Your answer may vary. Generally speaking, your overall goal should be to preserve the population such that it can continue to be sustained and reproduce in perpetuity, and any fishing done should be limited to levels that preserve this.
Work Step by Step
You can think of many creative solutions or plans for this, but at their core they should all start with an understanding of the original population size as well as its growth rate and reproductive cycles. This should inform your other decisions, which should include the maintenance of this process.