Figure 5
From: Sailfish migrations connect productive coastal areas in the West Atlantic Ocean
Maximum depth of sailfish.
Predictions from the best-fitting generalized additive mixed model (a) are represented by contours, while tag observations are binned to generate average values in a 1°x1° grid and plotted in false color; estimated individual effect of sea surface temperature on maximum depth (b). Dashed lines show 95% confidence limits. Ticks on x-axis denote values for which there are data. To aid visualization, a horizontal line is added at 0 on the y-axis. Positive values on y-axis mean deeper depth. Depth of longline caught sailfish (c) from the US Observer program 1992–2007 (1944 sets)46, the Japanese research cruise in 2002 in the tropical Atlantic (47 sailfish)48, and small-scale research surveys between 1992–1999 in the southwestern equatorial Atlantic (81 sailfish)47. Hook depths were either calculated46,47 or recorded by time-depth-temperature recorder attached to the hook line48. Maps were generated in R79 (v2.15.2).
