Evaluation of bill furrows as age indicator in the Tufted Puffin Lunda cirrhata
Tufted Puffins (Lunda cirrhata) were divided into six stages (F(Y), F(0)-F(4)) according to the number of bill furrows formed in the reddish outer part of the upper bill. To clarify the morphological difference between sexes and among stages, eleven morphological measurements of the bills were made....
Main Authors: | , |
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Format: | Report |
Language: | English |
Published: |
Research Institute of North Pasific Fisheries, Faculty of Fisheries, Hokkaido University/Research Institute of North Pasific Fisheries, Faculty of Fisheries, Hokkaido University
1986
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Online Access: | https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2044 http://id.nii.ac.jp/1291/00002044/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2044&item_no=1&attribute_id=18&file_no=1 |