Trend of White-tailed Eagles Breeding in Japan During the Past Quarter-century
The number of breeding pairs of White-tailed Eagle (Haliaeetus albicilla) in Japan has increased yearly, from only ca. 30 pairs confirmed in the early 1990’s to more than 250 pairs in 2015. Accordingly, the breeding area has also expanded from only Hokkaido, the northrnmost island of Japan, into the...
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ftdoajarticles:oai:doaj.org/article:4ee89b6adb5a48048414f70ef7a92dad 2023-05-15T16:32:41+02:00 Trend of White-tailed Eagles Breeding in Japan During the Past Quarter-century Saiko Shiraki 2018-10-01T00:00:00Z https://doaj.org/article/4ee89b6adb5a48048414f70ef7a92dad EN RU eng rus LLC Sibecocenter http://rusraptors.ru/index.php/RC/article/view/135 https://doaj.org/toc/1814-0076 https://doaj.org/toc/1814-8654 1814-0076 1814-8654 https://doaj.org/article/4ee89b6adb5a48048414f70ef7a92dad Пернатые хищники и их охрана, Vol 0, Iss 1 (2018) birds of prey white-tailed sea eagle haliaeetus albicilla General. Including nature conservation geographical distribution QH1-199.5 Zoology QL1-991 article 2018 ftdoajarticles 2022-12-31T06:21:22Z The number of breeding pairs of White-tailed Eagle (Haliaeetus albicilla) in Japan has increased yearly, from only ca. 30 pairs confirmed in the early 1990’s to more than 250 pairs in 2015. Accordingly, the breeding area has also expanded from only Hokkaido, the northrnmost island of Japan, into the northen part of the main island. On the other hand, breeding success has declined from more than 80% in 1990’s to less than 60% in 2010’s. Additionally, nest tree locations of recent years have increasingly been closer to the road and human residential areas comaperd to before. This phenomenon might have occurred because of increasing population, shortage of large trees at suitable conditions for nesting, and habituation of the eagle to human activities. Meanwhile, many White-tailed Eagles and Steller’s Sea Eagles (H. pelagicus) currently distributed in Japan during the wintering period, probably after mid-1980’s, mainly eat aboundant food derived from human activities, such as fish discarded by fisheries. This situation might contribute to increase in the population of eagles with improving winter survival rate and productivity, however, also could have negative effects on the population of eagles, such as a increase in traffic accidents near the feeding sites with human activities, and on the balance of biological community. Thus, the restoration of suitable habitats with large trees for nesting and with natural food resources in winter is the most important component of any plan for White-tailed Eagle conservation in Japan. Article in Journal/Newspaper Haliaeetus albicilla White-tailed eagle Directory of Open Access Journals: DOAJ Articles Main Island ENVELOPE(-38.220,-38.220,-54.007,-54.007) |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Russian |
topic |
birds of prey white-tailed sea eagle haliaeetus albicilla General. Including nature conservation geographical distribution QH1-199.5 Zoology QL1-991 |
spellingShingle |
birds of prey white-tailed sea eagle haliaeetus albicilla General. Including nature conservation geographical distribution QH1-199.5 Zoology QL1-991 Saiko Shiraki Trend of White-tailed Eagles Breeding in Japan During the Past Quarter-century |
topic_facet |
birds of prey white-tailed sea eagle haliaeetus albicilla General. Including nature conservation geographical distribution QH1-199.5 Zoology QL1-991 |
description |
The number of breeding pairs of White-tailed Eagle (Haliaeetus albicilla) in Japan has increased yearly, from only ca. 30 pairs confirmed in the early 1990’s to more than 250 pairs in 2015. Accordingly, the breeding area has also expanded from only Hokkaido, the northrnmost island of Japan, into the northen part of the main island. On the other hand, breeding success has declined from more than 80% in 1990’s to less than 60% in 2010’s. Additionally, nest tree locations of recent years have increasingly been closer to the road and human residential areas comaperd to before. This phenomenon might have occurred because of increasing population, shortage of large trees at suitable conditions for nesting, and habituation of the eagle to human activities. Meanwhile, many White-tailed Eagles and Steller’s Sea Eagles (H. pelagicus) currently distributed in Japan during the wintering period, probably after mid-1980’s, mainly eat aboundant food derived from human activities, such as fish discarded by fisheries. This situation might contribute to increase in the population of eagles with improving winter survival rate and productivity, however, also could have negative effects on the population of eagles, such as a increase in traffic accidents near the feeding sites with human activities, and on the balance of biological community. Thus, the restoration of suitable habitats with large trees for nesting and with natural food resources in winter is the most important component of any plan for White-tailed Eagle conservation in Japan. |
format |
Article in Journal/Newspaper |
author |
Saiko Shiraki |
author_facet |
Saiko Shiraki |
author_sort |
Saiko Shiraki |
title |
Trend of White-tailed Eagles Breeding in Japan During the Past Quarter-century |
title_short |
Trend of White-tailed Eagles Breeding in Japan During the Past Quarter-century |
title_full |
Trend of White-tailed Eagles Breeding in Japan During the Past Quarter-century |
title_fullStr |
Trend of White-tailed Eagles Breeding in Japan During the Past Quarter-century |
title_full_unstemmed |
Trend of White-tailed Eagles Breeding in Japan During the Past Quarter-century |
title_sort |
trend of white-tailed eagles breeding in japan during the past quarter-century |
publisher |
LLC Sibecocenter |
publishDate |
2018 |
url |
https://doaj.org/article/4ee89b6adb5a48048414f70ef7a92dad |
long_lat |
ENVELOPE(-38.220,-38.220,-54.007,-54.007) |
geographic |
Main Island |
geographic_facet |
Main Island |
genre |
Haliaeetus albicilla White-tailed eagle |
genre_facet |
Haliaeetus albicilla White-tailed eagle |
op_source |
Пернатые хищники и их охрана, Vol 0, Iss 1 (2018) |
op_relation |
http://rusraptors.ru/index.php/RC/article/view/135 https://doaj.org/toc/1814-0076 https://doaj.org/toc/1814-8654 1814-0076 1814-8654 https://doaj.org/article/4ee89b6adb5a48048414f70ef7a92dad |
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1766022445060325376 |