ニホンヒキガエルBufo japonicus japonicusの自然誌的研究 : VI. 成長にともなう移動と定着
1985 年 35 巻 2 号 p. 263-271
詳細
1985 年 35 巻 2 号 p. 263-271
OKUNO, Ryonosuke (Dept. Biol., Fac. Sci., Kanazawa Univ., Ishikawa). 1985. Studies on the natural history of the Japanese toad, Bufo japonicus japonicus. VI. Movements of the young toad. Jap. J. Ecol., 35 : 263-271. Movements of the young Japanese toad, Bufo japonicus japonicus, were studied by the marking and recapture method. During the spring season of age 1,the mean distance between the point of capture and recapture was 44.2m (9-140m) ; during the autumn of age 1.5 years the mean distance was 29.6m (6-75m) ; and during the spring of age 2 the mean distance was 32.7m (7-82m). Mean movement during ages 1 and 2 was 51.4m (3-140m), and 12.8% of the toads were observed to move over 100m. Young toads moved generally from the neighborhood of the breeding pond to the peripheral zone of distribution area, and established their parmanent residences at 2.5 or 3 years of age.
