What made these two fisheries the same would be that these were mismanaged by relying on data that didn’t tell the whole story. What made these the different was that the Cod fisheries was in use early than the Pollock so there is still a chance to learn from what happened to the Cod fisheries.
Ok, I wanna start off saying that maybe you should have written a little more on this subject since the book suggested so much when it comes to the similarities and differences between the two fisheries. Secondly, maybe add some more detail about what your talking about instead of leaving it so blank and open to anything. It would add more character to what your trying to say and get a better view point across.