㣗㔞ࡢኚ໬ࡀ࠶ࡆࡽࢀ㸪᫓ᏘỈࡿࡀ㸪෤Ꮨ࡟ྥࡅ࡚Ỉࡢୖ᪼࡜࡜ࡶ࡟άື㔞ࡀቑࡋ㸪ᦤ㣗㔞ࡣḟ➨࡟ቑ኱ࡍୗ㝆࡟ࡼࡾάື㔞ࡀୗࡀࡿ࡜࡜ࡶ࡟㸪ᦤ㣗㔞ࡶḟ➨࡟పୗࡍࡿ࡜ࡉࢀ࡚࠸ࡿ㸦ᕝ㑣㒊࡯࠿㸪2005㸧ࠋࡲࡓ㸪Ỉࡀ᭱ࡶ㧗ࡃ࡞ࡿ 8 ᭶ࡼࡾࡶ๓࡟⫧‶ᗘࡢᛴ⃭࡞పୗࡀ㉳ࡇࡿࡢࡣ㸪⏘༸ᮇ࡟࠾ࡅࡿ㞤ಶయࡢ⏘༸࡟ࡼࡿᙳ㡪࡜⪃࠼ࡽࢀ࡚࠸ࡿࠋᮏ◊✲࡛♧ࡉࢀࡓ኱ศ┴ෆࡢ௚ࡢἙᕝ࡛᥇㞟ࡉࢀࡓಶయ࡟࠾ࡅࡿ⫧‶ᗘኚືࡣ㸪ࡇࢀࡲ࡛ሗ࿌ࡉࢀ࡚࠸ࡿ⤖ᯝ࡜୍⮴ࡋ㸪Ꮨ⠇ኚືࡀ࠶ࡿࡇ࡜ࢆ♧ࡋࡓࠋ୍᪉㸪Ỉࡀ㧗ࡃ⥔ᣢࡉࢀ࡚࠸ࡿ㔠㫣†ὶධ㒊࡛ࡣ⫧‶ᗘࡢ୍ᐃᛶࡀ♧ࡉࢀ㸪ࡇࡇ࡛ࡣᦤ㣗ࡀᖖ࡟࠶ࡾ㸪ಶయࡀᏳᐃࡋ࡚ᡂ㛗ࡋ࡚࠸ࡿ࡜᥎ࡉࢀࡓࠋࡲࡓ㸪ࡇࢀࡲ࡛ࡢ◊✲㸦㧗℈㺃኱಴㸪2009a㸧࡛㸪㔠㫣†⏘ಶయ࡛ࡣ㫣㝯㉳⥺㛫㝸ࡀᗈࡃ୍ᐃ࡛࠶ࡿࡇ࡜ࢆ♧ࡋࡓࡀ㸪ࡇࡢࡇ࡜ࡶᖺ㛫ࢆ㏻ࡌࡓᏳᐃᡂ㛗ࢆ⿬௜ࡅ࡚࠸ࡿࠋ࢜࢖࢝࣡ࡢ⏘༸ᮇࡣ㸪㏻ᖖ 6 ᭶࠿ࡽ 8 ᭶ࡢ㛫࡜ࡉࢀ㸪ࡇࡢᮇ㛫࡟㢧ⴭ࡞፧ጻⰍ࡜㏣ᫍࢆᣢࡘᡂ⇍㞝ࡀฟ⌧ࡍࡿ㸦୰ᮧ㸪1952㸹Ỉ㔝࡯࠿㸪1958㸧ࠋ㔠㫣†ὶධ㒊࡛ࡣ㸪ᡂ⇍㞝ࡀᖺ㛫ࢆ㏻ࡌ࡚ᖖ࡟☜ㄆࡉࢀࡿࡇ࡜࠿ࡽ㸪≉ᐃࡢ⏘༸ᮇ㛫ࡀ࡞ࡃ㸪⏘༸ᮇࡀ࿘ᖺ໬ࡋ࡚࠸ࡿ࡜᥎ࡉࢀࡿࠋᡃࠎࡣ㸪ᡂ⇍㞝ࡀ᭱ࡶᑡ࡞ࡃ࡞ࡿ᫬ᮇ㸦12 ᭶㸧࡟㔠㫣†ὶධ㒊࡛㸪⏘༸⾜ືࢆほᐹࡋࡓࡀ㸦㧗℈࣭኱಴㸪2009b㸧㸪ࡇࡢࡇ࡜ࡶ⏘༸ᮇࡢ࿘ᖺ໬ࢆ⿬௜ࡅ࡚࠸ࡿࠋ୍᪉㸪㔠㫣†ὶฟ㒊࡛ࡣᡂ⇍㞝ࡀぢࡽࢀ࡞࠸᫬ᮇࡀ࠶ࡾ㸪ฟ⌧ࡋ࡚࠸ࡿ 3 ᭶࠿ࡽ 10 ᭶ࡢ㛫ࡀ⏘༸ᮇ࡛࠶ࡿ࡜᥎ᐃࡉࢀࡓࠋࡋ࠿ࡋ࡞ࡀࡽ㸪ࡇࡢᮇ㛫ࡣ㏻ᖖࡢ⏘༸ᮇࡼࡾࡶ㛗ࡃ㸪⏘༸ᮇࡢ㛗ᮇ໬ࢆព࿡ࡋ࡚࠸ࡿࠋ⫧‶ᗘࡢ୍ᐃ໬ࡸ⏘༸ᮇࡢ࿘ᖺ໬࠶ࡿ࠸ࡣ㛗ᮇ໬࡜࠸࠺≉ᚩࡣ㸪኱ศ┴ෆ࡛ࡣ㔠㫣†ࡢ࢜࢖࢝࣡࡟ࡢࡳぢࡽࢀࡿࠋࡋ࠿ࡋ㸪⏕ά᤼Ỉࡢᙳ㡪➼࡛ἙᕝỈࡢ㧗ࡋࡓ≉ᚩࡀ୍⯡໬ࡋ࡚ࡃࡿ࡜ண໬ࡀ㐍⾜ࡋࡓỈᇦ࡛ࡣ㸪ࡇ࠺ࡉࢀࡿࠋ࢜࢖࢝࣡ࡣྛᆅ࡛ᬑ㏻࡟ぢࡽࢀ㸪௚ࡢ㨶✀ࡀಶయᩘࢆḟ➨࡟ῶᑡࡉࡏࡿ୰࡛㸪ቑ኱ࡋ࡚࠸ࡿ✀ࡢ୍ࡘ࡛࠶ࡿࠋ࢜࢖࢝࣡ࡣ㸪Ἑᕝࡸ†἟ࡢỈࢆࣔࢽࢱࣜࣥࢢࡍࡿୖ࡛㐺ࡋ࡚࠸ࡿ࡜⪃࠼ࡽࢀࡿࠋ⎔ቃ㔠㫣†࡟⏕ᜥࡍࡿ࢜࢖࢝࣡ࡢ⫧‶ᗘ࡜ᡂ⇍㞝ฟ⌧ᩘ

219ᘬ⏝ᩥ⊩1㸧ᕝ㑣㒊ᾈဢ࣭Ỉ㔝ಙᙪ࣭⣽㇂࿴ᾏ(2005)㸸᪥ᮏࡢῐỈ㨶㸦ᨵゞ∧㸧㸬ᒣ࡜῱㇂♫㸪pp㸬244㸫249㸬
2㸧୰ᮧ୍㞝(1952)㸸༓᭤ᕝ⏘࢜࢖࢝࣡㸦Zacco platypus㸧ࡢ⏕άྐ㸦⎔ቃࠊ㣗ᛶࠊ⏘༸ࠊⓎ⏕ࠊᡂ㛗඼௚㸧୪࡟ࡑࡢ⁺ᴗ Bull. Freshwater Fish Lab. Vol. 1 No. 1 ῐỈ༊Ỉ⏘◊✲ᡤᴗ⦼ 3 ྕ㸬
3㸧ྡ㉺ㄔ࣭ᕝ㑣㒊ᾈဢ࣭Ỉ㔝ಙᙪ࣭ᐑᆅఏ୕㑻࣭᳃୺୍࣭ᮡᒣᖾ୸࣭∾ᒾ⏨࣭㰺⸨ὒᏊ (1962)㸸 ᕝࡢ㨶ࡢ⏕ά Ϫ㸬࢜࢖࢝࣡ࡢ⏕άྐࢆ୰ᚰ࡟ࡋ࡚ ி㒔኱Ꮫ⌮Ꮫ㒊 ⏕⌮⏕ែᏛ◊✲ᴗ⦼ ➨ 82ྕ㸬4㸧Ỉཱྀ᠇ဢ࣭ᷓᒣ⩏ኵ(1969)㸸࢜࢖࢝࣡㸪 Zacco platypus (Temminck and Schlegel)ࡢ⦾Ṫ㸫Ϩ㸬⮌㫅࡟࠾ࡅࡿᛶᚩ࡜ᡂ⇍㸬㨶㢮Ꮫ㞧ㄅ㸪16 ᕳ㸪1 ྕ㸪17-23㸬
5㸧Ỉ㔝ಙᙪ࣭ᕝ㑣㒊ᾈဢ࣭ᐑᆅఏ୕㑻࣭᳃୺୍࣭ඣ⋢ᾈ᠇࣭኱୵❳୍࣭᪥ୗ㒊᭷ಙ࣭ྂᒇඵ㔜Ꮚ(1958)㸸
ᕝࡢ㨶ࡢ⏕άϨ㸬ࢥ࢖⛉ 4 ✀ࡢ⏕άྐࢆ୰ᚰ࡟ࡋ࡚ ி㒔኱Ꮫ⌮Ꮫ㒊 ⏕⌮⏕ែᏛ఍◊✲ᴗ⦼ห⾜఍㸬6㸧బ⸨ᩔᙪ࣭᪂஭⫕࣭ᡭᓥ༓㔛(1996)㸸࢜࢖࢝࣡ࡢቑṪ࡟㛵ࡍࡿ◊✲̿ϩ㸦Ỉ ࡜⏘༸⾜ື㸧㸬⩌㤿┴Ỉ⏘ヨ㦂ሙ◊✲ሗ࿌㸪➨ 2 ྕ㸪39-42㸬
7㸧ᕝす༤(1997)㸸㔠㫣†ࡢỈ཰ᨭ㸬‫‮‬ᕸ㝔⏫㸪p1-25㸬
8㸧㧗℈⚽ᶞ࣭኱಴㕲ஓ(2009a)㸸㔠㫣†࡟⏕ᜥࡍࡿ࢜࢖࢝࣡(Zacco platypus)ࡢᙧែⓗ≉ᚩϨ㸬ᛶᡂ⇍࡜㫣㝯㉳⥺㛫㝸࡟ࡘ࠸࡚㸬኱ศ኱Ꮫᩍ⫱⚟♴⛉Ꮫ㒊◊✲⣖せ㸪➨ 31 ᕳ㸪➨ 1 ྕ㸪51-55㸬
9㸧㧗℈⚽ᶞ࣭኱಴㕲ஓ(2009b)㸸㔠㫣†࡟⏕ᜥࡍࡿ࢜࢖࢝࣡(Zacco platypus)ࡢ෤Ꮨ࡟࠾ࡅࡿ⏘༸⾜ື㸬኱ศ኱Ꮫᩍ⫱⚟♴⛉Ꮫ㒊◊✲⣖せ㸪➨ 31 ᕳ㸪➨ 2 ྕ㸪115-118㸬
10㸧㧗℈⚽ᶞ࣭኱಴㕲ஓ(2010)㸸㔠㫣†࡟⏕ᜥࡍࡿ࢜࢖࢝࣡(Zacco platypus)ࡢᙧែⓗ≉ᚩϩ㸬⢭ᕢࡢᡂ⇍࡟ࡘ࠸࡚㸬኱ศ኱Ꮫᩍ⫱⚟♴⛉Ꮫ㒊◊✲⣖せ㸪➨ 32 ᕳ㸪➨ 1 ྕ㸪81-85㸬
11㸧బ⸨ᩔᙪ࣭⏣୰ⱥᶞ࣭ᡭᓥ༓㔛(1997)㸸࢜࢖࢝࣡ቑṪ࡟㛵ࡍࡿ◊✲̿Ϫ㸦Ỉ ࡜ᡂ⇍ಁ㐍㸧㸬⩌㤿┴Ỉ⏘ヨ㦂ሙ◊✲ሗ࿌㸪➨ 3 ྕ㸪25-27㸬220㧗 ℈࣭኱ ಴

Morphological Characteristics of a Cyprinid, Zacco platypus,
in the Lake Kinrin. Ϫ.
̿ Body Mass Index and Mature Males. ̿TAKAHAMA, Hideki and OKURA, Tetsuya

Abstract
We have previously demonstrated that characteristic features(broad and constant length of scale circuli, early maturation in small

males, and reproductive behavior in winter) appear in Zacco platypus
collected from the Lake Kinrin.

To clarify that high and stable watertemperature in the fish habitats reflects on these features, the present
study was undertaken analysis on the body mass index (body length/bodyweight3) of individuals collected from the influx (mean water temperature
30.4 Υ ) of the the Lake Kinrin and the other rivers (mean watertemperature 11.8Υ) in the Oita Prefecture, and counts of mature males at
the influx and debouchment (mean water temperature 16.7Υ) of the Lake
Kinrin.

The body mass index of individuals from the Lake Kinrin wasconstant throughout the year, but the body mass index of ones from theother rivers was variable, lower in the winter and higher in the summer.
At the influx into the Lake Kinrin, mature males were always visible
throughout the year though the number of them was variable.

On theother hand, mature males at the debouchment were observed from May
into October, and absent from January to February and from November toDecember.

The number of mature males reached the maximum at Julyand August. It has suggested that these results are caused by different
water temperatures in the fish habitats.
䛆Key wordsࠚ  Zacco platypus,(body length/body weight3),

The Lake Kinrin,

Mature males

Body mass index