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如同鱼刺到刺网上那样,鱼作用在网片上的瞬时游泳速度和作用力等难以直接测量,目前对此尚无确切了解.本文在笔者过去研究的基础上,对不同体型的几种纺锤形鱼的重心位置、最大横切面面积、从重心到尾端的最大纵切面面积做了测定,对体型做了进一步的分析,明确了不同种的鱼其尾部摆动频数同游泳速度的关系.材料和方法供测定的鱼均为刺网渔获物,其体型分为三大类,共十三种.其中流线型的有远东拟沙丁鱼、日本鲐、驼背大麻哈鱼等,鲷型的有狐鲪,鲆鲽型的有赫氏高眼鲽等.鱼的
As the fishbone to the gill nets, the fish in the mesh on the instantaneous swimming speed and force is difficult to directly measure, at present there is no exact understanding of this article in the past based on the study of different body types of spindle-shaped fish The center of gravity, the maximum cross-sectional area, from the center of gravity to the end of the maximum longitudinal section area was measured, further analysis of body shape, clear the different types of fish tail swing frequency and the relationship between the speed of swimming. The measured fish are Gill net catches, the body is divided into three categories, a total of thirteen kinds of which there are streamlined southeastern proposed sardines, Japanese shrews, humpback salmon, etc., the seabream-type owl, flounder Hershey’s type of high-eyed owl, etc. Fish