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Opportunistic sightings of killer whales from Scottish pelagic trawlers fishing for mackerel and herring off North Scotland (UK) between 2000 and 2006

Published online by Cambridge University Press:  07 February 2007

Patricia L. Luque ,
Craig G. Davis ,
David G. Reid ,
Jianjun Wang  and
Graham J. Pierce
Patricia L. Luque
Affiliation:
School of Biological Sciences (Zoology), University of Aberdeen, Tillydrone Avenue, Aberdeen, AB24 2TZ, UK
Craig G. Davis
Affiliation:
Fisheries Research Services Marine Laboratory, PO Box 101, Victoria Road, Aberdeen, AB11 9DB, UK
David G. Reid
Affiliation:
Fisheries Research Services Marine Laboratory, PO Box 101, Victoria Road, Aberdeen, AB11 9DB, UK
Jianjun Wang
Affiliation:
School of Biological Sciences (Zoology), University of Aberdeen, Tillydrone Avenue, Aberdeen, AB24 2TZ, UK
Graham J. Pierce
Affiliation:
School of Biological Sciences (Zoology), University of Aberdeen, Tillydrone Avenue, Aberdeen, AB24 2TZ, UK
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Abstract

Killer whale (Orcinus orca) encounters from commercial pelagic trawlers as well as other types of vessels have been documented in several regions of the northeast Atlantic; however, very little published information is available regarding such encounters in mackerel (Scomber scombrus) and herring (Clupea harengus) fisheries, in the waters between northern Scotland and Norway. Mackerel and herring are the two main fish species targeted by the Scottish pelagic fleet, primarily during October to March and June to September, respectively. Encounters with killer whales were recorded during January and February 2006 by observers on a pelagic trawler fishing for mackerel in this area. These recent data, along with historical records collected since 2000, demonstrate the existence of frequent encounters between commercial pelagic trawlers and killer whales. We describe the foraging behaviour displayed by the whales during fishing operations. Killer whales approached the vessels during retrieval of the net, and remained there until this was completed. They were sometimes sighted during steaming and towing, although there was no observed contact with the boat or net at these times. There is no evidence that the presence of killer whales reduced the amount of fish caught by the trawlers or that killer whales ever become entangled in the nets. We suggest that, during the mackerel fishing season, the whales may obtain a significant proportion of their daily energy requirements from this source.

Keywords

Orcinus orcaScomber scombrusClupea harenguspelagic trawler fisheryShetland and Orkney Islands.
Type
Research Article
Information
Aquatic Living Resources , Volume 19 , Issue 4 , October 2006 , pp. 403 - 410
Copyright
© EDP Sciences, IFREMER, IRD, 2007

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References

Anonymous, 2006, Report of the Working Group on Marine Mammal Ecology (WGMME), 30 Jan.–2 Feb. 2006, ICES Advisory Committee on Ecosystems, ACE: 06. International Council for the Exploration of the Sea, Copenhagen.
Baird, R.W., McSweeney, D.J., Bane, C., Barlow, J., Salden, D.R., Antoine, L.K., LeDuc, R.G., Webster, D.L., 2006, Killer whales in Hawaiian Waters: information on population identity and feeding habits. Pac. Sci. 60, 523–530. CrossRef
Bigg, M.A., 1982, An assessment of killer whale (Orcinus orca) stocks off Vancouver Island. British Columbia. Rep. Int. Whal. Comm. 32, 655–666.
Caldwell, D.K., Caldwell, M.C., 1969, Addition of the leatherback sea turtle to the known prey of the killer whale (Orcinus orca). J. Mamm. 50, 636. CrossRef
Christensen, I., 1988, Distribution, movements and abundance of killer whales Orcinus orca, in Norwegian coastal waters, 1982 1987, based on questionnaire survey. Rit. Fiskid. 11, 79–88.
Couperus, A.S., 1993, Killer whales and pilot whales near trawlers east of Shetland. Sula 7, 41–52.
Dahlheim, M.E., 1981, A review of the biology and exploitation of the killer whales (Orcinus orca) with comments on recent sightings from Antarctica. Rep. Int. Whal. Comm. 31, 541–546.
Dahlheim M.E., Heyning J.E., 1999, Killer whale – Orcinus orca (Linnaeus, 1758) In: Ridgway S.H., Harrison S.R. (Eds.), Handbook of Marine Mammals Vol. 6: The second book of dolphins and porpoises. Academic Press, London, pp. 281–322.
Evans, P.G.H., 1988, Killer whales (Orcinus orca) in British and Irish waters. Rit Fiskid. 11, 42–54.
Evans P.G.H., 1992, Status review of cetaceans in British and Irish waters. Report to the UK Department of the Environment, Mammal Society Cetacean Group, Oxford.
Felleman F.L., Heimlich-Boran J.R., Osborne R.W., 1991, The feeding ecology of killer whales (Orcinus orca) in the Pacific Northwest. In: Pryor K., Norris K.S. (Eds.), Dolphin societies: discoveries and puzzles. University of California Press, Berkeley, pp. 113–147.
Fisher P.R., Adam M., Brown E.G., 1998, Killer whales (Orcinus orca) in Shetland waters. In: Fisher P.R. (Ed.), Shetland Sea Mammal Report. Shetland Sea Mammal Group, Lerwick, pp. 12–16.
Ford, J.K.B., 1989, Acoustic behaviour of resident killer whales (Orcinus orca) off Vancouver Island, British Columbia. Can. J. Zool. 67, 727–745. CrossRef
Heimlich-Boran, J.R., 1988, Behavioural ecology of killer whales (Orcinus orca) in the Pacific Northwest. Can. J. Zool. 66, 565–578. CrossRef
Heyning J.E., Dahlheim M.E., 1988, Orcinus orca. Mammalian Species, 304. The American Society of Mammalogists, 9 pp.
Hückstädt, L.A., Antezana, T., 2003, Behaviour of the southern sea lion (Otaria flavescens) and consumption of the catch during purse-seining for jack mackerel (Trachurus symmetricus) off central Chile. ICES J. Mar. Sci. 60, 1003–1011. CrossRef
Jacobsen J., 1986, The behaviour of Orcinus Orca in Johnstone Strait, British Columbia. In: Kirkevold B.C., Lockard J.S. (Eds.), Behavioural biology of killer whales. A.R. Liss, New York, pp. 135–185.
Jefferson T.A., Leatherwood S., Webber M.A., 1993, FAO Species identification guide. Marine mammals of the world. UNEP / FAO, Rome.
Jefferson, T.A., Stacey, P.J., Baird, R.W., 1991, A review of killer whale interactions with other marine mammals: predation to co-existence. Mamm. Rev. 21, 151–180. CrossRef
Keltz S., Robb S., 2006, Fish and Nephrops Stock Information: 2006. Fisheries Research Services Marine Laboratory Report. Available at www.marlab.ac.uk.
Kock, K.H., Purves, M.G., Duhamel, G., 2006, Interactions between cetacean and fisheries in the Southern Ocean. Polar Biol. 29, 379–388. CrossRef
Leatherwood S., Reeves R., 1983, The Sierra Club Handbook of Whales and Dolphins, San Francisco.
López, J.C., López, D., 1985, Killer whale (Orcinus orca) of Patagonia and their behaviour of intentional stranding while hunting near shore. J. Mamm. 66, 183–185. CrossRef
López, A., Pierce, G.J., Santos, M.B., Gracia, J., Guerra, A., 2003, Fishery by-catches of marine mammals in Galician waters: Results from on-board observations and an interview survey of fishermen. Biol. Conserv. 111, 25–40. CrossRef
Morizur, Y., Berrow, S.D., Tregenza, N.J.C., Couperus, A.S., Pouvreau, S., 1999, Incidental catches of marine-mammals in pelagic trawl fisheries of the northeast Atlantic. Fish. Res. 41, 297–307. CrossRef
Muus B.J., Nielsen J.G., 1999, Sea fish. Scandinavian Fishing Year Book, Hedehusene, Denmark.
Pierce, G.J., Dyson, J., Kelly, E., Eggleton, J.D., Whomersley, P., Young, I.A.G., Santos, M.B., Wang, J., Spencer, N.J., 2002, Results of a short study on by-catches and discards in pelagic fisheries in Scotland (UK). Aquat. Living Resour. 15, 327–334. CrossRef
Pollock C.M., Mavor R., Weir C.R., Reid A., White R.W., Tasker M.L., Webb A., Reid J.B., 2000, The distribution of seabirds and marine mammals in the Atlantic Frontier. Joint Nature Conservation Committee, Peterborough.
Purves, M.G., Agnew, D.J., Balguerias, E., Moreno, C.A., Watkins, B., 2004, Killer whale (Orcinus orca) and sperm whale (Physeter macrocephalus) interactions with longline vessels in the Patagonian toothfish fishery at South Georgia, South Atlantic. CCAMLR Science 11, 111–126.
Reid J.B., Evans P.G.H., Northridge S.P., 2003, Atlas of cetacean distribution in North-west European waters. Joint Nature Conservation Committee, Peterborough.
Reyes J.C., 1991, The conservation of small cetaceans: a review. Report prepared for the Secretariat of the Convention on the Conservation of Migratory Species of Wild Animals. UNEP / CMS Secretariat, Bonn.
Saulitis, E., Matkin, C., Barret-Lennard, L. Heise, K., Ellis, G., 2000, Foraging strategies of sympatric killer whale (Orcinus orca) populations in Prince William Sound, Alaska. Mar. Mamm. Sci. 16, 94–109. CrossRef
Similä T., 1997, Behavioural ecology of killer whales in northern Norway. PhD Thesis. Norwegian College of Fisheries Science, University of Tromsø, Norway.
Similä T., Turunen S., Ericsson Y., 2005, Interactions between killer whales and herring in Norway. 19th Annual Conference of European Cetacean Society, La Rochelle, April 2–7, 2005.
Similä, T., Ugarte, F., 1993, Surface and underwater observations of cooperatively feeding killer whales in northern Norway. Can. J. Zool. 71, 1494–1499. CrossRef