Abstract
Experiments were carried out using established methods to measure feeding current velocity in six species of marine Bryozoa collected in 1982 and 1983 around low-tide mark at Port St. Mary, Isle of Man (Flustrellidra hispida, Alcyonidium gelatinosum, A. hirsutum, Electra pilosa, Membranipora membranacea and Bowerbankia gracilis feeding on Tetraselmis suecica). It was found that there was a positive correlation between feeding current velocity and the concentration of food (phytoplankton) in the environment. It was also found that, at a fixed particle concentration, feeding current velocity was strongly correlated with lophophore height and (less strongly) with tentacle number. The competitive and evolutionary implications of these relationships are considered. It is tentatively suggested that interspecific competition for food may be of some significance in marine Bryozoa and that the removal of food supplies to competing colonies may play a role in colony overgrowth and competition for space.
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Literature cited
Atkins, D.: The ciliary feeding mechanisms of the entoproct Polyzoa and a comparison with that of the ectoproct Polyzoa. Q. Jl microsc. Sci. 75, 393–423 (1932)
Barnes, R. S. K. and R. N. Hughes: An introduction to marine ecology, 339 pp. Oxford: Blackwell 1982
Best, M. A.: Some aspects of the ecology and physiology of feeding in marine Bryozoa, XXIII+471 pp. Unpublished thesis, University of Liverpool, Port Erin, Isle of Man 1985
Best, M. A. and J. P. Thorpe: Effects of particle concentration on clearance rate and feeding current velocity in the marine bryozoan Flustrellidra hispida. Mar. Biol. 77, 85–92 (1983)
Branch, G. M.: Competition between marine organisms: ecological and evolutionary implications. Oceanogr. mar. Biol. a. Rev. 22, 429–593 (1984)
Bullivant, J. S.: The method of feeding in lophophorates (Bryozoa, Phoronida, Brachiopoda). N. Z. Jl mar. Freshwat. Res. 2, 135–146 (1968a)
Bullivant, J. S.: The rate of feeding of the bryozoan Zoobotryon verticillatum. N.Z. Jl mar. Freshwat. Res. 2, 111–134 (1968b)
Buss, L. W.: Habitat selection, directional growth and spatial refuges: why colonial animals have more hiding places. In: Biology and systematics of colonial organisms, pp 459–497. Ed. by G. P. Larwood and B. R. Rosen. London: Academic Press 1979a
Buss, L. W.: Bryozoan overgrowth interactions — the interdependance of competition for food and space. Nature, Lond. 281 467–475 (1979b)
Buss, L. W.: Competitive intransity and size-frequency distribution of interacting populations. Proc. natn. Acad. Sci. U.S.A. 77, 5355–5359 (1980)
Buss, L. W.: Mechanism of competition between Onychocella alula (Hastings) and Antropora tincta (Hastings) on an eastern Pacific rocky shore. In: Recent and fossil bryozoa, pp 39–49. Ed. by G. P. Larwood and C. Nielsen. Fredensborg, Denmark: Olsen & Olsen 1981
Buss, L. W. and J. B. C. Jackson: competitive networks: nontransitive competitive relationships in cryptic coral reef environments. Am. Nat. 113, 223–234 (1979)
Buss, L. W. and J. B. C. Jackson: Planktonic food availability and suspension-feed abundance: evidence of in situ depletion. J. exp. mar. Biol. Ecol. 49, 151–161 (1981)
Connell, J. H.: The influence of interspecific competition and other factors on the distribution of the barnacle Chthamalus stellatus. Ecology 42, 710–723 (1961)
Crisp, D. J. and G. B. Williams: Effects of extracts from fucoids in promoting settlement of epiphytic Polyzoa. Nature, Lond. 188, 1206–1207 (1960)
Dayton, P. K.: Competition, disturbance and community organization: the provision and subsequent utilization of space in a rocky intertidal community. Ecol. Monogr. 41, 351–389 (1971)
DeBurgh, M. E. and P. V. Fankboner: A nutritional association between the bull kelp Nereocystis luetkeana and its epizooic bryozoan Membranipora membranacea. Oikos 31, 69–72 (1978)
Gilmour, T.: Ciliation and function of food collecting and waste rejecting organs of lophophorates. Can. J. Zool. 56, 2142–2155 (1978)
Hayward, P. J.: Ctenostome bryozoans, 169 pp. London: Linnean Society 1985
Hayward, P. J. and P. H. Harvey: The distribution of settled larvae of the bryozoans Alcyonidium hirsutum (Fleming) and Alcyonidium polyoum (Hassall) on Fucus serratus L. J. mar. biol. Ass. U.K. 54, 665–676 (1974a)
Hayward, P. J. and P. H. Harvey: Growth and mortality of the bryozoan Alcyonidium hirsutum (Fleming) on Fucus serratus L. J. mar. biol. Ass. U.K. 54, 677–684 (1974b)
Jackson, J. B. C.: Competition on marine hard substrata: the adaptive significance of solitary and colonial strategies. Am. Nat. 111, 743–768 (1977)
Jackson, J. B. C.: Morphological strategies of sessile animals. In: Biology and systematics of colonial organisms, pp 499–555. Ed. by G. P. Larwood and B. R. Rosen. London: Academic Press 1979a
Jackson, J. B. C.: Overgrowth competition between encrusting cheilostome ectoprocts in a Jamaican cryptic reef community. J. Anim. Ecol. 48, 805–824 (1979b)
Jackson, J. B. C.: Biological determinants of present and past sessile animal distributions. In: Biotic interactions in recent and fossil benthic communities, pp 39–120. Ed. by M. J. S. Tsvesz and P. L. McCall. New York: Plenum Press 1983
Jackson, J. B. C.: Ecology of cryptic coral reef communities. III. Abundance and aggregation of encrusting organisms with particular reference to cheilostome Bryozoa. J. exp. mar. Biol. Ecol. 75, 37–57 (1984)
Jackson, J. B. C. and J. E. Winston: Ecology of cryptic reef communities. I. Distribution and abundance of major groups of encrusting organisms. J. exp. mar. biol. Ecol. 57, 135–147 (1982)
Knight-Jones, E. W. and J. Moyse: Interspecific competition in sedentary marine animals. Symp. Soc. exp. Biol. 15, 72–95 (1961)
Lidgard, S.: Water flow, feeding and colony form in an encrusting cheilostome. In: Recent and fossil Bryozoa, pp 134–142. Ed. by G. P. Larwood and C. Nielsen. Fredensborg, Denmark: Olsen & Olsen 1981
Menon, N. R.: Clearance rates of food suspension and food passage rates as a function of temperature in two North Sea bryozoans. Mar. Biol. 24, 65–67 (1974)
O'Connor, R. J., P. J. S. Boaden and R. Seed: Niche breadth in Bryozoa as a test of competition theory. Nature, Lond. 256, 307–309 (1975)
Paine, R. T.: Intertidal community structure: experimental studies on the relationship between a dominant competitor and its principal predator. Oecologia (Berl.) 15, 93–120 (1974)
Palumbi, S. R. and J. B. C. Jackson: Ecology of cryptic coral reef communities. II. Recovery from small disturbance events by encrusting Bryozoa: the influence of “host” species and lesion size. J. exp. mar. Biol. Ecol. 64, 103–115 (1982)
Ryland, J. S.: Experiments on the selection of algal substrates by polyzoan larvae. J. exp. Biol. 36, 613–631 (1959)
Ryland, J. S.: Bryozoans, 175 pp. London: Hutchinson 1970
Ryland, J. S.: Observations on some epibionts of gulfweed, Sargassum natans (L.) Meyen. J. exp. mar. Biol. Ecol. 14, 17–25 (1974)
Ryland, J. S.: Parameters of the lophophore in relation to population structure in a bryozoan community. Proc. 9th Eur. mar. Biol. symp., 363–393 (1975). (Ed. by H. Barnes. Aberdeen. Aberdeen University Press)
Ryland, J. S.: Physiology and ecology of marine bryozoans. Adv. mar. Biol. 14, 285–443 (1976)
Stebbing, A. R. D.: Competition for space between the epiphytes of Fucus serratus L. J. mar. biol. Ass. U.K. 53, 247–261 (1973a)
Stebbing, A. R. D.: Observations on colony overgrowth and spatial competition. In: Living and fossil Bryozoa, pp 173–183. Ed. by G. P. Larwood. London: Academic Press 1973b
Strathmann, R. R.: The feeding behaviour of planktotrophic echinoderm larvae: mechanisms, regulation and rates of suspension feeding. J. exp. mar. Biol. Ecol. 6, 109–160 (1971)
Strathmann, R. (R.): Function of lateral cilia in suspension feeding of lophophorates (Brachiopoda, Phoronida, Ectoprocta). Mar. Biol. 23, 129–136 (1973)
Strathmann, R. R.: Comments on Dr. Gilmour's views on feeding by hemichordates and lophophorates. Can. J. Zool. 60, 3466–3468 (1982a)
Strathmann, R. R.: Cinefilms of particle capture by an induced local change of beat in the lateral cilia of a bryozoan. J. exp. mar. Biol. Ecol. 62, 225–236 (1982b)
Thorpe, J. P., D. R. K. Clarke and M. A. Best: Natural variation in tentacle number in marine bryozoans and the possible effects of intraspecific and interspecific competition for food. In: Bryozoa: Ordovician to Recent, pp 319–328. Ed. by C. Nielsen and G. P. Larwood. Fredensborg, Denmark: Olsen & Olsen 1986
Thorpe, J. P. and J. E. Winston: On the identity of Alcyonidium gelatinosum (Linnaeus, 1761) (Bryozoa, Ctenostomata). J. nat. Hist. 18, 853–860 (1984)
Thorpe, J. P. and J. E. Winston: On the identity of Alcyonidium diaphanum Lamouroux 1813 (Bryozoa, Ctenostomata) J. nat. Hist. 20, 845–848 (1986)
Winston, J. E.: Feeding in marine bryozoans. In: Biology of bryozoans, pp 233–272. Ed. by R. M. Woolacott and R. L. Zimmer. New York: Academic Press 1977
Winston, J. E.: Polypide morphology and feeding behaviour in marine ectoprocts. Bull. mar. Sci. 28, 1–31 (1978)
Winston, J. E.: Current-related morphology and behaviour in some Pacific coast bryzozoans. In: Advances in bryozoology, pp 247–268. Ed. by G. P. Larwood and M. B. Abbott. London: Academic Press 1979
Winston, J. E. and J. B. C. Jackson: Life histories of cryptic reef bryozoans. In: Recent and fossil Bryozoa, pp 317–318. Ed. by G. P. Larwood and C. Nielsen. Fredensborg, Denmark: Olsen & Olsen 1981
Winston, J. E. and J. B. C. Jackson: Ecology of cryptic coral reef communities. IV. Community development and life histories of encrusting cheilostome Bryozoa. J. exp. mar. Biol. Ecol. 76, 1–21 (1984)
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Communicated by J. Mauchline, Oban
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Best, M.A., Thorpe, J.P. Effects of food particle concentration on feeding current velocity in sex species of marine Bryozoa. Mar. Biol. 93, 255–262 (1986). https://doi.org/10.1007/BF00508263
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DOI: https://doi.org/10.1007/BF00508263