[Coral-List] Another question about coral disease
joshua at nova.edu
Wed Mar 8 07:58:19 EST 2006
It is not clear from the photos, but in my opinion, there is some form of
corallivory occurring on those colonies. I base this very preliminary
assessment on the pattern of color loss - pale areas emanating from the
base of the colony towards its periphery. There are any number of gastropod
corallivores that cause similar patterns of tissue loss in other species in
other areas. If you have not observed corallivore activity during your
dives, try diving at multiple times per day and throughout the night as
foraging frequency may be episodic rather than continuous.
In order to confirm disease, it is necessary to obtain tissue samples and
have them analyzed by experts familiar with growing coral pathogens in
culture. Even then, definitive diagnosis is very difficult since so few
agents of coral diseases have been identified.
Good luck with solving this concern.
Nova Southeastern University
At 11:25 AM 3/8/2006 +0930, Victor Gomelyuk wrote:
>These photos have been taken at Gove/Nhulunbuy area, Arafura sea, the
>Northern Territory, Australia (GPS reading: S12 04.413; E136 35.976)
>White spots and bands on Acropora corals are not related to coral
>bleaching (quite often affected colonies are located 0.5-1 m deeper than
>unaffected colonies). Also, spots location and distribution pattern
>excludes coral bleaching as a cause of these white spots). Predators like
>Crown-of-thorn starfish are not found in the area and Drupiella
>gastropods are rare.
>What is that, a "white band disease"?
>Your suggestions are appreciated
>Dr Victor Gomelyuk
>Parks & Wildlife Commission
>of the Northern Territory
>Darwin, NT, Australia 0812
>Coral-List mailing list
>Coral-List at coral.aoml.noaa.gov
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