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前言展望今后的渔业,必须对渔业的概念赋予新的认识,即渔业应从“侦察鱼群,捕获鱼群”转变为“管理鱼群,培殖鱼群”。探测水下的鱼群并把它控制起来,这对渔业来说是一个重要课题,声在这一方面应用最广。我们也考虑过使用光波和电波,但是归根到底,以声波的衰减最少,传播性能最好。而且声音的频率越低,衰减越少,从而传播的距离也最远。声在渔业上利用,可将探鱼仪和水下通信设备也包括在内,但是本文想要探讨的是另一
Foreword Looking forward to the future of fisheries, the concept of fisheries must be given a new understanding that the fisheries should be from the “detection of fish, catch of fish” into “management of fish, breeding of fish”. Detecting and controlling underwater fish stocks is an important issue for fisheries and is the most widely used in this area. We also consider the use of light and electric waves, but in the final analysis, the least attenuation of sound waves, the best propagation performance. And the lower the frequency of sound, the less attenuation, and thus the distance of the farthest. Acoustic fishing is also used in fisheries, including fish finders and underwater communications equipment, but what we are trying to explore is another