Striped Trumpeter Catch MSY

Catch-MSY Results

Catch-MSY results based on the assumption of “very low” resilience suggest that Striped Trumpeter biomass could be depleted (Figure 1), with estimates of harvest rate and catch both below estimates of corresponding sustainable limits (Ftarget = 0.04; MSY = 20.70) (Figure 2, Figure 3). Median estimates of biomass depletion peaked at 20% of unfished levels in 2013/14 (lower 90% CI = 10%) with depletion estimates at 23% of unfished levels in 2019/20 (lower 90% CI = 7%) (Figure 2).

Figure 1: Trends in estimated biomass depletion (biomass divided by unfished biomass) and associated confidence intervals (CIs). The dotted red line marks a common target reference point, which is the biomass assumed to deliver the maximum sustainable yield (Btarget). The continuous red line marks a limit reference point (Blimit).
Figure 2: Trends in harvest rate and associated confidence intervals (CIs) relative to the estimated target fishery mortality (Ftarget).

Figure 3: Trends in catch relative to the estimated maximum sustainable yield (MSY) and associated confidence intervals (CIs).