Relationship of Sponge Macrofauna with the Morphology of their Hosts in the North Aegean Sea

Abstract The associated macrofauna of four Aegean Sea sponge species ( Agelas oroides, Petrosia ficiformis, Ircinia variabilis and Aplysina aerophoba ) was compared. The total number of individuals and species was found to be related to sponge volume for all sponge species. The associated macrofaunal weight per individual on all sponge species was negatively correlated with sponge volume. Sponge complexity, as measured by sponge surface area to biomass ratio, was not a consistent predictor of associated macrofauna abundance or diversity. Sponge macrofauna species were not host specific and their relative abundances differed among sponge species.