Marine Biology

, Volume 123, Issue 4, pp 757–762 | Cite as

A pelagic bryozoan from Antarctica

  • L. S. Peck
  • P. J. Hayward
  • M. E. Spencer-Jones


Spherical or sub-spherical bryozoan colonies were collected from the surface waters of a coastal polynya in the southeastern Weddell Sea near Halley Station in February 1992. These are the first truly pelagic marine bryozoan colones yet recorded. The collection site is the edge of the Brunt ice shelf, which is between 150 and 250 m thick in this area, and the depth of water to the seabed is ∼-400 m. The colonies were hollow, composed of a single layer of autozooids, and appeared complete and undamaged. They were between 5.0 and 23.0 mm in diameter, were brownish in colour in life, and pale yellowish brown after preservation. Light and scanning electron microscope investigations of the colonies indicated that they belonged to the genus Alcyonidium, and they are here compared with A. flabelliforme Kirkpatrick, a known antarctic benthic species. Both a pelagic existence and hollow spherical colony form are new attributes for the phylum Bryozoa. However, because of the plasticity of form of species belonging to the genus Alcyonidium, these is not enough evidence for the introduction of a new species at this time. The colonies found may represent a previously undescribed juvenile stage of a known Alcyonidium species. It is postulated that these colonies may obtain nutrition from the often abundant populations of ice algae present in the lower layers of permanent sea-ice.


Colony Form Collection Site Juvenile Stage Pale Yellowish Abundant Population 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. Ackley SF (1986) Sea-ice pressure ridge microbial communities. Antarctic J US 21: 172–174Google Scholar
  2. Anderson PS (1993) Evidence for an Antarctic winter coastal polynya. Antarctic Sci 5: 221–226Google Scholar
  3. Androsova HI (1968) Bryozoans of the orders Cyclostomata and Ctenostomata of the Antarctic and Subantarctic. Issled Fauny Moreî. 6(14): 35–84Google Scholar
  4. Arntz W, Brey T, Gallardo (1994) Antarctic zoobenthos. Oceanogr mar Biol A Rev 32: 241–303Google Scholar
  5. Bathmann U, Schulz-Baldes M, Fahrbach E, Smetacek V, Hubberten H-W (1992) The expeditions ANTARKTIS IX 1–4 of the research vessel “Polarstern” in 1990/91. Ber Polarforsch 100: 1–403Google Scholar
  6. Behmann T, Fahrbach E, Dehn J, Knoche M, Markus T, Plugge R, Strass V, Buxhoeveden C, Harder M, Hinrichsen H-H, Schäfer H, Sterr U Wisotzki A, Schutt E, Brosin H-J, Schmidt M (1992) Water masses and circulation. Ber Polarforsch 100: 39–53Google Scholar
  7. Cadman PS, Ryland JS (1995) The characters, reproduction and growth of Alcyonidium mytili Dalyell, 1848 (Bryozoa: Ctenostomatida). In: Gordon DP, Smith AA, Grant-Mackie, (eds) Bryozoans JA in space and time. National Institute of Water and Atmospheric Research, Wellington, NZ (in press)Google Scholar
  8. Carmack EC, Foster TD (1975) Circulation and distribution of oceanographic properties near the Filchner ice shelf. Deep-Sea Res 22: 77–90Google Scholar
  9. Dayton PK (1989) Interdecadal variation in Antarctic sponge and its predators from oceanographic climate shifts. Science, NY 245: 1484–1486Google Scholar
  10. Fahrbach E, Rohardt G, Krause G (1992) The Antarctic coastal current in the southeastern Weddell Sea. Polar Biol 12: 171–182Google Scholar
  11. Foldvik A, Gammelsrød T, Tørresen T (1985) Physical studies in the Weddell Sea during the Norwegian Antarctic Research Expedition 1978/79. Polar Res 3: 195–207Google Scholar
  12. Galéron J, Herman RL, Arnaud PM, Arntz WE, Hain S, Klages M (1992) Macrofaunal communities on the continental shelf and slope of the southeastern Weddell Sea, Antarctica. Polar Biol 12: 283–290Google Scholar
  13. Gammelsrød T, Slosvik N (1981) Hydrographic and current measurements in the southern Weddell Sea 1979/80. Polarforschung 51: 101–111Google Scholar
  14. Gerdes D, Klages M, Arntz WE, Herman RL, Galéron J, Hain S (1992) Quantitative investigations on macrobenthos communities of the southeastern Weddell Sea shelf based on multibox corer samples. Polar Biol 12: 291–301Google Scholar
  15. Gieskes WWC, Veth C, Woerhemann A, Graefe M (1987) Secchi disc visibility world record shattered. EOS Trans, Am geophys Un 68: p. 123Google Scholar
  16. Gordon AL, Comiso JC (1988) Polynyas in the Southern Ocean. Scient Am 258: 70–77Google Scholar
  17. Gordon AL, Martinson DG, Taylor HW (1981) The wind driven circulation in the Weddell-Enderby Basin. Deep-Sea Res 28: 151–163Google Scholar
  18. Hayward PJ (1985) Ctenostome bryozoans. Synopses Br Fauna (New Ser) 53: 1–169Google Scholar
  19. Kirkpatrick R (1902) Report on the collections of natural history made in the Antarctic regions during the voyage of the “Southern Cross”. XVI. Polyzoa. Trustees of the British Museum (Natural History), LondonGoogle Scholar
  20. Kottmeier ST, Sullivan CW (1987) Late winter primary production and bacterial production in sea ice and seawater west of the Antarctic peninsula. Mar Ecol Prog Ser 36: 287–298Google Scholar
  21. Lidgard S (1985) Zooid and colony growth in encrusting bryozoans. Palaeontology 28: 255–291Google Scholar
  22. Palmisano AC, Sullivan CW (1983) Sea ice microbial communities (SIMCO). 1. Distribution, abundance and primary production of ice microalgae in McMurdo Sound, Antarctica in 1980. Polar Biol 2: 171–177Google Scholar
  23. Smith REH, Anning J, Clement P, Cota G (1988) The abundance and production of ice alga in Resolute passage, Canadian Arctic. Mar Ecol Prog Ser 48: 251–263Google Scholar
  24. Smith SD, Muench RD, Pease CH (1990) Polynyas and leads: an overview of physical processes and environment. J geophys Res 95: 9461–9479Google Scholar
  25. Subba Rao DV, Platt T (1984) Primary production of Arctic waters. Polar Biol 3: 191–201Google Scholar
  26. Thorpe JP, Beardmore JA, Ryland JS (1978) Genetic evidence for cryptic speciation in the marine bryozoan Alcyonidium gelatinosum. Mar Biol 49: 27–32Google Scholar
  27. Winston JE, Hayward PJ (1994) Bryozoa of the U.S. Antarctic Research Program: preliminary report. In: Hayward PJ, Ryland JS, Taylor PD (eds) Biology and palaeobiology of bryozoans. Olsen & Olsen, Fredensborg, pp 201–210Google Scholar

Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • L. S. Peck
    • 1
  • P. J. Hayward
    • 2
  • M. E. Spencer-Jones
    • 3
  1. 1.British Antarctic SurveyCambridgeEngland, UK
  2. 2.School of Biological SciencesUniversity of WalesSwanseaSouth Wales, UK
  3. 3.Department of ZoologyThe Natural History MuserumLondonEngland, UK

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