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Walleye
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===Length and weight=== [[File:walleye weight length graph.jpg|right|thumb|287px|Weight and length of walleyes]] Walleyes grow to about {{convert|80|cm|in|abbr=on}} in length, and weigh up to about {{convert|9|kg|lb|abbr=on}}. The maximum recorded size for the fish is {{convert|107|cm|in|abbr=on}} in length and {{convert|13|kg|lb}} in weight. The rate depends partly on where in their range they occur, with southern populations often growing faster and larger. In general, females grow larger than males. Walleyes may live for decades; the maximum recorded age is 29 years. In heavily fished populations, however, few walleye older than five or six years of age are encountered. In North America, where they are highly prized, their typical size when caught is on the order of {{convert|30|to|50|cm|in|abbr=on}}, substantially below their potential size. As walleye grow longer, they increase in weight. The relationship between total length (''L'') and total weight (''W'') for nearly all species of fish can be expressed by an equation of the form :<math>W = cL^b \,</math> Invariably, ''b'' is close to 3.0 for all species, and ''c'' is a constant that varies among species. For walleye, ''b'' = 3.180 and ''c'' = 0.000228 (with units in inches and pounds) or ''b'' = 3.180 and ''c'' = 0.000005337 (with units in cm and kg).<ref>{{cite encyclopedia |last1=Anderson |first1=R. O.|last2=Neumann|first2=R. M.|title=Length, Weight, and Associated Structural Indices|encyclopedia= Fisheries Techniques|date=1996|editor-last1= Murphy|editor-first1=B. E.|editor-last2=Willis |editor-first2= D. W.|publisher=American Fisheries Society|edition=Second|isbn=1-888569-00-X|location=Bethesda, MD}}</ref> This relationship suggests a {{convert|50|cm|in|abbr=on}} walleye will weigh about {{convert|1.5|kg|abbr=on}}, while a {{convert|60|cm|in|abbr=on}} walleye will likely weigh about {{convert|2.5|kg|abbr=on}}.
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