細菌性浮漂物による養殖ヒトエグサの被害について

概要

論文の詳細を見る
In December, 1974, cultivated Monostroma were damaged in the estuary area of the Matsuda river, located in Sukumo City, Kochi Pref., in the western part of Shikoku Island of Japan. The plants of Monostroma were covered with a floating bacterial matrix, so that the production of Monostroma remarkably decreased. Based on the microscopic observation of damaged plants, water and mud analysis, and culture experiments of Monostroma plants using the floating bacterial matrix, it was found that the damage of the Monostroma was caused by the floating bacterial matrix. The floating bacterial matirix consisted of flocks of bacteria agglutinating with much sludge. The external appearance of damaged plants were as follows: (1) plants become fragile and ragged on the edge showing symptoms of a spot disease caused by the bacterial flock, (2) plants changed colour to deep green, (3) plants were covered with the slimy sludge. It was concluded that the floating bacterial matrixes originated from the area near the outlet of the night soil treatment plant which was located at the branch of the Matsuda river.
日本水産學會の論文