, Volume 216, Issue 1, pp 297–303

Mutualism between the antipatharian Antipathes fiordensis and the ophiuroid Astrobrachion constrictum in New Zealand fjords

  • Ken R. Grange
Proceedings IV. Ecology Associations

DOI: 10.1007/BF00026478

Cite this article as:
Grange, K.R. Hydrobiologia (1991) 216: 297. doi:10.1007/BF00026478


A large and accessible population of the antipatharian Antipathes fiordensis occurs in the fjords of southern New Zealand. Many colonies support specimens of the perching asteroschematid ophiuroid, Astrobrachion constrictum, some of which have been observed in situ for over 5 y. Adult A. constrictum are restricted to A. fiordensis, and have never been found on any other organism. In situ experiments have shown that A. constrictum feeds at night, primarily on mucus produced by A. fiordensis polyps, but also on planktonic prey captured by the antipatharian's nematocysts. Feeding movements of the ophiuroid arms clear the antipatharian colony of suspended material that might smother the polyps. Observations following natural catastrophic events and transplant experiments have shown that survival of A. fiordensis is probably increased if A. constrictum is present.

Key words

Antipatharia black coral Ophiuroidea brittlestars mutualism symbiosis feeding fjords New Zealand 

Copyright information

© Kluwer Academic Publishers 1991

Authors and Affiliations

  • Ken R. Grange
    • 1
  1. 1.Division of Water Sciences, D.S.I.R.New Zealand Oceanographic InstituteWellingtonNew Zealand

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