Effect of different diet pellet sizes on the growth of juvenile cobia (Rachycentron canadum)

ABSTRACT It is known that there a close relationship between pellet feed size and fish growth. However, the magnitude of this regarding an animals’ efficiency not yet clear. Therefore, present study conducted at Virginia Tech - Seafood Agricultural Research Extension Center (USA), investigated effects three different sizes, 1.7mm (EP.1), 2.3 mm (EP.2) 3.1 (EP.3), on growth Cobia (Rachycentron canadum) in recirculating aquaculture system (RAS). Animals were farmed for 55 days 77.5-liter tanks (6 with initial density 3.78 g L⁻¹) weighing approximately 41.83±1.24g. The results showed during 8-week culture period, no significant differences animal’s final weight over sizes (EP.1 952.5±40.7g; EP.2 1014.5±26.6g; EP.3 1030.0±54.8g). biomass gain 704.0±34+.3g; 763.0±27.8g; -776.5±51.9g). Consequently, also found conversion factors.