Abstract
We assessed and investigated actual states of intermediate breedings, fish preservation and aquaculture using water areas in third and fourth class fishing ports in Hokkaido. We also investigated future usage plans for these water areas. We then examined critical wave conditions for different kinds of fish/shellfish breeding works, based on interviews with fishermen. We summarized ploblems in using water areas in fishing ports and presented a case study of Kudoh Fishing Port to provide specific examples of ploblems and possible countermeasures. Finally, we reported on a case study of water exchange breakwaters which enable fish/shellfish breeding in water areas in fishing ports.
