Naslov
Diet of striped sea bream Lithognathus mormyrus (Osteichthyes : Sparidae) from eastern central Adriatic Sea

Autori
Šantić, Mate ; Paladin, Antonela ; Elez, Gordana

Izvornik
Cybium (0399-0974) 34 (2010), 4; 345-352

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Sparidae - Lithognathus mormyrus – MED – Adriatic Sea - diet

Sažetak
The diet of striped sea bream, Lithognathus mormyrus (Linnaeus, 1758), from the central Adriatic Sea, was investigated with respect to fish size and seasons. Stomach contents of 524 specimens, total length (TL) of 12.8 - 31.7 cm, collected by trammel bottom nets and gill nets from January to December 2008 were analysed. The overall percentage of empty stomachs (17.7%) evidenced a variation with a season, maximum during the winter (30.0%) and a minimum during the summer (8.3%). The prey species identified in the stomachs belong to eight major groups: Gastropoda, Bivalvia, Polychaeta, Decapoda, Amphipoda, Copepoda, Echinodermata and Teleostei. Bivalves were the most important ingested prey in all seasons as well as in the length class from 16 to 26 cm TL. Small prey like amphipods and copepods constituted the main prey in the diet of fish with less than 16 cm TL. Conversely, the proportion of decapods and teleosts in the stomach contents increased in largest size class (> 26 cm TL). Bivalves, Dosinia lupinus (%IRI = 6.8) and Telinella pulchella (%IRI = 3.1) and a decapod Liocarcinus depurator (%IRI = 2.6) were the most frequent prey. Diet composition showed little seasonal variation ; bivalves were the most important prey in all seasons especially during the winter. The lowest feeding frequency recorded in the winter could be related to lower sea temperature. Striped sea bream is an active seeking bottom feeder whose diet consists of diverse benthic groups, with wide range of size and morphology.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

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