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Massive recruitment of the barnacle Semibalanus balanoides in the Clyde Sea (Scotland, UK) in the spring of 2000

Published online by Cambridge University Press:  19 September 2003

Lars J. Hansson ,
Ian R. Hudson ,
Russell J. Seddon ,
Oliver Shaw  and
Jeremy C. Thomason
Lars J. Hansson
Affiliation:
School of Biology, University of Newcastle upon Tyne, Newcastle upon Tyne, NE1 7RU, UK
Ian R. Hudson
Affiliation:
School of Biology, University of Newcastle upon Tyne, Newcastle upon Tyne, NE1 7RU, UK
Russell J. Seddon
Affiliation:
School of Biology, University of Newcastle upon Tyne, Newcastle upon Tyne, NE1 7RU, UK
Oliver Shaw
Affiliation:
School of Biology, University of Newcastle upon Tyne, Newcastle upon Tyne, NE1 7RU, UK
Jeremy C. Thomason
Affiliation:
School of Biology, University of Newcastle upon Tyne, Newcastle upon Tyne, NE1 7RU, UK
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Abstract

In April 2000 a massive recruitment of the barnacle Semibalanus balanoides was observed in the Clyde Sea. At one location 700 cyprids 1−1 of this species were recorded. This is ∼3500 times more abundant than previously recorded, and resulted in metamorphosis of some cyprids whilst still in the plankton, as well as massive settlement, with recruits found on adults and in the splash zone. The maximum density recorded was 109 settlers cm−2. Over the next 60 d mortality averaged 85%, resulting in a mean density of 8.4 recruits cm−2 in June 2000. Recruitment varied spatially at the km and m scale (site, shore height) but there was no evidence that it was affected by the presence of adult conspecifics.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 83 , Issue 5 , October 2003 , pp. 923 - 924
Copyright
Copyright © Marine Biological Association of the United Kingdom 2003

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