Avian Conservation and Ecology - Écologie et conservation des oiseaux: Lesser Scaup Population Dynamics: What Can Be Learned From Available Data?

Fig. 3. Stable equivalent ratios (SER) indicating the proportionate effect of initially unstable stage distributions on long-term population size. Stage distributions are represented by only the proportion of second-year (SY) individuals because the proportion of after-second-year individuals simply equals 1 – SY. The dotted line represents SER = 1, indicative of a stable population.