. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Figure 3. Symbiodinium in the \esicle cndoderm of (a) Bunodeopsis anlilliensix and (b) B globulifera showing multiple membranes (f): nu- cleus (n); chromosomes (chr); chloroplast (chl); pyrenoid (p); and pyrenoid stalk (ps). Scale bar = 1 ^m. bution of symbionts within the anemones was markedly different between the two species of Bunodeopsis (Fig. 4) (Two-factor ANOVA: F, (species)() = , p > ; region)() ~ ; < p < ; F() = ; < p < ). B. globulifera a
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Figure 3. Symbiodinium in the \esicle cndoderm of (a) Bunodeopsis anlilliensix and (b) B globulifera showing multiple membranes (f): nu- cleus (n); chromosomes (chr); chloroplast (chl); pyrenoid (p); and pyrenoid stalk (ps). Scale bar = 1 ^m. bution of symbionts within the anemones was markedly different between the two species of Bunodeopsis (Fig. 4) (Two-factor ANOVA: F, (species)() = , p > ; region)() ~ ; < p < ; F() = ; < p < ). B. globulifera anemones had a higher proportion of symbionts in the tentacles (44%) than B. antilliensis (10%), which had most symbionts in the scapus and basal disk (85%) (Tukey-Kramer multiple comparisons test; < p < ). The diel cycles of symbiont cell division were phased in both B. antilliensis and B. globulifera (Fig. 5), with peak mitotic indices in the early morning. Symbionts from B. globulifera had a higher chlorophyll a content, ±, than those from B. antilliensis. ± pg-ceir1 (/(8) = ; < p ). The ratio of chlorophylls a:c2 was higher for symbionts from B. globulifera, ± , than from B. antilliensis, ± (f(8) = ; <p<). Expansion and contraction behavior In situ, almost all anemones of both species of Buno- deopsis were expanded at night, although marked differ- ences in expansion and contraction behavior were ob- served during the day (Fig. 6). Under illumination, B. antilliensis anemones were contracted, whereas B. glob- ulifera remained expanded, except at very high irradiances experienced at midday. The proportion of B. globulifera anemones in an expanded posture was found to be in- versely related to irradiance (Fig. 7; /f29) = ; < p < ). Under laboratory conditions of irradiance, untreated and cold-stripped anemones displayed patterns of expansion and contraction behavior
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
