1 0 0 0 OA ニホンリスの食物と貯食行動
- 著者
- 加藤 順
- 出版者
- The Ecological Society of Japan
- 雑誌
- 日本生態学会誌 (ISSN:00215007)
- 巻号頁・発行日
- vol.35, no.1, pp.13-20, 1985-03-30 (Released:2017-05-23)
- 被引用文献数
- 12
KATO, Jun (Dept. Biol., Fac. Sci., Osaka City Univ., Osaka). 1985. Food and hoarding behavior of Japanese squirrels. Jap. J. Ecol., 35 : 13-20. The food habits of Japanese squirrels were studied in a pine-deciduous mixed forest for four years. Out of a total of 699 sightings, 698 (99.9%) were of plant matter. One sighting of animal matter was the corpse of a squirrel. Among the species of plants consumed, 22 (16 trees, four vines and two grasses) were identified. The main food was walnut cores, Japanese red pine seeds and larch seeds, which composed 68.1% of the total sightings. Various portions of plants (seeds, nuts, fruits, buds, leaves, flowers, bark and sap) were utilized in different seasons. Some food was hoarded in tree folks and under the ground as scattered hoarding, a behavior which was observed mainly in autumn. Walnuts and pine cones were hoarded both arboreally and underground, but mushrooms were only arboreally hoarded. Since underground hoarded food was eaten mainly in the next spring, walnut hoarding in autumn was suggested to be important in the winter and spring life of the squirrels.
1 0 0 0 OA 札幌およびその近郊におけるシワクシケアリの2型について
- 著者
- 水谷 章
- 出版者
- The Ecological Society of Japan
- 雑誌
- 日本生態学会誌 (ISSN:00215007)
- 巻号頁・発行日
- vol.31, no.2, pp.131-137, 1981-06-30 (Released:2017-04-12)
- 被引用文献数
- 1
Based upon ecological aspects, Myrmica ruginodis Nylander from Sapporo and its vicinitv is divided into two forms, one occurring in riverside areas and the other in woodland. The riverside form is polygynous and produces fewer new queens, which suggests colony reproduction by fission and the internest movement of workers. The woodland form is generally monogynous, produces many queens, and conducts colony reproduction by solitary queens.
1 0 0 0 OA 同胞種オナジショウジョウバエとキイロショウジョウパエの共存要因
- 著者
- 河西 正興 渡辺 隆夫
- 出版者
- The Ecological Society of Japan
- 雑誌
- 日本生態学会誌 (ISSN:00215007)
- 巻号頁・発行日
- vol.27, no.4, pp.279-283, 1977-12-30 (Released:2017-04-11)
The two sibling Drosophila species, D. simulans and D. melanogaster, are believed to coexist in nature sharing food and space. However, D. simulans prefers a semi-natural environment while D. melanogaster lives near human habitation. A weak seasonal isolation was observed between the two species, i.e., a unimodal population distribution peaking in August was found for D. melanogaster while a bimodal population distribution peaking in July and September was found for D. simulans.