Abundance of whales in West and East Greenland in summer 2015

  • Rikke Guldborg Hansen Greenland Institute of Natural Resources
  • Tenna K. Boye Greenland Institute of Natural Resources
  • Rasmus S. Larsen Greenland Institute of Natural Resources. University of Copenhagen
  • Nynne H. Nielsen Greenland Institute of Natural Resources
  • Outi Tervo Greenland Institute of Natural Resources
  • Rasmus D. Nielsen Aarhus University
  • Marianne H. Rasmussen University of Iceland
  • Mikkel H. S. Sinding Greenland Institute of Natural Resources. Trinity College Dublin
  • Mads Peter Heide-Jørgensen Greenland Insitute of Natural Resources. Trinity College Dublin
Keywords: surveys, marine mammals, whales, North Atlantic, abundance, Greenland, cetaceans, trends, aerial surveys

Abstract

An aerial line transect survey of whales in West and East Greenland was conducted in August-September 2015. The survey covered the area between the coast of West Greenland and offshore (up to 100 km) to the shelf break. In East Greenland, the survey lines covered the area from the coast up to 50 km offshore crossing the shelf break. A total of 423 sightings of 12 cetacean species were obtained and abundance estimates were developed for common minke whale, (Balaenoptera acutorostrata) (32 sightings), fin whale (Balaenoptera physalus) (129 sightings), humpback whale (Megaptera novaeangliae) (84 sightings), harbour porpoise (Phocoena phocoena) (55 sightings), long-finned pilot whale, (Globicephala melas) (42 sightings) and white-beaked dolphin (Lagenorhynchus albirostri) (50 sightings). The developed at-surface abundance estimates were corrected for both perception bias and availability bias if possible. Data on surface corrections for minke whales and harbour porpoises were collected from whales instrumented with satellite-linked time-depth-recorders. Options for estimation methods are presented and the preferred estimates are: minke whales: 5,095 (95% CI: 2,171-11,961) in West Greenland and 2,762 (95% CI: 1,160-6,574) in East Greenland, fin whales: 2,215 (95% CI: 1,017-4,823) in West Greenland and 6,440 (95% CI: 3,901-10,632) in East Greenland, humpback whales: 993 (95% CI: 434-2,272) in West Greenland and 4,223 (95% CI: 1,845-9,666) in East Greenland, harbour porpoises: 83,321 (95% CI: 43,377-160,047) in West Greenland and 1,642 (95% CI: 319-8,464) in East Greenland, pilot whales: 9,190 (95% CI: 3,635-23,234) in West Greenland and 258 (95% CI: 50-1,354) in East Greenland, white-beaked dolphins 15,261 (95% CI: 7,048-33,046) in West Greenland and 11,889 (95% CI: 4,710-30,008) in East Greenland. The abundance of cetaceans in coastal areas of East Greenland has not been estimated before, but the limited historical information from the area indicates that the achieved abundance estimates were remarkably high. When comparing the abundance estimates from 2015 in West Greenland with a similar survey conducted in 2007, there is a clear trend towards lower densities in 2015 for the three baleen whale species and white-beaked dolphins. Harbour porpoises and pilot whales, however, did not show a similar decline. The decline in baleen whale and white-beaked dolphin abundance is likely due to emigration to the East Greenland shelf areas where recent climate driven changes in pelagic productivity may have accelerated favourable conditions for these species.

References

Borchers, D. L., Laake, J. L., Southwell, C., & Paxton, C. G. M. (2005). Accommodating unmodeled heterogeneity in double-observer distance sampling surveys. Biometrics, 62, 372-378. doi:https://doi.org/10.1111/j.1541-0420.2005.00493.x

Born, E. W. (1983). Havpattedyr og havfugle i Scoresby Sund: Fangst og forekomst. Retrieved from Henningsen Allé 58, 2900 Hellerup:

Buckland, S. T., Anderson, D. R., Burnham, K. P., Laake, J. L., Borchers, D. L., & Thomas, L. (2001). Introduction to distance sampling: Estimating abundance of biological populations (S. T. Buckland Ed.). Oxford, UK: Oxford University Press.

Hansen, R. G., & Heide-Jørgensen, M. P. (2013). Abundance and spatial trends of long-finned pilot whales, white-beaked dolphins and harbour porpoises in West Greenland. Marine Biology, 160(11), 2929-2941. doi:https://doi.org/10.1007/s00227-013-2283-8

Heide-Jørgensen, M. P., Bloch, D., Stefansson, E., Mikkelsen, B., Ofstad, L. H., & Dietz, R. (2002). Diving behaviour of long-finned pilot whales Globicephala melas around the Faroe Islands. Wildlife Biology, 8(4), 307-313. doi:https://doi.org/10.2981/wlb.2002.020

Heide-Jørgensen, M. P., Borchers, D. L., Witting, L., Laidre, K. L., Simon, M. J., Rosing-Asvid, A., & Pike, D. G. (2008). Estimates of large whale abundance in West Greenland waters from an aerial survey in 2005. Journal of Cetacean Research and Management, 10(2), 119-129.

Heide-Jørgensen, M. P., Kleivane, L., Øien, N., Laidre, K. L., & Jensen, M. V. (2001). A new technique for deploying satellite transmitters on baleen whales: tracking a blue whale (Balaenoptera musculus) in the North Atlantic. Marine Mammal Science, 17, 949-954. doi:https://doi.org/10.1111/j.1748-7692.2001.tb01309.x

Heide-Jørgensen, M. P., & Laidre, K. L. (2015). Surfacing time, availability bias and abundance of humpback whales in West Greenland. Journal of Cetacean Research and Management, 15, 1-8.

Heide-Jørgensen, M. P., Laidre, K. L., Hansen, R. G., Burt, M. L., Simon, M., Borchers, D. L., . . . Teilmann, J. (2012). Rate of increase and current abundance of humpback whales in West Greenland. Journal of Cetacean Research and Management, 12, 1-14.

Heide-Jørgensen, M. P., Laidre, K. L., Simon, M., Burt, M. L., Borchers, D. L., & Rasmussen, M. (2010). Abundance of fin whales in West Greenland in 2007. Journal of Cetacean Research and Management, 11(2), 83-88.

Heide-Jørgensen, M. P., Nielsen, N. H., Teilmann, J., & Leifsson, P. S. (2017). Long-term tag retention on two species of small cetaceans. Marine Mammal Science, 33(3), 713-725. doi:https://doi.org/10.1111/mms.12394

Heide-Jørgensen, M. P., Nordøy, E. S., Øien, N., Folkow, L. P., Kleivane, L., Blix, A. S., . . . Laidre, K. L. (2001). Satellite tracking of minke whales (Balaenoptera acutorostrata) off the coast of northern Norway. Journal of Cetacean Research and Management, 3(2), 175-178.

Heide-Jørgensen, M. P., & Simon, M. (2007). Cue rates for common minke, fin and humpback whales in West Greenland. Journal of Cetacean Research and Management, 9(3), 211-214.

Heide-Jørgensen, M. P., Simon, M. J., & Laidre, K. L. (2007). Estimates of large whale abundance in Greenlandic waters from a ship-based survey in 2005. Journal of Cetacean Research and Management, 9(2), 95-104.

Heide-Jørgensen, M. P., Witting, L., Laidre, K. L., Hansen, R. G., & Rasmussen, M. (2010). Fully corrected estimates of common minke whale abundance in West Greenland in 2007. Journal of Cetacean Research and Management, 11(2), 75-82.

Holm, G., & Petersen, J. (1921). Angmagssalik distrikt. Meddelelser om Grønland, 61, 560-561.

IWC. (1992). Report of the Comprehensive Assessment Special Meeting on North Atlantic Fin Whales. Report of the International Whaling Commission, 42, 595-644.

Jansen, T., Post, S., Kristiansen, T., Óskarsson, G. J., Boje, J., MacKenzie, B. R., . . . Siegstad, H. (2016). Ocean warming expands habitat of a rich natural resource and benefits a national economy. Ecological Applications, 26(7). doi:https://doi.org/10.1002/eap.1384

Jensen, A. S. (1928). The fauna of Greenland: University of Copenhagen.

Kennedy, A. S., Zerbini, A. N., Vásquez, O. V., Gandilhon, N., Clapham, P. J., & Adam, O. (2014). Local and migratory movements of humpback whales (Megaptera novaeangliae) satellite-tracked in the Nort Atlantic Ocean. Canadian Journal of Zoology, 92(1), 9-18. doi:https://doi.org/10.1139/cjz-2013-0161

Kern, S., Kaleschke, L., & Spreen, G. (2010). Climatology of the Nordic (Irminger, Greenland, Barents, Kara and White/Pechora) Seas ice cover based on 85 GHz satellite microwave radiometry: 1992-2008. Tellus A: Dynamic Meterology and Oceanography, 62(4), 411-434. doi:https://doi.org/10.1111/j.1600-0870.2010.00457.x

Laake, J. L., & Borchers, D. L. (2004). Methods for incomplete detection at distance zero. Oxford, UK: Oxford University Press.

Laake, J. L., Calambokidis, J., Osmek, S. D., & Rugh, D. J. (1997). Probability of Detecting Harbor Porpoise from Aerial Surveys: Estimating g(0). Journal of Wildlife Management, 61(1), 63-75. doi:https://doi.org/10.2307/3802415

Larsen, F. (1995). Abundance of minke and fin whales off West Greenland, 1993. Report of the International Whaling Commission, 45, 365-370.

Magnusson, W. E., Caughley, G. J., & Grigg, G. C. (1978). A Double-Survey Estimate of Population Size from Incomplete Counts. Journal of Wildlife Management, 42(1), 174-176. doi:https://doi.org/10.2307/3800708

Mate, B., Mesecar, R., & Lagerquist, B. (2007). The evolution of satellite-monitored radio tags for large whales: One laboratory's experience. Deep-Sea Research Part Ii-Topical Studies in Oceanography, 54(3-4), 224-247. doi:https://doi.org/10.1016/j.dsr2.2006.11.021

Nielsen, N. H., Teilmann, J., Sveegaard, S., Hansen, R. G., Sinding, M. H. S., Dietz, R., & Heide-Jørgensen, M. P. (2018). Oceanic movements, site fidelity and deep diving in harbour porpoises from Greenland show limited similarities to animals from the North Sea. Marine Ecology Progress Series, 597, 259-272. doi:https://doi.org/10.3354/meps12588

Rasmussen, M. H., Akamatsu, T., Teilmann, J., Vikingsson, G., & Miller, L. A. (2013). Biosonar, diving and movements of two tagged white-beaked dolphin in Icelandic waters. Deep-Sea Research Part Ii-Topical Studies in Oceanography, 88-89, 97-105. doi:https://doi.org/10.1016/j.dsr2.2012.07.011

Scoresby, W. (1823). Journal of a voyage to the northern whale-fishery; including researches and discoveries on the eastern coast of West Greenland, made in the summer of 1822, in the ship Baffin of Liverpool. Whitby, UK: Caedmon reprints.

Silva, M. A., Prieto, R., Jonsen, I., Baumgartner, M. F., & Santos, R. S. (2013). North Atlantic Blue and Fin Whales Suspend Their Spring Migration to Forage in Middle Latitudes: Building up Energy Reserves for the Journey? PLoS ONE, 8(10). doi:https://doi.org/10.1371/journal.pone.0076507

Thomas, L., Buckland, S. T., Rexstad, E. A., Laake, J. L., Strindberg, S., Hedley, S. L., . . . Burnham, K. P. (2010). Distance software: design and analysis of distance sampling surveys for estimating population size. Journal of Applied Ecology, 47(1), 5-14. doi:https://doi.org/10.1111/j.1365-2664.2009.01737.x

Vikingsson, G. A., Pike, D. G., Desportes, G., Øien, N., Gunnlaugsson, T., & Bloch, D. (2009). Distribution and abundance of fin whales (Balaenoptera physalus) in the Northeast and Central Atlantic as inferred from the North Atlantic Sightings Surveys 1987-2001. NAMMCO Scientific Publications, 7, 49-72. doi:https://doi.org/10.7557/3.2705

Winge, H. (1902). Grønlands Pattedyr. Meddelelser om Grønland, 12, 319-521.

Published
2019-03-26
How to Cite
Hansen, R. G., Boye, T. K., Larsen, R. S., Nielsen, N. H., Tervo, O., Nielsen, R. D., Rasmussen, M. H., Sinding, M. H. S., & Heide-Jørgensen, M. P. (2019). Abundance of whales in West and East Greenland in summer 2015. NAMMCO Scientific Publications, 11. https://doi.org/10.7557/3.4689