Author:
Krings Wencke,Marcé-Nogué Jordi,Gorb Stanislav N.
Abstract
AbstractThe radula, a chitinous membrane with embedded tooth rows, is the molluscan autapomorphy for feeding. The morphologies, arrangements and mechanical properties of teeth can vary between taxa, which is usually interpreted as adaptation to food. In previous studies, we proposed about trophic and other functional specialisations in taenioglossan radulae from species of African paludomid gastropods. These were based on the analysis of shape, material properties, force-resistance, and the mechanical behaviour of teeth, when interacting with an obstacle. The latter was previously simulated for one species (Spekia zonata) by the finite-element-analysis (FEA) and, for more species, observed in experiments. In the here presented work we test the previous hypotheses by applying the FEA on 3D modelled radulae, with incorporated material properties, from three additional paludomid species. These species forage either on algae attached to rocks (Lavigeria grandis), covering sand (Cleopatra johnstoni), or attached to plant surface and covering sand (Bridouxia grandidieriana). Since the analysed radulae vary greatly in their general size (e.g. width) and size of teeth between species, we additionally aimed at relating the simulated stress and strain distributions with the tooth sizes by altering the force/volume. For this purpose, we also included S. zonata again in the present study. Our FEA results show that smaller radulae are more affected by stress and strain than larger ones, when each tooth is loaded with the same force. However, the results are not fully in congruence with results from the previous breaking stress experiments, indicating that besides the parameter size, more mechanisms leading to reduced stress/strain must be present in radulae.
Publisher
Springer Science and Business Media LLC
Reference123 articles.
1. Ankel, W. E. Erwerb und Aufnahme der Nahrung bei den Gastropoden. Verh. Dtsch. Zool. Ges. Zool. Anz. 11, 223–295 (1938).
2. Eigenbrodt, H. Untersuchungen über die Funktion der Radula einiger Schnecken. Z. Morphol. Oekol. Tiere 37, 735–791 (1941).
3. Crampton, D. Functional anatomy of the buccal apparatus of Onchidoris bilamellata (Mollusca: Opisthobranchia). Trans. Zool. Soc. Lond. 34, 45–86. https://doi.org/10.1111/j.10963642.1977.tb00372.x (1977).
4. Wägele, H. Rasterelektronenmikroskopische Untersuchungen an Radulae einiger Nordseeschnecken (Gastropoda: Prosobranchia) mit Anmerkungen zur Funktionsmorphologie. Drosera 83, 68–78 (1983).
5. Hawkins, S. J. et al. A comparison of feeding mechanisms in microphagus, herbivorous, intertidal, Prosobranchs in relation to resource partitioning. J. Molluscan Stud. 55, 151–165 (1989).
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