Journal of the Marine Biological Association of the UK



Research Article

Growth and breeding of a primitive stalked barnacle Leucolepas longa (Cirripedia: Scalpellomorpha: Eolepadidae: Neolepadinae) inhabiting a volcanic seamount off Papua New Guinea


V.  Tunnicliffe a1 and A.J.  Southward a1a2c1
a1 Department of Biology, University of Victoria, Victoria, BC, Canada, V8W 3N5
a2 Marine Biological Association, Citadel Hill, Plymouth, PL1 2PB, UK

Article author query
tunnicliffe v   [PubMed][Google Scholar] 
southward aj   [PubMed][Google Scholar] 

Abstract

A pedunculate barnacle, Leucolepas longa, occurs in densities over 1000 individuals m−2 on the summit of a small seamount near New Ireland, Papua New Guinea. Most of the population grows on vesicomyid clams projecting from sulphide-rich sediments, or on their dead shells, but the barnacle also settles on rock and on tubes of a vestimentiferan. Collections of several hundred barnacles allowed comparison of population and reproductive characteristics. The barnacle is a suspension feeder with a lightly-armoured stalk that can grow to 40 cm above the bottom. Growth appears to be rapid and both reproduction and recruitment are continuous. The barnacles brood egg masses within the capitular chamber and 46% of one sample was brooding. Lecithotrophic nauplii released upon retrieval to the surface were cultivated for 45 days. Metamorphosis to Stage IV yielded an actively swimming larva about 1 mm long overall, which still contained lipid reserves, indicating capacity for wide dispersal.

(Received March 17 2003)
(Accepted November 24 2003)


Correspondence:
c1 e-mail: ajs@mba.ac.uk