A COMPARISON OF FEEDING MECHANISMS IN MICROPHAGOUS, HERBIVOROUS, INTERTIDAL, PROSOBRANCHS IN RELATION TO RESOURCE PARTITIONING |
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| Authors: | HAWKINS, S. J. WATSON, D. C. HILL, A. S. HARDING, S. P. KYRIAKIDES, M. A. HUTCHINSON, S. NORTON, T. A. |
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| Affiliation: | *Port Erin Marine Laboratory, University of Liverpool Isle of Man; !["{dagger}"]("/math/dagger.gif") Department of Botany, University of Glasgow; !["{ddagger}"]("/math/Dagger.gif") Department of Environmental Biology, University of Manchester; and !["§"]("/math/sect.gif") Department of Physiological Sciences, University of Manchester |
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| Abstract: | Several microphagous grazers co-exist on British rocky shores.The nature of the microbial film which is their prime food sourceis outlined. The radula morphology, hardness, and feeding mechanismsof rhipidoglossan trochids (Gibbula, Monodonta) taenioglossanLittorina, and docoglossan Patella have been compared. Docoglossanscan penetrate hard substrates deeply, taenioglossans can onlypenetrate softer substrates, and rhipidoglossans appear to primarilybrush the surface. A preliminary study found some differencesin diet. Whether feeding mechanisms allow partitioning of themicrofloral film and whether this allows continuing co-existenceof intertidal grazers is discussed. |
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