Table 1. Male body shape and female egg mass data summery. We measured midorbital to hyperal length (MOH) along with body depth (BD) in males and egg mass in females. Beach N 51 53 48 152 N 30 MOH (mm) (SE) 514.31 (2.21) 500.60 (5.00) 479.50 (5.96) 498.54 (2.89) MOH (mm) (SE) 468.83 (3.63) BD (mm) (SE) 194.25 (1.45) 191.49 (2.86) 180.46 (3.37) 188.93 (1.60) Egg mass (mg) (SE) 99.16 (2.65) Outlet N 50 50 49 149 N 22 MOH (mm) (SE) 507.08 (6.45) 495.00 (7.93) 489.61 (5.09) 497.28 (3.84) MOH (mm) (SE) 475.36 (4.50) BD (mm) (SE) 185.90 (3.49) 186.00 (4.10) 180.43 (2.50) 184.13 (1.98) Egg mass (mg) (SE) 107.38 (2.78) length of repeat method, the geometric mean of mutation rates of all loci was 3.40 × 10−3 per generation or 6.79 × 10−4 per year (Table 3). We used the lesser rate obtained with the scalar method for all demographic conversions. High point estimates of the posterior probability of the time since onset of divergence ranged from 47 to 123 years prior to sample collection (Table 4, Fig. 5), however, runs 2 and 3 exhibited two and three peaks, respectively, and all peaks occurred between 47 and 400 years prior to sample collection. Mean distribution values of the entire posterior probability distributions for diver- gence times ranged between 389 and 503 years ago (Table 4). It is important to note that with all of the posterior probabil- ities, the y-axis scale is completely dependent on the number of bins in the x-axis (1000). The area under the curve is equal to one. Migration occurred after the onset of population divergence. High point probability estimates of migration rate per generation S C OT T A . PAV E Y E T A L . Sex Males Females Year 2001 2002 2003 All Year 2006 Figure 3. Comparison of body depth in beach and outlet males. Body depth was standardized by ﬁtting regressions of body depth as a function of midorbital to hypural length for each population for each year. Then, the residual of body depth for each ﬁsh from the appropriate regression line was calculated, and that residual was used to calculate a standardized body depth at the aver- age size. Beach males show consistently deeper bodies each year, though the difference is smaller in 2002. 1 7 7 8 EVOLUTION JUNE 2010 Figure 4. Average and standard error of standardized egg weight for beach and outlet female sockeye salmon from Surprise Lake. The residuals are taken from regressions of egg weight against midorbital to hypural length.