著者

藤巻 裕蔵

出版者

日本鳥学会

雑誌

鳥 (ISSN:00409480)

巻号頁・発行日

vol.16, no.78, pp.387-398, 1961

被引用文献数

1

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Observatins of sea-bird colonies made in May and July, 1959, and June and July, 1960 on Moyururi Island off southeastern Hokkaido, are reported. <br>The island measures 3km. of costal lengh with elevation of 30m. from the sea level. It is a bare and uninhabited island. <br>Twenty-six species of birds including 12 species of sea birds were recorded. Of the sea birds, 7 species breed on this island (Table 1). There were about 120 individuals of <i>Phalacrocorax capillatus</i>, about 70 <i>P. urile</i>, about 400 <i>Larus schistisagus</i>, about 200 <i>L. crassirostris</i>, 29 <i>Uria aalge</i>, about 160 <i>Cepphus carbo</i> and about 230 <i>Lunda cirrhata. Cerorhinca monocerata</i> could not be encountered because of the nocturnal habit. Breeding sea birds had eggs during May and June, and young during June and July.<br>The colonies of <i>Phalacrocorax urile, Larus schistisagus</i> and <i>Lunda cirrhata</i> on this island form the southern limit of their breeding range. In <i>Uria aalge</i> Ko-jima in the Japan Sea side and Moyururi Is. in the Pacific side, are the southern limis. Therefore Moyururi Island is very important ornithogeographically.