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DICHOTOMOUS KEY TO CLASSIFYING SEA LAMPREY MARKS
CLASSIFYING MULTIPLE AND SLIDING MARKS
A-II attachment site attack as Fig attack marks B-I mark CLASSIFICATION OF SEA classification system classifying sea lamprey Considerable healing Cormorant marks days after detachment—same detachment—same attack diameter DICHOTOMOUS KEY Ebener Edsall system Example of marks Examples of Type exposed muscle exposed musculature fishery agencies healed mark Huron—skin not rough J.H. Hartig King and Edsall Lake Huron Lake Huron—completely healed Lake Huron—considerable Lake Huron—skin Lake Michigan lake sturgeon Lake Superior lake trout taken Lakes areas LAKES FISH Lakes Fishery Commission lamprey detached marking statistics marks on lake multiple and sliding muscle and muscle muscle exposed normally supports scales photo of lake Pigmentation returning pits readily observed record every type repigmentation complete returning to skin rough to touch Scale regeneration sea lamprey marks signs of healing single sea lamprey skin into muscle skin may slough Skin not broken skin surrounding sliding marks Specific criteria touch and white Ulcerated underlying musculature walleye