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Query: keyword: "Amphitoxin"

AuthorsN.J. de Voogd, J.J.H. Haftka, B.W. Hoeksema
TitleEvaluation of the ecological function of amphitoxin in the reef-dwelling sponge Callyspongia (Euplacella) biru (Haplosclerida: Callyspongiidae) at southwest Sulawesi, Indonesia
JournalContributions to Zoology
Volume74, 1/2
Year2005
Pages51-59
ISSN13834517
KeywordsAmphitoxin; Callyspongia (Euplacella) biru; Fungia fungites; Indonesia; Porifera; Spatial interaction
AbstractThe ecological function of the secondary metabolite amphitoxin produced by Callyspongia (Euplacella) biru is evaluated by a forced confrontation with the free-living scleractinian coral Fungia fungites at different exposure times. Our major goal was to determine whether such a forced confrontation with a spatial comĀ­petitor would cause a significant change in the concentration of amphitoxin in the sponge tissue, indicating a regulatory mechanism of amphitoxin production. Firstly, the concentrations of amphitoxin of sponge fragments submitted to forced confrontation with a mushroom coral did not differ between the exposure times. Secondly, all sponge fragments, including the controls had a consistently lower amphitoxin concentration during the course of the experiment than the natural variation. Thirdly, the concentration of amphitoxin varied substantially between specimens implying that other ecological factors besides spatial competition regulate the production of bioactive compounds of C. biru.
Classification42.72
Document typearticle
Download paperpdf document http://www.repository.naturalis.nl/document/43077