Ocean water circulation type natural seafood breeding system

摘要

PROBLEM TO BE SOLVED: To provide a marine water-circulatory natural-type fish-and-shellfish breeding system by which terrestrial cultivation fishery activities are conducted, for the purpose of improving the food self-sufficiency rate of marine resources under critically declining tendency stemmed from global warming effects.SOLUTION: The system comprises the following scheme: by utilizing inland's unused farmlands, wastelands, marginal lands, desertified arid regions, etc., sea algal spores are rooted in a rounding-type artificial lagoon A constructed of dug ground, FRP or concrete structure to form a marine algal bank, which is equipped with a gentle slope B where shorereef-natured seabed-living fish-and-shellfish are bred and a sandy layer C where marine water-cleaning actions are conducted by sea algae and bivalves and sandy seabed-living fish-and-shellfish; and marine water brought thereinto by a marine water intake system and a pipeline transport system each with renewable energy as the main power source is circulated in the lagoon to form an artificial marine algal bank by a breeding technology such as for Wakame (Undaria pinnatifida); further, a marine ecological system consisting of the natural world's food chains thanks to the activities of various zoo/phytoplanktons caught via the marine water intake ports is reproduced, thus breeding fish-and-shellfish without feeding.