. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 8 ppm Sr (NSW) 100- 80- 60 50 40 Degrees 2-Thela. 60 50 40 Degrees 2-Theta 30 Figure 1. X-ray diffraction spectra of mineralized shell and statolith from indicated treatments. All material was aragonite and there was no evidence of paracrystalline or amorphous material in the deformed shells (3 and 80 ppm Sr). separately using a one-way ANOVA followed by the SNK. Calculations were performed with SAS. Results A'-rav crystal structure Atomic diffraction spectra of abnormal shells and statoliths from embryos reared in the 3 and
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 8 ppm Sr (NSW) 100- 80- 60 50 40 Degrees 2-Thela. 60 50 40 Degrees 2-Theta 30 Figure 1. X-ray diffraction spectra of mineralized shell and statolith from indicated treatments. All material was aragonite and there was no evidence of paracrystalline or amorphous material in the deformed shells (3 and 80 ppm Sr). separately using a one-way ANOVA followed by the SNK. Calculations were performed with SAS. Results A'-rav crystal structure Atomic diffraction spectra of abnormal shells and statoliths from embryos reared in the 3 and 80 ppm Sr media were indistinguishable from spectra of normal tis- sue (Fig. 1). All diffraction peaks observed for each sam- ple were identified as belonging to the aragonite form of calcium carbonate. There were no significant shifts in peak position, changes in peak heights, nor evidence of amorphous or paracrystalline structure in the abnormal mineralized tissue. H 'hole embryo concentrations of calcium, strontium. and magnesium Total calcium at the end of embryogenesis (192 h) was diminished by approximately 80% in those embryos reared in the absence of strontium as compared to those organisms from strontium-containing media; total cal- cium of embryos from the 3 and 80 ppm Sr treatments were not significantly different from levels of the control organisms (8 ppm Sr, NSW, Fig. 2A). Thus, no correla- tion between total calcium and shell morphology was ev- ident. Profiles for calcium concentration paralleled min- eralization in all media containing strontium (Fig. 2A). At 96 h, a small but statistically significant increase in total calcium was observed coincident with the appear-. 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 Laborat
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
