. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 384 J. T. TURNER. FIGURE 6. Contents of Centropages velificatus fecal pellets from the station on 30 November 1983. a. Skeletonema costatitm fragments (arrows), b. Skeletonema costatum (S) and Thalassiosira sp. (T) frag- ments, c. intact centric diatom cell (arrow), d. Thalassiothrix sp. fragments (arrow), e. fragment of an unidentified dinoflagellate (arrow), f. crustacean remains (arrows). common in the water (11% of total cells) on 15 December 1982, whereas the similarly large (33 /urn diameter, or larger) diatom Coscinod
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 384 J. T. TURNER. FIGURE 6. Contents of Centropages velificatus fecal pellets from the station on 30 November 1983. a. Skeletonema costatitm fragments (arrows), b. Skeletonema costatum (S) and Thalassiosira sp. (T) frag- ments, c. intact centric diatom cell (arrow), d. Thalassiothrix sp. fragments (arrow), e. fragment of an unidentified dinoflagellate (arrow), f. crustacean remains (arrows). common in the water (11% of total cells) on 15 December 1982, whereas the similarly large (33 /urn diameter, or larger) diatom Coscinodiscus radiatus was not observed in these pellets even though it comprised 41% of available cells. In other cases, large Thalassiosira spp. cells were abundant in pellets, but since they were also abundant in the water, this pattern is more indicative of nonselective than selective feeding. Conversely, the disproportionately high abundances in pellets of elongate cells of Thalassiothrix sp. or Skeletonema costatum cells from elongate chains, when these taxa comprised only a small proportion of available cells, may indicate size selection on 27 and 30 November 1983. In short, there was no consistent pattern of ingestion of large versus small, solitary versus chain-forming, or diatom versus dinoflagellate cells. The production of fecal pellets containing primarily fine-grained silt particles reveals that small particles can also be ingested in large numbers. Centropages velifi- catus apparently employs a variety of mechanisms to capture food from a broad range. 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, Alfr
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