Andvik, C,  Jourdain, E,  Ruus, A, Lyche, J. L,  Karoliussen, R, Borgå, K.  Preying on seals pushes killer whales from Norway above pollution effects thresholds. Scientific Reports 2020; 10: 11888. doi: 10.1038/s41598-020-68659-y

Jourdain, E,  Andvik, C,  Karoliussen, R,  Ruus, A,  Vongraven, D,  Borgå, K.  Isotopic niche differs between seal and fish‐eating killer whales (Orcinus orca) in northern Norway. Ecology and Evolution 2020; 00: 1-13. 

doi: 10.1002/ece3.6182.

Jourdain, E., Ugarte, F., Víkingsson, G. A., Samarra, F. I. P., Ferguson S. H., Lawson, J., Vongraven, D. and Desportes, G. (2019). North Atlantic killer whale Orcinus orca populations: a review of current knowledge and threats to conservation. Mammal Review. doi: 10.1111/mam.12168.

Jourdain, E., Karoliussen, R., de Vos, J., Zakharov, S. and Tougard, C. (2019). Killer whales (Orcinus orca) feeding on lumpfish (Cyclopterus lumpus) in Northern Norway. Marine Mammal Science 2019; 1-14. doi: 10.1111/mms.12618.

Jourdain, E., Karoliussen, R., Curé, C., Massenet, M., Barrett-Lennard, L. and Ellis, G. (2019). A case of natural killer whale (Orcinus orca) entrapment in Northern Norway: from assessment to rescue. Aquatic Mammals, 45(1), 14-20. doi: 10.1578/AM.45.1.2019.14.

Alves, F., Towers, J. R., Baird, R. W., Bearzi, G., Bonizzoni, S., Ferreira, R., Halicka, Z., Alessandrini, A., Kopelman, A. H., Yzoard, C., Rasmussen, M. H., Bertulli, C. G., Jourdain, E., Gullan, A., Rocha, D., Hupman, K., Mrusczok, M.-T., Samarra, F. I. P., Magalhães, S., Weir, C. R., Ford, J. K. B. and Dinis, A. (2017). The incidence of bent dorsal fins in free-ranging cetaceans. Journal of Anatomy. doi: 10.1111/joa.12729.

Jourdain, E., Samarra, F. I. P., Tavares, S. B. and Karoliussen, R. (2017). Incidence of probable vertebral column deformities in Norwegian and Icelandic killer whales (Orcinus orca). Aquatic Mammals, 43(6), 682-690. doi: 10.1578/AM.43.6.2017.682.

Jourdain, E., Vongraven, D., Bisther, A., and Karoliussen, R. (2017). First longitudinal study of seal-feeding killer whales (Orcinus orca) in Norwegian coastal watersPloS One, 12(6), e0180099. doi: 10.1371/journal.pone.0180099.

Jourdain, E. and Vongraven D (2017). Humpback whale (Megaptera novaeangliae) and killer whale (Orcinus orca) feeding aggregations for foraging on herring (Clupea harengus) in Northern Norway. Mammalian Biology - Zeitschrift für Säugetierkunde, 86, 27-32. doi: 10.1016/j.mambio.2017.03.006.

Jourdain, E., Andvik, C., Karoliussen, R., Tougard, C., Vongraven, D., Ruus, A., and Borgå, K. Variations in ecological niche in Norwegian killer whales (Orcinus orca) inferred from dietary descriptors and observational evidence. Poster session presented at the World Marine Mammal Conference 2019, Barcelona, Spain.

Andvik, C., Jourdain, E., Ruus, A., Lyche, J. L., Karoliussen, R., Borgå, K. Higher levels of organohalogen contaminant and mercury levels in seal-eating killer whales (Orcinus orca) than fish-eating killer whales in northern Norway. Poster session presented at the World Marine Mammal Conference 2019, Barcelona, Spain.

Jourdain, E. and Vongraven, D. (2016). Killer whale predation on pinnipeds in Northern Norway: novel insights into the ecology of Norwegian killer whales. Poster session presented at Annual Conference of the European Cetacean Society 2016, Madeira, Portugal.

Jourdain, E. and Karoliussen, R. (2018). Identification Catalogue of Norwegian killer whales: 2007-2018.  

doi: 10.6084/m9.figshare.4205226. Download pdf.

Goh T. (2019). Investigating variation in survivorship of northern Norwegian killer whales from 1986-2018 during a period of rapid ecosystem change. MSc Thesis. University of St Andrews, UK.

McEnally C. (2019). The effect of dietary preference on the levels of organohalogen contaminants and mercury in Norwegian killer whales (Orcinus orca). MSc Thesis. University of Oslo, Norway.

Matika A.F.  (2019). Dive characteristics, foraging energetics and prey profitability in northern Norwegian orca. BSc Thesis. University of St Andrews, UK.

Giampaoletti E. (2018). Population dynamic and site fidelity of killer whales (Orcinus orca) in Norwegian waters during seasons 2012-2018. Bachelor Thesis. University of Bologna, Italy.

Ruusuvuori A. (2017). Fishery related injuries to cetaceans off the Norwegian coast. Bachelor Thesis. University of Halmstad, Finland.

Reckendorf A, Ludes- Wehrmeister E, Wohlsein P, Tiedemann R, Siebert U, Lehnert K (2018). First record of Halocercus sp. (Pseudaliidae) lungworm infections in two stranded neonatal orcas (Orcinus orca). Parasitology 1–5.






Norwegian Orca Survey is the leading research organisation on Norwegian killer whales. Using ground-breaking technologies, and being year-round in the field, we deliver innovative knowledge with results available from scientific publications. We also respond in animal welfare cases. 


Norwegian Orca Survey

Andenes, Norway

+47 950 14 960 (English speaking)

+47 949 83 803 (Norwegian speaking)

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