Abstract
Three juvenile narwhals captured during August 1998 in the northeast of Svalbard, Norway, were equipped with satellite-relayed data loggers (SRDLs) that transmitted diving and swim-speed data, in addition to location, for up to 46 days. A total of 1,354 complete dive cycles were recorded. Most of the diving was shallow and of short duration. Maximum recorded dive depth was 546 m, maximum recorded dive duration was 24.8 min, and maximum recorded swim-speed was 4.7 ms−1. Ascent speed, vertical ascent speed, descent speed and vertical descent speed were all significantly higher during deep dives (>200 m) than for shallow dives (<200 m). In addition both ascent and descent angles were much steeper for deep dives than during shallow dives. Most of the shallow diving seemed to be associated with travelling, with the animal shifting between various locations, while the deep diving (often to the bottom) for extended periods in some specific areas might have been associated with foraging. Even though the sample size in this study is small, the data are the first information available for movements and diving behaviour of narwhals near Svalbard.
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References
ARGOS (1989) Guide to the Argos system. Argos CES, Toulouse
Dietz R, Heide-Jørgensen MP (1995) Movements and swimming speed of narwhals, Monodon monoceros, equipped with satellite transmitters in Melville Bay, northwest Greenland. Can J Zool 73:2106–2119
Dietz R, Heide-Jørgensen MP, Born EW, Glaher CM (1994) Occurrence of narwhals (Monodon monoceros) and white whales (Delphinapterus leucas) in East Greenland. Meddr Grønland Biosci 39:69–86
Dietz R, Heide-Jørgensen MP, Richard PR, Aquarone M (2001) Summer and fall movements of narwhals (Monodon monoceros) from northeastern Baffin Island towards northern Davis Strait. Arctic 54:244–261
Finley KJ, Gibb J (1982) Summer diet of the narwhal (Monodon monoceros) in Pond Inlet, northern Baffin Island. Can J Zool 60:3353–3363
Finley KJ, Miller GW, Davis RA, Greene CR (1990) Reactions of belugas, Delphinapterus leucas, and narwhals, Monodon monoceros, to ice-breaking ships in the Canadian High Arctic. Can Bull Fish Aquat Sci 224:97–117
Gjertz I (1991) The narwhal, Monodon monoceros, in the Norwegian high Arctic. Mar Mammal Sci 7:402–408
Heide-Jørgensen MP (2002) Narwhal Monodon monoceros. In: Perrin WF, Würsig B, Thewissen JGM (eds) Encyclopedia of marine mammals. Acad Press, San Diego, pp 783–787
Heide-Jørgensen MP, Dietz R (1995) Some characteristics of narwhal, Monodon monoceros, diving behaviour in Baffin Bay. Can J Zool 73:2120–2132
Heide-Jørgensen MP, Dietz R, Leatherwood S (1994) A note on the diet of narwhals (Monodon monoceros) in Inglefield Bredning (NW Greenland). Meddr Grønl Biosci 39:213–216
Heide-Jørgensen MP, Hammeken N, Dietz R, Orr J, Richard PR (2001) Surfacing times and dive rates for narwhals (Monodon monoceros) and belugas (Delphinapterus leucas). Arctic 54:284–298
Heide-Jørgensen MP, Dietz R, Laidre KL, Richard PR (2002) Autumn movements, home ranges, and winter density of narwhals (Monodon monoceros) tagged in Tremblay Sound, Baffin Island. Polar Biol 25:331–341
Heide-Jørgensen MP, Dietz R, Laidre KL, Richard PR, Orr J, Schmidt HC (2003) The migratory behaviour of narwhals (Monodon monoceros). Can J Zool 81:1298–1305
Laidre KL, Heide-Jørgensen MP (2005) Winter feeding intensity of narwhals (Monodon monoceros). Mar Mammal Sci 21:45–57
Laidre KL, Heide-Jørgensen MP, Dietz R (2002) Diving behaviour of narwhals (Monodon monoceros) at two localities in the Canadian high Arctic. Can J Zool 80:624–635
Laidre KL, Heide-Jørgensen MP, Dietz R, Hobbs RC, Jørgensen OA (2003) Deep-diving by narwhals Monodon monoceros: differences in foraging behavior between wintering areas? Mar Ecol Progr Ser 261:269–281
Laidre KL, Heide-Jørgensen MP, Jørgensen OA, Treble MA (2004) Deep-ocean predation by a high Arctic cetacean. ICES J Mar Sci 61:430–440
Mansfield AW, Smith TG, Beck B (1975) The narwhal, Monodon monoceros, in eastern Canadian waters. J Fish Res Bd Can 32:1041–1046
Martin AR, Kingsley MCS, Ramsay MA (1994) Diving behaviour of narwhals (Monodon monoceros) on their summer ground. Can J Zool 72:118–125
McConnell BJ, Chambers C, Fedak MA (1992) Foraging ecology of southern elephant seals in relation to bathymetry and productivity of the Southern Ocean. Antarct Sci 4:393–398
Acknowledgments
This study was funded by the Norwegian Polar Institute and NERC’s Sea Mammal Research Unit (SMRU), University of St. Andrews, Scotland. We would like to thank H. Lund and Outi Dove for help during the fieldwork.
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Lydersen, C., Martin, A.R., Gjertz, I. et al. Satellite tracking and diving behaviour of sub-adult narwhals (Monodon monoceros) in Svalbard, Norway. Polar Biol 30, 437–442 (2007). https://doi.org/10.1007/s00300-006-0200-z
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DOI: https://doi.org/10.1007/s00300-006-0200-z