Naslov
Low impact of marine fish farming on sediment and meiofauna in Limski channel (Northern Adriatic, Croatia)

Autori
Najdek, Mirjana ; Travizi, Ana ; Bogner, Danijela ; Blažina, Maria

Izvornik
Fresenius Environmental Bulletin (1018-4619) 16 (2007), 7; 784-791

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

Ključne riječi
aquaculture; fish-farm; sediment quality; meiofauna; sustainability; Northern Adriatic

Sažetak
Field study analyzed the impact of fish cage farming (sea bass, Dicentrarchus labrax, and sea bream, Sparus aurata) on sediment and meiofauna in Limski kanal (northern Adriatic, Croatia). In the aquaculture area sediment was characterized by elevated organic carbon (farms: 1, 02-3, 39% ; controls: 0, 26-1, 73%), polyunsaturated fatty acids (farms: 0, 1-26, 4% ; controls: 0-9, 51%) and lipid concentration (farms: 0, 39-5, 24 mg/g d.w. ; controls: 0, 07-1, 5 mg/g d.w.). Total meiofauna density was reduced (farms: 323-1065 ind. 10cm-2 ; controls: 1506-1631 ind. 10 cm-2), contribution of nematodes increased (farms: 86-92% ; controls: 69-76%), contribution of copepods (farms: 4-10% ; controls: 17-21%) and abundances of Turbellaria (farms: 1 ; controls: 11-24 ind.10cm-2), Kynorhyncha (farms: 2-4 ; controls: 11-44 ind.10cm-2), Ostracoda (farms: <1 ; controls: 5-23 ind. 10cm-2) and Amphipoda (farms: 1 ; controls: 5-12 ind.10cm-2) decreased. The results suggested a localized effect of fish farming waste with no serious oxygen disturbances, confined to area directly underneath the cages. Although sedimentological characteristics of Limski kanal favour accumulation and have pronounced memory for highly degradable organic matter the impact of the fish farming turned out to be negligible. These results suggest that sea bass and sea bream farming in the investigated system is eco-sustainable as it does not significantly alter the semi-enclosed marine ecosystem.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Biologija

POVEZANOST RADA