Fig 1.
(A) Reproductive values and population size during the study period. Bars represent the population size and lines represent the reproductive values of each of the 43 lineages that survived to 2018. (B) Survival probability of 111 house sparrow lineages on Lundy Island from 1999 to 2018. (C) Reproductive values of the 111 lineages. (D) Number of years to lineage extinction for the 111 lineages. Lineages that survived 18, 19, 20 or 21 years are those that were still extant in 2018, corresponding to cohorts 1999, 2000, 2001 and 2002 respectively. (E) Correlation between the reproductive values in each year and the final year.
Fig 2.
Correlation between each of the fitness proxies at different life stages with reproductive value.
Error bars represent 95% confidence intervals. Black bars represent significant results, while light grey bars represent non-significant results.
Fig 3.
(A) Correlation between reproductive value and de-lifed fitness by age class (in years), with 95% confidence intervals. N represents the sample size. Older age classes have lower sample sizes because fewer individuals survive to that age. (B) Correlation between de-lifed fitness and reproductive value. The black cross represents mean de-lifed fitness for the respective age. Colours represent the same age class.
Table 1.
Mean and standard deviation for short-term fitness proxies at different offspring stages, and de-lifed fitness at different ages.
Table 2.
Results of binary logistic regressions with lineage survival as a response variable.
l-95% CI and u-95% CI are the lower and upper boundaries of the 95% confidence interval for the slope, respectively.