Downloaded from https://academic.oup.com/icesjms/advance-article-abstract/doi/10.1093/icesjms/fsy118/5103434 by Deakin University user on 20 September 2018 ICES Journal of Marine Science (2018), doi:10.1093/icesjms/fsy118 Movements and dive behaviour of a toothfish-depredating killer and sperm whale Jared R. Towers1*,‡, Paul Tixier2, Katherine A. Ross3,‡, John Bennett4, John P. Y. Arnould2, Robert L. Pitman5, and John W. Durban5 1Bay Cetology, Box 554, Alert Bay, BC V0N 1A0, Canada 2School of Life and Environmental Sciences, Deakin University, Burwood, VIC 3125, Australia 3Falklands Conservation, Stanley, Falkland Islands 4Sanford Seafood, Hall Street, North Mole, Timaru 7910, New Zealand 5Southwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 8901 La Jolla Shores Drive, La Jolla, CA 92037, USA *Corresponding author: tel: þ1 250 902 1779; e-mail:
[email protected]. Towers, J. R., Tixier, P., Ross, K. A., Bennett, J., Arnould, J. P. Y., Pitman, R. L., and Durban, J. W. Movements and dive behaviour of a toothfish-depredating killer and sperm whale. – ICES Journal of Marine Science, doi:10.1093/icesjms/fsy118. Received 15 May 2018; revised 24 July 2018; accepted 8 August 2018. Depredation of demersal longlines by killer and sperm whales is a widespread behaviour that impacts fisheries and whale populations. To bet- ter understand how depredating whales behave in response to fishing activity, we deployed satellite-linked location and dive-profile tags on a sperm and killer whale that were depredating Patagonian toothfish from commercial longlines off South Georgia. The sperm and killer whale followed one fishing vessel for >180 km and >300 km and repeatedly depredated when longlines were being retrieved over periods of 6 and 7 d, respectively.