Skeleton growth and density pattern of the temperate, zooxanthellate scleractinian Cladocora caespitosa from the Ligurian Sea (NW Mediterranean)

A Peirano, C Morri, CN Bianchi
1999 Marine Ecology Progress Series  
X-radiographs of corallites of the zooxanthellate coral Cladocora caespitosa (L.), collected in the Ligurian Sea bctween 3 and 27 m depth, were examined. C. caespitosa deposits 2 bands yr-'; the high density band is deposited during winter (November to March) while the low density band is deposited in summer. Average growth rates ranged from 1.36 L 0.58 to 4.42 i 1.61 mm yr-' No differences in the tirning of band deposition were found between shallow and deep colonies. A companson of the band
more » ... ttern with monthly temperature-irradiance measurements from the Ligurian Sea, and with literature data on the photosynthetic efficiency of zooxanthellae, led us to hypothesise a mechanism of growth with a low dependency on autotrophy. KEY WORDS: Coral .
doi:10.3354/meps185195 fatcat:6kwx2dwfrfd3zfjfup2nonhrei