Morphological controls on cannibalism in a planktonic marine phagotroph.

Morphological controls on cannibalism in a planktonic marine phagotroph. Research Abstract Details 

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Morphological controls on cannibalism in a planktonic marine phagotroph. Abstract Text:

Claire M Martel,Kevin J Flynn,Claire M Martel,Kevin J Flynn,

The ingestion preferences of planktonic protozoa influence the structure and succession of microbial communities and thus biogeochemical cycling within aquatic environments. Some predatory ciliates and flagellates are reported to switch to cannibalism when no suitable non-self prey items are available for consumption. However, the importance of cannibalism as a survival strategy, and its ubiquity within the planktonic protozoa is not known. We report the first attempt to quantify cannibalism in a phagotrophic marine dinoflagellate (Oxyrrhis marina). Cannibalistic Oxyrrhis cells seldom comprised >2% of any experimental population, including those in which all non-self prey items had been grazed to extinction. Such 'prey-deplete' cultures became dominated by homogeneous populations of highly motile Oxyrrhis that were morphologically unable (too similar in size) to cannibalise. That cannibalism can only occur when 'victim' and 'cannibal' cell size-classes of sufficient difference collide, suggests that cannibalism may be of limited use as a long-term survival strategy in phagotrophic protozoa.

Morphological controls on cannibalism in a planktonic marine phagotroph. Publishing Authors By Initials

CM Martel,KJ Flynn,CM Martel,KJ Flynn,

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Morphological controls on cannibalism in a planktonic marine phagotroph. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Protist

VOLUME: 159

Page Numbers: 41-51

Journal Abbreviation: Protist

ISSN: 1434-4610

DAY: 4

MONTH: 09

YEAR: 2007

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LANGUAGE: eng

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Grant and Affiliation Information for Morphological controls on cannibalism in a planktonic marine phagotroph.

AFFILIATION: Institute of Environmental Sustainability, Wallace Building, Swansea University, Singleton Park SA2 8PP, UK.

Country: Germany

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