Productivity Susceptibility Analysis

Productivity Susceptibility Analysis (PSA) is a semi-quantitative approach useful as an exploratory or triage tool that can be used to prioritize research, group species with similar vulnerability or risk, and provide qualitative management advice [1]. Productivity can be described as the capacity of the stock to recover when depleted and susceptibility is the potential for the stock to be negatively impacted by the fishery [1, 2], however, definitions vary according to the parameters of the study. From estimates of these two components, the vulnerability of the stock can be computed.

PSA techniques for bycatch populations are evolving as more studies are completed. Evaluation of vulnerability is generally based on life-history parameters and threats to identify high-risk stocks, then management risk is evaluated by considering factors such as the existence of a stock assessment, management controls, and monitoring and compliance [1]. PSA approaches fall short of providing quantitative management advice, such as appropriate levels of fishing mortality [1].


    1. Cortés E, Brooks EN, Shertzer KW (2015) Risk assessment of cartilaginous fish populations. ICES J Mar Sci 72:1057–1068. doi: 10.1093/icesjms/fsu157
    2. Arrizabalaga H, de Bruyn P, Diaz GA, et al (2011) Productivity and susceptibility analysis for species caught in Atlantic tuna fisheries. Aquat Living Resour 24:1–12. doi: 10.1051/alr/2011007