Observations on the continuous culture of a planktonic phagotrophic protozoan

Feeding by the zooflagellate Pseudobodo sp. on the picoplanktonic prasinomonad Micromonas pusilla

“…This has not yielded the clear-cut results others have obtained by studying steady-state chemostat cultures of ciliates (Hamilton & Preslan 1970, Droop & Scott 1982 or dilute batch cultures of zooflagellates in exponential phase (Fenchel 1982b). The difficulties encountered in the present study may have been partly due to deficiencies in the data collected or the estimation procedures used.…”

The role of heterotrophic microflagellates in plankton communities

“…Previous studies have noted that at least some bacterivorous ciliates will cease feeding if the bacterial concentration falls below a critical "threshold" concentration (Salt, 1967;Hamilton & Preslan, 1970;Herk et al, 1976;Fenchel, 1980a). This behavior is presumably a mechanism to conserve pm (no.…”

“…While most of these investigations have been performed with a growing bacterial population, Hamilton and Preslan (1970) demonstrated that a static bacterial population could be used to grow the ciliate Uronema sp. at steady state.…”

Effects of energy related activities on the plankton of the Chesapeake Bay. Section 1. Progress report, 1 August 1976--30 September 1977

“…However, the small size and often simple life cycle of the various micro-zooplankters suggest both very rapid metabolic and growth rates (Fenchel, 1974;Johannes, 1965;Zeuthen, 1947) and an ability to utilize food sources of a size largely unavailable to the larger crustacean grazers (Anraku and Omori, 1963;Marshall, 1973;Nival and Nival, 1976), giving this fraction of the zooplankton at least the potential to influence profoundly the trophic dynamics within the planktonic 1 102 assemblage. The experimental work which has been done to date (Blackbourn, 1974;Dewey, 1976;Gold, 1973;Hamilton and Preslan, 1970;Heinbokel, 1977 --and in prep. ;Johansen, 1976;PaffenhEffer, 1971;Spittler, 1973) (1977) estimated that this single component of the nicro-zooplankton would, at times, be consuming material equivalent to more than 20% of the total planktonic primary production.…”

“…1.-=.1 31 Hamilton et al, 1970;Carpenter et al, 1974a;Carpenter, 1973;Carpenter et al, 1972) and zooplankton (Heinle, 1969;Carpenter et al, 1974b).…”