Yes, the science has evolved. We have new tools that didn't exist 20 years ago in looking at the DNA and looking at the fatty acid analyses that help us have a very good measurement understanding of the prey relationship across the entire marine ecosystem. That has helped us to start documenting the key prey-predator relationships between the stocks.
We look at the entire marine ecosystem: yes, the seals and other pinnipeds, but also the other predators that are in the ocean. Dr. Hammill referred to the telemetry work. Now we have it with satellite tied in and so on. We have much more precise and a much greater amount of data available in the movement of seals and their distribution.
Also, the modelling we do to forecast the population abundance has evolved greatly. It's still evolving with the research. We're refining our understanding of these populations through the years of monitoring and research.