Results of instrumental aerial survey of ice-associated seals on the ice in the Okhotsk Sea in May 2013
Populations of ice-associated seals in the Okhotsk Sea are assessed using modern instrumental aerial technique. The aerial survey was conducted over a part of the ice-covered area of the Sea on May 1-9, 2013 by means of thermal scan and visual digital photography from the aircraft-laboratory An-38 «...
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Transactions of the Pacific Research Institute of Fisheries and Oceanography
2014
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Online Access: | https://doi.org/10.26428/1606-9919-2014-179-158-176 https://doaj.org/article/cee761fb5a3e4e04b3cfacd6ccc094bd |
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ftdoajarticles:oai:doaj.org/article:cee761fb5a3e4e04b3cfacd6ccc094bd 2023-10-09T21:54:58+02:00 Results of instrumental aerial survey of ice-associated seals on the ice in the Okhotsk Sea in May 2013 Vladimir I. Chernook Aleksey I. Grachev Alexandr N. Vasiliev Irina S. Trukhanova Vladimir N. Burkanov Boris A. Solovyev 2014-12-01T00:00:00Z https://doi.org/10.26428/1606-9919-2014-179-158-176 https://doaj.org/article/cee761fb5a3e4e04b3cfacd6ccc094bd RU rus Transactions of the Pacific Research Institute of Fisheries and Oceanography https://izvestiya.tinro-center.ru/jour/article/view/231 https://doaj.org/toc/1606-9919 https://doaj.org/toc/2658-5510 1606-9919 2658-5510 doi:10.26428/1606-9919-2014-179-158-176 https://doaj.org/article/cee761fb5a3e4e04b3cfacd6ccc094bd Известия ТИНРО, Vol 179, Iss 4, Pp 158-176 (2014) охотское море авиаучёт тюлени лахтак акиба крылатка ларга лёд тепловая съёмка фотосъёмка численность распределение Aquaculture. Fisheries. Angling SH1-691 article 2014 ftdoajarticles https://doi.org/10.26428/1606-9919-2014-179-158-176 2023-09-10T00:41:26Z Populations of ice-associated seals in the Okhotsk Sea are assessed using modern instrumental aerial technique. The aerial survey was conducted over a part of the ice-covered area of the Sea on May 1-9, 2013 by means of thermal scan and visual digital photography from the aircraft-laboratory An-38 «Vostok». The ice covered area of the Okhotsk Sea in the time of survey was estimated as 242,000 km2, and 2,993 km2 of it was covered by survey transects with total length 5,617 km. The number of animals on all transects within the equipment swath was counted. Four seal species were identified: bearded, spotted, ribbon, and ringed seals, and their number and distribution were determined. The infra-red scanner recorded 5,730 seals on the ice and 4,360 these animals were photographed including 844 ringed seals, 453 bearded, 721 spotted, 1,805 ribbon, 435 pups non-identified to the species, and 102 non-identified to species adult seals. These assessments were extrapolated over the whole ice-covered area of the Okhotsk Sea using a linear model framework, and the following estimations of the species total abundance were presented (95 % confidence intervals in brackets): 88,253 (64,120-130,320) ringed seals, 39,743 (27,868-60,026) bearded seals, 181,179 (118,392-316,995) ribbon seals, and 84,356 (55,172-113,540) spotted seals. A database on all recorded seals with their «portrait-photos» and accompanying information is created on materials of the aerial survey. The developed instrumental technology can be used as a basis for wider aerial surveys of ice-associated seals in the North Pacific. Article in Journal/Newspaper okhotsk sea Directory of Open Access Journals: DOAJ Articles Okhotsk Pacific Izvestiya TINRO 179 4 158 176 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
Russian |
topic |
охотское море авиаучёт тюлени лахтак акиба крылатка ларга лёд тепловая съёмка фотосъёмка численность распределение Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
охотское море авиаучёт тюлени лахтак акиба крылатка ларга лёд тепловая съёмка фотосъёмка численность распределение Aquaculture. Fisheries. Angling SH1-691 Vladimir I. Chernook Aleksey I. Grachev Alexandr N. Vasiliev Irina S. Trukhanova Vladimir N. Burkanov Boris A. Solovyev Results of instrumental aerial survey of ice-associated seals on the ice in the Okhotsk Sea in May 2013 |
topic_facet |
охотское море авиаучёт тюлени лахтак акиба крылатка ларга лёд тепловая съёмка фотосъёмка численность распределение Aquaculture. Fisheries. Angling SH1-691 |
description |
Populations of ice-associated seals in the Okhotsk Sea are assessed using modern instrumental aerial technique. The aerial survey was conducted over a part of the ice-covered area of the Sea on May 1-9, 2013 by means of thermal scan and visual digital photography from the aircraft-laboratory An-38 «Vostok». The ice covered area of the Okhotsk Sea in the time of survey was estimated as 242,000 km2, and 2,993 km2 of it was covered by survey transects with total length 5,617 km. The number of animals on all transects within the equipment swath was counted. Four seal species were identified: bearded, spotted, ribbon, and ringed seals, and their number and distribution were determined. The infra-red scanner recorded 5,730 seals on the ice and 4,360 these animals were photographed including 844 ringed seals, 453 bearded, 721 spotted, 1,805 ribbon, 435 pups non-identified to the species, and 102 non-identified to species adult seals. These assessments were extrapolated over the whole ice-covered area of the Okhotsk Sea using a linear model framework, and the following estimations of the species total abundance were presented (95 % confidence intervals in brackets): 88,253 (64,120-130,320) ringed seals, 39,743 (27,868-60,026) bearded seals, 181,179 (118,392-316,995) ribbon seals, and 84,356 (55,172-113,540) spotted seals. A database on all recorded seals with their «portrait-photos» and accompanying information is created on materials of the aerial survey. The developed instrumental technology can be used as a basis for wider aerial surveys of ice-associated seals in the North Pacific. |
format |
Article in Journal/Newspaper |
author |
Vladimir I. Chernook Aleksey I. Grachev Alexandr N. Vasiliev Irina S. Trukhanova Vladimir N. Burkanov Boris A. Solovyev |
author_facet |
Vladimir I. Chernook Aleksey I. Grachev Alexandr N. Vasiliev Irina S. Trukhanova Vladimir N. Burkanov Boris A. Solovyev |
author_sort |
Vladimir I. Chernook |
title |
Results of instrumental aerial survey of ice-associated seals on the ice in the Okhotsk Sea in May 2013 |
title_short |
Results of instrumental aerial survey of ice-associated seals on the ice in the Okhotsk Sea in May 2013 |
title_full |
Results of instrumental aerial survey of ice-associated seals on the ice in the Okhotsk Sea in May 2013 |
title_fullStr |
Results of instrumental aerial survey of ice-associated seals on the ice in the Okhotsk Sea in May 2013 |
title_full_unstemmed |
Results of instrumental aerial survey of ice-associated seals on the ice in the Okhotsk Sea in May 2013 |
title_sort |
results of instrumental aerial survey of ice-associated seals on the ice in the okhotsk sea in may 2013 |
publisher |
Transactions of the Pacific Research Institute of Fisheries and Oceanography |
publishDate |
2014 |
url |
https://doi.org/10.26428/1606-9919-2014-179-158-176 https://doaj.org/article/cee761fb5a3e4e04b3cfacd6ccc094bd |
geographic |
Okhotsk Pacific |
geographic_facet |
Okhotsk Pacific |
genre |
okhotsk sea |
genre_facet |
okhotsk sea |
op_source |
Известия ТИНРО, Vol 179, Iss 4, Pp 158-176 (2014) |
op_relation |
https://izvestiya.tinro-center.ru/jour/article/view/231 https://doaj.org/toc/1606-9919 https://doaj.org/toc/2658-5510 1606-9919 2658-5510 doi:10.26428/1606-9919-2014-179-158-176 https://doaj.org/article/cee761fb5a3e4e04b3cfacd6ccc094bd |
op_doi |
https://doi.org/10.26428/1606-9919-2014-179-158-176 |
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Izvestiya TINRO |
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179 |
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