[Coral-List] Another question about coral disease

Joshua Feingold joshua at nova.edu
Wed Mar 8 07:58:19 EST 2006

Victor -

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.

Joshua Feingold
Nova Southeastern University

At 11:25 AM 3/8/2006 +0930, Victor Gomelyuk wrote:
>Dear Colleagues,
>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
>Victor Gomelyuk
>Dr Victor Gomelyuk
>Marine Scientist
>Parks & Wildlife Commission
>of the Northern Territory
>Darwin,  NT,  Australia 0812
>tel +61(0)889209281
>fax 61(0)889209222
>Coral-List mailing list
>Coral-List at coral.aoml.noaa.gov

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