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Fork length of (a) 0+ parr in August 1993 electrofishing sample (1993 cohort), (b) 0+ parr in August 1994 electrofishing sample (1994 cohort), (c) 1+ parr in June 1995 electrofishing sample (1994 cohort) and (d) 0+ parr in August 1998 electrofishing sample (1998 cohort). Error bars are s.d. around the mean per family.
