Changes in Condition Factor, Hepatosomatic and Gonadosomatic Index of Yellowfin Tuna (Thunnus albacares) in Captivity

The necessity for tuna products in the world community continues to increase, while production relies only on catching, thus causing overfishing. Therefore, breeding technology support farming is fundamental be developed. Yellowfin Indonesia has been successful cultivating broodstock. This paper discusses biometric data that changes during cultivation, such as condition factor, hepato and gonadosomatic indexes compared with wild captured. Data were collected from young broodstock captured fork length, body, liver gonad weight. factor (K) of cultivated (1.5-2.5) was higher (1.5-2.0). Similarly, value tuna’s hepatosomatic index (HSI) (0.63-1.14). In contrast, (GSI) yellowfin (>0.5) a circular concrete tank (0.4) but lower than floating net cage (>1.4). Maintenance GSI means number eggs produced relatively its natural counterpart. At same time, high FNC shows better results