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Title |
Associate Professor |
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Laboratory Address |
北海道網走市八坂196 |
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Laboratory Phone number |
0152-48-3828 |
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Laboratory Fax number |
0152-48-3828 |
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External Link |
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SHIRAKI Saiko Associate Professor |
Employment Record in Research 【 display / non-display 】
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Tokyo University of Agriculture Faculty of Bio-Industry Department of Bio-production Lecturer
2006.04 - 2014.03
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Tokyo University of Agriculture Faculty of Bio-Industry Department of Bio-production Associate Professor
2014.04 - 2018.03
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Tokyo University of Agriculture Faculty of Bio-Industry Department of Northern Biosphere Agriculture Associate Professor
2018.04
Papers 【 display / non-display 】
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Flight behavior of large bird species around a wind farm in the eastern Okhotsk coast of Hokkaido and the effects of wind turbines on the birds ―Hokkaido Bird Conservation Research Group―
SHIRAKI Saiko, KATO Mio, OKADA Miu, KATO Yohei, OCHI Mizuki
Annual Report of Pro Natura Foundation Japan 35 ( 0 ) 213 - 221 2026.08
Authorship：Lead author, Corresponding author Language：Japanese Publisher：Pro Natura Foundation Japan
<p>We investigated the flight behavior of large birds around a wind farm constructed on a hill in eastern Okhotsk, Hokkaido, and examined the possibility of adverse impacts on the birds. A one-year fixed-point observation survey revealed that our target birds, geese, swans, and sea eagles most frequently flew at altitudes within wind turbine rotor swept ranges, with some individuals observed flying close to the turbines. Sea eagles frequently engaged in circling and ascending flights near the turbines. A preliminary estimation of the annual number of birds colliding with wind turbines indicated the possibility of the collision for all target birds and certain wind turbines showed extremely high risk of collision. It was also considered that the energy consumption required to detour around large wind turbines may have a particularly large impact on geese and swans.</p>
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Natal Dispersal and Seasonal Migration of White-Tailed Sea Eagles in Khabarovsk Krai (Russia) and Hokkaido (Japan) Reviewed International coauthorship
Saiko Shiraki, Vladimir Pronkevich, Atsushi Okuda
Raptors Conservation Special Issue 2 73 - 74 2023.01
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (international conference proceedings)
White-Tailed Sea Eagles (Haliaeetus albicilla) become sexually mature at 5–6 years and the conditions of habitats and flight paths for local and seasonal movements in the nomadic period between post-fledging and breeding territory occupation are important in terms of population demographic relevance. The purpose of this study is to elucidate post-fledging movements, seasonal migrations, and habitats of immature White-Tailed Sea Eagles by GPS tracking. GPS transmitters were attached to nestlings of White-Tailed Sea Eagles at the middle basin of Amur River (around Slavyanka; 49°50'N, 136°76'E) and Lake Chukchagir (51°59'N, 136°36'E) in Khabarovsk Krai, Russia, and at Abashiri (44°1'N, 144°16'E) in eastern Hokkaido, Japan, in the breeding seasons of 2017–2022. Habitats used by GPS-tagged immatures were investigated with satellite images and field observations. The dispersion of post-fledging sea eagles from their natal nests occurred in autumn (September–October) for both sites in Khabarovsk and Abashiri. The first destinations in dispersal movements were river tributaries or lakes in floodplains in Khabarovsk (n=4) and rivers in Abashiri (n=2). Start timing and the first destination of emigration from natal sites for both breeding areas was considered to be related with upstreaming of salmonid fish for spawning. All of three juveniles fledged in Khabarovsk and tracked at least until their first winter wintered at the coastal area of Primorsky Krai, Russia, approximately 800–1,000 km south of their birthplaces, however, one juvenile took a different migration route to the wintering ground than the other two. Besides, two eagles tracked for more than two years after their birth in Khabarovsk showed the same migration routes in spring and autumn, and in the first year and subsequent years, respectively. Meanwhile, juvenile eagles fledged in Abashiri (n=2) moved to the places up to about 150 km south of their natal sites in their first winter, despite the fact that some major wintering grounds for sea eagles exist around their birthplace. Previous study reported that some colour-ringed immature White-Tailed Sea Eagles fledged at nests in Nemuro (43°19'N, 145°35'E), located approximately 100 km southeast direction of Abashiri, had been observed around their birthplaces in winter (Shiraki, 2002). Not only food availability but also genetic factor may be involved in determination of the wintering area. White-Tailed Sea Eagles over one year old from the nests in Khabarovsk (n=2) and in Abashiri (n=1) visited the vicinity of their natal sites during spring and summer. As White-Tailed Sea Eagles are known to have a tendency to nest in the natal area, young eagles might assess breeding opportunities around their natal sites. Immature White-Tailed Sea Eagles with GPS mostly stayed at habitats with food supplied from human activities, such as small fish discarded in fishery, marine waste, Sika Deer (Cervus nippon) residue left behind after hunting or killed in collisions with vehicles or trains, during winter in both of Primorsky and Hokkaido.
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北海道の山岳地域における繁殖期のヒバリの生息状況 Reviewed
白木 彩子
Strix 38 39 - 50 2022
Authorship：Lead author, Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：日本野鳥の会
近年，北海道の山岳域で確認されているヒバリの目撃記録を整理し，生息環境の特徴などについて分析した。
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GPS tracking of white-tailed eagles to clear the environmental determinants of migratory routes and stopover habitats for an appropriate site selection of wind turbines ―Hokkaido Bird Conservation Research Group― International coauthorship
SHIRAKI Saiko, PRONKEVICH Vladimir, OKUDA Atsushi
Annual Report of Pro Natura Foundation Japan 28 ( 0 ) 123 - 130 2020.01
Authorship：Lead author, Corresponding author Language：Japanese Publishing type：Research paper (bulletin of university, research institution) Publisher：Pro Natura Foundation Japan
<p>Fifty-two white-tailed eagles have been killed by collisions of wind turbines in Hokkaido with the increase of wind farms. Furthermore, many projects of wind farms are planned and the environment assessments are underway in Japan. The final goal of this study is to understand important flyways and stopover or wintering habitats of whitetailed eagles in far east of Russia and in Japan. </p><p>As the first step of this study, we captured two and four nestlings at the nest sites of middle basin of Amur river in 2017 summer and at Lake Chukchagirskoye in lower Amur in 2018 summer, respectively. GPS transmitters were equipped to these nestlings and telemetry trackings were carried out to identify their migration routes and their habitats after their fledging.</p><p>One eagle captured in 2017 had been tracked till 8 January 2018 and this eagle wintered near a dumping ground probably with fish waste in the coast of primorye. This eagle also stayed at three stopover sites on the way from the natal site to wintering site and all sites were river basins. The eagle did not migrate to Japan, but some important data for conservation of this species in Japan and in Russia were acquired. The four eagles with transmitters equipped in 2018 summer have been currently tracked.</p>
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Habitat selection of Skylarks during the breeding season on the volcanic slope of Mt. Tarumae Reviewed International journal
ITO Yohei, MATSUI Shin, SHIRAKI Saiko, UEDA Keisuke
ORNITHOLOGICAL SCIENCE 19 ( 2 ) 167 - 175 2020
Language：English Publishing type：Research paper (scientific journal) Publisher：The Ornithological Society of Japan
<p>The Eurasian Skylark, <i>Alauda arvensis</i>, is a passerine bird that mainly breeds in open habitats, such as lowland grasslands and farmlands. However, recent studies have shown that they form breeding territories on volcanic and alpine slopes in central/northern Japan. During the 2018 breeding season, we investigated the density and habitat selection of Skylarks on the volcanic slopes above timber line, of Mt. Tarumae, Hokkaido. Our results showed that there were 27 Skylark territories in the study area, with a density of 7.26 territories per square kilometer. This spatial arrangement was dense around the eastern slope. Skylarks favored habitats with a low vegetation height. The quantity of short plant species, i.e. <i>Carex oxyandra </i>and <i>Arcterica nana</i> was larger in territories than in randomly selected points. <i>C</i>.<i> oxyandra</i> plays important roles not only in forming low vegetation, but also in available and limited nest material in their breeding territories on the volcanic slopes. These results suggest that Skylarks occupy areas of low vegetation with <i>C. oxyandra</i>, as there are limited resources available for nest materials within the breeding territories that are on the volcanic slope above a timber line.</p>
Books and Other Publications 【 display / non-display 】
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風力発電用風車への衝突事故とその回避 樋口広芳編 日本のタカ学
白木彩子（ Role： Joint author , 300－323）
東京大学出版会 2013.12
Total pages：354 Responsible for pages：300－323 Language：Japanese Book type：Scholarly book
風力発電用風車への鳥類の衝突事故の現状や衝突事故の発生要因，事故の回避策について国内外の報告をとりまとめて論述したほか，著者らの構築した風車衝突事故による死亡率の推定モデルについて概説した。
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北海道におけるオジロワシの繁殖の現状と保全上の課題 桜井泰憲・大島慶一郎・大泰司紀之編著 オホーツクの生態系とその保全
白木彩子（ Role： Joint author , 319－331）
北海道大学出版会 2013.02
Total pages：484 Responsible for pages：319－331 Language：Japanese Book type：Scholarly book
北海道で繁殖するオジロワシの動態と保全上の課題について論述した。
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図説 日本の絶滅危惧種 動物編－100種から見る日本の自然 (監修) 宮下 直・西廣 淳
白木彩子（ Role： Contributor , 59 オジロワシ 60 オオワシ）
朝倉書店 2026.10
Language：Japanese Book type：General book, introductory book for general audience
オジロワシ(59)とオオワシ(60)の生息現状，保全上の課題や取り組み等について概説
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第6章 オオワシとオジロワシ ―陸と海の生態系の豊かさの指標. 北方四島の動物たち. 大泰司紀之・小林 万里（編）
白木彩子（ Role： Contributor , 第6章 オオワシとオジロワシ ―陸と海の生態系の豊かさの指標）
山と渓谷社 2026.03
Total pages：240 Language：Japanese Book type：General book, introductory book for general audience
国後，択捉島におけるオジロワシ，オオワシの生息状況調査の結果や北海道とのつながりのほか，国後島や知床半島における再生可能エネルギー事業についても概説
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オジロワシ. 環境省編 Red Data Book 2024.
白木彩子（ Role： Contributor , 152－153）
2014.09
Total pages：250 Responsible for pages：152－153 Language：Japanese Book type：Textbook, survey, introduction
Misc 【 display / non-display 】
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オジロワシの生息実態と保全の方向性 (野生動物保護管理の最前線① 猛禽類特集). Wildlife Forum 14(25)：6-8.
白木 彩子
野生動物保護学会 2009.10
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (other)
希少猛禽類オジロワシの生息現状と保全対策について紹介した。
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オジロワシとオオワシの越冬生態.
白木 彩子
BIRDER :21, 20-25. 2007.12
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (other) Publisher：文一総合出版, 東京.
オジロワシとオオワシの越冬生態
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風力発電施設と鳥類の保全
白木 彩子
北海道自然保護協会会誌 北海道の自然 No.46：56-60 2007.03
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (other)
準備中
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風力発電用風車の問題
白木 彩子
Faula14 : 26-27 2006.12
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (other)
風力発電用風車の野鳥に対する問題
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「ヘリコプターおよび道路センサスによる海ワシ類モニタリング手法の検討」
白木彩子・坂部皆子・田沢道広・増田泰・今井英夫
知床博物館研究報告27 2006.03
Authorship：Lead author Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (other)
準備中
Presentations 【 display / non-display 】
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2026年3月8日（日）にで、オジロワシとオオワシの生態と保全を学ぶフォーラム「北海道の空を舞う美しいワシたち」 Invited
白木彩子
オジロワシとオオワシの生態と保全を学ぶフォーラム「北海道の空を舞う美しいワシたち」 2026.03 NPO法人Envision 環境保全事務所
Event date： 2026.03
Language：Japanese Presentation type：Symposium, workshop panel (nominated)
Venue：札幌市教育文化会館
一般市民向けに，ワークショップの基調講演としてオジロワシの生息状況や保全上の課題など総括的な解説を行った。
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オオワシの生態と保全の取り組み Invited
白木彩子
オオワシ本州サミット・講演会 2026.02 オオワシサミット・講演会 実行委員会
Event date： 2026.02
Language：Japanese Presentation type：Public lecture, seminar, tutorial, course, or other speech
Venue：吉舎交流拠点施設よっしゃ吉舎ホール（広島県三次市吉舎町吉舎371）
北海道やロシアにおける調査の結果や北海道における問題や保全の取り組みについて紹介し，本州におけるオオワシ渡来地における今後のオオワシ保全に向けた提案を行った。
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Natal dispersal patterns of White-tailed Sea-eagles and the differences between local natal areas in Hokkaido, Japan International conference
Saiko Shiraki , Daichi Waga , Hiroshi Yonekawa
RAPTOR RESEARCH FOUNDATION 2025 CONFERENCE 2025.10 RAPTOR RESEARCH FOUNDATION
Event date： 2025.10
Language：English Presentation type：Poster presentation
Venue：SAN JOSE, COSTA RICA Country：Costa Rica
Hokkaido is one of the major wintering grounds for
migratory White-tailed Sea-eagles (Haliaeetus albicilla)
from Russian Far East and is also a breeding area to
residents of this species. A genetic differentiation between
the northern and eastern areas, which are the main
breeding grounds for Hokkaido resident population, have
been suggested in previous study. The aims of this study are
to obtain basic information on the natal dispersal of this
eagle, and to find out differences in the dispersal patterns
between local natal areas, also considering relation to
genetic structure of breeding population in Hokkaido.
Three nestlings (hereinafter called NJs) in the northern
area, two (EJs) in the eastern area and one (BJ) at a nest
near the border of both areas were equipped with GPS
transmitters in 2021-2024 and have been tracked. NJs and
BJ mostly moved along coast in the north-south direction,
while EJs moved throughout the eastern part, including
inland, during their first year after birth. Major wintering
grounds did not overlap between NJs and EJs. Latitudes of
the southern limit in the range of each yearling eagle were
43°26’N–43°58’N for NJs and BJ, and 42°42’N–42°55’N for Ejs.
Additionally, the seasonal movements and habitats in the
second and subsequent years for each eagle were almost
the same to those of the first year. These results suggest
that dispersal movement patterns may differ between local
natal areas and may also be related to genetic structure in
Hokkaido breeding population. -
Natal Dispersal and Seasonal Migration of White-Tailed Sea Eagles in Khabarovsk Krai (Russia) and Hokkaido (Japan) International coauthorship International conference
Saiko Shiraki，Vladimir Pronkevich，Atsushi Okuda
Third International Scientific and Practical Conference «Eagles of the Palearctic: Study and Conservation» 2023.09 Russian raptor research and conservation network
Event date： 2023.09
Language：English Presentation type：Poster presentation
Venue：Almaty, Kazakhstan Country：Kazakhstan
White-Tailed Sea Eagles (Haliaeetus albicilla) become sexually mature at 5–6 years and the conditions of habitats and flight paths for local and seasonal movements in the nomadic period between post-fledging and breeding territory occupation are important in terms of population demographic relevance. The purpose of this study is to elucidate post-fledging movements, seasonal migrations, and habitats of immature White-Tailed Sea Eagles by GPS tracking.
GPS transmitters were attached to nestlings of White-Tailed Sea Eagles at the middle basin of Amur River (around Slavyanka; 49°50'N, 136°76'E) and Lake Chukchagir (51°59'N, 136°36'E) in Khabarovsk Krai, Russia, and at Abashiri (44°1'N, 144°16'E) in eastern Hokkaido, Japan, in the breeding seasons of 2017– 2022. Habitats used by GPS-tagged immatures were investigated with satellite images and field observations.
The dispersion of post-fledging sea eagles from their natal nests occurred in autumn (September–October) for both sites in Khabarovsk and Abashiri. The first destinations in dispersal movements were river tributaries or lakes in floodplains in Khabarovsk (n=4) and rivers in Abashiri (n=2). Start timing and the first destination of emigration from natal sites for both breeding areas was considered to be related with upstreaming of salmonid fish for spawning.
All of three juveniles fledged in Khabarovsk and tracked at least until their first winter wintered at the coastal area of Primorsky Krai, Russia, approximately 800–1,000 km south of their birthplaces, however, one juvenile took a different migration route to the wintering ground than the other two. Besides, two eagles tracked for more than two years after their birth in Khabarovsk showed the same migration routes in spring and autumn, and in the first year and subsequent years, respectively. Meanwhile, juvenile eagles fledged in Abashiri (n=2) moved to the places up to about 150 km south of their natal sites in their first winter, despite the fact that some major wintering grounds for sea eagles exist around their birthplace. Previous study reported that some colour-ringed immature White-Tailed Sea Eagles fledged at nests in Nemuro (43°19'N, 145°35'E), located approximately 100 km southeast direction of Abashiri, had been observed around their birthplaces in winter (Shiraki, 2002). Not only food availability but also genetic factor may be involved in determination of the wintering area.
White-Tailed Sea Eagles over one year old from the nests in Khabarovsk (n=2) and in Abashiri (n=1) visited the vicinity of their natal sites during spring and summer. As White-Tailed Sea Eagles are known to have a tendency to nest in the natal area, young eagles might assess breeding opportunities around their natal sites.
Immature White-Tailed Sea Eagles with GPS mostly stayed at habitats with food supplied from human activities, such as small fish discarded in fishery, marine waste, Sika Deer (Cervus nippon) residue left behind after hunting or killed in collisions with vehicles or trains, during winter in both of Primorsky and Hokkaido. -
Genetic structure of skylark Alauda arvensis population breeding in Japan. International conference
Shiraki, S, Kikkawa, Y, Ueda, K, Surmach, S.
The 5th EAFES International Congress. 2012.03 EAFES
Event date： 2012.03
Language：English Presentation type：Poster presentation
Venue：Ryukoku University, Otsu, Shiga, Japan
Media Coverage 【 display / non-display 】
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オオワシの安定的な存続、人の活動が鍵 白木准教授が講演 Newspaper, magazine
中国新聞 2026.02
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＜提言 知床の未来 世界自然遺産登録20年＞⑤東京農業大学准教授・白木彩子さん 生態系の劣化、人間が招いた Newspaper, magazine
北海道新聞 2025.01
Author：Other
Basic stance of industry-university cooperation 【 display / non-display 】
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野生生物や自然環境の保全、生物多様性の維持・向上に貢献し得る経済活動や技術開発等については、生物（とくに鳥類）保全の立場からの協力・連携が可能