. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. UPTAKE OF PHOSPHATE IONS BY THE OYSTER 125 drop in the mean specific activity of most tissues at 64 hours as compared with 16 hours is not significant. Individual variation was so great that uptake rates are only approximated by this method. This is particularly true in the case of the di- gestive gland, with a very low and variable uptake rate. It appears, however, that a steady state is reached at about 16 hours. Several oysters which did not open while in the labelled sea water were also as- sayed. None showed any radioac
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. UPTAKE OF PHOSPHATE IONS BY THE OYSTER 125 drop in the mean specific activity of most tissues at 64 hours as compared with 16 hours is not significant. Individual variation was so great that uptake rates are only approximated by this method. This is particularly true in the case of the di- gestive gland, with a very low and variable uptake rate. It appears, however, that a steady state is reached at about 16 hours. Several oysters which did not open while in the labelled sea water were also as- sayed. None showed any radioactivity in the tissues, although in most cases the S i 2 <r UI a. (ft UJ tr o o £ 16 64 HOURS IN P* FIGURE 1. Uptake of phosphate ions labelled with P32 from sea water by groups of oysters. See text for description. pallial border was exposed, for the shells had been chipped to facilitate opening them when radioactive. 2. Uptake of phosphate ions by excised oyster tissues Excised tissues from three oysters were placed in P32-labelled sea water which was aerated and maintained at 18° C. in a water bath. The pieces of tissue were about one in size. The amount of exposed cut surface varied, being compara- tively little in the case of gills and great in the digestive gland and adductor muscle. After time intervals comparable to those in the preceding study, duplicate samples. 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 Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
