手賀沼におけるオオバンの繁殖生態

DOI

書誌事項

タイトル別名
  • Breeding Biology of the Coot Fulica atra on Lake Teganuma, Chiba.

抄録

The breeding ecology of the Coot Fulica atra was studied on Lake Teganuma, Chiba, central Japan, from April to October 1990. Nests were built in 2-7 days, and used for copulation and egg laying. The egg laying period ranged from early April to mid-July, peaking in May. One egg was laid per day and clutch size varied from 3-8 eggs, with an average of 5.2. Eggs weighed between 30 and 40g, averaging 34.9g. The mean size of 120 eggs from 23 nests was 52.0×35.5mm. Most nests (86%) were placed in Typha angustata, and the other nests (14%) in Zizania latifolia. Both males and females incubated eggs. The interval of incubation was 51 minutes on average. The incubation period ranged between 21 and 25 days. The second nest was constructed once the eggs had hatched. Of a total of 126 eggs laid in this study area, 32% hatched, with only 12% of the eggs remaining after two weeks.

収録刊行物

キーワード

詳細情報 詳細情報について

  • CRID
    1390282680016418560
  • NII論文ID
    130003572785
  • DOI
    10.3312/jyio1952.26.47
  • ISSN
    18833659
    00440183
  • 本文言語コード
    ja
  • データソース種別
    • JaLC
    • Crossref
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

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