In order to demonstrate an ICT-based aquaculture in a fishing port, the monitoring and conservation systems for the aquaculture environment, remote feeding system and power supply system using renewable energy were constructed, and horse mackerel were culture.
As a result of the demonstration tests conducted for more than two years, each system generally operated as intended. The seawater temperature and DO could be monitored by mobile phones/PC, and when the water temperature exceeded 25°C or the DO values were less than 4 mg/L, alarm e-mails were sent to the person in chage. The air pump was pumped 10 liters air per minute to the aquaculture net when the low DO values were measured. The remote feeding system was seemed to encourage newcomers to aquaculture because fishermen could feed culture fish even when they were operating offshore. In addition, the amount of fish fed had reduced compared to manual feeding with remote feeding. Therefore, we considered that the introduction of ICT-based aquaculture systems would contribute to the prevention of seawater quality by catching of culture fish before they die and reduction of leftover feed.
Because there was no grid power at the test site, renewable energy was used as an electrical power source. As a result, even in the northern Japan region such as the test site, the electricity required for ICT-based aquaculture systems could cover by photovoltaic power generation. Furthermore, we found that equipment costs can be reduced by using the southern exposure parapet of the breakwater as a mount base for PV panels.
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