Recruitment declines of walleye, Sander vitreus (Mitchill), observed in some northern Wisconsin lakes have resulted in management actions to evaluate and rehabilitate populations. An effective index for estimating relative abundance of yearling walleye is required. The objectives herein were : (a) to evaluate the relationship between yearling walleye electrofishing CPUE and density in northern Wisconsin lakes; (b) to test for the influence of lake‐specific factors on electrofishing catchability of yearling walleye; and (c) to develop an index whereby electrofishing CPUE can be used to quantify yearling walleye relative abundance. Yearling density was significantly positively related to electrofishing CPUE on a long‐term dataset from Escanaba Lake as well as a dataset including several lakes combined. Electrofishing catchability of yearling walleye was negatively related to lake‐surface area but was not related to other lake‐specific variables. This index can provide an efficient method to continue monitoring natural recruitment and also to evaluate survival of stocked walleye.

中文翻译：

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评估威斯康星州北部湖泊的一岁角膜白斑，桑德玻璃体，电钓鱼单位捕捞量与密度之间的关系

角膜白斑，桑德玻璃体的招聘人数下降（Mitchill）在威斯康星州北部的一些湖泊中观察到，已导致采取管理行动来评估和恢复种群。需要一个有效的指数来估算一岁角膜白斑的相对丰度。本文的目标是：（a）评估威斯康星州北部湖泊的一岁角膜白斑电钓鱼CPUE与密度之间的关系；（b）测试湖泊特定因素对一岁角膜白斑鱼的电捕鱼能力的影响；（c）制定一项指标，从而可以使用电钓CPUE量化一岁角膜白斑相对丰度。在Escanaba湖的长期数据集以及包括多个湖泊的数据集中，一岁密度与电捕鱼CPUE呈显着正相关。一岁角膜白斑的电鱼捕捞能力与湖泊表面积呈负相关，但与其他湖泊特定变量无关。该指数可以提供一种有效的方法来继续监测自然募集并评估储备的角膜白斑的存活率。