Hydrobiologia

, Volume 471, Issue 1–3, pp 1–12 | Cite as

The deep-water coral Lophelia pertusa in Norwegian waters: distribution and fishery impacts

  • J.H. Fosså
  • P.B. Mortensen
  • D.M. Furevik

Abstract

The paper presents documentation on the distribution of, and damages to, deep-water reefs of the coral Lophelia pertusa in Norwegian waters. The reef areas have traditionally been rich fishing grounds for long-line and gillnet fisheries, and the coral habitat is known to support a high diversity of benthic species. Anecdotal reports claim that trawlers often use the gear, wires, chains and trawl doors to crush the corals and clear the area before fishing starts. To get an overview of the situation, information about the distribution and damage were collected from the literature, fishermen, and our own investigations. The results show that the corals are abundant particularly on the mid Norwegian continental shelf between 200 and 400 m depth. In general it seems that the largest densities are distributed along the continental break and at ridges of morainic origin. The reports from fishermen suggested severe damage to the corals and in situ observations using ROV confirmed the presence of mechanically damaged corals located on trawling grounds. A first estimate of the fishery impact indicates that between 30 and 50% of the reef areas are damaged or impacted. Fishermen claim that catches are significantly lowered in areas where the reefs are damaged. Potential ecological consequences of the destruction are discussed.

Deep-water coral Lophelia pertusa distribution in Norway fishery impact 

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References

  1. Anon, 1991–1999. Retrieval of lost gillnets. Ann. Rep. norw. Dir. Fish. (in Norwegian).Google Scholar
  2. Bell, N. & J. Smith, 1999. Coral growing on North Sea oil rigs. Nature 402: 601.Google Scholar
  3. Breeze, H., D. S. Davis, M. Butler & V. Kostylev, 1997. Distribution and status of deep-sea corals off Nova Scotia. Mar. Iss. Comm. Spec. Publ. No 1. Ecology Action Centre. Halifax, Canada.Google Scholar
  4. Cairns, S. D., 1994. Scleractinia of the Temperate North Pacific. Smiths. Contrib. Zool. 557. 150 pp.Google Scholar
  5. Cortes, J. & M. R. Risk, 1985. A reef under siltation stress: Cahuita, Costa Rica. Bull mar. Sci. 36: 339–356.Google Scholar
  6. Dons, C., 1944. Norges korallrev. K. Nor. Vidensk. Selsk. Forh. 16: 37–82.Google Scholar
  7. Fadlallah, Y. H., 1983. Sexual reproduction, development and larval biology in scleractinian corals. Coral Reefs 2: 129–150.Google Scholar
  8. Fernandez Pulpeiro, E., C. Besteiro & F. Ramil, 1988. Sublittoral bryozoans of the Norwegian Sea. Thalassas 6: 23–27.Google Scholar
  9. Fosså, J. H. & P. B. Mortensen, 1998. Artsmangfoldet på Lopheliakorallrev og metoder for kartlegging og overv #x00E5;kning (Diversity of species associated with Lophelia coral reefs and methods for mapping and monitoring) (in Norwegian with abstract and legends to tables and figures in English). Fisken og Havet No 17. 95 pp.Google Scholar
  10. Foss #x00E5;, J. H., P. B. Mortensen & D. M. Furevik, 2000. Lopheliakorallrev langs norskekysten. Forekomst og tilstand (Lophelia coral reefs in Norway. Distribution and effects of fishing) (in Norwegian with abstract and legends to tables and figures in English). Fisken og Havet No 2. 94 pp.Google Scholar
  11. Frederiksen, R., A. Jensen & H. Westerberg, 1992. The distribution of the scleractinian coral Lophelia pertusa around the Faroe islands and the relation to internal mixing. Sarsia 77: 157–171.Google Scholar
  12. Freiwald, A., 1998. Geobiology of Lophelia pertusa (Scleractinia) reefs in the north Atlantic. Habilitation thesis, Univ. Bremen, 116 pp.Google Scholar
  13. Furevik, D. M., L. Nøttestad, J. H. Fosså, Å. Husebø & S. B. Jørgensen, 1999. Fiskefordeling i og utenfor korallområder på Storegga (Fish distribution on and off coral reefs at Storegga) (in Norwegian with abstract and legends to tables and figures in English). Fisken og Havet No 15. 33 pp.Google Scholar
  14. Hall, S. J., 1999. The effects of fishing on marine ecosystems and communities. Fish Biol. Aqua. Res. Ser. 1. 274 pp.Google Scholar
  15. Hansen, B., & S. Østerhus, 2000. North Atlantic-Nordic Seas exchanges. Prog. Oceanog. 45: 109–208Google Scholar
  16. Hovland, M., & P. B. Mortensen, 1999. Norske korallrev og prosesser i havbunnen. John Grieg forlag, Bergen. 155 pp.Google Scholar
  17. Hovland, M., P. B. Mortensen, E. Thomsen & T. Brattegard, 1997. Substratum-related ahermatypic corals on the Norwegian continental shelf. Proc. 8th. Int. Coral Reef Symp. Vol. 2, Panama 1996, 1203–1206.Google Scholar
  18. Huston, M. A., 1994. Biological Diversity. The Coexisistence of Species on Changing Landscapes. Cambridge University Press, Cambridge, 681 pp.Google Scholar
  19. Jennings, S., & M. J. Kaiser, 1998. The effects of fishing on marine ecosystems. Adv. Mar. Biol. 34: 201–352.Google Scholar
  20. Lindeboom, H. J. & S. J. de Groot (eds), 1998. IMPACT-II. The effects of different types of fisheries on the North Sea and Irish Sea benthic ecosystems. Neth. Inst. Sea Res., rep. 1998–1.Google Scholar
  21. Mortensen, P. B., 2000. Lophelia pertusa (Scleractinia) in Norwegian waters. Distribution, growth, and associated fauna. Dr. scient. thesis, Univ. Bergen.Google Scholar
  22. Mortensen, P. B. & H. T. Rapp, 1998. Oxygen-and carbon isotope ratios related to growth line patterns in skeletons of Lophelia pertusa (L) (Anthozoa: Scleractinia): Implications for determination of linear extension rates. Sarsia 83: 433–446.Google Scholar
  23. Mortensen, P. B., M. Hovland, T. Brattegard & R. Farestveit, 1995. Deep water bioherms of the scleractinian coral Lophelia pertusa (L.) at 64° N on the Norwegian shelf: structure and associated megafauna. Sarsia 80: 145–158.Google Scholar
  24. Mortensen, P. B., M. Hovland, J. H. Fosså & D.M. Furevik, 2001. Distribution, abundance and size of Lophelia pertusa coral reefs in mid-Norway in relation to seabed characteristics. J. mar. biol. Ass. U.K. 81: 581–597.Google Scholar
  25. Norse, E. A., 1993. Global marine biological diversity. A strategy for building conservation into decision making. Island Press, Washington DC, 383 pp.Google Scholar
  26. Piskaln, C. H., J. H. Churchill & L. M. Mayer, 1998. Resuspension of sediment by bottom trawling in the Gulf of Maine and potential geochemical consequences. Cons. Biol. 12: 1223–1229.Google Scholar
  27. Rapp, H. T. & J. A. Sneli, 1999. Lophelia pertusa– myths and reality (abstract only). 2nd Nord. Mar. Sci. Meet., Hirtshals, Denmark, 2–4 March 1999.Google Scholar
  28. Reaka-Kudla, M.L., 1997. The global biodiversity of coral reefs: a comparison with rain forest. In Reaka-Kudla, M. L., D. E. Wilson & E. O. Wilson (eds). Biodiversity II. Understanding and Protecting Biological Resources: 83–108.Google Scholar
  29. Riegl, B., 1995. Effects of sand deposition on scleractinian and alcyonacean corals. Mar. Biol. 121: 517–526.Google Scholar
  30. Roberts, J. M. & R. Anderson, 2000. Laboratory studies of Lophelia pertusa — preliminary studies of polyp behaviour. Poster 9th Deep Sea Biology Symposium. Galway, Ireland, 25–30 June 2000.Google Scholar
  31. Rogers, A. D., 1999. The biology of Lophelia pertusa (Linnaeus 1758) and other deep-water reef-forming corals and impacts from human activities. Int. Rev. Hydrobiol. 84: 315–406.Google Scholar
  32. Squires, D. F., 1959. Deep sea corals collected by the Lamont Geological Observatory. 1. Atlantic corals. Am. Mus. Nov. 1965: 1–42.Google Scholar
  33. Stråmgren, T., 1971. Vertical and horizonthal distribution of Lophelia pertusa (Linne) in Trondheimsfjorden on the west coast of Norway. K. Nor. Vidensk. Selsk. Skr. 6: 1–9.Google Scholar
  34. Sætre, R., 1999. Features of the central Norwegian shelf circulation. Cont. Shelf Res. 19: 1809–1831.Google Scholar
  35. UK Biodiversity Group, 2000. Tranche 2 Action Plans. Volume V–Maritime Species and Habitats. Peterborough, English Nature.Google Scholar
  36. Watling, L. & E. A. Norse, 1998. Disturbance of the seabed by mobile fishing gear: A comparison to forest clearcutting. Cons. Biol. 12: 1180–1197.Google Scholar
  37. Wilson, J. B., 1979. ‘Patch’ development of the deep-water coral Lophelia pertusa (L.) on Rockall bank. J. mar. biol. Ass. U.K. 59: 165–177.Google Scholar
  38. Zibrowius, H., 1980. Les Scléractiniaires de la Méditerranée et de l'Atlantique nord-oriental. Mem. Inst. Oceanog. No 11, 226 pp.Google Scholar

Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • J.H. Fosså
    • 1
  • P.B. Mortensen
    • 1
  • D.M. Furevik
    • 1
  1. 1.Institute of Marine ResearchBergenNorway

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