We found significant variation among years in the reproductive life-history traits of a single population of the Banded Darter, Etheostoma zonale from the Duck River drainage of Tennessee. Standard length-adjusted average clutch size varied by a factor of 1.38 among years and adjusted ripe egg mass by a factor of 1.21. Interannual variation in E. zonale's clutch size appears to be less extensive than is geographic variation reported previously, and egg size is generally less variable than is clutch size, both geographically and temporally, as has been predicted from life-history theory.

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