engleski

Bluefin tuna (Thunnus thynnus L.) farming on the Croatian coast of the Adriatic Sea - present stage and future plan.

In Croatia, during the last five years, bluefin tuna (BFT) farming reached around 2500 metric tons per year of harvested fish. The industry consists of 6 commercial companies using 9 lease sites. It was based on fishing BFT by purse seine and growing them in the 50 m diameter cages for a few months up to a couple of years. The BFT are fed small pelagic fish by hand, six days per week, twice per day. Farm mortality is about 3 to 5% per year, while stress related mortality during adaptation period is around 2%. Daily feed consumption was in average around 5% of biomass, within the temperature range from 18° to 24°C. Because of some poorly planed and managed BFT operations had negatively impacted natural environment. The improvement of the environmental performances in BFT farming is of the highest importance for this industry in Croatia.

Bluefin tuna; purse seine; grow-out in cages; environmental impact

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