Reproduction, Age, and Growth of the Finescale Dace, Chrosomus neogaeus, in Minnesota

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Abstract
The life history of the finescale dace, Chrosomus neogaeus, was studied in Itasca Park, Minnesota, during 1969‐1971. The breeding season extended from late April through May. The more numerous males pursued females at the spawning sites; egg deposition occurred during an embrace under submerged logs and brush piles. Fecundity can be described by the equation Y = 62.59X − 1,764, where Y is the number of eggs, and × is the standard length (SL). Both sexes reached sexual maturity at age I. After sexual maturity, females grew faster (Y = 9.01X + 30.0) than males (Y = 6.20X + 36.0), where Y is standard length in millimeters, and × is the age in years. The largest female captured was 85 mm SL (age‐class VI); the largest male was 67 mm SL (age‐class V).

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