The Narwhal, Monodon monoceros , in Eastern Canadian Waters
In the Pond Inlet area of Baffin Island in 1963–65, 62 narwhals (Monodon monoceros) were caught in nets and examined. Growth layers occur in both the extruded tusk and in the embedded tooth. The few identifiable food remains in stomachs were of squid and Arctic cod. At birth, the calf measures about...
Published in: | Journal of the Fisheries Research Board of Canada |
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Language: | English |
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Canadian Science Publishing
1975
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Online Access: | http://dx.doi.org/10.1139/f75-122 http://www.nrcresearchpress.com/doi/pdf/10.1139/f75-122 |
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crcansciencepubl:10.1139/f75-122 2024-04-07T07:48:59+00:00 The Narwhal, Monodon monoceros , in Eastern Canadian Waters Mansfield, A. W. Smith, T. G. Beck, B. 1975 http://dx.doi.org/10.1139/f75-122 http://www.nrcresearchpress.com/doi/pdf/10.1139/f75-122 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Journal of the Fisheries Research Board of Canada volume 32, issue 7, page 1041-1046 ISSN 0015-296X journal-article 1975 crcansciencepubl https://doi.org/10.1139/f75-122 2024-03-08T00:37:51Z In the Pond Inlet area of Baffin Island in 1963–65, 62 narwhals (Monodon monoceros) were caught in nets and examined. Growth layers occur in both the extruded tusk and in the embedded tooth. The few identifiable food remains in stomachs were of squid and Arctic cod. At birth, the calf measures about 160 cm in length and weighs just over 80 kg. Fully grown females attain a length of 400 cm and a weight of 900 kg. Males reach 470 cm and a weight of 1600 kg. Calving is assumed to occur about once in 3 yr. A conservative estimate for the narwhal population of Canada and northwestern Greenland is approximately 10,000. Although the birth rate is unknown, it is assumed to be similar to that calculated for the closely related white whale; that is, about 9%. The maximum potential annual catch, based on the highest reported Canadian catch of 442 narwhals in 1957, combined with the Greenland catch of 135 and an assumed sinking loss of 50%, is about 1154. This is above the estimated annual production of 900. Article in Journal/Newspaper Arctic cod Arctic Baffin Island Baffin Greenland Monodon monoceros narwhal* Pond Inlet White whale Canadian Science Publishing Arctic Baffin Island Canada Greenland Pond Inlet ENVELOPE(-77.960,-77.960,72.699,72.699) Tooth The ENVELOPE(168.983,168.983,-77.517,-77.517) Journal of the Fisheries Research Board of Canada 32 7 1041 1046 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
In the Pond Inlet area of Baffin Island in 1963–65, 62 narwhals (Monodon monoceros) were caught in nets and examined. Growth layers occur in both the extruded tusk and in the embedded tooth. The few identifiable food remains in stomachs were of squid and Arctic cod. At birth, the calf measures about 160 cm in length and weighs just over 80 kg. Fully grown females attain a length of 400 cm and a weight of 900 kg. Males reach 470 cm and a weight of 1600 kg. Calving is assumed to occur about once in 3 yr. A conservative estimate for the narwhal population of Canada and northwestern Greenland is approximately 10,000. Although the birth rate is unknown, it is assumed to be similar to that calculated for the closely related white whale; that is, about 9%. The maximum potential annual catch, based on the highest reported Canadian catch of 442 narwhals in 1957, combined with the Greenland catch of 135 and an assumed sinking loss of 50%, is about 1154. This is above the estimated annual production of 900. |
format |
Article in Journal/Newspaper |
author |
Mansfield, A. W. Smith, T. G. Beck, B. |
spellingShingle |
Mansfield, A. W. Smith, T. G. Beck, B. The Narwhal, Monodon monoceros , in Eastern Canadian Waters |
author_facet |
Mansfield, A. W. Smith, T. G. Beck, B. |
author_sort |
Mansfield, A. W. |
title |
The Narwhal, Monodon monoceros , in Eastern Canadian Waters |
title_short |
The Narwhal, Monodon monoceros , in Eastern Canadian Waters |
title_full |
The Narwhal, Monodon monoceros , in Eastern Canadian Waters |
title_fullStr |
The Narwhal, Monodon monoceros , in Eastern Canadian Waters |
title_full_unstemmed |
The Narwhal, Monodon monoceros , in Eastern Canadian Waters |
title_sort |
narwhal, monodon monoceros , in eastern canadian waters |
publisher |
Canadian Science Publishing |
publishDate |
1975 |
url |
http://dx.doi.org/10.1139/f75-122 http://www.nrcresearchpress.com/doi/pdf/10.1139/f75-122 |
long_lat |
ENVELOPE(-77.960,-77.960,72.699,72.699) ENVELOPE(168.983,168.983,-77.517,-77.517) |
geographic |
Arctic Baffin Island Canada Greenland Pond Inlet Tooth The |
geographic_facet |
Arctic Baffin Island Canada Greenland Pond Inlet Tooth The |
genre |
Arctic cod Arctic Baffin Island Baffin Greenland Monodon monoceros narwhal* Pond Inlet White whale |
genre_facet |
Arctic cod Arctic Baffin Island Baffin Greenland Monodon monoceros narwhal* Pond Inlet White whale |
op_source |
Journal of the Fisheries Research Board of Canada volume 32, issue 7, page 1041-1046 ISSN 0015-296X |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f75-122 |
container_title |
Journal of the Fisheries Research Board of Canada |
container_volume |
32 |
container_issue |
7 |
container_start_page |
1041 |
op_container_end_page |
1046 |
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1795663043769663488 |