@article{oai:ir.kagoshima-u.ac.jp:00000704,
 author = {松野, 保久 and 西, 徹 and 有馬, 純宏 and 益満, 侃},
 journal = {鹿児島大学水産学部紀要=Memoirs of Faculty of Fisheries Kagoshima University},
 month = {2016-10-27},
 note = {The observation was carried out on board the Kagoshima-maru, Faculty of Fisheries Kagoshima University, in the middle area of the East China Sea, in the latter part of March, 1975. The reflection loss of the ultrasonic scattering layer was observed by 200 KHz fish-finder. The following results were obtained. (1) The reflection loss of the ultrasonic scattering layer in the night was 7.9 db smaller than that in the day. The reason why this cause may be that the plankton volume in the night was 0.33 ml/m^3 more than that in the day. (2) Although we cannot definitely conclude this, there is every indication that the deeper depth of water becomes, the smaller the reflection loss of the ultrasonic scattering layer becomes. (3) It was not clear that relationship of the reflection loss of the ultrasonic scattering layer to water temperature, salinity and dissolved oxygen.},
 pages = {73--77},
 title = {魚群探知機による東シナ海における超音波散乱層の反射損失についてI},
 volume = {24},
 year = {}
}