Which statement best describes the relationship between ABC and ACL?

• A. ABC and ACL are the same thing
• B. ACL is derived from OFL only, with no use of ABC
• C. ABC is the scientifically derived cap used to set the ACL after applying precautionary buffers
• D. ABC is a forecast of future stock abundance

Answer: (C)

Think of the process as a sequence where the safety and uncertainty in the stock assessment are accounted for first, then the actual annual limit is set. The scientifically derived cap, called ABC, is produced after applying precautionary buffers to the scientific limit (the OFL) to guard against uncertainty. The ACL, the annual catch limit used for the year, is then set within that ABC, taking into account other management factors. So ABC serves as the cap based on scientific advice with uncertainty safeguards, and the ACL is the actual yearly limit chosen from within that cap.

This is why the option that describes ABC as the cap derived scientifically and then used to set the ACL after buffering is the best match. It isn’t saying ABC and ACL are the same, nor that ACL comes only from OFL without considering ABC, nor that ABC is a forecast of stock abundance.