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The Pennatulid Kophobelemnon stelliferum (Cnidaria: Octocorallia) in the Porcupine Seabight (north-east Atlantic Ocean)

  • A.L. Rice (a1), P.A. Tyler (a2) and G.J.L. Paterson (a3)
Abstract

The upper bathyal sea-pen Kophobelemnon stelliferum extends to depths of about 1600 m in the Porcupine Seabight, to the south-west of Ireland, but is rare below about 1150 m. Photographic data suggest that the species attains numerical abundances of more than 2 m−2and a wet weight biomass of at least 4 g m−2. The highest densities, however, do not necessarily correspond to the highest biomass values since there is a clear depth-related change in population structure. The largest sea-pens are restricted to the deeper parts of the bathymetric range of the species. There is also a marked change in the growth form at a total colony length of about 250 mm, with larger colonies having relatively more polyps than smaller ones. The sexes are separate in Kophobelemnon stelliferum and the sex ratio of colonies is about 1:1. The maximum oocyte diameter is about 800 μm, but there is no evidence of seasonal reproduction by this pennatulid in the Porcupine Seabight.

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F.S. Chia & B.J. Crawford , 1973. Some observations on gametogenesis, larval development and substratum selection of the sea-pen Ptilosarcus guerneyi. Marine Biology, 23, 7382.

J. Kastendiek , 1982. Factors determining the distribution of the sea pansy, Renilla kollikeri, in a subtidal sand-bottom habitat. Oecologia, 52, 340347.

R.S. Lampitt , D.S.M. Billett & A.L. Rice , 1986. Biomass of the invertebrate megabenthos from 500 to 4100 m in the northeast Atlantic Ocean. Marine Biology, 93, 6981.

R.W. Langton , E.W. Langton , R.B. Theroux & J.R. Uzmann , 1990. Distribution, behavior and abundance of sea-pens, Pennatula aculeata, in the Gulf of Maine. Marine Biology, 107, 463469.

J.T. Pennington , 1985. The ecology of fertilization of echinoid eggs: the consequences of sperm dilution, adult aggregation, and synchronous spawning. Biological Bulletin. Marine Biological Laboratory, Woods Hole, 169, 417430.

A.L. Rice , M.H. Thurston & A.L. New , 1990. Dense aggregations of a hexactinellid sponge, Pheronema carpenteri, in the Porcupine Seabight (northeast Atlantic Ocean), and possible causes. Progress in Oceanography, 24, 179196.

P. A. Tyler , A. Grant , S.L. Pain & J.D. Gage , 1982. Is annual reproduction in deep-sea echinoderms a response to variability in their environment? Nature, London, 300, 747750.

M. Van-Praët , A.L. Rice & M.H. Thurston , 1990. Reproduction in two deep-sea anemones (Actiniaria); Phelliactis hertwigi and P. robusta. Progress in Oceanography, 24, 207222.

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Journal of the Marine Biological Association of the United Kingdom
  • ISSN: 0025-3154
  • EISSN: 1469-7769
  • URL: /core/journals/journal-of-the-marine-biological-association-of-the-united-kingdom
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