Benthic hydroids off Scott Island and the shelf and slope of the Ross Sea (Antarctica) collected during the IPY-CAML TAN0802 voyage by R/V Tangaroa
- 55 Downloads
During the IPY-CAML TAN0802 survey with RV Tangaroa, marine communities on the shelf and slope of the Ross Sea, as well as around the remote Scott Island and seamounts east of the Balleny Islands, were sampled using various sampling gears (epibenthic sled, rough-bottom fish trawl, beam trawl and multicorer). Amongst the numerous benthic samples obtained, an important collection of hydroids was present. Thirty-five species, including Sertularella pseudovervoorti sp. nov., have been recorded. Anthoathecata are represented only by Bouillonia denhartogi. The collection is essentially dominated by Leptothecata, with 34 species, belonging to the families Lafoeidae, Haleciidae, Kirchenpaueriidae, Schizotrichidae, Sertularellidae, Staurothecidae, Symplectoscyphidae, Tiarannidae and Zygophylacidae. Symplectoscyphidae is by far the most diversified family with 12 species (34%), followed by Kirchenpaueriidae and Staurothecidae with 5 each (14%) and Haleciidae with 4 species (11%). At the generic level, Symplectoscyphus with seven species, Antarctoscyphus, Oswaldella and Staurotheca with five species and Halecium with four are the most speciose genera. Symplectoscyphus frondosus is clearly the species with the highest occurrence. The depth range of 15 species is increased, considerably in most cases. Several species so far considered to be inhabitants of the Antarctic shelf clearly extend their distribution to the slope. Twenty species were found on the shelf and slope of the Ross Sea, with Stegopoma plicatile representing the new single record for the area, raising the number of known species to 78. Ten species (including the new species) come from the virtually unknown area of Scott Island, 8 constituting new records, raising the number of species known in this isolated area to 11. Sixty-eight percent of the species are Antarctic endemic and 94% are restricted to Antarctic or Antarctic/sub-Antarctic waters.
KeywordsHydrozoa Biodiversity New species Deep-sea Bathymetry Biogeography
I thank Dr. Ashley Rowden, National Institute of Water & Atmospheric Research (NIWA), for giving me the opportunity to study the material. I also thank Sadie Mills and Dr. Kareen Schnabel, from the same institution, for their help with different aspects related to the collection. This research was funded by the New Zealand Government under the New Zealand International Polar Year Census of Antarctic Marine Life Project (Phase 1: So001IPY; Phase 2; IPY2007-01). I gratefully acknowledge project governance provided by the Ministry of Fisheries Science Team and the Ocean Survey 20/20 CAML Advisory Group (Land Information New Zealand, Ministry of Fisheries, Antarctica New Zealand, Ministry of Foreign Affairs and Trade, and National Institute of Water and Atmospheric Research).
Compliance with ethical standards
Conflict of interest
The author declares that he has no conflict of interest.
All applicable international, national, and/or institutional guidelines for the care and use of animals were followed by the author.
Sampling and field studies
All necessary permits for sampling and observational field studies have been obtained by the author from the competent authorities and are mentioned in the acknowledgements, if applicable.
- Billard A (1906) Hydroïdes. In: Joubin L (ed) Expédition Antarctique Française (1903–1905) commandée par le Dr Jean Charcot, Masson et Cie, Paris, pp 1–20Google Scholar
- Blanco OM (1984) Contribución al conocimiento de hidrozoos antárticos y subantárticos. Contrib Inst Antárt Argent 294:1–53 pls 1–47 Google Scholar
- El Beshbeeshy M (2011) Thekate Hydroiden von Patagonischen Schelf (Cnidaria, Hydrozoa, Thecata). Edited by Jarms G. Verh Naturwiss Ver Hamburg 46:19–233Google Scholar
- Jäderholm E (1904) Mitteilungen ueber einige von der Schwedischen Antarctic-Expedition 1901–1903 eingesammelte Hydroiden. Arch Zool exp gén 4 Notes et revue 1:1–14Google Scholar
- Millard NAH (1964) The Hydrozoa of the south and west coasts of South Africa. Part II. The Lafoeidae, Syntheciidae and Sertulariidae. Ann S Afr Mus 48:1–56Google Scholar
- Millard NAH (1975) Monograph on the Hydroida of southern Africa. Ann S Afr Mus 68:1–513Google Scholar
- Naumov DV, Stepanjants SD (1962) Hydroida (Thecaphora) collected by the Soviet Antarctic Expedition on the M/V Ob in antarctic and subantarctic waters. In: Biol Res Soviet Antarct Exped 1955–1958 1 (in Russian). Issled Fauny Morei 1:68–106Google Scholar
- Naumov DV, Stepanjants SD (1972) Marine invertebrates from Adélie land collected by the XIIth and XVth French Antarctic expeditions. 3. Hydroida. Téthys Suppl 4:25–60Google Scholar
- Peña Cantero AL, García Carrascosa AM (1995) Hidrozoos bentónicos de la campaña Antártida 8611. Publ Espec Inst Esp Oceanogr 19:1–148Google Scholar
- Peña Cantero AL, Svoboda A, Vervoort W (1996) Species of Schizotricha Allman, 1883 (Cnidaria, Hydrozoa) from recent antarctic expeditions with R.V. “Polarstern”, with the description of a new species. Zool Meded 70:411–435Google Scholar
- Peña Cantero AL, Svoboda A, Vervoort W (1999) Species of Antarctoscyphus Peña Cantero, García Carrascosa and Vervoort, 1997 (Cnidaria, Hydrozoa, Sertulariidae) from recent Antarctic expeditions with R.V. Polarstern, with the description of two new species. J Nat Hist 33:1739–1765CrossRefGoogle Scholar
- Schuchert P (2001) Hydroids of Greenland and Iceland (Cnidaria, Hydrozoa). Meddelelser om Grønland, bioscience 53. The Danish Polar Center, CopenhagenGoogle Scholar
- Stepanjants SD (1972) Hydroidea of the coastal waters of the Davis Sea (collected by the XIth Soviet Antarctic Expedition of 1965–1966 In: Biol res Soviet Antarct Exped 5 (in Russian). Issled Fauny Morei 11:56–79Google Scholar
- Stepanjants SD (1979) Hydroids of the antarctic and subantarctic waters. In: Biol res Soviet Antarct Exped 6 (in Russian). Issled Fauny Morei 20:1–200, pls 1–25Google Scholar
- Svoboda A, Stepanjants SD, Ljubenkov J (2006) The genus Bouillonia (Cnidaria: Hydrozoa: Anthoathecata). Three species from the northern and southern hemispheres, with a discussion of bipolar distribution of this genus. Zool Meded 80–4:185–206Google Scholar
- Totton AK (1930) Coelenterata. Part V Hydroida Nat Hist Rep Br Antarct Terra Nova Exped 1910 5:131–252 pls 1–3 Google Scholar
- Vanhöffen E (1910) Die Hydroiden der Deutschen Südpolar-Expedition 1901–1903. Dtsch Südpolar Exped 1901–1903(11):269–340Google Scholar
- Vervoort W (1972a) Hydroids from submarine cliffs near Arthur Harbour, Palmer Archipelago, Antarctica. Zool Meded 47:337–357Google Scholar
- Vervoort W (1972b) Hydroids from the Theta, Vema and Yelcho cruises of the Lamont-Doherty geological observatory. Zool Verh 120:1–247Google Scholar