STUDY OF BIOLUMINESCENCE IN DEEP SEA

概要

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This study began with the preliminary testing of the DUMAND (Deep Underwater Muons And Neutrino Detector). In the preliminary test for the DUMAND, luminescence was detected at depths of 1500m to 4700m near Hawaii Island by photomultiplicrs. Measurement was conducted with the detectors suspended from the ship or tethered to the sea bottom. The mean value obtained from the detector tethered to the sea bottom were about 1/10 of the value obtained from the detector suspended from the ship. We came to the conclusion that there is a very high chance that such luminescence exists in all deep water throughout the world's seas. Using a photon counting system which employs a video camera, we found that many light-emitting point sources exist in the surface sea water at Okayama. We also examined how the light intensity changed with depth by sampling water from different depths down to 3500m and analyzing them on board. Video images showed that luminescence in the deep sea came not only from point sources but also from some sizable objects. We arc very interesting to study why such many luminescence organisms exist in all over the world deep sea and also to study environment-related issues of the luminescence.
近畿大学の論文
1993-01-30