John Dawson jdwsn at
Mon Mar 18 15:00:16 EST 2002

A more recent publication:

J. C. Bythell, P. Pan, J. Lee. Three-dimensional morphometric measurements
of reef corals using underwater photogrammetry techniques. Coral Reefs
(2001) 20: 193-199

John P. Dawson
Ph.D. candidate - Department of Geoscience
121 Trowbridge Hall | The University of Iowa | Iowa City, IA 52242
Tel: (319)-335-1805 | Fax: (319)-335-1821    | jdwsn at

On Mon, 18 Mar 2002, C. Mark Eakin wrote:

> People have also used wax and dye dip methods that assume that the amount
of material retained on the skeleton is a
> reasonable estimate of surface area.  In the former, the wax adhering to
the skeleton is melted back off and weighed.  In the
> latter, the dye is suspended in a known volume of sovlent and tested
colorometrically.  There are also photographic
> techniques that might be applicable, but could be difficult to apply to P.
damicornis.  See the following:
> Hoegh-Guldberg, O. (1988). "A method for determining the surface area of
corals." Coral Reefs 7(3): 113-116.
> Ben-Zion, M., Y. Achituv, et al. (1991). "A photographic, computerized
method for measurements of surface area in Millepora."
> Symbiosis 10: 115-121.
> "M.G. Visram" wrote:
>       Dear coral listers, Does anyone know of an accurate and reliable
method for estimating the areal density of
>       zooxanthellae in Pocillopora damicornis besides the use of tin-foil
paper, which I find neither acurate nor
>       practical for this species due to the thin and intricate branching
nature of the skeleton. many thanks, Shakil
>       Visram
> --
> C. Mark Eakin, Ph.D.
> Chief of NOAA Paleoclimatology Program and
> Director of the World Data Center for Paleoclimatology
> NOAA/National Geophysical Data Center
> 325 Broadway E/GC
> Boulder, CO 80305-3328
> Voice: 303-497-6172                  Fax: 303-497-6513
> Internet: mark.eakin at

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