1887

Abstract

SUMMARY: The specific growth and feeding rates of GL grown axenically in proteose-peptone yeast-extract medium and mono-xenically in suspensions of the bacterium were studied. The relation between the initial concentration of substrate, whether bacteria or soluble organic complexes, and the maximum yield of ciliates was linear, although some inhibition was noted at higher substrate concentrations. The effective yields of Tetrahymena are 9.1% (carbon to carbon) in axenic cultures and 50% (dry-weight bacteria to dry-weight ciliate) in monoxenic cultures. The maximum growth rates at 25° in axenic and monoxenic cultures were 0.20 and 0.22 hr, respectively. Carbon balance studies on axenic cultures suggested that of the carbon utilized during growth 36.5% was incorporated into the Tetrahymena and 69% was respired. The removal rates of from suspension by were studied and there was evidence which suggested that the individual feeding rate of a ciliate was governed by the concentration of ciliates as well as the concentration of bacteria present. From these observations a model for ciliate feeding was derived.

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/content/journal/micro/10.1099/00221287-54-3-343
1968-12-01
2021-07-28
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References

  1. BURBANCK W. D. 1942; Physiology of the ciliate Colpidium colpoda. I. The effect of various bacteria as food on the division rate of Colpidium colpoda.. Physiol. Zoöl. 15:342
    [Google Scholar]
  2. COLEMAN G. S. 1964; The metabolism of Escherichia coli and other bacteria by Entodinium caudatum.. J. gen, Microbiol. 37:209
    [Google Scholar]
  3. CONTOIS D. E. 1959; Kinetics of bacterial growth: relationship between population density and specific growth rate of continuous cultures.. J. gen. Microbiol. 21:40
    [Google Scholar]
  4. Cox F. E. G. 1967; A quantitative method for measuring the uptake of carbon particles by Tetrahymena pyriformis.. Trans. Am. microsc. Soc. 86:261
    [Google Scholar]
  5. CURDS C. R. 1963; The flocculation of suspended matter by Paramecium caudatum.. J. gen. Microbiol. 33:357
    [Google Scholar]
  6. CURDS C. R. 1967; Continuous culture. A method for the determination of food consumption by ciliated protozoa. In Proceedings of the Symposium on Methods of Study of Soil Ecology.. Ed. by J. Philipson. Paris; UNESCO. (In the Press.):
    [Google Scholar]
  7. CURDS C. R., VANDYKE J. M. 1966; The feeding habits and growth rates of some fresh-water ciliates found in activated-sludge plants.. J. appl. Ecol. 3:127
    [Google Scholar]
  8. CURDS C. R., COCKBURN A., VANDYKE J. M. 1968; An experimental study of the role of the ciliated protozoa in the activated-sludge process.. Wat. Pollut. Control 67:312
    [Google Scholar]
  9. CUTLER D. W., CRUMP L. M. 1924; The rate of reproduction in artificial culture of Colpidium colpoda.. Part III. Biochem. J. 18:905
    [Google Scholar]
  10. ENGELMANN M. D. 1961; The ro1e of soil arthropods in the energetics of an old field community.. Ecol. Monogr. 31:221
    [Google Scholar]
  11. HADJIPETROU L. P., GERRITS J. P., TEULINGS F. A. G., STOUTHAMER A. H. 1964; Relation between energy production and growth of Aerobacter aerogenes.. J. gen. Microbiol. 36:139
    [Google Scholar]
  12. HEAL O. W. 1967 a; Quantitative studies on soil amoebae.. In Progress in Soil Biology. Ed. by Graff O., Satchell J. E. p. 120 Amsterdam: North Holland Publ. Co.;
    [Google Scholar]
  13. HEAL O. W. 1967 b; Methods of study of soil protozoa. In Proceedings of the Symposium on Methods of Study of Soil Ecology.. Ed. by Philipson J. Paris: UNESCO. (In the Press.);
    [Google Scholar]
  14. HERBERT D., ELSWORTH R., TELLING R. C. 1956; The continuous culture of bacteria; a theoretical and experimental study.. J. gen. Microbiol. 14:601
    [Google Scholar]
  15. MACFADYEN A. 1963; Heterotrophic productivity in the detritus food chain in soil.. Proc. 16 int. Congr. Zool. 4:318
    [Google Scholar]
  16. MCMAHON J. W., RIGLER F. H. (1965); Feeding rate of Daphnia magna Straus in different foods labelled with radioactive phosphorus.. Limnol. Oceanogr. 10:105
    [Google Scholar]
  17. MONOD J. 1942; Recherches sur la Croissance des Cultures Bactériennes.. Paris: Hermann and Cie.;
    [Google Scholar]
  18. PILLAI S. C. 1942; Further studies on the role of the protozoa in the activated-sludge process.. Curr. Sci. 11:437
    [Google Scholar]
  19. PILLAI S. C., SUBRAHMANYAN V. 1944; The role of protozoa in the aerobic purification of sewage.. Nature, Lond. 154:179
    [Google Scholar]
  20. PROPER G., GARVER J. C. 1966; Mass culture of the protozoa Colpoda steinii.. Biotechnol. Bioengng 8:287
    [Google Scholar]
  21. RICHMAN S. 1958; The transformation of energy by Daphnia pulex.. Ecol. Monogr. 28:273
    [Google Scholar]
  22. SEAMAN G. R. 1955; Metabolism of free-living ciliates. In Biochemistry and Physiology of Protozoa.. Ed. by Hutner S. H., Lwoff A. Vol. 2,: p. 91
    [Google Scholar]
  23. SEAMAN G. R. 1961; Some aspects of phagotrophy in Tetrahymena.. J. Protozool. 8:212
    [Google Scholar]
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