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Walleye fishing
Fishing for walleye is a popular sport with anglers. The current IGFA all tackle record is 11.34 kilograms (25lb 0oz), caught on August 2nd, 1960 in Old Hickory Lake, Tennessee.〔(''All Tackle Record for Walleye'' ) International Game Fish Association (IGFA).〕
The sport is regulated by most natural resource agencies. Management may include the use of quotas and length limits to ensure that populations are not over-exploited. As one example, in the state of Michigan, walleye of under 15" may not be legally kept, except from Lake St. Clair and the St. Clair River, where walleye of 13" are legal to take. Many states also issue slot regulations on walleye. This is where you can keep fish below a certain size and others above. The slot limit protects the medium sized fish, which can be considered to be at prime sexual maturity.
==Characteristics==
Since walleyes have excellent visual acuity under low illumination levels, they tend to feed more extensively at dawn and dusk, on cloudy or overcast days and under choppy conditions when light penetration into the water column is disrupted. Although anglers interpret this as light avoidance, it is merely an expression of the walleye's competitive advantage over its prey under those conditions. Similarly, in darkly stained or turbid waters, walleye tend to feed throughout the day.
"Walleye chop" is a term used by walleye anglers for rough water typically with winds of 5 to 15 mph (7 to 24 km/h), and is one of the indicators for good walleye fishing due to the walleye's increased feeding activity during such conditions. In sunny conditions walleye move in schools to deeper shady areas, so when one walleye is caught there are usually other walleye feeding in the same location.〔(Walleye ''Sander vitreus '' ) Department of Natural Resources and Environment, Mitchegon. Retrieved 1 November 2010.〕 These schools usually contain walleye of similar age and size.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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