Age determination and backcalculation of pike length through use of the metapterygoid bone

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The validity of the metapterygoid bone of pike Esox lucius for use in age determination and backcalculation of total length (LT) was evaluated by using tagged pike recaptured after 4 months to 3 years. A regression equation for the relationship between pike LT and metapterygoid length was estimated, and no significant deviations between the backcalculated and expected LT at tagging were found for recaptured pike. The results confirm that 1) the checks are formed annually and 2) no false checks appeared on the metapterygoids of pike.

Keywords: age; backcalculation; mark-recapture; metapterygoid; pike

Document Type: Research Article


Affiliations: Department of Ecology and Natural Resource Management, Norwegian University of Life Sciences, P. O. Box 5003, NO-1432 Ås, Norway

Publication date: May 1, 2007

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