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Diet comparison of four ray species (Raja clavata, Raja brachyura, Raja montagui and Leucoraja naevus) caught along the Portuguese continental shelf

Published online by Cambridge University Press:  22 June 2006

Inês Farias
Affiliation:
Departamento de Recursos Marinhos, INIAP-IPIMAR, Av. Brasília, 1449-006 Lisboa, Portugal
Ivone Figueiredo
Affiliation:
Departamento de Recursos Marinhos, INIAP-IPIMAR, Av. Brasília, 1449-006 Lisboa, Portugal
Teresa Moura
Affiliation:
Departamento de Recursos Marinhos, INIAP-IPIMAR, Av. Brasília, 1449-006 Lisboa, Portugal
Leonel Serrano Gordo
Affiliation:
Departamento de Biologia Animal and Instituto de Oceanografia, Faculdade de Ciências de Lisboa, Bloco C2, Campo Grande, 1749-016 Lisboa, Portugal
Ana Neves
Affiliation:
Departamento de Biologia Animal and Instituto de Oceanografia, Faculdade de Ciências de Lisboa, Bloco C2, Campo Grande, 1749-016 Lisboa, Portugal
Bárbara Serra-Pereira
Affiliation:
Departamento de Biologia Animal and Instituto de Oceanografia, Faculdade de Ciências de Lisboa, Bloco C2, Campo Grande, 1749-016 Lisboa, Portugal
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Abstract

Data on the diet of species are important for understanding ecosystem dynamics and are fundamental for the implementation of recent approaches in stock assessment and consequently for the establishment of more ecological management measures. In mainland Portugal, as in most European countries, skates and rays represent an important proportion of commercial landings. The four main species landed are Raja clavata and Raja brachyura, followed by Leucoraja naevus and Raja montagui. This paper analyses their diets based on the examination of stomach contents. Food items were identified to the lowest identifiable taxon and were further assembled into major taxonomic groups designated as prey. Intra- and interspecific comparisons were made according to size and sex. All four species had generalized diets with differences in prey preference among them. Decapods and bony fish were the most frequent prey. Furthermore, an ontogenetic dietary shift was evident in all species at around 45−55 cm total length. Both intra- and interspecific differences observed seem to be related to size and morphological characteristics of the species, as well as type of dentition. These variations allow different species, as well as small and large specimens from the same species, to exploit a larger diversity of habitats.

Type
Research Article
Copyright
© EDP Sciences, IFREMER, IRD, 2006

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References

Ajayi, T.O., 1982, Food and feeding habits of Raja species (Batoidei) in Carmarthen Bay, Bristol Channel. J. Mar. Biol. Assoc. UK 62, 215-223. CrossRef
Assis C., 1992, A Ecologia Alimentar dos Peixes: Metodologia empregue no seu estudo. Trabalho de síntese elaborado no âmbito das “Provas de Aptidão Pedagógica e Capacidade Científica”, Departamento de Zoologia e Antropologia, Faculdade de Ciências de Lisboa.
Bauchot M.-L., 1987, Raies et autres batoïdes. In: Fischer W., Bauchot M.-L., Schneider M. (Eds.) Fiches FAO d'identification pour les besoins de la pêche (rev. 1), Méditerranée et mer Noire, Zone de pêche 37, Vol. II, Rome, Commission des Communautés Européennes and FAO, pp. 845-886.
Brunnschweiler, J.M., Andrews, P.L.R., Southall, E.J., Pickering, M., Sims, D.W., 2005, Rapid voluntary stomach eversion in a free-living shark. J. Mar. Biol. Assoc. UK 85, 1141-1144. CrossRef
Cortés, E., 1997, A critical review of methods of studying fish feeding based on analysis of stomach contents: application to elasmobranch fishes. Can. J. Fish. Aquat. Sci. 54, 726-738. CrossRef
Cunha, P.L., Calvário, J.R., Marques, J.C., , P., 1987, Estudio comparativo dos regimes alimentares de Raja brachyura Lafont, 1873, Raja clavata Linné, 1758, Raja montagui Fowler, 1910 e Raja naevus Müller e Henle, 1814 da costa portuguesa. Cuad. Marisq. Publ. Téc. 11, 275-289.
Daan N., Johnson B., Larsen J.R., Sparholt H., 1993, Analysis of the ray (Raja spec.) samples collected during the 1991 International Stomach Sampling Project. ICES C.M. 1993/G:15.
Du Buit M.H., 1978-1979, Remarques sur la denture des raies et sur leur alimentation. Vie Milieu 28-29, 165-174.
Ebert, D.A., Cowley, P.D., Compagno, L.J.V., 1991, A preliminary investigation of the feeding ecology of skates (Batoidea: Rajidae) off the West coast of Southern Africa. S. Afr. J. Mar. Sci. 10, 71-81. CrossRef
Ebeling E., 1988, A brief survey of the feeding preferences of Raja clavata in Red Wharf Bay in the Irish Sea. ICES C.M. 1988/G:58, 10.
Ellis, J.R., Pawson, M.G., Shackley, S.E., 1996, The comparative feeding ecology of six species of shark and four species of ray (Elasmobranchii) in the north-east Atlantic. J. Mar. Biol. Assoc. UK 76, 89-106. CrossRef
Gomes T.M., Sola E., Grós M.P., Menezes G., Pinho M.R., 1998, Trophic relationships and feeding habists of demersal fishes from the Azores: importance to multispecies assessment. ICES CM 1998/O:7.
Herrán R.A., 1988, Analisis de contenidos estomacales en peces. Revision bibliografica de los objectivos y la metodologia. Inf. Téc. Inst. Esp. Oceanogr. 63.
Holden, M.J., Tucker, R.N., 1974, The food of Raja clavata Linnaeus 1758, Raja montagui Fowler 1910, Raja naevus Muller and Henle 1841, and Raja brachyura Lafont 1873 in British waters. J. Cons. Int. Explor. Mer 35, 189-193. CrossRef
Kalmijn, A.J., 1966, Electro-perception in sharks and rays. Nature 212, 1232-1233. CrossRef
Lilly G.R., Rice J.C., 1983, Food of Atlantic cod (Gadus morhua) on the Northern Grand Bank in Spring. Fifth Annual Meeting, Sept. 1983. NAFO SCR Doc. 83/IX/87.
Machado, P.B., Gordo, L.S., Figueiredo, I., 2004, Skate and ray species composition in mainland Portugal from the commercial landings. Aquat. Living Resour. 17, 231-234. CrossRef
Marques V.M., Ré P., 1978, Régime alimentaire de quelques Rajidae des côtes portugaises. Arquivos do Museu Bocage VI (34), 8.
Ross, S.T., 1978, Trophic ontogeny of the leopard searobin Prionotus scitulus (Pisces: Triglidae). Fish. Bull. 76, 225-234.
Scharf, F.S., Juanes, F., Rountree, R.A., 2000, Predator size-prey size relationships of marine fish predators: interspecific variation and effects of ontogeny and body size on trophic-niche breadth. Mar. Ecol. Prog. Ser. 208, 229-248. CrossRef
Sims, D.W., Andrews, P.L.R., Young, J.Z., 2000, Stomach rinsing in rays. Nature 404, 566. CrossRef
Stehmann, M.F.W., 2002, Proposal of a maturity stages scale for oviparous and viviparous cartilaginous fishes (Pisces, Chondrichthyes). Arch. Fish. Mar. Res. 50, 23-48.
Stergiou, K.I., Karpouzi, V.S., 2002, Feeding habits and trophic levels of Mediterranean fish. Rev. Fish Biol. Fish. 11, 217-254. CrossRef
Steven, G.A., 1930, Bottom fauna and food of fishes. J. Mar. Biol. Assoc. UK 16, 677-700. CrossRef
Walker P.A., 1999, Fleeting Images: Dynamics of North Sea Ray Populations. PhD Thesis, University of Amsterdam.
Wallace, R.K., Jr., 1981, An assessment of diet-overlap indexes. Trans. Am. Fish. Soc. 110, 72-76. 2.0.CO;2>CrossRef
Wootton R.J., 1990, Ecology of Teleost Fishes, New York, Chapman and Hall.
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