日本水産工学会誌
Online ISSN : 2189-7131
Print ISSN : 0916-7617
54 巻 , 1 号
選択された号の論文の10件中1~10を表示しています
  • 髙橋 秀行, 佐伯 公康, 渡辺 一俊
    2017 年 54 巻 1 号 p. 1-7
    発行日: 2017年
    公開日: 2018/05/01
    ジャーナル オープンアクセス
    Previous studies have shown that fish sorting is the most time-consuming task in coastal trawl fishing, and that the task is often performed in harmful work postures. Thus, the process of sorting fish in this fishery should be improved. In this study, a workbench to improve posture during fish sorting was tested on a small trawler operating from a local fishing port in Aichi Prefecture. The posture of the fishermen's upper body improved, from stooped to upright, and the proportion of suitable postures increased from 5–8% to 82–96%. No obvious changes were observed in the efficiency of fish sorting when using the workbench. These results demonstrate that introducing a workbench into conventional fish sorting is a valid way to improve the environment for coastal trawl fishery workers.
  • 鈴木 翔太, 多部田 茂, 丸山 拓也, 黒木 洋明, 中村 義治
    2017 年 54 巻 1 号 p. 9-21
    発行日: 2017年
    公開日: 2018/05/01
    ジャーナル オープンアクセス
     A fishery simulator is developed for a bottom otter trawling in Ise Bay, which consists of fish behavioural models for major two species and a fishing operation model. The fish behavioural models simulate resource conditions for two major target species, conger eel and mantis shrimp, considering the fish migration as well as the growth and the population change. The fishing operation model predicts the behaviour of trawling boats based on economic conditions and resource distribution to calculate the fish catch amount by each boat. The developed simulator well reproduced annual variations of CPUE (catch per unit effort) for conger eel and mantis shrimp. It was indicated that precise environmental conditions should be used to predict behaviour of boats accurately. The simulator was also applied to assess the effects of variables within fishery management such as the control of mesh size for trawling nets, the release of small fish, and introduction of facility to keep caught fish alive. The mesh size of trawl net which maximize the fish catch will be different for each fish species. To release larger fish will be effective only for conger eel because of the high mortality rate of released mantis shrimp. The introduction of an on-deck shower device for caught fish will be cost effective as well as easy to reach consensus upon.
  • 李 文沃, 大竹 臣哉, 白 相鎬, 金 鍾圭
    2017 年 54 巻 1 号 p. 23-30
    発行日: 2017年
    公開日: 2018/05/01
    ジャーナル オープンアクセス
    We collected and examined the data of artificial reefs (ARs) that Korea and Japan have developed. ARs projects in Korea have practically started in 1971 under the governmental supervision. As a result, fish catch and income for fishermen appeared to be fairly improved. Recently, however, seaweed reefs are often being installed in shallow coastal areas to create sea afforestation as one of countermeasures of Isoyake. On the other hand, in Japan ARs have been developed and utilized in the earlier times than in Korea. However, ARs installation has just become a national project since 1951. In particular, recently ARs projects have been integrated to be fisheries-based maintenance projects so that Japan could establish a consistent management system for fisheries. On the other hand, ARs used in Korea and Japan did not indicate a big difference in their shape, size, material and weight for a single unit of reef, but they revealed a significant difference in the classification of ARs. In addition, the requirements for ARs were nearly equivalent with each other in their physical, ecological, and economic functions. However, it is essential to secure substantial evidence to evaluate the functions of ARs, such as economic efficiency, safety and stability.
  • 山中 有一, 内山 正樹, 東 隆文, 三橋 廷央
    2017 年 54 巻 1 号 p. 31-34
    発行日: 2017年
    公開日: 2018/05/01
    ジャーナル オープンアクセス
    Training ships of Fisheries College were established to train ship's officers. These were based on the law on University establishment standards. Recent marine science diversifies, and the purpose of a training ship can't be called only the purpose which trains a sailor. For example, recent fishery is required not only to capture but also scientifically analyze and manage resources efficiently. Furthermore, the facilities which can deal with a marine environmental problem are necessary. The new practice ship needs the latest research equipment and a structure that can use them effectively.   Kagoshima University training ship Kagoshima-Maru is based on the 'Basic Act on Ocean Policy' which came into effect in 2007 and was built by aggregating the requirements of the latest equipment and hull structure. In this paper, the concept of Kagoshima-Maru construction and the problems which became obvious later are described.
  • 酒井 久治
    2017 年 54 巻 1 号 p. 35-40
    発行日: 2017年
    公開日: 2018/05/01
    ジャーナル オープンアクセス
     Training vessel, SHINYO MARU of the Tokyo University of Marine Science and Technology was built in March, 2016. She is the training vessel which put emphasis on fisheries science, oceanographic survey and navigation officer education. This paper described the outline of SHINYO MARU and her building record.
  • 林 敏史, 會川 鉄太郎, 吉野 紬, 萩田 隆一
    2017 年 54 巻 1 号 p. 41-46
    発行日: 2017年
    公開日: 2018/05/01
    ジャーナル オープンアクセス
     The research and training vessel SHINYO-MARU Ⅳ was constructed in 2016 for the development of the fishing techniques as well as the training of fishery navigation. For this purpose, the steering quality was well designed by means of equipping her with twin controllable pitch propellers (CPP), large size rudders( Sheering rudder), Anti-rolling tank, and bow thruster.   In order to clarity the maneuvering performance full-scale trial was carried out using by GPS system, where sufficient maneuverability was confirmed. Then, these characteristics were numerically simulated based on IMO regulations of maneuverings. It was found that the results are in good agreement with the results of the full scale trial better than SHINYO-MARU Ⅲ .
  • 萩田 隆一
    2017 年 54 巻 1 号 p. 47-53
    発行日: 2017年
    公開日: 2018/05/01
    ジャーナル オープンアクセス
     Carry out a training item in training efficiently functionally and safely within a limited period. It is important that I let you be interested in the ocean and a ship through training. I took the livability of the person of embarkation, improvement of the convenience, the reduction of the workload of the crew into consideration and examined this building and designed it. In this report, I report a frequent section used in embarkation training.
  • 酒井 久治, 北野 庸介
    2017 年 54 巻 1 号 p. 55-60
    発行日: 2017年
    公開日: 2018/05/01
    ジャーナル オープンアクセス
    Training vessel of Tokyo University of Marine Science and Technology, SHINYO MARU was completed at 31 March, 2016. The electric driven propulsion system in the vessel was equipped in order to reduce underwater radiation noise from the vessel. These consist of two propulsion systems which is composed of the controllable pitch propeller, the propeller shaft, the reduction gear and the electric propulsion motor. This paper described the outline of the propulsion system and their control system, the electric power system and their control system.
  • 甘糟 和男, 會川 鉄太郎, 酒井 久治
    2017 年 54 巻 1 号 p. 61-70
    発行日: 2017年
    公開日: 2018/05/01
    ジャーナル オープンアクセス
    A wide variety of hydroacoustic instruments from conventional standard models to state-of-the-art models was equipped on the new training vessel Shinyo Maru (over all length 64.55 m, domestic gross tonnage 986 tons) of Tokyo University of Marine Science and Technology. These instruments were equipped for use in navigation, fishing, fisheries resources surveys, surveys for biological and physical oceanography, seafloor and sub-bottom exploration, and their education. In this paper, the operating principles and applications of these hydroacoustic instrument are explained. Particularly, in terms of the hydroacoustic instruments used in the field of fisheries acoustics, this paper introduces their research trends. Additionally, useful information on the installation of the hydroacoustic instruments for training and research vessels are presented.
  • 田中 祐志
    2017 年 54 巻 1 号 p. 71-73
    発行日: 2017年
    公開日: 2018/05/01
    ジャーナル オープンアクセス
    Shinyo Maru Ⅳ as a training ship is assigned to produce officers with special skills to contribute to fisheries-related industries and marine-resource exploration/utilization. To fulfill this mission, she possesses a variety of instruments and facilities to execute oceanographic observations in a contemporary manner. There is a CTD system, capable of obtaining depth-distributions of temperature and salinity with world-standard quality, which can be rigged with optional sensors to measure some acoustic, optical and biological properties. This CTD system can be sent down to the deep, through a winch with armored cable of 8 mm in diameter and 7,000 m in length. LARS( launch and recovery system) helps the handling smooth and safe. There also are various kinds of plankton and micro-nekton sampling apparatuses for biological oceanography. For sea-bottom measurements, instruments such as airgun and streamer, autonomous underwater vehicle, remotely operated vehicle can be operated. A 'wet' lab and a 'dry' lab, having decent space separated by a door, are useful for biological/chemical analyses and operations utilizing electronic devices, respectively. All these contemporary equipment will sure be of educational use; moreover, oceanographic observations acquired in the course of education should be invaluable for the progress of ocean sciences.
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