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Age Determination of Manitoban Walleyes Using Otoliths, Dorsal Spines, and Scales
Author(s) -
Erickson C. M.
Publication year - 1983
Publication title -
north american journal of fisheries management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.587
H-Index - 72
eISSN - 1548-8675
pISSN - 0275-5947
DOI - 10.1577/1548-8659(1983)3<176:adomwu>2.0.co;2
Subject(s) - otolith , dorsum , stizostedion , spine (molecular biology) , biology , anatomy , fish <actinopterygii> , fishery , geology , microbiology and biotechnology
Otolith sections were used to determine ages of walleyes (Stizostedion vitreum) collected from four Manitoban lakes. To verify the presence of annuli on otolith sections, ages determined from otoliths were compared to ages derived from dorsal spine sections and scales; mean body lengths back‐calculated from 252 otolith sections were compared to mean observed lengths; and otolith sections from known‐age walleyes were aged. Otolith sections not only can provide accurate age estimates and back‐calculated length estimates for young walleye populations but also they are easier to age, and consequently are more accurate for determining ages of older walleyes than are scales and dorsal spines.