Hydrobiologia

, Volume 625, Issue 1, pp 83–90 | Cite as

Can artificial substrates enriched with crustose coralline algae enhance larval settlement and recruitment in the fluted giant clam (Tridacna squamosa)?

  • Mei Lin Neo
  • Peter A. Todd
  • Serena Lay-Ming Teo
  • Loke Ming Chou
Primary research paper

Abstract

Habitat recognition and selection can greatly increase the early-life survival of sessile reef organisms. This study describes the settlement and recruitment responses of the fluted giant clam, Tridacna squamosa, to concrete tablets and tiles containing different concentrations of crustose coralline algae covered coral rubble (CCACR). Crustose coralline algae is known to induce settlement in a variety benthic animals, but it has not been used previously as an aggregate in concrete—potentially a way of encouraging colonization of man-made structures erected on or near coral reefs. After being given the choice of small tablets made with 0%, 30% or 60% CCACR for 4 days, 11 days old larvae preferred the substrate containing the most CCACR. Recruitment responses of juvenile clams to larger tiles made with the same three CCACR concentrations were also tested. These tiles were further divided into rough and smooth surface textures. After 6 weeks, more juvenile clams had recruited to the rough surfaced tiles than the smooth ones, but no significant differences among the CCACR treatments were found. Thus, even though concrete made with CCACR is initially attractive to larvae, it has no effect on recruitment of juvenile T. squamosa.

Keywords

Artificial substrates CCA Giant clam larvae Recruitment Settlement Tridacna squamosa Coral rubble Singapore 

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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Mei Lin Neo
    • 1
  • Peter A. Todd
    • 1
  • Serena Lay-Ming Teo
    • 2
  • Loke Ming Chou
    • 1
  1. 1.Marine Biology Laboratory, Department of Biological SciencesNational University of SingaporeSingaporeSingapore
  2. 2.Tropical Marine Science InstituteNational University of SingaporeSingaporeSingapore

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