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|Título:||Feeding habits of the lizardfish Synodus saurus (Linnaeus, 1758) (Actinopterygii: Synodontidae), from the Azores|
|Autor:||Barreiros, João P.|
Soares, Marta S. C.
|Citação:||Barreiros, J.P.; Sousa, L.; Soares, M.S.C. (2003). "Feeding habits of the lizardfish Synodus saurus (Linnaeus, 1758) (Actinopterygii: Synodontidae), from the Azores". «aqua – Journal of Ichthyology and Aquatic Biology», 7(1): 29-38. ISSN 0945-9871.|
|Resumo:||The feeding habits of the lizardfish Synodus saurus were study in the Azores archipelago, north-eastern Atlantic. Factors examined were diet composition, prey importance, season, fish size, feeding strategy and prey orientation in the oesophagus. The stomach contents of 308 specimens were collected and analyzed between March and November 2000. Synodus saurus is common in Azorean water. Though it prefers small gregarious pelagic fish, it also feeds on epibenthic and benthic prey. We found the following prey in its diet: 9 families of teleostean fishes (Carangidae, clupeidae, Cynoglossidae, Gobiidae, Labridae, Myctophidae, Spaidae, Spyraenidae and Synodontidae), two families of crustaceans (Cymothoidae and Scyllaridae) and one of cephalopods (Loliginidae). The European pilchard, Sardina pilchardus was the commonest prey. The diet of the lizardfish varies with the season, showing the greatest diversity (given by the Shannon-Wiener index) in October. There is a significant correlation with the sea temperature. The size of the predator is not correlated to the size of its prey. However, we observed a positive correlation between the size o the positive correlation between the size of the predator and the quantity of food in its stomach. The orientation of the prey in the oesophagus may partly depend on the predator’s size. However, analysis of the stomach contents provided no information on the selection of prey.|
|Descrição:||Copyright © 2003 aqua, International Journal of Ichthyology.|
|Aparece nas colecções:||DCA - Artigos em Revistas Internacionais / Articles in International Journals|
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