. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 292 K. P. SEBENS TABLE II Alcyonium larval metamorphosis experiments conducted during August 1980 to May 1981 Lithothamnium Waernia Sea Water Control Days 1 0 0 0 2 ± 0 0 3 ± ** 0 0 5 ± 0 ± 10 ± ** 0 ± 49 ± ** 0 0 194 ± ** ± 0 Treatments without metamorphosis: Halisarca (sponge), Aplidium (tunicate), Alcyonium, Litho- thamnium supernatant, Waernia supernatant, Halisarca supernatant, Aplidium supernatant, Alcyonium supernatant. All treatments were given 2-3 h
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 292 K. P. SEBENS TABLE II Alcyonium larval metamorphosis experiments conducted during August 1980 to May 1981 Lithothamnium Waernia Sea Water Control Days 1 0 0 0 2 ± 0 0 3 ± ** 0 0 5 ± 0 ± 10 ± ** 0 ± 49 ± ** 0 0 194 ± ** ± 0 Treatments without metamorphosis: Halisarca (sponge), Aplidium (tunicate), Alcyonium, Litho- thamnium supernatant, Waernia supernatant, Halisarca supernatant, Aplidium supernatant, Alcyonium supernatant. All treatments were given 2-3 hours light per day at 8-12°C, then 5°C after day 49. Values are mean number of larvae metamorphosed, out of an initial 15, ± for three replicates. ** Denotes treatments significantly different than the control (ANOVA, P < at least). coralline alga was necessary. Constant aeration of sea water alone (1982) did not induce metamorphosis. Therefore, it is unlikely that the addition of oxygen to the water by the crustose algae could, by itself, be the factor mediating induction of metamorphosis. I considered using dead coralline algal skeletons to see if the in- duction was mediated by surface texture rather than by contact chemoreception. However, this would not differentiate the potential role of surface texture of the live ALCYONIUM SIDERIUM METAMORPHOSIS CORALLINE 3. 9 10 49 9/24/80 194 4/4/81 DAYS FIGURE 1. Number of larvae that had metamorphosed (of initial 15), during the 1980 experiments, on each of the three coralline algae replicates (Lithothamnium glaciate), and on the crustose red alga Waernia mirabilis. One of the 3 replicates in the control group also had some 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. ); Ma
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
