. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Figure 1. (a) Bunodeopsis untillicHxis and (h) B globiilil'era in ex- panded postures. Scale bar = 1 cm. B. antilliensis anemones experienced higher ambient ir- radiances than B. globulifera, receiving 53 ± 2 and 26 ± 2% of surface irradiance (means ± SE; N = 87), respec- tively (/(!i5, = ; ). Morphology and histology Of the anemones collected, the larger specimens were B antilliensis rather than B. globiilifcra: the basal disk diameters of the two species ranged from 5 to 34 mm and to mm, respectively
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Figure 1. (a) Bunodeopsis untillicHxis and (h) B globiilil'era in ex- panded postures. Scale bar = 1 cm. B. antilliensis anemones experienced higher ambient ir- radiances than B. globulifera, receiving 53 ± 2 and 26 ± 2% of surface irradiance (means ± SE; N = 87), respec- tively (/(!i5, = ; ). Morphology and histology Of the anemones collected, the larger specimens were B antilliensis rather than B. globiilifcra: the basal disk diameters of the two species ranged from 5 to 34 mm and to mm, respectively. However, vesicle size (di- ameter) was not related to body size for either B. antil- liensis (r(m = ; p > ) or B. globulifera (/f]0) = ; p > ). The vesicles of B. antilliensis (Fig. 2) were sig- nificantly larger than those of B. globulifera, with diam- eters (means ± SE) of ± and ± mm. re- spectively (/da, = ; < p < ). Assuming the vesicles to be spherical, this would represent mean vol- umes per vesicle of mm3 for B. antilliensis and mm3 for B. globulifera. Because the number of vesicles per anemone was directly related to body size for B. an- tilliensis (r(m = ; < p ), the mean number of vesicles per anemone was not compared between species. Light microscopy of paraffin sections demonstrated that the algal symbionts of Bunodeopsis were restricted to the endoderm, and were absent from the mesoglea and ec- toderm. Transmission electron microscopy (Fig. 3) re- vealed that each algal cell was contained within a peri- symbiont space, bounded by multiple membranes of host origin, typical of Cnidaria-dinoflagellate symbioses (Trench, 1971). The most obvious dinoflagellate ultra- structural features were the permanently condensed chro- mosomes in the nucleus (Dodge, 1973). Other distin- guishing dinoflagellate characteristics included a single or multistalked pyrenoid surrounded by a starch shea
Size: 1865px × 1340px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
