Fig. 2
From: Model sensitivity limits attribution of greenhouse gas emissions to polar bear demographic rates
Two different model fits to relate the fasting duration of polar bears to the percent of reproductive females that exhibit reproductive failure. Observed data are from Molnár et al.16 and were collected from polar bears in the Western Hudson Bay subpopulation. The solid black line represents the estimated linear regression fit to the data. The hashed-blue line represents the estimated logistic regression curve fit to the data. The linear regression allows impossible values below 0 and above 100 whereas the fitted logistic curve restrains fitted values within the bounds supported by the underlying process.
