Food habits of the rough rayRaja radula(Chondrichthyes: Rajidae) from the Gulf of Gabès (central Mediterranean Sea)

Autor:	S. Marouani, A. Bouaïn, M. N. Bradai, H. Kadri, B. Saïdi
Rok vydání:	2013
Předmět:	Fishery Mediterranean sea biology Ontogeny Food habits Animal Science and Zoology biology.organism_classification Chondrichthyes Crustacean Raja radula
Zdroj:	Italian Journal of Zoology. 80:52-59
ISSN:	1748-5851 1125-0003
DOI:	10.1080/11250003.2012.697925
Popis:	The food habits of rough ray Raja radula were investigated, with respect to sex, size and season, based on stomach content analyses of specimens collected from commercial fisheries, monthly during 2007 in the Gulf of Gabes (Central Mediterranean Sea). Of 950 stomachs examined, 183 were empty (19.26%). The overall diet of R. radula mainly consisted of crustacean decapods, teleosts and molluscs. Polycheates, sipunculids and echinoderms were minor dietary components. No differences were observed in the major preys consumed between the sexes, but ontogenetic and seasonal changes were found. The dietary trend with size shifted from crustaceans to teleosts. The consumptions of minor preys were independent from both size and season. Quantitative analysis and graphical methods indicated the rough ray to be a specialized feeder.
Databáze:	OpenAIRE
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