Assigned ages (from otoliths), total length, and collection location of Channel Darter (Percina copelandi).
A data frame of 54 observations on the following 3 variables:
Otolith age-at-capture (years).
Total length (nearest 0.1 mm) at capture.
Location of capture (Salmon or Trent Rivers).
The original author used a linear model to describe the relationship between length and age.
From Figure 2 of Reid, S.M. Age estimates and length distributions of Ontario channel darter (Percina copelandi) populations. Journal of Freshwater Ecology 19:441-444.
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