つがい形成にともなうオオヨシキリ雄の囀り頻度と行動の変化

• 江崎 保男

  京都大学理学部動物学教室

書誌事項

タイトル別名

• Male Time Budgets and Recovery of Singing Rate after Pairing in Polygamous Great Reed Warblers

抄録

1)Data on time budgets, especially on the singing rate of male Great Reed Warblers were collected during the 1977 breeding season at Lake Biwa, Shiga Pref. in central Honshu.<br>2) Although the singing rate dropped dramatically with pairing, it recovered in the egg period of the mate and males during this period allocated time similarly as before pairing. Poly-gamous males acquired additional mates in this stage and it supports the hypothesis that song has a function to attract females.<br>3) Males just after pairing spent 40% of time consorting with their new mates. Consorting time declined sharply with the progress of nesting stage and a negative rank correlation was detected between the time spent consorting and singing before hatching of eggs. Care of the mate seemed to suppress the singing activity of males.<br>4) Males with nestlings or fledglings brought food to them and they sang little. Food collection for young deprived much potential singing time of males in this period.<br>5) Monogamous males during the egg period of the primary female sang as actively as polygamous males at the top of the vegetation, although they did not succeed in acquiring addi-tional mates. Bachelor males sang as many as others, but their songs were probably less effec-tive because some of them were uttered under the vegetation.

収録刊行物

• 日本鳥学会誌

  日本鳥学会誌 36 (1), 1-11, 1987

  日本鳥学会

詳細情報

• CRID: 1390001204481687424
• NII論文ID: 130003424372
• NII論文ID: 30037479619
• NII書誌ID: AN10314294
• DOI: 10.3838/jjo.36.1
• ISSN: 18819710
• ISSN: 0913400X
• 本文言語コード: en
• 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