Factors Affecting Atlantic Bluefin Tuna (Thunnus Thynnus Linnaeus,1758) Growth and Feed Conversion Rates Under Fattening Conditions
Özet
This comprehensive academic study by Kutsal Gamsız and Ali Yıldırım Korkut investigates the key factors determining the growth performance and Feed Conversion Rates (FCR) of Atlantic Bluefin Tuna (Thunnus thynnus) under commercial fattening conditions within capture-based aquaculture (CBA). As global aquaculture expands rapidly to satisfy increasing human food consumption, CBA plays an indispensable role in rearing high-value marine species. Across the Mediterranean Basin, bluefin tuna fattening operations primarily target lucrative markets like Japanese sushi and sashimi by significantly enhancing the muscle fat content lost during spawning migrations. Synthesizing international research and empirical data, the authors systematically analyze the impact of critical variables, including initial fish weight, age, seawater temperature, daily feeding ratios, and the nutritional quality of forage baitfish. The findings demonstrate that smaller, younger bluefin tuna exhibit substantially higher relative growth rates and superior feed conversion efficiency compared to mature, larger individuals. Addressing key future perspectives, the authors highlight the urgent necessity of industry-wide collaboration to pioneer formulated artificial diets. Replacing wild forage fish with artificial diets aims to optimize conversion ratios, lower operational costs, and promote long-term environmental and economic sustainability in global tuna farming.
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