Feed delivery is an essential challenge in aquaculture, ultimately impacting the long-term production yield of any cultured organism. In fish, the long-term benefits of optimal early-life feeding include greater survival, growth, and fecundity. Efficient feed delivery requires that fish feeding demands be reliably satisfied by optimizing feed timing and availability. New automated technologies provide remote capabilities through mobile devices, real-time monitoring, and online management of feeding schedules. These innovations in feeding technologies have the potential to increase efficiencies in fish larviculture and nursery practices. This report details the observations of employing remote-controlled automated feeders for juvenile fish production.
DXOPHIEX (DXO, Amazon Inc.) automated fish feeders were used for six months in nursery recirculating systems at the Aquaculture Production Technologies Laboratory, Kentucky State University, Frankfort, KY (Figure 1). This allowed for remote-controlled capabilities with Wi-Fi connection through mobile device application. Feed storage capacity was 200 mL, and dispense rates were controlled by an adjustable release tab on the rotating component. Dispensed feed amounts were calculated based on starting feed weight, 15 rotation counts, three release settings (light, medium, and heavy), and three feed sizes (0.3, 0.8, and 1.5-mm).
DXO automated feeders provided a predominantly reliable means of feed delivery. Dispense rates were found to be consistent for each feed size (Figure 2). Benefits include less time input, precise control, and increased overall efficiency. Drawbacks include electricity hazards and failure. Automated feeders such as the one used in this study allow for increased efficiency and control of feeding. This contributes to better management and improved hatchery production.