. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 314 C. D. HARVELL AND M. LABARBERA. FIGURE 1. Colony architecture and polyp placement on Abietenaria rigida. P, polyp; scale, 1 cm. proportional to velocity squared and the coefficient of drag for a disc is constant over a broad range of Reynolds numbers (Vogel, 1981). At low velocities, water velocity was measured by timing the passage of a dye cloud over a known distance. Stiffened colonies were prepared by soaking selected fresh colonies in distilled water for two hours and drying them overnight at 60°C. A steel wire (
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 314 C. D. HARVELL AND M. LABARBERA. FIGURE 1. Colony architecture and polyp placement on Abietenaria rigida. P, polyp; scale, 1 cm. proportional to velocity squared and the coefficient of drag for a disc is constant over a broad range of Reynolds numbers (Vogel, 1981). At low velocities, water velocity was measured by timing the passage of a dye cloud over a known distance. Stiffened colonies were prepared by soaking selected fresh colonies in distilled water for two hours and drying them overnight at 60°C. A steel wire ( cm diameter) was carefully threaded up the central axis of the colony, the colony was impregnated with cyanoacrylate cement, and then sprayed with five coats of an aerosol acrylic plastic. To quantify the difference between natural and stiffened colonies, the flexural stiffness El (see Wainwright et al., 1976) was determined by measuring the force necessary to deflect the specimens through known distances and applying the standard formula for deflection of a cantilever beam. The mean value of El for fresh A. rigida colonies was X 10~6 Nm2; the mean El for stiffened colonies was X 10~4 Nm2. Detachment strength, the force required to detach a colony from the substrate, was measured on 21 colonies ranging from cm high. Force was applied. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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