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首页> 美国政府科技报告 >Fish Community and Fishery of Long Lake, Presque Isle and Alpena Counties, Michigan in 2004-05 With Emphasis on Walleye, Northern Pike, and Smallmouth Bass
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Fish Community and Fishery of Long Lake, Presque Isle and Alpena Counties, Michigan in 2004-05 With Emphasis on Walleye, Northern Pike, and Smallmouth Bass

机译：2004 - 05年密歇根州长湖，普雷斯克岛和阿尔皮纳县的鱼类社区和渔业，重点是大眼鲷，北派克和小嘴鲈鱼

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The Michigan Department of Natural Resources (MDNR), Fisheries Division surveyed fish populations and angler catch and effort at Long Lake, Presque Isle and Alpena counties, Michigan from April 2004 through March 2005. This work was part of the Large Lakes Program, which is designed to improve assessment and monitoring of fish communities and fisheries in Michigans largest inland lakes. The Large Lakes Program has three primary objectives. First, we want to produce consistent indices of abundance and estimates of annual harvest and fishing effort for important fishes. Initially, important fishes were defined as species susceptible to trap or fyke nets and/or those readily harvested by anglers. Our goal is to produce statistics for important fishes to help detect major changes in their populations over time. Second, we want to produce growth and mortality statistics to evaluate effects of fishing on species which support valuable fisheries. This usually involves targeted sampling to collect, sample, and mark sufficient numbers of fish. We selected walleye Sander vitreus, northern pike Esox lucius, and smallmouth bass Micropterus dolomieui as special-interest species in this survey of Long Lake.

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