Sexual size dimorphism in Streaked Shearwaters Calonectris leucomelas

• Shirai Masaki

  Graduate School of Environmental Studies, Nagoya University

• Niizuma Yasuaki

  Laboratory of Environmental Zoology, Faculty of Agriculture, Meijo University

• Tsuchiya Kenji

  Laboratory of Environmental Zoology, Faculty of Agriculture, Meijo University

• Yamamoto Maki

  Department of Bioengineering, Nagaoka University of Technology

• Oka Nariko

  Yamashina Institute for Ornithology

書誌事項

タイトル別名

• Sexual size dimorphism in Streaked Shearwaters <i>Calonectris leucomelas</i>

抄録

We collected fresh Streaked Shearwater Calonectris leucomelas carcasses and describe sex differences in external measurements following sex identification using reproductive organs. Males had significantly deeper bills, longer bills, longer heads, longer tarsi, greater wingspans and greater wing areas than females, but overall wing and tail lengths and aspect ratios did not differ between sexes. Streaked Shearwaters showed a greater degree of sexual dimorphism in bill size than other Puffinus species. Comparing the wing loadings of male and female Streaked Shearwaters, the mass increase required for females to have the same wing loading as males is 0.036 kg. Females could feed to increase their body mass during a foraging trip to have similar wing loading to males.

収録刊行物

• ORNITHOLOGICAL SCIENCE

  ORNITHOLOGICAL SCIENCE 12 (1), 57-62, 2013

  日本鳥学会

キーワード

• External measurements
• Sexual difference
• Streaked Shearwater
• Wing loading

詳細情報

• CRID: 1390001205189932160
• NII論文ID: 130004934965
• DOI: 10.2326/osj.12.57
• ISSN: 13470558
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可