论文部分内容阅读
水库中应用“赶、拦、刺、张”联合渔法捕捞中,上层鱼类的效果一般在60%—70%之间,高的可达90%。对于同一种渔具,不同的渔法产生的不同效果在生产中是屡见的,何况还和库形,底貌等因素有关。“赶、拦、刺、张”联合渔法就其作业过程的效果基本上可分为赶鱼的程度和鱼进定置网的情况两部分。根据各地生产情况看来,前者均较理想,后者则悬殊不同。这里除了对定置网的使用不得当外,还和水库底貌有密切关系。一般地说,底貌越复杂其效果就越差。为什么会有这种情况呢?近年
In the reservoir application of “catch, barbed, punctured, Zhang” combined fishing method fishing, the effect of the upper layer of fish is generally between 60% -70%, high up to 90%. For the same kind of fishing gear, the different effects of different fishing methods are common in production, not to mention the factors such as the shape of the storehouse and the appearance. “Catch, barbed, stabbed, Zhang” joint fishing law on the operation of its effect can basically be divided into the degree of catch fish and fish into the setting of the network in two parts. According to the production situation around the view, the former are more ideal, while the latter disparity is different. Here in addition to the use of the setting network must not be inappropriate, but also closely related to the reservoir appearance. In general, the more complex the more complex the effect of the worse. Why is there such a situation? In recent years