type:論文

四国鬼ヶ城山と九州地方全域の淡水棲三岐腸類の分布を調査した結果,ナミウズムシDugesia japnica ICHIKAWA et KAWAKATSU,1964 とミヤマウズムシPhagocala vivida(IJIMA et KABURAKl,1916)が採集された。前種は標高810m(市房山)～900m(鬼ヶ城山)以下のあらゆる水域に出現し,後種は鬼ヶ城山で標高440～900mの範囲に(垂直分布型はJJV),九州山地・九重山地・筑紫山地・多良で標高480～1700mの範囲に出現した。垂直分布型は,九州の上記の地域はJ-JV-V,その他の地域はJで示される。棲息水温範囲は,D.japonica が4.5～19.5℃,Ph.vividaが7.0～15.2℃であった。西日本における Ph. vivida の分布南限線について考察を加えた。九州における本種の分布南限線は現在までの調査では祖母山～市房山～白髪山～国見岳～三方山～九重山～八方ヶ岳～羽金山～多良岳を結ぶ線(阿蘇火山を除く)で,その東端は四国鬼ヶ城山に続き,その北端は朝鮮半島の小白山脈南端に続いている(Fig.1)。九州山地の東側では,分布南限線が多少東にずれる可能性がある。四国こおける分布南限線は現在判明している小豆島～剣山～赤石山系～石槌山～鬼ヶ城山を結ぶ線よりも南にずれる可能性があり,なお未確定であることを指摘した。

Report on the ecological survey of freshwater planarians in the Mt. Onigajo district in Shikoku and Kyushu, with a note on the southern limit of distribution of Phagocata vivida in Southwest Japan. Masaharu KAWAKATSU. (Biological Laboratory, Fuji Women's College, Sapporo), Nobuo TAKAHASHI (The First Middle School of Takatsuki, Takatsuki), Goro OKAFUJI (Omine High School, Mine), and Hiroichi YOSHIDA(Fukuoka High School, Fukuoka). The vertical distribution of freshwater planarians in the southwestern part of Shikoku (Mt. Onigajo-yama and its adjacent district ; Lat. 33°10'N. to Lat. 33°15'N. and Long. 132°30'E. to Long. 132°45'E.) and Kyushu ( Lat. 31°20'N. to 34°00' N. and Long. 130°00' E. to Long. 131°30' E.) was surveyed during the years 1957 to 1975. In the present paper, the data obtained In these areas are described together with some fragmental records on the distribution of planarians reported by several workers. Mt. Onigajo-yama (alt. 1142 m) is located at the southwestern end of the Shikoku Mountains. The distributional ecology of planarians in the districts of Mt. Tsurugi-yama (alt. 1955 m) and Mt. Ishizuchi-yama (alt. 1921 m) was already reported in the previous papers (cf. KAWAKATSU & ITO 1963; KAWAKATSU & OGAWARA 1968, 1969). The topography and geology of Kyushu are rather complicated. The Kyushu mountainous district which consists of rather high mountains is the backbone of Kyushu (the highest peak, Mt. Sobo-san, is 1757 m in altitude). The southern side of this mountainous district is called South Kyushu. The Tsukushi mountainous district is situated in the northern part of Kyushu (about 1000 metres or more in altitude). Kyushu is also characterized by many volcanoes belonging to three volcanic zones, i. e., the Kirishima, the Aso and the Hakusan Volcanic Zones (see Fig. 1). The main river systems in Kyushu are the Kuma River, the Shirakawa River, the Chikugo River, the Onga River, the Gokase River, the Mimikawa River, the Ichinose River, and the Honjo River. Two species of freshwater planarians, Dugesia japonica ICHIKAWA et KAWAKATSU and Phagocata vivida (IJIMA et KABURAKI), were found in the area surveyed. D. japonica was common at the stations below the altitude of about 810 metres (Mt. Ichibusa-yama in Kyushu) and 900 metres (Mt. Onigajo-yama in Shikoku), respectively. Ph. vivida was less common than D. japonica at the cold-water stations in the mountainous districts both in Shikoku and Kyushu. In the Mt. Onigajo district, this species was found at the stations within the altitude range from about 440 to 900 metres. In Kyushu, this species was distributed in the Kyushu mountainous district, the Kuju mountainous district, the Tsukushi mountainous district, and the Tara mountainous district. In these districts, the species was. found at the stations within the altitude range from about 480 to 1700 metres. The inhabitable water temperature ranges of the above-mentioned species found in the area surveyed are as follows : D. japonica (4.5～19.5℃) ; Ph. vivida (7.0～15.2℃). The geographical distribution range of Ph. vivida in Southwest Japan has been made rather clear. Up to the present, Ph. vivida was recorded only on the northern side of the demarcation line drawn from Mt. Tsurugi-yama, over Mt. Ishizuchi-yama to Mt. Onigajo-yama in Shikoku and from Mt. Sobo-san, over Mt. Ichibusa-yama, Mt. Shiraga-dake, Mt. Kunimi-dake, Mt. Sanpo-yama, Mts. Kuju-san, Mt. Yaho-gadake, Mt. Hagane-yama to Mts. Tara-gadake in Kyushu. The type of the vertical distribution in the area on the northern side of the above-mentioned demarcation line is shown as J-JV-V (the japonica-vivida area). That of the southern area is shown as J (the japonica area).

identifier:5

identifier:KJ00006968402