Oecologia

, Volume 173, Issue 2, pp 431–438

Effects of delayed settlement on post-settlement growth and survival of scleractinian coral larvae

  • Erin M. Graham
  • Andrew H. Baird
  • Bette L. Willis
  • Sean R. Connolly
Population ecology - Original research

Abstract

Demographic connectivity requires both the dispersal of individuals between sub-populations, and their subsequent contribution to population dynamics. For planktonic, non-feeding marine larvae, the capacity to delay settlement enables greater dispersal distances, but the energetic cost of delayed settlement has been shown to adversely impact post-settlement fitness in several taxa. Here, we assess whether delayed settlement influences mortality rates or growth rates for the first 6 weeks following settlement of the scleractinian coral, Acropora tenuis. Coral larvae that were settled at 2, 4, and 6 weeks after spawning, and then deployed in the field, showed negligible effects of delayed settlement on post-settlement survival and time to initial budding for colony formation. Between-cohort differences in budding rate appeared to be explained by temporal variation in the post-settlement acquisition of zooxanthellae. The potential for coral larvae to remain in the pelagic zone for increased periods of time with little to no effect on post-settlement survival and growth suggests that the capacity for delayed settlement is likely to have meaningful demographic consequences for broadcast-spawning reef-building corals, and that the predicted trade-off between delayed settlement and post-settlement fitness is less applicable to reef-building scleractinian corals than other taxa with non-feeding larvae.

Keywords

Coral reefs Dispersal Connectivity Population dynamics Post-settlement processes 

Supplementary material

442_2013_2635_MOESM1_ESM.pdf (41 kb)
Supplementary material 1 (PDF 41 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Erin M. Graham
    • 1
  • Andrew H. Baird
    • 2
  • Bette L. Willis
    • 1
    • 2
  • Sean R. Connolly
    • 1
    • 2
  1. 1.School of Marine and Tropical BiologyJames Cook UniversityTownsvilleAustralia
  2. 2.ARC Centre of Excellence for Coral Reef StudiesJames Cook UniversityTownsvilleAustralia

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