. The biology of hydra and of some other coelenterates, 1961. Hydra; Cnidaria; Ctenophora; Cnidaria; Hydra. 388 THE BIOLOGY OF HYDRA : 1961 TABLE 1 Food catching ability vs. Age Series I (about Artemia/hydranth—fresh sea water) Hydranth age (days) No. of hydranths No. of Artemia caught Artemia caught/hydranth 1 10 13 2 5 7 3 14 19 4 14 13 5 3 4 Series II (about ArtemJo/hydi ranth- —c irtificial sea wate !r) Hydranth age (days) No. of hydranths No. of Artemia caught Artemia caught/hydranth 1 299 73 .24 2 224 47 .21 3 187 47 .25 4 150 32 .21 5 104 51 .49 6 63 21 .3
. The biology of hydra and of some other coelenterates, 1961. Hydra; Cnidaria; Ctenophora; Cnidaria; Hydra. 388 THE BIOLOGY OF HYDRA : 1961 TABLE 1 Food catching ability vs. Age Series I (about Artemia/hydranth—fresh sea water) Hydranth age (days) No. of hydranths No. of Artemia caught Artemia caught/hydranth 1 10 13 2 5 7 3 14 19 4 14 13 5 3 4 Series II (about ArtemJo/hydi ranth- —c irtificial sea wate !r) Hydranth age (days) No. of hydranths No. of Artemia caught Artemia caught/hydranth 1 299 73 .24 2 224 47 .21 3 187 47 .25 4 150 32 .21 5 104 51 .49 6 63 21 .33 7 35 6 .17 8 10 3 .,30 TABLE 2 Ingestion time vs. Hydranth age Age of hydranths 0 12 3 4 No. of hydranths tested 31 26 52 18 16 Average time for ingestion in seconds 257 256 300 295 237 Campamilaria? How do they differ from young ones? Dr. Crowell (who did much of the basic work upon which this study is based) and I have measured a number of physiological capacities vs. age. Fig. 14. Photomicrograph of Cam- panular'ia ingesting Artemia labeled with fluorescent dyes ( % acrifla- vine). From a time lapse sequence. Note appearance of fluorescent digest in upright proximal to upper 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 Symposium on the Physiology and Ultrastructure of Hydra and Some Other Coelenterates (1961 : Coral Gables, Fla. ); Lenhoff, Howard M; Loomis, W. Farnsworth (William Farnsworth), 1914-. Coral Gables, Fla. , University of Miami Press
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Keywords: ., book, bookcentury1900, booksubjectcnidaria, booksubjectctenophora
