Density Distribution of Fish in the Presence of Whales at the Admiralty Inlet Landfast Ice Edge
Hydroacoustic techniques were used to search for fish beneath landfast sea ice in Admiralty Inlet, Northwest Territories, Canada, when narwhal (Monodon monoceros) and beluga whales (Delphinapterus leucas) were congregating at the ice edge in the mouth of the inlet. Fish, presumably Arctic cod (Boreo...
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1990
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ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/64668 2023-05-15T14:19:13+02:00 Density Distribution of Fish in the Presence of Whales at the Admiralty Inlet Landfast Ice Edge Crawford, R. Jorgenson, J. 1990-01-01 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64668 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64668/48582 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64668 ARCTIC; Vol. 43 No. 3 (1990): September: 201–300; 215-222 1923-1245 0004-0843 Arctic cod Boreogadus saida landfast ice edge hydroacoustics narwhal beluga morue arctique Boreogudus saïda banquise côtière lisière des glaces hydroacoustique narval info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1990 ftunivcalgaryojs 2022-03-22T21:21:48Z Hydroacoustic techniques were used to search for fish beneath landfast sea ice in Admiralty Inlet, Northwest Territories, Canada, when narwhal (Monodon monoceros) and beluga whales (Delphinapterus leucas) were congregating at the ice edge in the mouth of the inlet. Fish, presumably Arctic cod (Boreogadus saida), were distributed in the water column within four general layers or zones; near the ice undersurface, about 40 m deep, about 80-100 m deep, and about 150-200 m deep. The distribution of the first three layers roughly corresponded with the distribution of larger zooplankters, also estimated hydroacoustically. We recorded higher densities immediately below the ice than farther down in the water column. Maximum density in both regions occurred about 10 km from the ice edge. Fish density was low in the immediate vicinity of the ice edge. The distribution of fish underneath the landfast ice of Admiralty Inlet is postulated to have been influenced by the distribution of zooplankton, their principle food source, rather than by the presence of whales. Article in Journal/Newspaper Arctic Arctic cod Arctic Arctique* banquise Beluga Beluga* Boreogadus saida Delphinapterus leucas Monodon monoceros narwhal* Northwest Territories Sea ice Zooplankton narval narval University of Calgary Journal Hosting Admiralty Inlet ENVELOPE(-86.000,-86.000,72.501,72.501) Arctic Canada Northwest Territories ARCTIC 43 3 |
institution |
Open Polar |
collection |
University of Calgary Journal Hosting |
op_collection_id |
ftunivcalgaryojs |
language |
English |
topic |
Arctic cod Boreogadus saida landfast ice edge hydroacoustics narwhal beluga morue arctique Boreogudus saïda banquise côtière lisière des glaces hydroacoustique narval |
spellingShingle |
Arctic cod Boreogadus saida landfast ice edge hydroacoustics narwhal beluga morue arctique Boreogudus saïda banquise côtière lisière des glaces hydroacoustique narval Crawford, R. Jorgenson, J. Density Distribution of Fish in the Presence of Whales at the Admiralty Inlet Landfast Ice Edge |
topic_facet |
Arctic cod Boreogadus saida landfast ice edge hydroacoustics narwhal beluga morue arctique Boreogudus saïda banquise côtière lisière des glaces hydroacoustique narval |
description |
Hydroacoustic techniques were used to search for fish beneath landfast sea ice in Admiralty Inlet, Northwest Territories, Canada, when narwhal (Monodon monoceros) and beluga whales (Delphinapterus leucas) were congregating at the ice edge in the mouth of the inlet. Fish, presumably Arctic cod (Boreogadus saida), were distributed in the water column within four general layers or zones; near the ice undersurface, about 40 m deep, about 80-100 m deep, and about 150-200 m deep. The distribution of the first three layers roughly corresponded with the distribution of larger zooplankters, also estimated hydroacoustically. We recorded higher densities immediately below the ice than farther down in the water column. Maximum density in both regions occurred about 10 km from the ice edge. Fish density was low in the immediate vicinity of the ice edge. The distribution of fish underneath the landfast ice of Admiralty Inlet is postulated to have been influenced by the distribution of zooplankton, their principle food source, rather than by the presence of whales. |
format |
Article in Journal/Newspaper |
author |
Crawford, R. Jorgenson, J. |
author_facet |
Crawford, R. Jorgenson, J. |
author_sort |
Crawford, R. |
title |
Density Distribution of Fish in the Presence of Whales at the Admiralty Inlet Landfast Ice Edge |
title_short |
Density Distribution of Fish in the Presence of Whales at the Admiralty Inlet Landfast Ice Edge |
title_full |
Density Distribution of Fish in the Presence of Whales at the Admiralty Inlet Landfast Ice Edge |
title_fullStr |
Density Distribution of Fish in the Presence of Whales at the Admiralty Inlet Landfast Ice Edge |
title_full_unstemmed |
Density Distribution of Fish in the Presence of Whales at the Admiralty Inlet Landfast Ice Edge |
title_sort |
density distribution of fish in the presence of whales at the admiralty inlet landfast ice edge |
publisher |
The Arctic Institute of North America |
publishDate |
1990 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64668 |
long_lat |
ENVELOPE(-86.000,-86.000,72.501,72.501) |
geographic |
Admiralty Inlet Arctic Canada Northwest Territories |
geographic_facet |
Admiralty Inlet Arctic Canada Northwest Territories |
genre |
Arctic Arctic cod Arctic Arctique* banquise Beluga Beluga* Boreogadus saida Delphinapterus leucas Monodon monoceros narwhal* Northwest Territories Sea ice Zooplankton narval narval |
genre_facet |
Arctic Arctic cod Arctic Arctique* banquise Beluga Beluga* Boreogadus saida Delphinapterus leucas Monodon monoceros narwhal* Northwest Territories Sea ice Zooplankton narval narval |
op_source |
ARCTIC; Vol. 43 No. 3 (1990): September: 201–300; 215-222 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64668/48582 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64668 |
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ARCTIC |
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43 |
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3 |
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