@article{oai:ir.kagoshima-u.ac.jp:00002229, author = {今井, 健彦 and 平川, 栄一 and 田畑, 静夫}, issue = {1}, journal = {鹿児島大学水産学部紀要=Memoirs of Faculty of Fisheries Kagoshima University}, month = {2016-10-27}, note = {In this paper the authors deal with the model experiments of 6 kinds of four-panelled midwater trawl-nets which were same in constructions, but different in hanging-coefficent. The measurements on the net-shape and towing-net-resistance were carried out in the circuler tank, with about 51 cm/sec of flow-speed. The results obtained are as follows: 1. The net-shape was noted to be different in each net, especially in both the A-net (2% of hanging-coefficent) and the B-net (5% of hanging-coefficent), the cod-end was observed to be fairly expanded. 2. The maximum cross-section-area of net-mouth was obtained in the D-net (15% of hanging-coefficent). 3. Concerning the total towing-net-resistance, the minimum value was showed by the C-net (10% of hanging-coefficent), the maximum by A-net (of the largest mesh number) and the value next to maximum was showed by the F-net (30% of hanging-coefficent; the smallest mesh number). Accordingly, we can assume that, the total net-resistance of bag-net is depending more upon net-shape than upon mesh number of the netting, except those of low hanging-coefficent.}, pages = {117--124}, title = {中層曳網の研究II : 縮結と網成り及び曳網抵抗について}, volume = {25}, year = {} }