Naslov
Rearing of small bluefin tunas (Thunnus thynnus L.) in the Adriatic Sea - preliminary study.

Autori
Katavić, Ivan ; Tičina, Vjekoslav ; Franičević, Vlasta

Izvornik
Cashiers Options Mediterraneennes (1022-1379) 60 (2003); 95-99

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

Ključne riječi
fish farming; bluefin tuna; growth-out cages; tagging; feeding; Adriatic Sea

Sažetak
The objective of this paper was to describe cage rearing of small bluefin tuna (Thunnus thynnus L.) in the Adriatic Sea. Approximately 6200 fish (Wavg.=11.2 kg), captured by purse seine were stocked in a 50m diameter cage. After two weeks of acclimatisation, tunas were fed raw, defrosted small pelagic fish, dominated by herrings with 87.9%. Feeding experiment was initiated July 9 and monitored up to October 31st 1999. Feed was hand distributed six days/week, twice a day. Tunas were daily fed with the quantity of food equal to 5.1% of their biomass within the temperature range from 18° to 24°C and the oxygen saturation was above 90%. The highest mortality rate (2.1%) was noticed during the first month of adaptation, while in the following months it was significantly lower (0.6%). Some specimens were measured and tagged, with aim to estimate their daily growth rate over 540 days rearing period.

Izvorni jezik
Engleski

Znanstvena područja
Biotehnologija

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