Management of Fisheries

So in the past, how do we manage fishery? We roughly or we probably can say fishery management has four steps. OK, the four step is… 1. First, we establish a scientific foundation. OK, I will just go through the rough idea first. And then get into detail. OK, So first establish scientific foundation. We get the right numbers in understand the ecology So with this slide. We… Then second. We management approach. We establish a management approach based on scientific basis. Input management. Output management. Quota management. Stuff like this. Then. And we do the implementation management. Then, in the fourth. Go back to the first step. Correct according to management result. This is like if you are having engineering background.

If you have a control background it just like every control loop. You first you have a goal and this is actually or a target. This is actually from a scientific foundation. Then after that and you find a way to do that. So your management approach, how do your reach this target or how do you reach this goal. Then this third step is you go ahead do it. And you really put this target or this goal into a real thing. Then the last step is you go to the first step and correct conected management result. This is a wonderful loop. You can see that. Um… The idea itself is no problem,right. Because it is easy. You set a target.

You set a goal. And you do it. You fix it afterward. But the thing is how do you set a reasonable goal, a reasonable target? You said well…we just get the number what we have, we just use the data what we have. Yeah, this is true. But um… I just had a lecture last night. I talk about to my students about errors. How do we know this measurement is correct? You know, the error, the two parts is a measurement error. And you also have the um… when you do the catch calculation errors. So this is how do we know this target is good enough is correct? Because this is really rely on the data we collected before, right.

And the second is um.. How do we…If we do the thing, how do we get the feedback? How do we get this feedback um… good enough the number is good enough? This will be affected by the technology. So you can see this whole major fishery, is…a lot of steps rely on the technology we have. Like how do we set a goal. How do we get a feedback? Everything is about how do we do the management. OK.