Status of harbour seals ( Phoca vitulina ) in mainland Norway
Harbour seals were counted along the entire Norwegian coast at known moulting haulout sites in the period mid-August to early September 2003-2006. In 2003-2005, almost all known moulting areas from Finnmark to Vestfold counties were covered by aerial photo surveys flown at altitudes of approximately...
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2010
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ftdoajarticles:oai:doaj.org/article:8577f92154fc412da7b8fafb42f772a5 2023-05-15T16:13:42+02:00 Status of harbour seals ( Phoca vitulina ) in mainland Norway Kjell Tormod Nilssen Nils-Erik Skavberg Michael Poltermann Tore Haug Tero Härkönen Gunnar Henriksen 2010-09-01T00:00:00Z https://doi.org/10.7557/3.2672 https://doaj.org/article/8577f92154fc412da7b8fafb42f772a5 EN eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2672 https://doaj.org/toc/1560-2206 https://doaj.org/toc/2309-2491 1560-2206 2309-2491 doi:10.7557/3.2672 https://doaj.org/article/8577f92154fc412da7b8fafb42f772a5 NAMMCO Scientific Publications, Vol 8, Iss 0, Pp 61-69 (2010) harbour seals Norway surveys abundance Ecology QH540-549.5 article 2010 ftdoajarticles https://doi.org/10.7557/3.2672 2022-12-31T13:44:03Z Harbour seals were counted along the entire Norwegian coast at known moulting haulout sites in the period mid-August to early September 2003-2006. In 2003-2005, almost all known moulting areas from Finnmark to Vestfold counties were covered by aerial photo surveys flown at altitudes of approximately 800-900 ft (243-274m), and at low tide (± 2 hours). Surveys in the Østfold County were flown in 2003-2006 at 300 ft (91m), and the small tidal amplitudes permitted counts to be carried out irrespective of the tidal cycle. In some sub-areas, two or three independent surveys were conducted. Visual counts using binoculars from smaller boats and islands were carried out in some selected areas. The surveys revealed a total minimum population of 6,705 harbour seals in Norwegian waters. Harbour seals were most abundant in the Nordland and Sør-Trøndelag counties with minimum estimates of approximately 2,500 and 1,500 seals, respectively. The presented minimum estimate is approximately 800 seals lower than an estimate obtained in a comparable study carried out during the moult in 1996-1999. Increased anthropogenic removals, and the phocine distemper virus (PDV) epidemic in the Skagerrak region in 2002, may have contributed to the current lower estimate. Article in Journal/Newspaper Finnmark Nordland Nordland Phoca vitulina Finnmark Nordland Directory of Open Access Journals: DOAJ Articles Norway Vestfold NAMMCO Scientific Publications 8 61 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
harbour seals Norway surveys abundance Ecology QH540-549.5 |
spellingShingle |
harbour seals Norway surveys abundance Ecology QH540-549.5 Kjell Tormod Nilssen Nils-Erik Skavberg Michael Poltermann Tore Haug Tero Härkönen Gunnar Henriksen Status of harbour seals ( Phoca vitulina ) in mainland Norway |
topic_facet |
harbour seals Norway surveys abundance Ecology QH540-549.5 |
description |
Harbour seals were counted along the entire Norwegian coast at known moulting haulout sites in the period mid-August to early September 2003-2006. In 2003-2005, almost all known moulting areas from Finnmark to Vestfold counties were covered by aerial photo surveys flown at altitudes of approximately 800-900 ft (243-274m), and at low tide (± 2 hours). Surveys in the Østfold County were flown in 2003-2006 at 300 ft (91m), and the small tidal amplitudes permitted counts to be carried out irrespective of the tidal cycle. In some sub-areas, two or three independent surveys were conducted. Visual counts using binoculars from smaller boats and islands were carried out in some selected areas. The surveys revealed a total minimum population of 6,705 harbour seals in Norwegian waters. Harbour seals were most abundant in the Nordland and Sør-Trøndelag counties with minimum estimates of approximately 2,500 and 1,500 seals, respectively. The presented minimum estimate is approximately 800 seals lower than an estimate obtained in a comparable study carried out during the moult in 1996-1999. Increased anthropogenic removals, and the phocine distemper virus (PDV) epidemic in the Skagerrak region in 2002, may have contributed to the current lower estimate. |
format |
Article in Journal/Newspaper |
author |
Kjell Tormod Nilssen Nils-Erik Skavberg Michael Poltermann Tore Haug Tero Härkönen Gunnar Henriksen |
author_facet |
Kjell Tormod Nilssen Nils-Erik Skavberg Michael Poltermann Tore Haug Tero Härkönen Gunnar Henriksen |
author_sort |
Kjell Tormod Nilssen |
title |
Status of harbour seals ( Phoca vitulina ) in mainland Norway |
title_short |
Status of harbour seals ( Phoca vitulina ) in mainland Norway |
title_full |
Status of harbour seals ( Phoca vitulina ) in mainland Norway |
title_fullStr |
Status of harbour seals ( Phoca vitulina ) in mainland Norway |
title_full_unstemmed |
Status of harbour seals ( Phoca vitulina ) in mainland Norway |
title_sort |
status of harbour seals ( phoca vitulina ) in mainland norway |
publisher |
Septentrio Academic Publishing |
publishDate |
2010 |
url |
https://doi.org/10.7557/3.2672 https://doaj.org/article/8577f92154fc412da7b8fafb42f772a5 |
geographic |
Norway Vestfold |
geographic_facet |
Norway Vestfold |
genre |
Finnmark Nordland Nordland Phoca vitulina Finnmark Nordland |
genre_facet |
Finnmark Nordland Nordland Phoca vitulina Finnmark Nordland |
op_source |
NAMMCO Scientific Publications, Vol 8, Iss 0, Pp 61-69 (2010) |
op_relation |
https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2672 https://doaj.org/toc/1560-2206 https://doaj.org/toc/2309-2491 1560-2206 2309-2491 doi:10.7557/3.2672 https://doaj.org/article/8577f92154fc412da7b8fafb42f772a5 |
op_doi |
https://doi.org/10.7557/3.2672 |
container_title |
NAMMCO Scientific Publications |
container_volume |
8 |
container_start_page |
61 |
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1765999531841814528 |