Hydrobiologia

, Volume 471, Issue 1–3, pp 83–90 | Cite as

Megafauna associations with deepwater corals (Primnoa spp.) in the Gulf of Alaska

  • Kenneth J. Krieger
  • Bruce L. Wing
Article

Abstract

Few in situ observations have been made of deepwater corals and, therefore, little is known about their biology or ecological significance. Deepwater corals (Primnoa spp.) were observed from a manned submersible at 11 sites in the Gulf of Alaska from 1989 to 1997 at depths of 161–365 m. We identified 10 megafaunal groups that associate with Primnoa to feed on the coral, use the coral branches for suspension feeding, or for protection. Predators on Primnoa polyps included sea stars, nudibranchs, and snails. Sea stars were the main predators, consuming 45% and 34% of the polyps at two sites. Suspension-feeders included crinoids, basket stars, anemones, and sponges. Most suspension-feeders observed at depths <300 m were associated with Primnoa. Protection seekers included rockfish, crab, and shrimp. Six rockfish species were either beneath, among, or above Primnoa. Shrimp were among the polyps, and a pair of mating king crabs were beneath Primnoa. These observations indicate Primnoa are important components of the deepwater ecosystem and removal of these slow-growing corals could cause long-term changes in associated megafauna.

corals Alaska submarine 

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References

  1. Brusca, R. C. & G. J. Brusca, 1990. Invertebrates. Sinauer Associates, Inc., Sunderland, MA.Google Scholar
  2. Breeze, H., D. S. Davis, M. Butler & V. Kostylev, 1997. Distribution and status of deep sea corals off Nova Scotia. Ecology Action Centre, Marine Issues Committee Spec. Publ. 1.Google Scholar
  3. Chesher, R. H., 1969. Destruction of Pacific corals by the sea star Acanthaster planci. Science 165: 280–283.Google Scholar
  4. Chess, J. R., E. S. Hobson & D. F. Howard, 1997. Interactions between Acanthaster planci (Echinodermata, Asteroidea) and scleractinian corals at Kona, Hawai'I. Pac. Sci. 51(2): 121–133.Google Scholar
  5. Cimberg, R. L., T. Gerrodette & K. Muzik, 1981. Habitat requirements and expected distribution of Alaska coral. Final Report, Research Unit 601, VTN Oregon, Inc. U.S. Department of Commerce, NOAA, OCSEAP Final Report 54(1987), 207–308. Of-fice of Marine Pollution Assessment, 701 C Street, Anchorage, Alaska 95513.Google Scholar
  6. Heikoop, J. M., M. J. Risk, A. V. Lazier & H. P. Schwarcz, 1998. δ 18O and δ13C signatures of a deep-sea gorgonian coral from the Atlantic coast of Canada. American Geophysical Union, Spring meeting. Boston Abstract.Google Scholar
  7. Jensen, A. & R. Frederiksen, 1992. The fauna associated with the bank-forming deepwater coral Lophelia pertusa (Scleractinaria) on the Faroe shelf. Sarsia 77: 53–69.Google Scholar
  8. Jones, O. A. & R. Endean (eds), 1973, 1974, 1976. Biology and Geology of Coral Reefs. Vols. I, II, and III. Academic Press, New York.Google Scholar
  9. Kozloff, E. N., 1987. Marine Invertebrates of the Pacific Northwest. Univ. Washington Press, Seattle.Google Scholar
  10. Krieger, K. J., 1993. Distribution and abundance of rockfish determined from a submersible and by bottom trawling. Fish. Bull. 91: 87–96.Google Scholar
  11. Krieger, K. J. & D. H. Ito, 1999. Distribution and abundance of shortraker rockfish, Sebastes borealis, and rougheye rockfish, S. aleutianus, determined from a manned submersible. Fish. Bull. 97: 264–272.Google Scholar
  12. Mortensen, P. B., M. Hovland, T. Brattegard & R. A. Frestveit, 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
  13. O'Connell, V., W. Wakefield & H. G. Greene, 1998. The use of a no-take marine reserve in the Eastern Gulf of Alaska to protect essential fish habitat. In Yoklavich, M. (ed.), Marine Harvest Refugia for West Coast Rockfish: A Workshop. U.S. Dep. Commer., NOAA Tech. Memo. NOAA-TM-NMFS-SWFSC-225: 125–132.Google Scholar
  14. Stone, R. P., C. E. O'Clair & T. C. Shirley, 1993. Aggregating behavior of ovigerous female red king crab, Paralithodes camtschaticus, in Auke Bay, Alaska. Can. J. Fish. Aquat. Sci. 50: 750–758.Google Scholar
  15. Strömgren, T., 1970. Emergence of Paramuricea placomus (L.) and Primnoa resedaeformis (Gunn.) in the inner part of Trondheimsjorden (west coast of Norway). Det Kongelige Norske Videnskabers Selskab Skrifter 4: 1–6.Google Scholar
  16. Theodor, J., 1967. Contribution à l'étude des gorgones (VI): La dénudation des branches de gorgones par des mollusques prédateurs. Vie et Millieu, Ser. A 18: 73–78.Google Scholar
  17. Yang, M.-S., 1993. Food habits of the commercially important groundfishes in the Gulf of Alaska in 1990. U.S. Dep. Commer., NOAA Tech. Memo. NMFS-AFSC-22.Google Scholar
  18. Yang, M.-S., 1996. Diets of the important groundfishes in the Aleutian Islands in summer 1991. U.S. Dep. Commer., NOAA Tech. Memo. NMFS-AFSC-60.Google Scholar

Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • Kenneth J. Krieger
    • 1
  • Bruce L. Wing
    • 1
  1. 1.Auke Bay Laboratory, Alaska Fisheries Science CenterNational Marine Fisheries Service, NOAAJuneauU.S.A

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