Polar Biology

, Volume 41, Issue 10, pp 2053–2063 | Cite as

Baffin Bay narwhal (Monodon monoceros) select bathymetry over sea ice during winter

  • Krista A. KenyonEmail author
  • David J. Yurkowski
  • Jack Orr
  • David Barber
  • Steven H. Ferguson
Original paper


Arctic pack ice structure and extent have been changing due to warming. Thus, understanding important habitat features for marine mammals that depend on sea ice, such as narwhal (Monodon monoceros), during winter will provide insight into impacts of future changes within the pack ice. The objective of this study was to determine narwhal habitat selection for bathymetry, sea ice concentration, thickness, and floe size during the winter season. Nineteen narwhals were equipped with SPLASH tags in Admiralty Inlet and Eclipse Sound (2009–2011), with 50% of the transmitters lasting until April allowing for analysis of the entire winter season. Generalized linear mixed models indicated that both sexes selected similar bathymetric habitat likely corresponding to higher prey densities of Greenland halibut. This preference for prey habitat occurred regardless of the mobile pack ice structure or amount of open water at the ocean surface. In addition, we found evidence of a potential relationship between increased winter movements and decreased ice extent over the 2009–2011 period. Together these findings suggest that changes to sea ice structure likely will not negatively impact narwhal directly in the winter. However, indirect effects of changing sea ice, such as changing prey densities and distribution, increased presence of killer whales (Orcinus orca) as predators, increased interspecies competition for prey, and increased anthropogenic activities could influence winter habitat selection of narwhal. In conclusion, the extensive winter movements indicate that narwhal may be more flexible in their selection of winter habitat than previously believed.


Bathymetry Habitat use Greenland halibut Migration Animal telemetry Winter sea ice 



We thank the Pond Inlet and Arctic Bay Hunters and Trappers Organizations for their support in live capturing and tagging of narwhals. Logistical support was provided by Polar Continental Shelf Program. This study was funded by Nunavut Wildlife Management Board, World Wildlife Fund Canada (Grant No. G-1215-141-02-D), Natural Sciences and Engineering Research Council (Grant No. CGS M), ArcticNet Network of Centres of Excellence, University of Manitoba (Grant Nos. 45525, TMSA), and Fisheries and Oceans Canada. We thank the Canada Excellence Research Chair, the Canada Research Chair, the Arctic Science Partnership, and the Center of Earth Observation Science for their support. DJY was supported by the W. Garfield Weston Foundation.

Compliance with ethical standards

Ethical approval

Animal handling procedures were approved by the Freshwater Institute Animal Care Committee under Animal Use Protocols FWI-ACC-2009-024, FWI-ACC-2010-008, and FWI-ACC-2011-016. Licence to Fish for Scientific Purposes from the Minister of Fisheries and Oceans were obtained. Licence Numbers were S-09/10-1015-NU, S-10/11-1029-NU, and S-11/12/1039-NU.


  1. Asplin MG, Scharien R, Else B et al (2014) Implications of fractured Arctic perennial ice cover on thermodynamics and dynamic sea ice processes. J Geophys Res Ocean 119:2327–2343. CrossRefGoogle Scholar
  2. Assmy P, Fernández-Méndez M, Duarte P et al (2017) Leads in Arctic pack ice enable early phytoplankton blooms below snow-covered sea ice. Sci Rep 7:40850. CrossRefPubMedPubMedCentralGoogle Scholar
  3. Bartoń K (2016) MuMIN: multi-model inference. Technical report, R package version 1.15.6
  4. Bates D, Mächler M, Bolker BM, Walker SC (2015) Fitting linear mixed-effects models using lme4. J Stat Softw 67:1–48. CrossRefGoogle Scholar
  5. Bjørke H (2001) Predators of the squid Gonatus fabricii (Lichtenstein) in the Norwegian Sea. Fish Res 52:113–120. CrossRefGoogle Scholar
  6. Boyce MS, Vernier PR, Nielsen SE, Schmiegelow FKA (2002) Evaluating resource selection functions. Ecol Model 157:281–300. CrossRefGoogle Scholar
  7. Breed GA, Matthews CJD, Marcoux M et al (2017) Sustained disruption of narwhal habitat use and behavior in the presence of Arctic killer whales. Proc Natl Acad Sci USA 114:2628–2633. CrossRefPubMedGoogle Scholar
  8. Chambellant M, Stirling I, Ferguson SH (2013) Temporal variation in western Hudson Bay ringed seal Phoca hispida diet in relation to environment. Mar Ecol Prog Ser 481:269–287. CrossRefGoogle Scholar
  9. Clavel J, Julliard R, Devictor V (2010) Worldwide decline of specialist species: toward a global functional homogenization? Front Ecol Environ 9:222–228. CrossRefGoogle Scholar
  10. Costa DP, Robinson PW, Arnould JPY et al (2010) Accuracy of ARGOS locations of pinnipeds at-sea estimated using Fastloc GPS. PLoS ONE 5:e8677. CrossRefPubMedPubMedCentralGoogle Scholar
  11. Dietz R, Heide-Jørgensen MP, Richard P et al (2008) Movements of narwhals (Monodon monoceros) from Admiralty Inlet monitored by satellite telemetry. Polar Biol 31:1295–1306. CrossRefGoogle Scholar
  12. Ferguson SH, Dueck L, Loseto LL, Luque SP (2010) Bowhead whale Balaena mysticetus seasonal selection of sea ice. Mar Ecol Prog Ser 411:285–297. CrossRefGoogle Scholar
  13. Finley KJ, Gibb EJ (1982) Summer diet of the narwhal (Monodon monoceros) in Pond Inlet, northern Baffin Island. Can J Zool 60:3353–3363. CrossRefGoogle Scholar
  14. Gaston AJ, Elliott KH (2014) Seabird diet changes in northern Hudson Bay, 1981–2013, reflect the availability of schooling prey. Mar Ecol Prog Ser 513:211–223. CrossRefGoogle Scholar
  15. Hazel J (2009) Evaluation of fast-acquisition GPS in stationary tests and fine-scale tracking of green turtles. J Exp Mar Bio Ecol 374:58–68. CrossRefGoogle Scholar
  16. Heide-Jørgensen MP, Richard PR, Dietz R, Laidre KL (2013) A metapopulation model for Canadian and West Greenland narwhals. Anim Conserv 16:331–343. CrossRefGoogle Scholar
  17. Higdon JW, Ferguson SH (2009) Loss of Arctic sea ice causing punctuated change in sightings of killer whales (Orcinus orca) over the past century. Ecol Appl 19:1365–1375. CrossRefPubMedGoogle Scholar
  18. Hopkins MA, Thorndike AS (2006) Floe formation in Arctic sea ice. J Geophys Res Ocean 111:C11S23. CrossRefGoogle Scholar
  19. Hothorn T, Bretz F, Westfall P (2008) Simultaneous inference in general parametric models. Biom J 50:346–363. CrossRefPubMedGoogle Scholar
  20. Jakobsson M, Mayer L, Coakley B et al (2012) The international bathymetric chart of the Arctic Ocean (IBCAO) version 3.0. Geophys Res Lett 39:L12609. CrossRefGoogle Scholar
  21. Johnson DH (1980) The comparison of usage and availability measurements for evaluating resource preference. Ecology 61:65–71. CrossRefGoogle Scholar
  22. Johnson CJ, Nielsen SE, Merrill EH et al (2006) Resource selection functions based on use—availability data: theoretical motivation and evaluation methods. J Wildl Manage 70:347–357. CrossRefGoogle Scholar
  23. Jørgensen OA (1997) Movement patterns of Greenland halibut, Reinhardtius hippoglossoides (Walbaum), at West Greenland, as inferred from trawl survey distribution and size data. J Northwest Atl Fish Sci 21:23–37. CrossRefGoogle Scholar
  24. Jørgensen OA (2011) Bottom trawl survey in Baffin Bay, NAFO Divisions 1A, 2010. NAFO SCR Doc No. 11/010:16 pGoogle Scholar
  25. Jørgensen OA (2013) Distribution of small Greenland halibut in Baffin Bay. Technical Report no. 90. Greenland Institute of Natural ResourcesGoogle Scholar
  26. Jørgensen OA, Hvingel C, Møller PR, Treble MA (2005) Identification and mapping of bottom fish assemblages in Davis Strait and southern Baffin Bay. Can J Fish Aquat Sci 62:1833–1852. CrossRefGoogle Scholar
  27. Kristensen TK (1984) Biology of the squid Gonatus fabricii (Lichtenstein, 1818) from West Greenland waters. Meddelelser om Gronl Biosci 13:1–20Google Scholar
  28. Laidre KL, Heide-Jørgensen MP (2005a) Arctic sea ice trends and narwhal vulnerability. Biol Conserv 121:509–517. CrossRefGoogle Scholar
  29. Laidre KL, Heide-Jørgensen MP (2005b) Winter feeding intensity of narwhals (Monodon monoceros). Mar Mamm Sci 21:45–57. CrossRefGoogle Scholar
  30. Laidre KL, Heide-Jørgensen MP (2011) Life in the lead: extreme densities of narwhals Monodon monoceros in the offshore pack ice. Mar Ecol Prog Ser 423:269–278. CrossRefGoogle Scholar
  31. Laidre KL, Heide-Jørgensen MP, Dietz R et al (2003) Deep-diving by narwhals Monodon monoceros: differences in foraging behavior between wintering areas? Mar Ecol Prog Ser 261:269–281. CrossRefGoogle Scholar
  32. Laidre KL, Heide-Jørgensen MP, Logdson ML et al (2004) Seasonal narwhal habitat associations in the high Arctic. Mar Biol 145:821–831. CrossRefGoogle Scholar
  33. Laidre KL, Stirling I, Lowry LF et al (2008) Quanifying the sensitivity of Arctic marine mammals to climate-induced habitat change. Ecol Appl 18:S97–S125. CrossRefPubMedGoogle Scholar
  34. Lu CC, Clarke MR (1975) Vertical distribution of cephalopods at 40°N, 53°N and 60°N at 20°W in the North Atlantic. J Mar Bio Assoc UK 55:143–163CrossRefGoogle Scholar
  35. Marcoux M, McMeans BC, Fisk AT, Ferguson SH (2012) Composition and temporal variation in the diet of beluga whales, derived from stable isotopes. Mar Ecol Prog Ser 471:283–291. CrossRefGoogle Scholar
  36. Munday PL (2004) Habitat loss, resource specialization, and extinction on coral reefs. Glob Chang Biol 10:1642–1647. CrossRefGoogle Scholar
  37. Orr JR, Joe R, Evic D (2001) Capturing and handling of white whales (Delphinapterus lencas) in the Canadian Arctic for instrumentation and release. Arctic 54:299–304. CrossRefGoogle Scholar
  38. Park D-SR, Lee S, Feldstein SB (2015) Attribution of the recent winter sea ice decline over the Atlantic sector of the Arctic Ocean. J Clim 28:4027–4033. CrossRefGoogle Scholar
  39. Parkinson CL, Cavalieri DJ (2008) Arctic sea ice variability and trends, 1979–2006. J Geophys Res Ocean 113:C07003. CrossRefGoogle Scholar
  40. Perovich DK, Jones KF (2014) The seasonal evolution of sea ice floe size distribution. J Geophys Res Ocean 119:8767–8777. CrossRefGoogle Scholar
  41. Provencher JF, Gaston AJ, O’Hara PD, Gilchrist HG (2012) Seabird diet indicates changing Arctic marine communities in eastern Canada. Mar Ecol Prog Ser 454:171–182. CrossRefGoogle Scholar
  42. Reeves RR, Ewins PJ, Agbayani S et al (2014) Distribution of endemic cetaceans in relation to hydrocarbon development and commercial shipping in a warming Arctic. Mar Policy 44:375–389. CrossRefGoogle Scholar
  43. Richter-Menge JA, McNutt LS, Overland JE, Kwok R (2002) Relating arctic pack ice stress and deformation under winter conditions. J Geophys Res 107:8040. CrossRefGoogle Scholar
  44. Slatyer RA, Hirst M, Sexton JP (2013) Niche breadth predicts geographical range size: a general ecological pattern. Ecol Lett 16:1104–1114. CrossRefPubMedGoogle Scholar
  45. Smith SD, Muench RD, Pease CH (1990) Polynyas and leads: an overview of physical processes and environment. J Geophys Res 95:9461–9479. CrossRefGoogle Scholar
  46. Travis JMJ (2003) Climate change and habitat destruction: a deadly anthropogenic cocktail. Proc R Soc B 270:467–473. CrossRefPubMedGoogle Scholar
  47. Treble MA (2015) Report on Greenland halibut caught during the 2014 trawl survey in Divisions 0A and 0B. Serial No.:1–14Google Scholar
  48. Wang M, Overland JE (2012) A sea ice free summer Arctic within 30 years: an update from CMIP5 models. Geophys Res Lett 39:L18501. CrossRefGoogle Scholar
  49. Watt CA, Ferguson SH (2015) Fatty acids and stable isotopes (δ13C and δ15N) reveal temporal changes in narwhal (Monodon monoceros) diet linked to migration patterns. Mar Mamm Sci 31:21–44. CrossRefGoogle Scholar
  50. Watt CA, Orr JR, Heide-Jørgensen MP et al (2015) Differences in dive behaviour among the world’s three narwhal Monodon monoceros populations correspond with dietary differences. Mar Ecol Prog Ser 525:273–285. CrossRefGoogle Scholar
  51. Witt MJ, Åkesson S, Broderick AC et al (2010) Assessing accuracy and utility of satellite-tracking data using Argos-linked Fastloc-GPS. Anim Behav 80:571–581. CrossRefGoogle Scholar
  52. Yurkowski DJ, Ferguson SH, Semeniuk CAD et al (2016) Spatial and temporal variation of an ice-adapted predator’s feeding ecology in a changing Arctic marine ecosystem. Oecologia 180:631–644. CrossRefPubMedGoogle Scholar
  53. Yurkowski DJ, Hussey NE, Fisk AT et al (2017) Temporal shifts in intraguild predation pressure between beluga whales and Greenland halibut in a changing Arctic. Biol Lett. CrossRefPubMedGoogle Scholar
  54. Zumholz K, Frandsen RP (2006) New information on the life history of cephalopods off west Greenland. Polar Biol 29:169–178. CrossRefGoogle Scholar
  55. Zuur AF, Ieno EN, Walker NJ et al (2009) Mixed effects models and extensions in ecology with R. Springer, New York, pp 1–574Google Scholar

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Geography and Environment, Center of Earth Observation ScienceUniversity of ManitobaWinnipegCanada
  2. 2.Department of Biological SciencesUniversity of ManitobaWinnipegCanada
  3. 3.Department of Fisheries and OceansFreshwater InstituteWinnipegCanada

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