Age of First Primary Moult in the Red-Crowned Crane Grus japonensis

IF 0.5 4区生物学 Q4 ORNITHOLOGY

Ornithological Science Pub Date : 2020-07-24 DOI:10.2326/osj.19.223

Y. Masatomi

引用次数: 0

Abstract

Abstract The Red-crowned Crane Grus japonensis population of Hokkaido, Japan, has increased to over 1,600 individuals since near extinction in the late 19th and early 20th centuries. Adults and subadults can be distinguished by visible characteristics of their remiges; adults have pure white primaries whereas subadult birds have black primary tips and upper primary wing coverts. Banded individuals hatched during 2015–2017 were examined in detail using photographs and videos and it was found that the subadult characteristics of the remiges disappeared in individuals older than two years.

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日本丹顶鹤第一初级丘的年龄

摘要日本北海道的丹顶鹤种群自19世纪末20世纪初濒临灭绝以来，已增加到1600多只。成年人和亚成年人可以通过其谱系的明显特征来区分；成鸟有纯白的初级，而亚成鸟有黑色的初级尖端和上部初级翅盖。使用照片和视频对2015-2017年孵化的带状个体进行了详细检查，发现两年以上的个体的亚成年特征消失了。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ornithological Science ORNITHOLOGY-

CiteScore

1.20

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Ornithological Science publishes reviews, original articles, short communications and comments covering all aspects of ornithology. Manuscripts are judged on the basis of their contribution of original data and ideas or interpretation. All articles are peer-reviewed by at least two researchers expert in the field of the submitted paper. Manuscript are edited where necessary for clarify and economy. Ornithological Science aims to publish as rapidly as is consistent with the requirements of peer-review and normal publishing constraints.