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Fecundity of walleyes in western Lake Erie, 1966 and 1990-91

Journal of Great Lakes Research

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Abstract

Ovaries were collected from walleyes (Stizostedion vitreum vitreum) in western Lake Erie just prior to spawning in 1990 and 1991 to determine current fecundity. Results were compared with fecundity determined in 1966 prior to stock rehabilitation when walleye abundance was lower and fish size at age was greater. Fecundity estimates determined from 121 fish aged 3-10 ranged from 53,000 to 426,000 eggs per female. Increases in egg production correlated with increases in lengh and weight, and weight accounting for most of the variability. In 1990-91 the mean egg production of the dominant age groups of spawners (ages 4 to 8) was approximately 25% lower than fishes of similar age in 1966. The mean egg diameter in 1990-91 (1.63 mm) was not related to the size or age of the fish and was not significantly smaller than the egg diameter in 1966 (1.72 mm).

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Fecundity of walleyes in western Lake Erie, 1966 and 1990-91
Series title:
Journal of Great Lakes Research
Volume
19
Issue:
4
Year Published:
1993
Language:
English
Contributing office(s):
Great Lakes Science Center
Description:
p. 715-719
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
715
Last page:
719
Number of Pages:
4