In this report, a synthetically improving method of fishing vessel's performances is proposed. Present method is composed on the evaluations of seaworthiness, stability, workability and propulsive performance. Wave resistance of propulsive performance is the most important to determine the fishing vessel's hull form, but it is difficult to estimate quantitatively. Wave resistance is mainly depending on ships'length, prismatic coefficient and sectional area curve, so it must be fixed these three design parameters in terms of the confirmation of minimum wave resistance before present method takes place. After these three design parameters were fixed, taking the improvements on seaworthiness, stability and workability as a constraint, present method decides water line breadth, draft at P.P.s and block coefficient in which the summation of the viscous resistance and resistance increase in waves minimizes. In the application example for the 439-ton type tuna longliner, the reduction of 1〜3% can be expected in effective horse power.
The new method of plantation of Eisenia arborea Areschoug was tried on the rocky shore for the forest regeneration at the mouth of Ise Bay. In December 2004, the sol of the sporophyte (average sporophyte length : 0.46mm, consistency : 5.9×10^3 inds./wet・g)was mixed with the 3% (w/w seawater) sodium alginate and 20% (w/w sodium alginate sol) sand. The sol with the sporophyte was applied to the concrete surface (approximately 0.6m^2) of the artificial reef for abalone located on Toyohama coast in Aichi Prefecture. The sol was fixed on the surface by using the 'Corking gun', an architectural tool, by scuba divers. In April 2005, the fronds have grown on artificial reef. Their length increased from 10cm to 20cm, and their population was estimated at 107inds. This method will reduce labor and cost for seed cultivation, and requires no material to anchor fronds on the seabed.
The availability of the HSI model the authors attempted to examine for quantitative estimation of seaweed bed. The environmental factors used in the HSI model were five items such as water depth, wave height, bottom flow velocity, light intensity and bottom sediment type. The model testing was carried out for examination of habitat suitability of Ecklonia kurome and Sargassum spp. beds on the coast of Kunda Cove in the western part of Wakasa Bay. HSI model results have seen approximately reproduced by the scuba diving observations of seaweed coverage. It seemed that the HSI model would be applicable to estimation of the seaweed habitat suitability by using appropriate environmental factors. And it would be possible to improve the model applicability by defining the relation of each environmental factor more precisely.
A great demand for the guarantee of "safety and reassurance" of foods is extremely high among consumers, fuelled especially by the outbreak of O-157 and BSE problem. The Japan government is promoting development of the environment and hygiene management type fishing ports against the backdrop of the heightened concerns about food safety. One of the obstructions on this promotion has been difficulty in quantifying the effect of such fishing ports in cost-benefit analysis. In this study, the authors assessed consumers "WTP (willingness to pay), analyzed price formation mechanism in producing-area, and showed as a result that the benefit by the management was approximately 10% contribution to the marine products' price.
Governance-style fisheries public policy, which is conducted by a variety of participants as well as the government authorities concerned and fisheries cooperative association, is necessary for the sound development of fisheries industry and revitalization of fishing villages. As visions are indispensable to governance-style policy, the Hokkaido Regional Development Bureau, Ministry of Land, Infrastructure and Transport prepared and published "Hokkaido Marine Vision 21", which shows the fisheries and fishing villages of the future. "Regional Marine Visions", which are designed to realize the Marine Vision 21, have been developed and implemented. Based on the analysis of released regional marine visions, the authors have proposed the methods for evaluating and upgrading the original visions and verified their usefulness. In addition, the authors have studied consensus building process and approach with rationality and fairness regarding to regional marine visions.
The tsunami disaster prevention in fishery area has been developed by the Fisheries Agency in Japan. However, the necessary of new disaster prevention was recognized by the 2004 Sumatra tsunami and 2005 Fukuoka earthquake. Those are "the safety of workers and visitors in the fishery area" and "the preservation of fishery distribution". Therefore, the Fisheries Agency published a guideline, including three necessary factors: the safety of workers and visitors, the prevention of fishery distribution, and the synthetic disaster prevention in fishing village. In this study, the damage is predicted from various tsunami simulations in Kesennuma city, Miyagi and the effectives of tsunami simulation are verified.
The social environment relating to distribution system of the fishery products has been extensively changed in reorganization move of production center markets as well as consuming place markets and under strict administration for installing speed restraint device. To cope with such conditions, research on simulation technique and development of simulation program were worked out for distribution cost, transportation cost・time, CO_2 and so on after reorganization of the markets, based on the investigation about current distribution conditions in the region concerned. This study aims at providing such data and information as required for planning efficient measures to meet any change of distribution conditions, in comparison of several evaluation indices which may regulate efficiency degree in before and after reorganized markets of the fishery products.
The Basic Fishery Law, which states the basic idea and measures of Japanese government's fishery policy, and the Fishing Ports and Grounds Improvement Law were enacted in June 2001. The Fishery Master Plan and Long-Term Plan for Improvement of Fishery Infrastructure were established in March 2002 under the mandate of two laws mentioned above. Four years having passed since, it is required to revise those two plans. On the supposition that what those two plans lack is grasp of situation on the ground, this research suggested the measures of promotion of fishery villages, referring to how to formulate the promotion plans, the possibilities of developing new IT industries, and the use of input-output table.
Hakodate City merged its four neighboring towns in December 2004. The newly-organized city is pushing ahead with its schemes for regional developments centered on the fishery industry. In order to sustain the fishery production and revitalize the local community, it is considered a significant challenge to operate schemes for improving the fishery and its concerned industries, and the travel industry. This can not only contribute to an increase in the production of fishery and other industries, but also lead to the greater employment opportunities, the promotion of new industries, and the economic revitalization of neighboring communities. This research suggested future plans of Hakodate City and a scenario toward the realization of them, analyzing the direction of the policy of regional revitalization and estimating the economic effects with the use of input-output table, in addition to the suggestion of a possible plan for an efficient infrastructure improvement.
The Japanese fishing industry has serious problems, for example, a decrease in population of fishermen and a decline in food self-sufficient rate, etc. Furthermore, there is a strong demand for a stable supply of safe and healthy marine products and a policy for a promotion of the industry and the fishing village. In this background of the fishery industry, a securing of food supply becomes an important problem. Therefore, several traceability systems with information technology for connecting with producers and consumers are tested and attracted considerable attention as a new tool for a reformation of a food supply and distribution system. In this study, the distribution of corbiculae in Jyusanko Lake are picked out as a successful case of traceability system and the fishery industrial promotion with the application of traceability system is reviewed