淡水变水层疏目拖网作业水层的控制与确定

The control and determination of operation water layer of the pelagical trawl with big meshes in fresh water

变水层疏目拖网捕鱼效果的好坏,取决于瞄准捕捞的程度。作者通过多年试验和研究,提出用调整浮沉力、曳纲长度、拖速和两船间距来控制和确定变水层疏目拖网作业水层的方法,在生产实践中得到了广泛的应用,并取得了良好的成效。

Fishing effect of the pelagicl trawl with big meshes depends on aimed fishing grade. The approach of controlling and determining the operation water layer of pelagical trawl with big meshes made by the adjustment of buoysinker force, warp length, towing speed and distance between ships is put forward according to the writer's experiments and researches for many years. It is widely applied in production practice and has achieved good results.