Figure 1
From: Critical assessment and ramifications of a purported marine trophic cascade
Estimated relative abundance for sandbar sharks, dusky sharks and blacktip sharks from the University of North Carolina (UNC) and Virginia Institute of Marine Science (VIMS) shark longline surveys with 95% confidence intervals.
Relative abundance is expressed as the year’s estimated mean index divided by the maximum estimated yearly mean index in each time series. Trend lines are estimated based on the delta-lognormal model fitted responses and plotted using loess smoothing.
