Document Detail

High potential for formation and persistence of chimeras following aggregated larval settlement in the broadcast spawning coral, Acropora millepora.
MedLine Citation:
PMID:  21752820     Owner:  NLM     Status:  MEDLINE    
In sessile modular marine invertebrates, chimeras can originate from fusions of closely settling larvae or of colonies that come into contact through growth or movement. While it has been shown that juveniles of brooding corals fuse under experimental conditions, chimera formation in broadcast spawning corals, the most abundant group of reef corals, has not been examined. This study explores the capacity of the broadcast spawning coral Acropora millepora to form chimeras under experimental conditions and to persist as chimeras in the field. Under experimental conditions, 1.5-fold more larvae settled in aggregations than solitarily, and analyses of nine microsatellite loci revealed that 50 per cent of juveniles tested harboured different genotypes within the same colony. Significantly, some chimeric colonies persisted for 23 months post-settlement, when the study ended. Genotypes within persisting chimeric colonies all showed a high level of relatedness, whereas rejecting colonies displayed variable levels of relatedness. The nearly threefold greater sizes of chimeras compared with solitary juveniles, from settlement through to at least three months, suggest that chimerism is likely to be an important strategy for maximizing survival of vulnerable early life-history stages of corals, although longer-term studies are required to more fully explore the potential benefits of chimerism.
E Puill-Stephan; M J H van Oppen; K Pichavant-Rafini; B L Willis
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-07-13
Journal Detail:
Title:  Proceedings. Biological sciences / The Royal Society     Volume:  279     ISSN:  1471-2954     ISO Abbreviation:  Proc. Biol. Sci.     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-01-12     Completed Date:  2012-06-04     Revised Date:  2013-06-28    
Medline Journal Info:
Nlm Unique ID:  101245157     Medline TA:  Proc Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  699-708     Citation Subset:  IM    
AIMS@JCU, James Cook University, Douglas Campus, Townsville, Queensland 4810, Australia.
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MeSH Terms
Adaptation, Physiological
Anthozoa / genetics,  physiology*
Chimera / genetics*,  physiology
Larva / genetics,  physiology
Microsatellite Repeats
Reproduction / physiology

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