@article{oai:ir.kagoshima-u.ac.jp:00002318, author = {肥後, 伸夫}, 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 outline of the observation carried out the three sorts of materials, by diving about the artificial reefs for fishes made of concrete block, sunken boat and drum, laid out at the sea bottom in the neighborhood of the Katsuren Peninsula in Okinawa Prefecture, is as follows. 1) As the natural reefs are low, the concrete block reefs, which are general piled, are set low and flatly crowded here. And as the result of the repeated observations the effective area of the reefs are calculated to be 193.2~272.9m^2. 2) It was ascertained that the wider is the effective area the better is the fish school gathering-effect, while the quantity of the attached marine life, such as sea-weeds, aystor, urchn e.t.c., is not necessarily in tune with the gathering effete. 3) The fish-school-gathering-eifect in drum reef is superior to that in concrete reef. In case of the sunken boat reef, the number of the gathered fish is artiticial larger than in case of the other reefs, but the size of the fish is small.}, pages = {19--28}, title = {潜水観察による人工漁礁の実態についてI : 沖縄県勝連半島周辺海域の場合}, volume = {23}, year = {} }