Scatter Plot from Scientific Research

Estimated population of females (purple), males (yellow), and pups (gray) from a population reconstruction model of California sea lions inhabiting the coastal waters off the west coast of the United States through time (data from Laake et al.7). Dashed lines indicate the local polynomial regression line; colored shadows represent their 95% confidence intervals. Black dots represent the historical population of female and male California sea lions obtained from counts at rookeries and haulouts in southern California.8,9 Vertical gray rectangles represent moderate and strong warm anomalies in the eastern North Pacific after 1972. Data from NOAA.10

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