Step 6: Performance Indicators
To manage a fishery, we need to know how it is doing with respect to fishery management goals; in other words, we need performance indicators (PIs) that can be measured. Ideally, several PIs will be identified that can be evaluated with independent data streams (for example, fishing mortality and Spawning Potential Ratio (SPR) calculated from length composition of the catch, plus MPA density ratio calculated from visual census data) so that they can be used to corroborate each other and reduce uncertainty about the status of the fishery.
Once a set of PIs have been selected that can tell us how we’re doing at meeting our goals, we’ll identify appropriate Reference Points (RPs) against which to compare them (Step 7), determine some Harvest Control Rules (HCRs) to dictate our choices once our PI measurements come in (Step 8), and then select and conduct the appropriate assessments to confidently measure those PIs given the data we have available (Step 9).
Here are some examples of performance indicators for specific goals:
|Sustainable yields||Fishing mortality rate (F), Spawning Potential Ratio (SPR), % of the catch that is mature|
|Strong fishery profits||Catch Per Unit Effort (CPUE)|
|Healthy stocks and ecosystems||MPA Density Ratio|
For step-by-step guidance on choosing the appropriate PIs for your fishery, see the Guidance document for choosing PIs, identifying RPs, and defining HCRs in the downloadable workbook, and linked on this page.