Elysia timida (Risso, 1818) (Gastropoda, Opisthobranchia): relationship and feeding deterrence to a potential predator on the south-western Mediterranean coast

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Título: Elysia timida (Risso, 1818) (Gastropoda, Opisthobranchia): relationship and feeding deterrence to a potential predator on the south-western Mediterranean coast
Autor/es: Gimenez-Casalduero, Francisca | Muniain, Claudia | García Charton, José Antonio
Grupo/s de investigación o GITE: Biología Marina
Centro, Departamento o Servicio: Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada | Museo Argentino de Ciencias Naturales ‘‘Bernardino Rivadavia’’ | Laboratoire d’Ichtyécologie Tropicale et Méditerranéenne
Palabras clave: Elysia timida | Feeding deterrent | Colour pattern | Fish
Área/s de conocimiento: Zoología | Biología Marina | Ecología
Fecha de creación: 2001
Fecha de publicación: 10-sep-2002
Editor: Springer Berlin / Heidelberg
Cita bibliográfica: GIMÉNEZ CASALDUERO, Francisca; MUNIAIN, Claudia; GARCÍA CHARTON, José Antonio. "Elysia timida (Risso, 1818) (Gastropoda, Opisthobranchia): relationship and feeding deterrence to a potential predator on the south-western Mediterranean coast". Marine Biology. Vol. 141, No. 6 (Dec. 2002). ISSN 0025-3162, pp. 1051-1057
Resumen: The relationship between the sacoglossan Elysia timida and the ornate wrasse Thalassoma pavo was studied in two laboratory experiments using artificial models. A feeding-preference experiment was conducted to determine whether mollusc extract deterred feeding by T. pavo, by using a ‘‘realistic’’ mollusc model(imitating the colour pattern of E. timida) coated with mollusc extract, and a reference model (without imitation or extract), and fishes collected from two locations. It was observed that fish approached, attacked and ate more reference models than mollusc models. A second feeding-preference experiment was designed with four different coloured models: ‘‘realistic’’ (W), green (G), red (R) and chequered (S) pattern. Both fish populations clearly rejected the S model, and differed in their colour preferences. Although both populations seemed to prefer the R and G models equally, the W model was clearly rejected by the fish that coexist with the mollusc at one site (Mazarrón), but was not rejected by the other population of fish which does not coexist with it (Cabo de Palos). Mazarrón fishes would identify the W model with the presence of a toxic compound during their coexistence, and therefore avoid attacking conspicuously coloured E. timida models as a response to their visual signals. Therefore, it was concluded that extract of E. timida is a deterrent for T. pavo, and its effect is sufficiently noxious that the fish tend to avoid it, so that the ability of the fishes to learn to recognise colours and identify certain colour patterns associated with obnoxious prey provides the molluscs the opportunity to survive by exhibiting a conspicuous coloration.
Patrocinador/es: This research was supported by the research grant PN92 (Spanish National Programme of Researcher Training, Education and Science) to F.G.C., research grant INV01–56 from the Conselleria de Investigació (Generalitat Valenciana) in the University of Alicante to C.M., and a postdoctoral grant PD-01452/CV/00 (Fundación Séneca, Centro de Coordinación de la Investigación de la Comunidad Autónoma de la Región de Murcia) to J.A.G.C.
URI: http://hdl.handle.net/10045/7323
ISSN: 0025-3162 (Print) | 1432-1793 (Online)
DOI: 10.1007/s00227-002-0909-3
Idioma: eng
Tipo: info:eu-repo/semantics/article
Derechos: The original publication is available at www.springerlink.com
Revisión científica: si
Versión del editor: http://dx.doi.org/10.1007/s00227-002-0909-3
Aparece en las colecciones:INV - BM - Artículos Científicos / Scientific Papers

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