英虞湾における漁獲による窒素回収
2007 年 55 巻 4 号 p. 653-654
詳細
2007 年 55 巻 4 号 p. 653-654
Fisheries are known to remove nitrogen from semi-enclosed bays. We estimated removal of nitrogen by fisheries in Ago Bay, Japan in the early 2000s to be 1.2% of the total nitrogen load in the bay. The benthic fish production in the early 2000s was markedly lower (about 1/100) than that in the late 1950s due to the develop-ment of hypoxia in the bottom water. Assuming the same amount of nitrogen is removed by fisheries now as in the late 1950s, we estimate the present nitrogen removal to be 2.1% of the load.
