An unusual interaction between bottlenose dolphins (Tursiops truncatus) and a harbour porpoise (Phocoena phocoena)

Arda M. Tonay, Ayhan Dede, Ayaka Amaha Öztürk

Department of Marine Biology, Faculty of Aquatic Sciences, Istanbul University, TURKEY
Turkish Marine Research Foundation, P.O. Box 10, Beykoz, Istanbul, TURKEY


This short communication reports an observation of unusual non-agonistic interactions between a juvenile harbour porpoise (Phocoena phocoena) and a group of bottlenose dolphins (Tursiops truncatus) in the Marmara Sea on 25 April 2015.

Keywords: Cetacea, Istanbul Strait (Bosphorus), interspecific association

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Akkaya Baş, A., Öztürk, A.A., Öztürk, B. (2015) Selection of critical habitats for bottlenose dolphins (Tursiops truncatus) based on behavioural data, in relation to marine traffic in the Istanbul Strait, Turkey. Marine Mammal Science 31(3): 979–997.

Akkaya Bas, A., Christiansen, F., Amaha Öztürk, A., Öztürk, B., McIntosh, C. (2017) The effects of marine traffic on the behaviour of Black Sea harbour porpoises (Phocoena phocoena relicta) within the Istanbul Strait, Turkey. PLoS ONE 12(3):e0172970. doi:10.1371/journal.pone.0172970

Baird, R. W. (1998) An interaction between Pacific white-sided dolphins and a neonatal harbour porpoise. Mammalia 62: 129-133.

Cotter, M.P., Maldini, D. and Jefferson, T.A. 2011. ‘Porpicide’ in California: killing of harbor porpoises (Phocoena phocoena) by coastal bottlenose dolphins (Tursiops truncatus). Marine Mammal Science 28 (1): 1-15.

Deakos, M. H., Branstetter, B. K., Mazzuca, L., Fertl, D., Mobley, J. R., Jr. (2010) Two unusual interactions between a bottlenose dolphin (Tursiops truncatus) and a humpback whale (Megaptera novaeangliae) in Hawaiian waters. Aquatic
Mammals 36(2): 121-128.

Dede, A., Öztürk, A.A., Tonay, A. M. (2008) Cetacean Surveys in the Istanbul (Bosphorus) Strait in 2006. Abstract book of 22nd Annual Conf. European Cetacean Society, Egmond aan Zee, the Netherlands 235-236.

Dede, A., Öztürk, A.A., Kameyama, S., Tonay, A.M., Akamatsu, T. (2014a) Occurrence and behavior of delphinids and harbor porpoises at the northern end of the Istanbul Strait, Turkey. 28th Annual Conference of the European Cetacean
Society, 5-9 April 2014, Liege, Belgium. pp 52.

Dede, A., Öztürk, A.A., Akamatsu, T., Tonay, A.M., Öztürk, B. (2014b) Longtermpassive acoustic monitoring revealed seasonal and diel patterns of cetacean presence in the Istanbul Strait. Journal of the Marine Biological Association of the United Kingdom 94(6): 1195-1202.

Ford, J. K. B., Ellis, G. M., Barrett-Lennard, L. G., Morton, A. B., Palm, R. S., & Balcomb III, K. C. (1998) Dietary specialization in two sympatric populations of killer whales (Orcinus orca) in coastal British Columbia and adjacent waters. Canadian Journal of Zoology 76: 1456-1471.

Frantzis, A., Herzing, D. L. (2002) Mixed-species associations of striped dolphins (Stenella coeruleoalba), short-beaked common dolphins (Delphinus delphis), and Risso’s dolphins (Grampus griseus) in the Gulf of Corinth (Greece, Mediterranean Sea). Aquatic Mammals 28(2): 188-197.

Gol’din, P. (2004) Growth and body size of the harbour porpoise, Phocoena phocoena (Cetacea, Phocoenidae), in the Sea of Azov and the Black Sea. Vestnik zoologii 38(4): 59–73.

Gol’din, P., Gladilina, E. (2015) Small dolphins in a small sea: age, growth and life-history aspects of the Black Sea common bottlenose dolphin Tursiops truncatus. Aquatic Biology 23: 159–166.

Jepson, P.D., Baker, J.R. (1998) Bottlenose dolphins (Tursiops truncatus) as a possible cause of acute traumatic injuries in porpoises (Phocoena phocoena). Veterinary Record 143, 614e615.

Haelters, J., Everaarts, E. (2011) Two cases of physical interaction between white-beaked dolphins (Lagenorhynchus albirostris) and juvenile harbour porpoise (Phocoena phocoena) in the southern North Sea. Aquatic Mammals
37(2): 198-201.

Hastie, G.D., Wilson, B., Tufft, L.H., Thompson, P.M. (2003) Bottlenose dolphins increase breathing synchrony in response to boat traffic. Mar. Mammal Sci. 19: 74–84.

Herzing, D., Johnson, C. M. (1997) Interspecific interactions between Atlantic spotted dolphins (Stenella frontalis) and bottlenose dolphins (Tursiops truncatus) in the Bahamas, 1985-1995. Aquatic Mammals 23(2): 85-99.

Larrat, S., Measures, L.N., Lair, S. (2012) Rake marks on a harbor porpoise (Phocoena phocoena) calf suggestive of a fatal interaction with an Atlantic whitesided dolphin (Lagenorhynchus acutus). Aquatic Mammals 38(1): 86-91.

Noren, S.R. (2008) Infant carrying behaviour in dolphins: costly parental care in an aquatic environment. Functional Ecology 22(2): 284-288.

Öztürk, B., Öztürk, A.A. (1996) On the biology of the Turkish Straits System. Bulletin de l’Institut Oceanographique. Monaco. no: scpecial 17, CIESM Science Series, 2: 205-221.

Patterson, I.A.P., Reid, R.J., Wilson, B., Grellier, K., Ross H.M., Thompson P.M. (1998) Evidence for infanticide in bottlenose dolphins: an explanation for violent interactions with harbour porpoises? Proceeding of the Royal Society London 265: 1167-1170.

Ross, H. M., Wilson, B. (1996) Violent interactions between bottlenose dolphins and harbour porpoises. Proceedings of the Royal Society, 263: 283-286.

Ryan, C., Macleod, G., Dinsdale, C., Cook, S. (2017) Long-term association between a solitary common dolphin (Delphinus delphis delphis) and a harbour porpoise Phocoena phocoena). Aquatic Mammals 43(1): 113-115.

Sakai, M., Wang, D., Wang, K., Li, S., Akamatsu, T. (2011) Do porpoises choose their associates? A new method for analyzing social relationships among Cetaceans. PLoS ONE 6(12): e28836. doi:10.1371/journal.pone.0028836

Senigaglia, V., Stephanis, R, Verborgh, P., Lusseau, D. (2012) The role of synchronized swimming as affiliative and anti-predatory behavior in long-finned pilot whales. Behavioural Processes 91: 8– 14.

Spitz, J., Rousseau, Y., Ridoux, V. (2006) Diet overlap between harbour porpoise and bottlenose dolphin: An argument in favour of interference competition for food? Estuarine, Coastal and Shelf Science 70: 259e270.

TUDAV (2016) An Unusual Duo (Short movie). Turkish Marine Research Foundation Youtube Channel. (accessed 26.10.2017)

Wilson, A.D.M., Krause, J. (2013) Repeated non-agonistic interactions between a bottlenose dolphin (Tursiops truncatus) and sperm whales (Physeter macrocephalus) in Azorean waters. Aquatic Mammals 39(1): 8