Thank you for the question.
It's never a good decision to completely close a fishery. As fishers, we often have many years of fishing experience and we follow mackerel and other species, such as flounder and cod, at the time, year after year, as well as seals or any other predators that are in the area. It's a whole.
In the case of the mackerel, it may have started to change its behaviour about 10 years ago. The mackerel spends the whole day completely at the bottom of the water. It looks like a rock in the probe's images. If I can't see it on the probe, I imagine that the Department of Fisheries and Oceans, the DFO, can't see it either.