Skoči na glavni sadržaj

Izvorni znanstveni članak

https://doi.org/10.17818/NM/2023/SI2

Feeding habits of stargazer (Uranoscopus scaber Linnaeus, 1758) in the southern Adriatic Sea (Croatia)

Jadranka Sulić Šprem ; Dubrovnik Natural History Museum, Dubrovnik, Croatia
Tatjana Dobroslavić ; University of Dubrovnik, Department of Applied Ecology, Dubrovnik, Croatia
Vlasta Bartulović orcid id orcid.org/0000-0001-7450-3741 ; University of Dubrovnik, Department of Applied Ecology, Dubrovnik, Croatia
Valter Kožul ; University of Dubrovnikm Institute for Marine and Coastal Researchm Dubrovnik, Croatia


Puni tekst: engleski pdf 359 Kb

str. 147-152

preuzimanja: 106

citiraj


Sažetak

The feeding habits of the stargazer Uranoscopus scaber Linnaeus, 1758 were analysed using 360 stomachs of specimens collected in southern Adriatic Sea between October 2011 and September 2012. The total body length of the specimens ranged from 9.7 to 32.1 cm (18.89 ± 3.34 cm) and weight from 11.7 to 618.7 g (112.79 ± 63.17 g). In the sampled population there were 213 females (59.17%) and 147 males (40.83%). Stargazer is carnivorous fish and its diet in Adriatic Sea was composed of teleost fish, cephalopods and crustaceans. According to numerical abundance fish predominated followed by crustaceans, while according to the gravimetric composition fish predominated followed by cephalopods. Teleost fish were dominant prey in all seasons, and the principal prey were hake Merluccius merluccius and argentine Argentina sphyraena. Argentine was primary food in summer (IRI = 61.63), while hake occur in other seasons. In relation to the total body length teleost fish dominated in diet of stargazer whose total body length was < 25 cm. In size group I and II (TL < 20 cm) A. sphyraena was the main food, while M. merluccius was dominant prey in the size group III (TL = 20 – 25 cm). Vacuity index in the sampled population was relatively low (%V = 11.11%). During seasons the percentage of empty stomachs varied significantly with the highest value in winter (%V = 15.55%) and the lowest in spring (%V = 7.78%). In relation to the total body length the highest vacuity index was recorded for size group II (%V = 5.83) and the lowest for group VI (%V = 0).

Ključne riječi

fishes; Uranoscopus scaber; diet; Adriatic Sea

Hrčak ID:

305107

URI

https://hrcak.srce.hr/305107

Datum izdavanja:

30.6.2023.

Posjeta: 246 *