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Hydrobiologia

, Volume 805, Issue 1, pp 89–96 | Cite as

Versatile habitat conditioning by damselfish cultivating turf algae on giant clams

  • Patrick C. Cabaitan
  • Christopher Malvicini
  • Frederico Sabban
  • Cecilia Conaco
Primary Research Paper

Abstract

Territorial farmer damselfishes are facilitators that selectively farm turf algae in degraded reef patches. The effect of damselfish on algae and corals has been widely studied but the ability of the damselfish to establish farms on other substrates is less understood. In the giant clam ocean nursery in Bolinao, northwestern Philippines, farmer damselfishes, particularly Stegastes nigricans, Dischistodus prosopotaenia, and D. chrysopoecilus, make use of giant clam shells as substrate for turf algae farms. To facilitate growth of the algal crop, damselfishes reduce shading and create more space for cultivation by trimming the overhanging mantles of Tridacna gigas within their colonies. This form of habitat modification occurs within weeks, with affected clams exhibiting mantle lesions and turf algae growth on their shells. These observations suggest that damselfishes can potentially extend their farmed turf algae patches in a manner that, although not typical of natural reef conditions, may be facilitated by the availability of giant clam shells as substrate. The versatility of damselfishes in establishing turf algae farms on a different substrate and their ability to condition the habitat through active modification of other reef biota emphasize the potential of the farmer damselfish to significantly influence reef community structure and biodiversity.

Keywords

Tridacna gigas Stegastes nigricans Facilitation Farming behavior Degraded reef 

Notes

Acknowledgements

The authors wish to acknowledge the Bolinao Marine Laboratory for logistical support. We thank Fernando Castrence and Renato Adolfo for field assistance. This work was supported by a grant from the Marine Science Institute of the University of the Philippines and National Geographic Society (ASIA-08-15). Christopher Malvicini was supported by the Skidmore College Summer Funded Internship Award Program 2016.

Supplementary material

10750_2017_3284_MOESM1_ESM.pdf (585 kb)
Online Resource 1 (PDF 585 kb)
10750_2017_3284_MOESM2_ESM.pdf (73 kb)
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10750_2017_3284_MOESM3_ESM.pdf (109 kb)
Online Resource 3 (PDF 108 kb)

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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  1. 1.Marine Science InstituteUniversity of the Philippines, DilimanQuezon CityPhilippines
  2. 2.Skidmore CollegeSaratoga SpringsUSA

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