. The Biological bulletin. Biology; Zoology; Marine biology. Figure 1. Expansion states of M. cavernosa. Photographs of the five expansion states of M. cavernosa colonies. The scores in the lower right hand corner of each photograph are visual averages for the entire field of view. Note the variation between individual polyps in expansion state 2. See text for complete description of the expansion states. The second set of experiments involved the treatment of diurnal morph colonies with the photosynthetic inhibitor DCMU (3-(3,4-dichlorophenyl)-l,l-dimethyl- urea). Colonies used in the DCMU ex
. The Biological bulletin. Biology; Zoology; Marine biology. Figure 1. Expansion states of M. cavernosa. Photographs of the five expansion states of M. cavernosa colonies. The scores in the lower right hand corner of each photograph are visual averages for the entire field of view. Note the variation between individual polyps in expansion state 2. See text for complete description of the expansion states. The second set of experiments involved the treatment of diurnal morph colonies with the photosynthetic inhibitor DCMU (3-(3,4-dichlorophenyl)-l,l-dimethyl- urea). Colonies used in the DCMU experiments were transferred from the sea tables to a 10 liter aquarium several hours prior to the experiment and were kept in flowing aerated sea water until the start of the experiment at which time water flow was discontinued and DCMU added. One liter of DCMU saturated sea water was added to the aquarium to yield a theoretical concentration of 10"* M. Diffi- culties in dissolving the DCMU suggests a somewhat lower realized concentration (see Vandermuelen, Davis and Muscatine, 1972). Expansion was monitored at 30 min intervals starting 90 min prior to the DCMU addition and continuing for 120 min into the treatment. Light levels during the experiments were the same as those for the daytime darkening experiments. Results Activity cycles of the morphs The observations of daytime expansion for each of the colonies from three of the localities were subjected to a Q-mode cluster analysis using a quantified. 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 Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-; Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; HighWire Press. Lancaster, Pa. [etc. ] : Lanca
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