Abstract
The relationship between sponge size, habitat and shape was studied in the encrusting sponge Crambe crambe (Schmidt, 1862), which is distributed widely throughout the shallow Mediterranean littoral. Examination of sponge patches in shaded and well-illuminated habitats showed that the degree of peripheral irregularity of the edges of a patch is directly related to patch size. This relationship is valid only for sponges of >100 mm2 in area. Photophilic and sciaphilous sponges display different growth forms. The pattern of growth is interpreted in terms of competition for space. The directional growth of sciaphilous sponges may be due to the presence of dominant neighbours that are good space competitors, and the irregular growth of photophilic sponges to the absence of such neighbours.
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Communicated by J. M. Pérès, Marseille
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Becerro, M.A., Uriz, M.J. & Turon, X. Trends in space occupation by the encrusting sponge Crambe crambe: variation in shape as a function of size and environment. Marine Biology 121, 301–307 (1994). https://doi.org/10.1007/BF00346738
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DOI: https://doi.org/10.1007/BF00346738