淡路島, 小豆島, 剣山及び赤石山系の淡水産プラナリアの生態調査報告

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タイトル別名
  • REPORT ON THE ECOLOGICAL SURVEY OF FRESHWATER PLANARIANS IN AWAJISHIMA ISLAND AND SHODOSHIMA ISLAND ON THE INLAND SEA OF JAPAN, AND IN THE MT. TSURUGI DISTRICT AND THE AKAISHI MOUNTAIN RANGE, SHIKOKU
  • アワジシマ , ショウドシマ , ケンザン オヨビ アカイシ サンケイ ノ タンスイサン プラナリア ノ セイタイ チョウサ ホウコク

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In the present paper, the vertical distribution of freshwater planarians in two large islands in the Inland Sea of Japan (Awajishima Island and Shodoshima Island) and in the mountainous districts in Shikoku (Mt. Tsurugi and the Akaishi mountain range) is reported. The area surveyed is shown in Figure. 1. There are several low mountains in Awajishima Island (Mt. Yuzuriha 608 metres in altitude above sea level). Mt. Hoshigajo in Shodoshima Island is 817 metres in altitude above sea level. Mt. Tsurugi is the main peak of the eastern part of the Shikoku Mountains and is 1955 metres in altitude above sea level. The Akaishi mountain range is situated north-east of the Ishizuchi mountain range, the western part of the Shikoku Mountains. The main river systems in the area surveyed in Shikoku are the Yoshino, the Nakagawa, the Kokuryo and the Kamo. The surveys were made in 1957 (Shodoshima Island) and 1967 (other districts). In the area surveyed, Dugesia japonica ICHIKAWA et KAWAKATSU was common in the stations both on the plain and in the mountainous districts (below about 1460 metres altitude in the Mt. Tsurugi district). Phagocata vivida (IJIMA et KABURAKI) was found in the brooklet in Mt. Hoshigajo in Shodoshima Island. In the Mt. Tsurugi district, this species was found at the stations of cold-water within the altitude range from about 1220 to 1800 metres. This species was also found at the stations within the altitude range from about 1080 to 1620 metres in the Akaishi mountain range. The type of the vertical distribution in Shikoku is shown as J-JV-V (J : D. japonica ; V : Ph. vivida). Several fragmental records on the distributional ecology of freshwater planarians in Shikoku are described (Fig. 1). Recently, D. japonica was collected from a spring in Oshima Island in the Inland Sea coll. Mr. Y. MURAKAMI) as well as from a shallow stream in Ryo-no-iwaya Cave in Anan City, Tokushima Prefecture (coll. Messrs. Y. MORIMOTO and Y. MURAKAMI). The cave specimens examined show no morphological peculiarity.

収録刊行物

  • 日本生態学会誌

    日本生態学会誌 18 (5), 199-204, 1968

    一般社団法人 日本生態学会

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