Naslov
Food and nutritive value of gut contents of rudd (Scardinius erythrophtalmus L.) from Lake Vrana, Cres Island, Croatia

Autori
Tomec, Marija ; Teskeredžić, Zlatica ; Teskeredžić, Emin

Izvornik
Czech Journal of Animal Science (1212-1819) 48 (2003), 1; 28-34

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

Ključne riječi
oligotrophic lake; herbivory; cyprinid fish; food; biochemical composition

Sažetak
Gut contents rudd, Scardinius erythrophtalmus L. (age-group +3), which represents the dominant fish species in the oligotrophic karstic Vrana Lake, Cres Island, Croatia, were examined. Benthic micro- and macroalgae (Cyanobacteria, Dinophyceae, Bacillariophyceae, Chlorophyceae, Xanthophyceae) constituted the major food items of the species while macrophytes (mostly Potamogeton), zooplankton (Cladocera and Copepoda) and detritus were also recorded. Over the period of study, the diatomic Bacillariophyceae were observed in all samples, contributing up to 79% of dietary intake during February. Increased variation in gut contents, associated with elevated gut lipid and protein presence, was observed in May and June. During this period, total energetic or nutritive values were increased when compared to other months.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA