Movements of narwhals (<Emphasis Type="Italic">Monodon monoceros</Emphasis>) from Admiralty Inlet monitored by satellite telemetry |
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Authors: | Rune Dietz Mads Peter Heide-Jørgensen Pierre Richard Jack Orr Kristin Laidre Hans Christian Schmidt |
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Institution: | (1) National Environmental Research Institute, University of Aarhus, Frederiksborgvej 399, P·O. Box 358, 4000 Roskilde, Denmark;(2) Greenland Institute of Natural Resources, P·O. Box 570, 3900 Nuuk, Greenland;(3) Department of Fisheries and Oceans, Freshwater Institute, 501 University Crescent, Winnipeg, MB, R3T 2N6, Canada |
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Abstract: | Twenty-one narwhals tagged in 2003 and 2004 in Admiralty Inlet showed a different summer distributional pattern than previous
narwhal-tracking studies from Somerset Island, Eclipse Sound and Melville Bay. The migration of the narwhals tracked from
Admiralty Inlet moved out through Lancaster Sound 15 days earlier (P < 0.0001) than the narwhals summering around Eclipse Sound, whereas the Admiralty Inlet narwhals reached the mouths of Eclipse
Sound 18 days later (P < 0.0001) than the Eclipse Sound summering population. The winter range of the Admiralty Inlet narwhals overlapped with the
winter range of narwhals from Melville Bay and Eclipse Sound in central southern Baffin Bay and Northern Davis Strait, but
not with the winter range of narwhals from Somerset Island that wintered further north. Distribution size of range, and population
size did not appear to be related. An example of considerable year to year variation between area of summer and winter distribution
in the 2 years was believed to be related to the sample size and number of pods of whales tagged, rather than to differences
in sex or age classes. |
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Keywords: | Narwhal Telemetry Admiralty Inlet Baffin Bay Davis Strait Migration |
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