Sorry to add more to this.
I guess that biomass is one of the indicators we use, but we also use other indicators, like the CPU, the catch per unit effort. If we didn't have the same trend for many indicators, we could say that the biomass itself was wrong. But suddenly when the catch per unit effort is also decreasing, you can actually correlate the fact that there is less crab. The biomass assessment gives you one trend, and then the operation gives you a similar trend. There's not just one indicator, and it can be seen in the different measures.