Distribution and numbers of Canadian High Arctic narwhals (Monodon monoceros) in August 1984
Aerial photographic surveys of the numbers and distribution of narwhals (Monodon monoceros) in fjords and inlets south of Parry Channel, N.W.T., Canada, were conducted between 17 and 29 August 1984. Narwhals were concentrated in waters 350 m or more in depth and were most abundant in Prince Regent I...
Main Authors: | , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Danish Polar Center/Museum Tusculanum Press
1994
|
Subjects: | |
Online Access: | https://tidsskrift.dk/meddrgroenland_biosci/article/view/142533 |
id |
ftsbaarhusojs:oai:ojs.tidsskrift.dk:article/142533 |
---|---|
record_format |
openpolar |
spelling |
ftsbaarhusojs:oai:ojs.tidsskrift.dk:article/142533 2024-01-28T10:03:48+01:00 Distribution and numbers of Canadian High Arctic narwhals (Monodon monoceros) in August 1984 Richard, Pierre Weaver, Patt Dueck, Larry Barber, David 1994-04-22 application/pdf https://tidsskrift.dk/meddrgroenland_biosci/article/view/142533 eng eng Danish Polar Center/Museum Tusculanum Press https://tidsskrift.dk/meddrgroenland_biosci/article/view/142533/186207 https://tidsskrift.dk/meddrgroenland_biosci/article/view/142533 Meddelelser om Grønland. Bioscience; Vol. 39 (1994): Meddelelser om Grønland. Bioscience; 41-50 Meddelelser om Grønland. Bioscience; Årg. 39 (1994): Meddelelser om Grønland. Bioscience; 41-50 0106-1054 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1994 ftsbaarhusojs 2024-01-03T23:59:24Z Aerial photographic surveys of the numbers and distribution of narwhals (Monodon monoceros) in fjords and inlets south of Parry Channel, N.W.T., Canada, were conducted between 17 and 29 August 1984. Narwhals were concentrated in waters 350 m or more in depth and were most abundant in Prince Regent Inlet and Admiralty Inlet. An estimate of 18 000 narwhals (90% Cl 15 000- 21 000) was obtained by combining estimates for the Eclipse Sound area, Admiralty Inlet, Prince Regent Inlet and Peel Sound. We evaluated the visibility of narwhal and white whale (Delphinapterus leucas) models submerged to different depths. Models of adult narwhals could be seen when submerged to I 0 m but could only be clearly distinguished from white whales at depths of 2 m. Such results indicate a limit to counting submerged narwhals. This problem, along with other factors, constrains the estimation of population size. Article in Journal/Newspaper Arctic Delphinapterus leucas Eclipse Sound Monodon monoceros narwhal* Parry Channel Prince Regent Inlet White whale Aarhus University: OJS at The State and University Library Arctic Canada Parry ENVELOPE(-62.417,-62.417,-64.283,-64.283) Eclipse Sound ENVELOPE(-78.998,-78.998,72.635,72.635) Admiralty Inlet ENVELOPE(-86.000,-86.000,72.501,72.501) Peel Sound ENVELOPE(-96.334,-96.334,73.001,73.001) Prince Regent Inlet ENVELOPE(-90.431,-90.431,72.993,72.993) |
institution |
Open Polar |
collection |
Aarhus University: OJS at The State and University Library |
op_collection_id |
ftsbaarhusojs |
language |
English |
description |
Aerial photographic surveys of the numbers and distribution of narwhals (Monodon monoceros) in fjords and inlets south of Parry Channel, N.W.T., Canada, were conducted between 17 and 29 August 1984. Narwhals were concentrated in waters 350 m or more in depth and were most abundant in Prince Regent Inlet and Admiralty Inlet. An estimate of 18 000 narwhals (90% Cl 15 000- 21 000) was obtained by combining estimates for the Eclipse Sound area, Admiralty Inlet, Prince Regent Inlet and Peel Sound. We evaluated the visibility of narwhal and white whale (Delphinapterus leucas) models submerged to different depths. Models of adult narwhals could be seen when submerged to I 0 m but could only be clearly distinguished from white whales at depths of 2 m. Such results indicate a limit to counting submerged narwhals. This problem, along with other factors, constrains the estimation of population size. |
format |
Article in Journal/Newspaper |
author |
Richard, Pierre Weaver, Patt Dueck, Larry Barber, David |
spellingShingle |
Richard, Pierre Weaver, Patt Dueck, Larry Barber, David Distribution and numbers of Canadian High Arctic narwhals (Monodon monoceros) in August 1984 |
author_facet |
Richard, Pierre Weaver, Patt Dueck, Larry Barber, David |
author_sort |
Richard, Pierre |
title |
Distribution and numbers of Canadian High Arctic narwhals (Monodon monoceros) in August 1984 |
title_short |
Distribution and numbers of Canadian High Arctic narwhals (Monodon monoceros) in August 1984 |
title_full |
Distribution and numbers of Canadian High Arctic narwhals (Monodon monoceros) in August 1984 |
title_fullStr |
Distribution and numbers of Canadian High Arctic narwhals (Monodon monoceros) in August 1984 |
title_full_unstemmed |
Distribution and numbers of Canadian High Arctic narwhals (Monodon monoceros) in August 1984 |
title_sort |
distribution and numbers of canadian high arctic narwhals (monodon monoceros) in august 1984 |
publisher |
Danish Polar Center/Museum Tusculanum Press |
publishDate |
1994 |
url |
https://tidsskrift.dk/meddrgroenland_biosci/article/view/142533 |
long_lat |
ENVELOPE(-62.417,-62.417,-64.283,-64.283) ENVELOPE(-78.998,-78.998,72.635,72.635) ENVELOPE(-86.000,-86.000,72.501,72.501) ENVELOPE(-96.334,-96.334,73.001,73.001) ENVELOPE(-90.431,-90.431,72.993,72.993) |
geographic |
Arctic Canada Parry Eclipse Sound Admiralty Inlet Peel Sound Prince Regent Inlet |
geographic_facet |
Arctic Canada Parry Eclipse Sound Admiralty Inlet Peel Sound Prince Regent Inlet |
genre |
Arctic Delphinapterus leucas Eclipse Sound Monodon monoceros narwhal* Parry Channel Prince Regent Inlet White whale |
genre_facet |
Arctic Delphinapterus leucas Eclipse Sound Monodon monoceros narwhal* Parry Channel Prince Regent Inlet White whale |
op_source |
Meddelelser om Grønland. Bioscience; Vol. 39 (1994): Meddelelser om Grønland. Bioscience; 41-50 Meddelelser om Grønland. Bioscience; Årg. 39 (1994): Meddelelser om Grønland. Bioscience; 41-50 0106-1054 |
op_relation |
https://tidsskrift.dk/meddrgroenland_biosci/article/view/142533/186207 https://tidsskrift.dk/meddrgroenland_biosci/article/view/142533 |
_version_ |
1789329265784782848 |