[Coral-List] sea urchin removal to prevent bioerosion

Sara Peck peck at hawaii.edu
Thu Feb 11 16:16:44 EST 2010

Does anyone know of ANY papers discussing the effect of removing all 
urchins from a shoreline/near shore area?
Thank you for your time.
Sara Peck, UH Sea Grant College Program Coastal Resources Extension Agent

At 09:31 AM 2/11/2010, Anders Knudby wrote:
>Hi Clement,
>1.5 years ago we started a project on the reef at Chumbe Island, Tanzania,
>where we regularly removed all D. setosum from a number of plots on the
>reef. We didn't use cages because we were interested specifically in
>exclusion of urchin only, not in exclusion of all similar-sized animals
>(e.g. large herbivorous fish). The project was meant as a pilot study, to
>see what effect we could expect from a full-scale removal of all urchins on
>the reef, as had been suggested by some. To my knowledge results are
>inconclusive so far, but may be firmed up and made available later.
>I would be interested to know your thoughts on the use of cages. Did you
>design a cage that would include/exclude only Diadema, or how do you control
>for other animals' response to the cages? Or are Diadema the only animals
>relevant for your study in the area?
>Anders Knudby
>knudby at gmail.com
>Coral-List mailing list
>Coral-List at coral.aoml.noaa.gov

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