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Effects of aggregation and species identity on the growth and behavior of mushroom corals

Journal Coral Reefs
Publisher Springer Berlin / Heidelberg
ISSN 0722-4028 (Print) 1432-0975 (Online)
Issue Volume 27, Number 4 / December, 2008
Category Note
DOI 10.1007/s00338-008-0403-6
Pages 881-885

Subject Collection Earth and Environmental Science

SpringerLink Date Wednesday, August 06, 2008

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Effects of aggregation and species identity on the growth and behavior of mushroom corals
R. Elahi1

(1) Department of Biology, University of Washington, 24 Kincaid Hall, Box 351812, Seattle, WA 98195-1800, USA

Received: 25 January 2008 Revised: 31 May 2008 Accepted: 7 July 2008 Published online: 6 August 2008

Abstract: Aggregations of fungiid corals are common on Indo-Pacific reefs, but visible signs of direct competition are uncommon. Although negative interactions between fungiids are generally thought to be negligible, the results of an experiment manipulating aggregation and species identity indicated that per capita calcification rates of Fungia concinna were depressed when surrounded by five other Fungia. The reduction in growth did not vary if neighbors were Fungia concinna or Fungia paumotensis, suggesting that these two related species overlap substantially in their competitive impacts. However, mucus production and movement occurred more frequently in heterospecific than conspecific groups. These results suggest that there is a cost to group living, but depressed growth must be weighed against the potential benefits of successful spawning in conspecific aggregations.

Electronic supplementary material The online version of this article (doi:10.1007/s00338-008-0403-6) contains supplementary material, which is available to authorized users.


Communicated by Ecology Editor Professor Peter Mumby
 

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I do not have the numbers in front of me now, but I do remember that it was significant, somewhere in the range of 10%+
 
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