摘要
本文研究了鲫鱼在不同条件下对斜向贴底运动纲索的反应距离、方向。主要结果如下:(1)正常鱼对运动纲索的反应距离显著地大于盲鱼。(2)正常鱼原始鱼体方向反向时对运动纲索的转向率显著地大于同向时的转向率,但盲鱼转向率在原始鱼体方向间差异不显著。(3)正常鱼、盲鱼对运动纲索的反应模式可分为A—Ⅰ、Ⅱ型、B—Ⅰ、Ⅱ、Ⅲ型和C—Ⅰ、Ⅱ型三类七种。(4)无论正常鱼还是盲鱼,原始鱼体方向反向时的过索率均显著地大于同向时的过索率。(5)纲索拖速在0.303～0.869米/秒范围内对鲫鱼反应特性没有显著影响。
This paper deals with the reaction distance, reaction derection and reaction pattern of crucian carp to the moving oblique ground rope under different conditions. The main results of investigation are as follows: (1) The veaction distance of the normal fish to the rope is obviously greater than that of the blind fish. (2) The original body direction of the normal fish has evident effect on its direction changing and rope-passing rates. (3) The original body direction of the blind fish has no obvious effect on its direction-changing rate, but evident effect on the rope-passing rate. (4) The reaction patterns of normal or blind fish to the rope can be classified into three types (seven kinds), namely, A-Ⅰ、Ⅱ, B-Ⅰ、Ⅱ、Ⅲ, C-Ⅰ、Ⅱ. (5) Trawling speed within the range of 0.303—0.869m/s has no obvious effect on the characteristics of reaction
