High Food Productivity in Tidal Flat

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Fisheries productivity in Ariake Bay, where tidal flat is most developed in Japan, of 80.5 ton/km2/year in 1979 is 20 times as that in the North Sea and 25 times as that in Chesapeake Bay. Such high fisheries productivity in Ariake Bay is due to high productivity of benthic algae on tidal flat and short food chain from primary producer to commercially important fish (clam in the case of Ariake Bay). The protein productivity in tidal flat of Ariake Bay is nearly the same as the starch productivity in rise field on land. It is very important to preserve the environment of tidal flat as the food source for the people in the 21st century.

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