What is the role of risk of overfishing and how is it quantified?

• A. The probability that fishing mortality exceeds sustainable levels; quantified in stock assessments with confidence intervals.
• B. The minimum quota set for a season.
• C. The average number of trips per vessel.
• D. The market price volatility.

Answer: (C)

Risk of overfishing is about the probability that the level of fishing mortality exceeds the rate that would keep the stock sustainable, and it’s quantified through stock assessments that include uncertainty. These assessments use data on catches, surveys, growth, and recruitment to estimate current biomass and fishing pressure, then project future stock status under different catch scenarios. The uncertainty in those projections is expressed with confidence (or credible) intervals, which translate into a probability that F exceeds a sustainable threshold or that biomass falls below a safe level. This probabilistic view helps managers judge how risky current or proposed harvest levels are and set precautionary quotas accordingly. The other ideas describe economic factors or operational metrics, not the biological risk of driving the stock beyond sustainable limits.