Long-term Monitoring of the Steller’s Sea Eagles at the Northern Sea of Okhotsk: What Did We Learn?
For the past 27 years we have monitored the numbers and breeding output of one of the undisputed endemics of the Russian Federation, Steller’s Sea Eagles (Haliaeetus pelagicus) along the coast and major rivers of the Magadan District, North East Siberia, Russia. Every year we checked at least 40 ter...
Main Authors: | , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English Russian |
Published: |
LLC Sibecocenter
2018
|
Subjects: | |
Online Access: | https://doaj.org/article/5e686db097fe4b81bf09cb48464f3378 |
id |
ftdoajarticles:oai:doaj.org/article:5e686db097fe4b81bf09cb48464f3378 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:5e686db097fe4b81bf09cb48464f3378 2023-05-15T18:18:49+02:00 Long-term Monitoring of the Steller’s Sea Eagles at the Northern Sea of Okhotsk: What Did We Learn? Eugene R. Potapov Irina G. Utekhina Michael J. McGrady 2018-10-01T00:00:00Z https://doaj.org/article/5e686db097fe4b81bf09cb48464f3378 EN RU eng rus LLC Sibecocenter http://rusraptors.ru/index.php/RC/article/view/130 https://doaj.org/toc/1814-0076 https://doaj.org/toc/1814-8654 1814-0076 1814-8654 https://doaj.org/article/5e686db097fe4b81bf09cb48464f3378 Пернатые хищники и их охрана, Vol 0, Iss 1 (2018) birds of prey steller’s sea eagles haliaeetus pelagicus General. Including nature conservation geographical distribution QH1-199.5 Zoology QL1-991 article 2018 ftdoajarticles 2022-12-31T13:25:18Z For the past 27 years we have monitored the numbers and breeding output of one of the undisputed endemics of the Russian Federation, Steller’s Sea Eagles (Haliaeetus pelagicus) along the coast and major rivers of the Magadan District, North East Siberia, Russia. Every year we checked at least 40 territories in constant ‘model’ study areas located near Magadan, amassing data from 600 potential breeding attempts. The number of chicks fledged per successful pair has declined over the past 10 years, and has started to decline in a few localities on the coast. The declining breeding rate of Steller’s Sea Eagles nesting on rivers is associated with the frequency and severity of spring floods, as well as presence of ice-free channels in early spring. In the past decade, overall snow deposits in river systems have increased, producing severe and lengthy floods. Such floods impede successful hunting by the eagles, which reduces breeding output. The the past few years the sea coast sub-population demonstrated a very low breeding output in the portion of the coast with little or no ice cover in spring. Since this portion of the Sea of Okhotsk remain ice free in the past few winters, some portion of the coast demonstrated zero breeding output in contrast to high breeding output with normal ice cover in winter. We present a statistical model that predicts the breeding output of Steller’s Sea Eagles based on snow accumulation prior to the breeding season for the riverine nests and on early spring sea-ice density for the coastal nests, and explain mechanism of formation of the changing ice and snow conditions based on the changes in climate. Article in Journal/Newspaper Sea ice Siberia Directory of Open Access Journals: DOAJ Articles Magadan ENVELOPE(150.803,150.803,59.564,59.564) Okhotsk |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Russian |
topic |
birds of prey steller’s sea eagles haliaeetus pelagicus General. Including nature conservation geographical distribution QH1-199.5 Zoology QL1-991 |
spellingShingle |
birds of prey steller’s sea eagles haliaeetus pelagicus General. Including nature conservation geographical distribution QH1-199.5 Zoology QL1-991 Eugene R. Potapov Irina G. Utekhina Michael J. McGrady Long-term Monitoring of the Steller’s Sea Eagles at the Northern Sea of Okhotsk: What Did We Learn? |
topic_facet |
birds of prey steller’s sea eagles haliaeetus pelagicus General. Including nature conservation geographical distribution QH1-199.5 Zoology QL1-991 |
description |
For the past 27 years we have monitored the numbers and breeding output of one of the undisputed endemics of the Russian Federation, Steller’s Sea Eagles (Haliaeetus pelagicus) along the coast and major rivers of the Magadan District, North East Siberia, Russia. Every year we checked at least 40 territories in constant ‘model’ study areas located near Magadan, amassing data from 600 potential breeding attempts. The number of chicks fledged per successful pair has declined over the past 10 years, and has started to decline in a few localities on the coast. The declining breeding rate of Steller’s Sea Eagles nesting on rivers is associated with the frequency and severity of spring floods, as well as presence of ice-free channels in early spring. In the past decade, overall snow deposits in river systems have increased, producing severe and lengthy floods. Such floods impede successful hunting by the eagles, which reduces breeding output. The the past few years the sea coast sub-population demonstrated a very low breeding output in the portion of the coast with little or no ice cover in spring. Since this portion of the Sea of Okhotsk remain ice free in the past few winters, some portion of the coast demonstrated zero breeding output in contrast to high breeding output with normal ice cover in winter. We present a statistical model that predicts the breeding output of Steller’s Sea Eagles based on snow accumulation prior to the breeding season for the riverine nests and on early spring sea-ice density for the coastal nests, and explain mechanism of formation of the changing ice and snow conditions based on the changes in climate. |
format |
Article in Journal/Newspaper |
author |
Eugene R. Potapov Irina G. Utekhina Michael J. McGrady |
author_facet |
Eugene R. Potapov Irina G. Utekhina Michael J. McGrady |
author_sort |
Eugene R. Potapov |
title |
Long-term Monitoring of the Steller’s Sea Eagles at the Northern Sea of Okhotsk: What Did We Learn? |
title_short |
Long-term Monitoring of the Steller’s Sea Eagles at the Northern Sea of Okhotsk: What Did We Learn? |
title_full |
Long-term Monitoring of the Steller’s Sea Eagles at the Northern Sea of Okhotsk: What Did We Learn? |
title_fullStr |
Long-term Monitoring of the Steller’s Sea Eagles at the Northern Sea of Okhotsk: What Did We Learn? |
title_full_unstemmed |
Long-term Monitoring of the Steller’s Sea Eagles at the Northern Sea of Okhotsk: What Did We Learn? |
title_sort |
long-term monitoring of the steller’s sea eagles at the northern sea of okhotsk: what did we learn? |
publisher |
LLC Sibecocenter |
publishDate |
2018 |
url |
https://doaj.org/article/5e686db097fe4b81bf09cb48464f3378 |
long_lat |
ENVELOPE(150.803,150.803,59.564,59.564) |
geographic |
Magadan Okhotsk |
geographic_facet |
Magadan Okhotsk |
genre |
Sea ice Siberia |
genre_facet |
Sea ice Siberia |
op_source |
Пернатые хищники и их охрана, Vol 0, Iss 1 (2018) |
op_relation |
http://rusraptors.ru/index.php/RC/article/view/130 https://doaj.org/toc/1814-0076 https://doaj.org/toc/1814-8654 1814-0076 1814-8654 https://doaj.org/article/5e686db097fe4b81bf09cb48464f3378 |
_version_ |
1766195535514959872 |