. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 382 J. T. TURNER ««£*«*&,•?. FIGURE 3. Contents of Centropages velificatus fecal pellets from the station on 24 November 1983 (0605). a. and b. Thalassiosira sp. cells (T), c. Thalassiosira sp. (T) and small centric (SC) diatom cells, d. Thalassiosira sp. fragments (T), e. Prorocentrum compression cell (arrow), f. crustacean fragment (arrow). congeners (Turner 1984a and references therein; Conley and Turner, 1985; Turner etai, 1985). The apparently frequent use of carnivory by C. velificatus is also suggested by quantita
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 382 J. T. TURNER ««£*«*&,•?. FIGURE 3. Contents of Centropages velificatus fecal pellets from the station on 24 November 1983 (0605). a. and b. Thalassiosira sp. cells (T), c. Thalassiosira sp. (T) and small centric (SC) diatom cells, d. Thalassiosira sp. fragments (T), e. Prorocentrum compression cell (arrow), f. crustacean fragment (arrow). congeners (Turner 1984a and references therein; Conley and Turner, 1985; Turner etai, 1985). The apparently frequent use of carnivory by C. velificatus is also suggested by quantitative grazing data from the northern Gulf of Mexico (Turner and Tester, 1986; Tester and Turner, 1986). Regression coefficients for grazing versus available phytoplankton gave poor correlation. Such uncoupling of grazing effort and phyto- plankton abundance would be expected if C. velificatus feeds primarily as a carnivore, or selectively upon less-abundant phytoplankters. Although the presence of primarily large phytoplankton cells in fecal pellets is suggestive of selective grazing on large particles, such a conclusion is not without ambiguities. For reasons detailed in Turner (1984c, p. 279) and (1984 d, p. 82), it is impossible to realistically make SEM analyses of fecal pellets quantitative. Further, it is not clear why Prorocentrum compression cells were common in pellets but un-. 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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