Marine Biology

, Volume 141, Issue 6, pp 1109-1115

First online:

Substrate preferences of a non-colonial kamptozoan, and its interactions with bryozoan hosts

  •  E. YakovisAffiliated withDepartment of Invertebrate Zoology, Faculty of Biology and Soil Science, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199034, Russia

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Results of substrate preference analysis for Loxosomella nordgaardi Ryland (Kamptozoa: Loxosomatidae) found in association with various bryozoan species in the White Sea are presented. Local water-current patterns, for the first time observed and documented in bryozoan colonies inhabited by non-colonial entoprocts, indicate the direct dependence of kamptozoans' feeding activity on the bryozoan host. It is shown that because of the way their individuals integrate into the colony-wide water-current system both species may gain from this association. L. nordgaardi also demonstrates a strong preference for living bryozoan colonies relatively to other possible substrate types. It is thus probable that entoprocts are involved in specific ecological interactions with bryozoans.