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Closed Access item Experimental comparison of skeletal growth rates in the cold-water coral Madrepora oculata Linnaeus, 1758 and three tropical scleractinian corals

Authors:Orejas, Covadonga
Ferrier-Pagès, Christine
Reynaud, Stéphanie
Tsounis, Georgios
Allemand, Denis
Gili, Josep Maria
Keywords:Aquaria experiments, buoyant weight, cold-water corals (CWC), Madrepora oculata, skeletal growth rates, tropical corals
Issue Date:31-Aug-2011
Citation:Journal of Experimental Marine Biology and Ecology 405 (1-2): 1–5 (2011)
Abstract:The skeletal growth rate of the cold-water coral (CWC) Madrepora oculata Linnaeus, 1758 was measured during 3 months under controlled conditions (at 12 °C in the dark, fed five times a week), using the buoyant weight technique. In order to interpret CWC growth in a wider context, we also measured the skeletal growth rates of three tropical scleractinian species: Stylophora pistillata (Esper, 1797), Turbinaria reniformis (Bernard, 1896) and Galaxea fascicularis (Linnaeus, 1767), likewise maintained under controlled conditions (at 25 °C, 250 μmol photons m− 2 s− 1, either fed five times a week or unfed). The skeletal growth rate of M. oculata was equal to 0.20 ± 0.09% d− 1 (mean ± SD), similar to the growth of unfed and fed nubbins of G. fascicularis (0.14 ± 0.01% d− 1 and 0.36 ± 0.11% d− 1 respectively) despite the large differences in seawater temperatures. Skeletal growth rates of S. pistillata (1.20 ± 0.49% d− 1 to 2.68 ± 0.65% d− 1 unfed/fed) and T. reniformis (0.78 ± 0.34% d− 1 to 0.94 ± 0.14% d− 1 unfed/fed) were significantly higher. These results confirm that the CWC M. oculata can grow at rates that are comparable to those of some tropical corals, despite the lack of autotrophy (lacking zooxanthellae) and the low temperatures of its environment
Description:5 pages, 2 figures, 2 tables
Publisher version (URL):http://dx.doi.org/10.1016/j.jembe.2011.05.008
Appears in Collections:(ICM) Artículos

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