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Irregularly shaped otoliths from saugers prevent back-calculation of length at previous ages in Wyoming

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Irregularly shaped otoliths from saugers prevent back-calculation of length at previous ages in Wyoming; 1997; Article; Journal; North American Journal of Fisheries Management; Krueger, K. L.; Hubert, W. A.

Summary

We collected otoliths from saugers Stizostedion canadense in Boysen Reservoir, Bighorn Reservoir, and the Bighorn River in Wyoming to evaluate age and growth. All otoliths in our samples (264 fish) were irregularly shaped, and the irregularities became more pronounced with increasing age of the fish. Age estimates with irregular otoliths were possible, but back-calculation of length at previous ages was not possible as a result of radically inconsistent lengths of radii. It should not be assumed that otoliths can be used for back calculation of length at age among all stocks of sauger. The assumption of regular otolith formation within a stock should be tested before obtaining samples of otoliths for age and growth assessment.

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local-index unknown 70019590
local-pk unknown 70019590
series unknown North American Journal of Fisheries Management

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citationTypeArticle
journalNorth American Journal of Fisheries Management
languageEnglish
parts
typevolume
value17
typeissue
value3

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