METHOD OF TRAWL-FISHING AND OTTER BOARD USED IN THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a method of trawl-fishing by carrying the trawling net as leaving separated from the wake of the trawling boat for preventing the organisms as collection objects from escaping caused by the passage of the trawling boat and the effect of accompanying currents in the surface layer region to enable a quantitative collection, and also to provide an otter board used for the same.;SOLUTION: This trawling net 18 is carried as leaving separated from the wake of the trawling boat 11 by making each of the absolute values of net-spreading force of each of the otter boards 1a, 1b as different.;COPYRIGHT: (C)2007,JPO&INPIT