Table 1 Summaries of models for lower Utsjoki females and males testing the effects of sea age at maturity (sea age), annual adult sample size (no. of adults), annual offspring sample size (no. of offspring), and adult origin (local or disperser) on reproductive success.

The “zero inflation” term accounts for the large number of adults with zero reproductive success in our sample.

TermParameter
estimate
SEz ValueP
Females
Intercept−6.580.31−20.94<0.0001
Sea age0.610.0513.09<0.0001
No. of adults0.020.021.290.199
No. of offspring−0.020.01−1.630.103
Origin1.380.226.18<0.0001
Zero inflation−8.830.49−18.17<0.0001
Males
Intercept−6.750.20−33.88<0.0001
Sea age0.830.0332.40<0.0001
No. of adults−0.020.00−7.56<0.0001
No. of offspring0.060.024.22<0.0001
Origin0.540.143.75<0.0001
Zero inflation−7.280.14−53.38<0.0001