Model Experiments on the Sea Bottom Fixed Nets for Fishing “Tara”

Abstract

Experiments were made with a model of an improved type of the sea bottom fixed nets used for fishing “Tara” in Aomori Pref. The form of the net, such as the width of the entrance, the slope of the leading to the end etc. were examined under various currents to which the net is subject, varying in both direction and speed. Equillibrium between the floating and sinking forces acting on the net, the maximum current up to which the net can be fixed by the sinkers, and tension on the lines which connect the net to the sinkers were made clear so as to enable us to test the materials to be used.