抄録
Environmental conditions in a tunny fishingboat ("the Taiseimaru", training-ship owned by Mie Prefecture) was investigated, while the boat was engaged in fishing in the South-eastern Pacific Ocean (around the place of latitude 8° south, longitude 110° west) from June to September, 1958. Residential conditions were on the minimum standard. Temperature and humidity inside the boat were not always uncomfortable except in the engine-room, but illumination was insufficient all inside the boat. Radio-activities of the sea water and the rain water were determined, but no appreciable difference from the natural radioactivity was noticed within the area covered. As for health conditions, of the crew, there were many cases of leucocytemia which is believed to be characteristic to ocean navigation. Nutritive intake (calorie, vitamins etc.) was found to be maintained at the minimum of standard, but it is desirable to give an increase.
